Pressure cooking utensil

Abstract

The utility model relates to a pressure cooking utensil. The pressure cooking utensil comprises a pot cover assembly. The pot cover assembly comprises a pot cover and a switching assembly. The pot body is connected with the pot cover, a cooking cavity is formed in the pot body, the pot cover covers the cooking cavity, and the switching assembly is arranged on the side face, facing the cooking cavity, of the pot cover; the switching assembly comprises an operating part, a first sealing piece and a second sealing piece, the first sealing piece and the second sealing piece are movably connected, the first sealing piece is provided with a steam exhaust hole, the operating part is connected with the first sealing piece or the second sealing piece, and the switching assembly is configured to enable the first sealing piece and the second sealing piece to generate relative movement when the operating part is operated. Therefore, the steam exhaust hole can be closed to seal cooking, and the steam exhaust hole can be opened to enable the cooking cavity to be communicated with the outside through the steam exhaust hole. According to the pressure cooking utensil, the switching assembly is arranged on the side face, facing the cooking cavity, of the pot cover, and the operation piece can be prevented from being operated by mistake when the pressure cooking utensil works.

Description

Technical Field

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

[0002] Current electric pressure cookers have a pressure-switching device that allows for both pressurized and unpressurized cooking modes. This device includes an operating mechanism that allows the user to switch between the two modes. However, current operating mechanisms are prone to user error. Utility Model Content

[0003] This invention provides a pressure cooking appliance to solve at least one of the aforementioned technical problems.

[0004] A pressure cooking appliance according to an embodiment of this utility model includes:

[0005] A pot lid assembly, the pot lid assembly including a pot lid and a switching component;

[0006] A pot body, the pot body being connected to the pot lid, a cooking cavity being formed inside the pot body, the pot lid covering the cooking cavity, and a switching component being located on the side of the pot lid facing the cooking cavity;

[0007] The switching assembly includes an operating element, a first sealing plate, and a second sealing plate, which are movably connected. The first sealing plate has a vent hole. The operating element is connected to either the first or the second sealing plate. The switching assembly is configured to cause relative movement between the first and second sealing plates when the operating element is operated, thereby closing the vent hole to seal the cooking chamber and opening the vent hole to allow the cooking chamber to communicate with the outside through the vent hole.

[0008] In the aforementioned pressure cooking appliance, the switching component is located on the side of the lid facing the cooking chamber, which can prevent the operating parts from being accidentally operated when the pressure cooking appliance is working.

[0009] In some embodiments, the vent area of ​​the vent hole is configured to enable pressureless cooking in the pressure cooking appliance when the vent hole is open.

[0010] In some embodiments, the switching assembly is configured such that the first and second sealing plates move relative to each other to adjust the opening area of ​​the vent hole.

[0011] In some embodiments, the first sealing sheet and the second sealing sheet are movably connected, with the second sealing sheet being closer to the cooking cavity than the first sealing sheet.

[0012] In some embodiments, the first sealing sheet includes a first contact plane, and the second sealing sheet includes a second contact plane, wherein the first contact plane and the second contact plane are parallel to and in contact with each other;

[0013] 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 first sealing plate and the second sealing plate 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.

[0014] In some embodiments, the second sealing sheet is capable of planar movement relative to the first sealing sheet 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 second sealing sheet.

[0015] In some embodiments, the second sealing sheet has a notch. When the notch is in communication with the vent hole in the vertical direction, the switching component opens the vent hole. When the notch is not in communication with the vent hole in the vertical direction, the switching component closes the vent hole.

[0016] In some embodiments, the switching assembly includes a valve housing and a sealing gasket. The valve housing has a receiving cavity, and the first sealing plate and the second sealing plate are disposed in the receiving cavity. The receiving cavity has a first opening and a second opening at its two ends, respectively. The sealing gasket is disposed in the first opening. The switching assembly is sealed to the side of the pot lid facing the cooking cavity through the sealing gasket. The operating member extends into the receiving cavity through the second opening and is connected to the second sealing plate. When the vent is open, the cooking cavity communicates with the outside of the cooking cavity through the vent and the second opening.

[0017] In some embodiments, one of the sidewall of the accommodating cavity and the first sealing sheet is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block is disposed in the first limiting groove so that the valve body limits the first sealing sheet.

[0018] In some embodiments, the switching assembly includes a first sealing ring, a first abutting surface is provided on the outer side of the operating member, and a second abutting surface is provided on the inner side of the valve housing facing the accommodating cavity, wherein the first abutting surface and the second abutting surface abut against each other through the first sealing ring.

[0019] In some embodiments, the second abutment surface is provided with a second receiving groove, and a portion of the first sealing ring is received in the receiving groove.

[0020] In some embodiments, one of the second sealing sheet and the operating member is provided with a second limiting groove, and the other is provided with a second limiting block. The second limiting block is disposed in the second limiting groove so that when the operating member moves, the second sealing sheet is driven to move through the cooperation of the second limiting block and the second limiting groove.

[0021] In some embodiments, the actuating element is located on a surface of the second sealing sheet that is different from the surface that contacts the first sealing sheet.

[0022] In some embodiments, the second sealing strip can block part of the vent hole, or block all of it, or not block the vent hole at all.

[0023] In some embodiments, the relative movement between the first sealing sheet and the second sealing sheet includes rotational movement and / or translational movement.

[0024] In some embodiments, the switching assembly has a steam inlet and a steam outlet. The steam inlet is connected to the cooking chamber. When the vent is open, the vent connects the steam inlet and the steam outlet. The steam inlet is located at the bottom of the switching assembly, and the steam outlet is located at the top of the switching assembly.

[0025] In some embodiments, the lid assembly includes a fixing portion disposed on the side of the lid facing the cooking cavity, and the switching assembly is fixedly connected to or detachably connected to the fixing portion.

[0026] In some embodiments, the fixing part is provided with a fixing post, the switching component is provided with a mounting hole, and the switching component is connected to the fixing part by means of a fastener passing through the mounting hole.

[0027] In some embodiments, one of the fixing part and the switching assembly is provided with a screw hole, and the other is provided with a stud. The fixing part and the switching assembly are connected by the stud and the screw hole cooperating with each other.

[0028] In some embodiments, the lid assembly includes a cover plate and a fixing portion disposed on the side of the lid facing the cooking cavity, wherein the cover plate is fixedly connected to or detachably connected to the switching assembly and the fixing portion.

[0029] In some embodiments, the pressure cooking appliance satisfies at least one of the following: the steam vent area is greater than or equal to 19.5 mm² and less than or equal to 314 mm²;

[0030] The first sealing sheet and the second sealing sheet are made of hard material, and the Vickers hardness of the hard material is greater than or equal to 50HV5;

[0031] 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.

[0032] 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

[0033] 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:

[0034] Figure 1 This is a cross-sectional schematic diagram of a pressure cooking appliance according to an embodiment of the present invention;

[0035] Figure 2 This is another cross-sectional schematic diagram of the pressure cooking appliance according to an embodiment of the present invention;

[0036] Figure 3 This is an exploded view of the pot lid and switching component according to an embodiment of the present invention.

[0037] Figure 4 This is another exploded view of the pot lid and switching component according to an embodiment of the present invention;

[0038] Figure 5 This is an exploded view of the switching component according to an embodiment of the present invention;

[0039] Figure 6 This is another exploded view of the switching component according to an embodiment of the present invention;

[0040] Figure 7 This is a cross-sectional schematic diagram of the pressure cooking appliance of this utility model under pressure.

[0041] Figure 8 This is a cross-sectional schematic diagram of the pressure cooking appliance of this utility model in a pressureless state;

[0042] Figure 9 This is another cross-sectional schematic diagram of the pressure cooking appliance of this utility model under pressure.

[0043] Figure 10 This is another cross-sectional schematic diagram of the pressure cooking appliance under pressure according to the embodiment of this utility model;

[0044] Figure 11 This is another cross-sectional schematic diagram of the pressure cooking appliance of this utility model in a pressureless state;

[0045] Figure 12 This is another cross-sectional schematic diagram of the pressure cooking appliance of this utility model under pressure.

[0046] Figure 13 This is a schematic diagram of the structure of the first sealing sheet and the second sealing sheet under pressure according to an embodiment of the present invention;

[0047] Figure 14 This is a schematic diagram of the structure of the first sealing sheet and the second sealing sheet under pressure switching state according to an embodiment of the present invention;

[0048] Figure 15 This is a schematic diagram of the structure of the first sealing sheet and the second sealing sheet in a pressureless state according to an embodiment of the present invention;

[0049] Figure 16 This is another structural schematic diagram of the first and second sealing sheets under pressure in an embodiment of the present invention;

[0050] Figure 17 This is another structural schematic diagram of the first and second sealing sheets in the pressure switching state according to an embodiment of the present invention;

[0051] Figure 18 This is another structural schematic diagram of the first and second sealing sheets in a pressureless state according to an embodiment of the present invention;

[0052] Figure 19 This is another structural schematic diagram of the first sealing sheet and the second sealing sheet under pressure in an embodiment of the present invention;

[0053] Figure 20 This is another structural schematic diagram of the first and second sealing sheets in a pressureless state according to an embodiment of the present invention;

[0054] Figure 21 This is a schematic diagram of the valve housing according to an embodiment of the present utility model;

[0055] Figure 22 This is a schematic diagram of the structure of the operating component according to an embodiment of the present invention;

[0056] Figure 23 This is another structural schematic diagram of the operating component according to an embodiment of the present utility model;

[0057] Figure 24 This is a schematic diagram of the structure of the second sealing sheet according to an embodiment of the present invention;

[0058] Figure 25 This is another structural schematic diagram of the second sealing sheet according to an embodiment of the present invention;

[0059] Figure 26 This is a schematic diagram of the structure of the first sealing sheet according to an embodiment of the present invention;

[0060] Figure 27 This is a schematic diagram of the structure of the cover plate according to an embodiment of the present utility model;

[0061] Figure 28 This is a schematic diagram showing the connection between the cover plate and the switching component according to an embodiment of the present invention;

[0062] Figure 29 This is an exploded view of the cover plate and switching assembly according to an embodiment of the present utility model;

[0063] Figure 30 This is a diagram showing the relationship between the steam vent area and the power of the pressure cooking appliance in an embodiment of this utility model.

[0064] Explanation of key figure labels:

[0065] First sealing plate - 11, second sealing plate - 14, vent hole - 17, notch - 23, first contact surface - 26, second contact surface - 29, valve body - 32, sealing gasket - 35, receiving cavity - 38, first opening - 41, second opening - 43, first limiting groove - 46, first limiting block - 49, operating element - 52, first sealing ring - 61, first abutment surface - 64, second abutment surface - 67, receiving groove - 73, second limiting groove -76, Second limiting block -79, Steam inlet -82, Steam outlet -85, Fixing part -88, Fixing post -91, Mounting hole -94, Fastener -97, Screw hole -100, Screw stud -103, First guide part -106, Cover plate -109, Fixing part -112, Handle -115, Second sealing ring -118, Switching assembly -150, Pot body -200, Cooking cavity -250, Pot lid -300, Pot lid assembly -400.

[0066] Pressure cooking appliance - 500. Detailed Implementation

[0067] The embodiments of this utility model are described in detail below. Examples of these 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Please see Figure 1 , Figure 3 and Figure 4 The present invention provides a pressure cooking appliance 500, comprising a lid assembly 400 and a pot body 200. The lid assembly 400 includes a lid 300 and a switching assembly 150. 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, and the switching assembly 150 is disposed on the side of the lid 300 facing the cooking cavity 250. The switching assembly 150 includes an operating member 52, a first sealing plate 11, and a second sealing plate 14. The first sealing plate 11 and the second sealing plate 14 are movably connected. The first sealing plate 11 is provided with a steam vent 17. The operating member 52 is connected to the first sealing plate 11 or the second sealing plate 14. The switching assembly 150 is configured to cause the first sealing plate 11 and the second sealing plate 14 to move relative to each other when the operating member 52 is operated, thereby closing the steam vent 17 to seal the cooking chamber 250, and opening the steam vent 17 to allow the cooking chamber 250 to communicate with the outside of the cooking chamber 250 through the steam vent 17.

[0073] In the pressure cooking appliance 500 described above, the switching component 150 is located on the side of the lid 300 facing the cooking chamber 250, which can prevent the operating component 52 from being accidentally operated when the pressure cooking appliance 500 is in operation.

[0074] Specifically, in this embodiment of the invention, the pressure cooking appliance 500 can operate in both pressurized and unpressurized cooking modes. Under pressurized cooking, the switching component 150 can close the vent 17, sealing the cooking chamber 250, thereby allowing pressurized cooking of the food. Under unpressurized cooking, the switching component 150 can open the vent 17, connecting the cooking chamber 250 to the outside environment, thereby allowing unpressurized cooking of the food.

[0075] Pressure cooking appliances 500 include, but are not limited to, pressure cookers, electric pressure cookers, pressure slow cookers, etc. Please refer to... Figure 1 The pressure cooker 500 includes a lid 300, a pot body 200, and a cooking chamber 250. When the lid 300 and pot body 200 are closed, they fit tightly together via a first sealing ring 61, forming a relatively enclosed cooking chamber 250. When the vent 17 is closed and the pressure cooker 500 begins to operate, the food inside the cooking chamber 250 is heated, the water inside the cooking chamber 250 begins to evaporate, and the amount of steam gradually increases, causing the pressure inside the cooking chamber 250 to gradually rise. Because the cooking chamber 250 is sealed at this time, the steam cannot escape from the pressure cooker 500, resulting in the pressure inside the cooking chamber 250 being maintained. This raises the boiling point of the water, thereby accelerating the cooking process.

[0076] To provide more cooking options and flexibility to meet different ingredients and cooking needs, pressure cookers 500 typically employ a pressure-free / pressure-free switching device to achieve both pressurized and unpressurized cooking modes. In related technologies, this switching device includes an operating component that allows the user to switch between pressurized and unpressurized cooking modes. However, most pressure cookers typically place the pressure-free / pressure-free switching device on the side of the lid furthest from the cooking cavity. Therefore, the operating component is easily misoperated by the user during pressure cooker operation, causing the pressure cooker to operate in a cooking mode that is incompatible with the user's needs.

[0077] In this embodiment of the invention, the switching assembly 150 is disposed on the side of the pot lid 300 facing the cooking cavity 250. The switching assembly 150 includes a first sealing plate 11 and a second sealing plate 14, which are movably connected. Figure 5 In this embodiment, the first sealing plate 11 is located above the second sealing plate 14, and the first sealing plate 11 is provided with a vent hole 17. Optionally, in one embodiment, the first sealing plate 11 is located above the second sealing plate 14, and the second sealing plate 14 is provided with a vent hole 17.

[0078] In one embodiment, the first sealing plate 11 may be located below the second sealing plate 14, and the first sealing plate 11 is provided with a vent hole 17. The positions of the first sealing plate 11 and the second sealing plate 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.

[0079] In one embodiment, the first sealing sheet 11 may be fixed, and the second sealing sheet 14 may be movable. In another embodiment, the first sealing sheet 11 may be movable, and the second sealing sheet 14 may be fixed. In yet another embodiment, both the first sealing sheet 11 and the second sealing sheet 14 may be movable.

[0080] Optionally, the switching component 150 can be located at any position on the side of the lid 300 facing the cooking cavity 250, for example, it can be located at the center of the side or at the periphery of the side.

[0081] In some embodiments, the vent area of ​​the vent 17 is configured such that when the vent 17 is open, the pressure cooking appliance 500 can perform pressureless cooking.

[0082] In this way, the exhaust area can meet the exhaust requirements of the pressure cooking appliance 500 under pressureless cooking, so that pressureless cooking can be achieved without reducing the power of the pressure cooking appliance 500, thus improving the user experience.

[0083] Specifically, in this embodiment of the invention, the pressure cooking appliance 500 can operate in both pressurized and unpressurized cooking modes. Under pressurized cooking, the switching component 150 can close the vent 17, sealing the cooking chamber 250, thereby allowing pressurized cooking of the food. Under unpressurized cooking, the switching component 150 can open the vent 17, connecting the cooking chamber 250 to the outside environment, thereby allowing unpressurized cooking of the food.

[0084] It should be noted that the pressureless cooking described in this invention refers to cooking in the pressure chamber 250 of the pressure cooker 500 when the pressure is less than or equal to 4 kPa. The venting area of ​​the vent hole 17 can be understood as the opening area of ​​the vent hole 17. In one embodiment, when the vent hole 17 is fully open, the entire venting area of ​​the vent hole 17 is used for venting steam, enabling the pressure cooker 500 to achieve pressureless cooking. In another embodiment, when the vent hole 17 is partially open, a portion of the venting area of ​​the vent hole 17 can be used for venting steam, enabling the pressure cooker 500 to achieve pressureless cooking.

[0085] When the vent 17 is opened to a certain size (fully or partially), the vent area of ​​the vent 17, which enables pressure cooking 500 to achieve pressureless cooking, is related to the power of the pressure cooking appliance 500. Generally, the higher the power of the pressure 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 pressure cooking appliance 500 can be determined through simulation, testing, and empirical values. In some examples, please refer to... Figure 30 , Figure 30 The relationship between the vent area of ​​the vent 17 and the power of the pressure cooking appliance 500 is shown under pressureless cooking (pressure of 4 kPa in the cooking chamber 250).

[0086] 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.

[0087] In this embodiment of the invention, the steam vent 17 of the lid assembly 400 has a steam vent area that can meet the steam venting requirements of the pressure cooking appliance 500 in the pressureless cooking mode, thereby enabling pressureless cooking without reducing the power of the pressure cooking appliance 500 and improving the user experience.

[0088] 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 power of the pressure cooker 500 is 2.2kW. The first sealing plate 11 is provided with at least one vent 17, and the venting area S of the vent 17 is greater than 12.9mm², to ensure effective control of the internal pressure during the cooking process of the pressure cooker 500.

[0089] When there is a single vent hole 17, the vent area S of the vent hole 17 is greater than or equal to 12.9 mm². When there are multiple vent holes 17 (two or more), the total vent area S of all vent holes 17 is greater than or equal to 12.9 mm². The vent area of ​​each vent hole 17 can be the same or different, and no specific limitation is made here. This design, to a certain extent, ensures that when the pressure cooking appliance 500 is operating in the 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 pressure cooking appliance 500. The number of vent holes 17 can be specifically limited according to actual conditions, and this utility model does not make a specific limitation in this regard. In one example, please refer to... Figure 26 The number of exhaust vents 17 can be 2.

[0090] Please see Figures 13 to 15 The switching component 150 is configured such that the first sealing plate 11 and the second sealing plate 14 can generate relative movement to open and close the vent hole 17, and adjust the opening area of ​​the vent hole 17. When the entire venting area of ​​the vent hole 17 is used for venting (the vent hole is fully open), the pressure cooking appliance 500 can achieve a pressureless cooking mode. Optionally, opening the vent hole 17 refers to any state other than closing the vent hole 17. When a portion of the venting area of ​​the vent hole 17 is used for venting (the vent hole 17 is partially open), pressure cooking modes with different pressures can be achieved. With a fixed heating power of the pressure cooking appliance 500, the larger the area of ​​the vent hole 17 used for venting, the lower the pressure within the cooking chamber 250.

[0091] Please combine Figure 7 and Figure 13 The second sealing plate 14 can close the vent 17 to seal the cooking chamber 250, preventing steam from escaping from the pressure cooking appliance 500, and maintaining the pressure within the cooking chamber 250 at the level required for cooking. Figure 14 In this process, the second sealing plate 14 can open a portion of the vent hole 17, allowing the cooking chamber 250 to communicate with the outside through the vent hole 17. A portion of the steam inside the cooking chamber 250 can escape from the pressure cooking appliance 500, and the pressure inside the cooking chamber 250 decreases as the area of ​​the vent hole 17 that is opened increases. Please refer to... Figure 8 and Figure 15 The second sealing plate 14 can fully open the vent 17, allowing the cooking chamber 250 to communicate with the outside through the vent 17. Most of the steam inside the cooking chamber 250 can escape from the pressure cooking appliance 500, leaving the cooking chamber 250 in a partially pressureless state, enabling pressureless cooking. In summary, in this embodiment of the invention, the pressure cooking appliance 500 can adjust the opening area of ​​the vent 17 by the relative movement between the first sealing plate 11 and the second sealing plate 14, allowing the pressure cooking appliance 500 to switch between pressurized and pressureless cooking. Furthermore, pressureless cooking can be achieved without reducing the power of the pressure cooking appliance 500, improving the user experience.

[0092] 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.

[0093] In some embodiments, the switching assembly 150 is configured such that the first sealing plate 11 and the second sealing plate 14 move relative to each other to adjust the opening area of ​​the vent 17. Thus, the pressure within the cooking cavity 250 can be adjusted by regulating the opening area of ​​the vent 17. Specifically, adjusting the opening area of ​​the vent 17 can refer to adjusting the opening area of ​​the vent 17 while it is in the open state. In one example, the vent 17 is initially closed, and the second sealing plate 14 is controlled to move relative to the first sealing plate 11 to open the vent 17. While the vent 17 is open, the relative movement of the second sealing plate 14 and the first sealing plate 11 is controlled to adjust the opening area of ​​the vent 17, for example, from 50%×S to 80%×S, where S is the vent area of ​​the vent 17.

[0094] Please combine Figure 13 The second sealing plate 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 15 In the middle, the second sealing plate 14 opens a portion of the vent hole 17, and the pressure inside the cooking cavity 250 decreases as the opening area of ​​the vent hole 17 increases; please refer to Figure 15In one embodiment, the second sealing plate 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 pressure cooking appliance 500 can perform pressureless cooking.

[0095] 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 pressure cooker 500 to perform pressureless cooking. In such an embodiment, the second sealing plate 14 can further reduce the open area of ​​the vent 17 (greater than zero), enabling the pressure cooker 500 to perform micro-pressure cooking (a low-pressure pressurized cooking mode). The second sealing plate 14 can further increase the open area of ​​the vent 17, enabling the pressure cooker 500 to perform pressureless cooking.

[0096] 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 pressure cooker 500 to achieve pressureless cooking (the pressure inside the cooking chamber 250 is less than or equal to 4 kPa). When the second sealing plate 14 moves to make the opening area of ​​the vent hole 17 50% × S, the pressure cooker 500 performs micro-pressure cooking (e.g., the pressure inside the cooking chamber is greater than 4 kPa). When the second sealing plate 14 moves to make the opening area of ​​the vent hole 17 90% × S, the pressure cooker 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. In some embodiments, the first sealing plate 11 and the second sealing plate 14 are movably connected, with the second sealing plate 14 being closer to the cooking chamber 250 than the first sealing plate 11.

[0097] Thus, the movably connected first sealing plate 11 and second sealing plate 14 allow the pressure cooking appliance 500 to flexibly switch between different cooking modes, thereby meeting different cooking needs and enhancing the diversity and flexibility of cooking. Specifically, please refer to... Figure 5 The first sealing plate 11 and the second sealing plate 14 are stacked, with the first sealing plate 11 above the second sealing plate 14, allowing relative movement between them to open or close the vent 17. The second sealing plate 14 is closer to the cooking chamber 250 than the first sealing plate 11, which also brings the operating element 52 closer to the cooking chamber 250, reducing the risk of accidental operation when the pressure cooker 500 is in operation. This design ensures that the pressure cooker 500 operates in the desired cooking mode, improving its cooking efficiency to some extent.

[0098] In some embodiments, the first sealing plate 11 includes a first contact surface 26, and the second sealing plate 14 includes a second contact surface 29, wherein the first contact surface 26 and the second contact surface 29 are parallel to and in contact with each other. The switching assembly 150 is configured to, when the first sealing plate 11 and the second sealing plate 14 move relative to each other, close the vent 17 to seal the cooking chamber 250 through the tight contact between the first contact surface 26 and the second contact surface 29, and to, when the first sealing plate 11 and the second sealing plate 14 move relative to each other, open the vent 17 to allow the cooking chamber 250 to communicate with the outside world through the vent 17.

[0099] In this way, the steam exhaust demand of the pressure cooking appliance 500 under pressureless cooking can be met by the relative movement between the first contact plane 26 of the first sealing plate 11 and the second contact plane 29 of the second sealing plate 14. Pressureless cooking can be achieved without reducing the power of the pressure cooking appliance 500, thus improving the user experience.

[0100] Specifically, the first sealing sheet 11 and the second sealing sheet 14 can be ceramic sheets.

[0101] Please combine Figures 24 to 26 The interface connecting the first sealing plate 11 and the second sealing plate 14 is planar. Specifically, the first contact plane 26 between the first sealing plate 11 and the second sealing plate 14 is planar, and the second contact plane 29 between the second sealing plate 14 and the first sealing plate 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 first sealing plate 11 and the second sealing plate 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 pressure cooking appliance 500 to switch between pressurized and non-pressurized cooking.

[0102] In some embodiments, the second sealing plate 14 is capable of planar movement relative to the first sealing plate 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 sealing plate 14.

[0103] Thus, when the second sealing plate 14 moves in a planar motion relative to the first sealing plate 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 adjust the pressure inside the cooking chamber 250, allowing the pressure cooking appliance 500 to flexibly adjust the internal pressure according to different cooking needs, thereby enhancing cooking efficiency and safety to a certain extent.

[0104] Specifically, in order for the pressure cooking appliance 500 to flexibly adjust its internal pressure according to different cooking needs and improve cooking results, the opening area of ​​the steam vent 17 can vary within a certain range. In this embodiment of the invention, please refer to... Figures 13 to 18The first sealing plate 11 and the second sealing plate 14 are stacked, with the first sealing plate 11 above the second sealing plate 14. The first contact plane 26 is located above 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 second sealing plate 14 can move planarly relative to the first sealing plate 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 ability of the second sealing plate 14 to move planarly relative to the first sealing plate 11 can reduce the height of the pot lid assembly 400 to a certain extent. Figures 13 to 15 In this process, the planar motion of the second sealing plate 14 relative to the first sealing plate 11 is a rotational motion. The second sealing plate 14 can rotate relative to the first sealing plate 11, thereby opening or closing the vent hole 17. Figures 16 to 18 In this process, the planar motion of the second sealing plate 14 relative to the first sealing plate 11 is a translational motion. The second sealing plate 14 can translate relative to the first sealing plate 11, thereby opening or closing the vent hole 17.

[0105] Please combine Figures 13 to 15 The opening area of ​​the vent 17 can be changed according to the relative movement stroke (rotation angle or translation distance) of the second sealing plate 14, which can adjust the pressure in the cooking chamber 250. The pressure cooking appliance 500 can switch between pressurized and unpressurized 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.

[0106] In some embodiments, the second sealing sheet 14 is provided with a notch 23. When the notch 23 is connected to the vent hole 17 in the vertical direction, the switching component 150 opens the vent hole 17. When the notch 23 is not connected to the vent hole 17 in the vertical direction, the switching component 150 closes the vent hole 17.

[0107] Thus, the cooperation between the notch 23 and the vent hole 17 allows the vent area of ​​the vent hole 17 to be adjusted to regulate the degree of connection between the cooking cavity 250 and the outside world, enabling the pressure cooking appliance 500 to flexibly adjust the pressure inside the cooking cavity 250 according to different cooking needs.

[0108] Specifically, please combine Figures 7 to 8 and Figures 13 to 15The notch 23 is located on the side of the second sealing plate 14. When the notch 23 is connected to the vent 17 in the vertical direction, the switching component 150 opens the vent 17, connecting the cooking chamber 250 to the outside, allowing steam to be released. When the notch 23 is not connected to the vent 17 in the vertical direction, the switching component 150 closes the vent 17, preventing the cooking chamber 250 from connecting to the outside and maintaining a sealed state, thus preventing steam from escaping from the cooking chamber 250 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 17.

[0109] Optionally, the area of ​​the notch 23 is not less than the steam vent area of ​​the vent hole 17, so that the vent hole 17 can be fully opened when the pressure 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.

[0110] In some embodiments, the switching assembly 150 includes a valve housing 32 and a sealing gasket 35. The valve housing 32 has a receiving cavity 38. A first sealing plate 11 and a second sealing plate 14 are disposed in the receiving cavity 38. 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 side of the pot lid 300 facing the cooking cavity 250 through the sealing gasket 35. The operating member 52 extends into the receiving cavity 38 through the second opening 43 and is connected to the second sealing plate 14. When the vent hole 17 is open, the cooking cavity 250 communicates with the outside of the cooking cavity 250 through the vent hole 17 and the second opening 43.

[0111] 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.

[0112] Specifically, please refer to Figure 5 The valve housing 32 has a receiving cavity 38, which can accommodate the stacked first sealing sheet 11 and second sealing sheet 14. A sealing gasket 35 is located above the first sealing sheet 11, abutting against the surface of the first sealing sheet 11 away from the cooking cavity 250. The sealing gasket 35 can seal the connection between the first sealing sheet 11 and the pot lid 300. The pot lid 300 has a through hole, 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 first sealing sheet 11.

[0113] Please combine Figure 21The 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 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 sealing gasket 35 can seal the switching assembly 150 and the pot lid 300, preventing steam from leaking out from the gap between the pot lid 300 and the switching assembly 150 and affecting the cooking effect.

[0114] In some embodiments, one of the sidewall of the accommodating cavity 38 and the first sealing sheet 11 is provided with a first limiting groove 46, and the other is provided with a first limiting block 49. The first limiting block 46 is disposed in the first limiting groove 49 so that the valve shell 32 limits the first sealing sheet 11.

[0115] Thus, the first limiting block 49 and the first limiting groove 46 can cooperate with each other, so that the valve body 32 can restrict the movement of the first sealing plate 11.

[0116] Specifically, in the embodiments of this utility model, please refer to... Figure 5 , Figure 21 and Figure 26 The first limiting groove 45 is provided on the side wall of the receiving cavity 38 of the valve housing 32, and the first limiting block 49 is provided on the circumferential side of the first sealing plate 11. In other embodiments, the first limiting groove 45 may be provided on the circumferential side of the first sealing plate 11, and the first limiting block 49 may be provided on the side wall of the receiving cavity 38 of the valve housing 32.

[0117] The first limiting block 49 can be inserted into the first limiting groove 46, so that the valve body 32 and the first sealing plate 11 are tightly fitted, which can restrict the movement of the first sealing plate 11, and allow the second sealing plate 14 to move relative to the first sealing plate 11 (such as rotational or translational movement).

[0118] This embodiment of the invention does not specifically limit the number of the first limiting groove 46 and the first limiting block 49. In one example, there are two first limiting grooves 46 and two first limiting blocks 49. One first limiting block 49 is disposed in a corresponding first limiting groove 46.

[0119] In some embodiments, the switching assembly 150 includes a first sealing ring 61, a first abutting surface 64 is provided on the outer side of the operating member 52, and a second abutting surface 67 is provided on the inner side of the valve housing 32 facing the receiving cavity 38. The first abutting surface 64 and the second abutting surface 67 abut against each other through the first sealing ring 61.

[0120] Thus, the first sealing ring 61 can seal the connection between the operating element 52 and the valve housing 32, preventing steam from leaking out from the gap between the operating element 52 and the valve housing 32 during the pressureless cooking mode, thus affecting the cooking effect.

[0121] Specifically, the main function of the first sealing ring 61 is to ensure that a relatively sealed closed space can be formed inside the switching assembly 150, ensuring the normal operation of the pressure cooking appliance 500. Please refer to... Figure 8 The outer side of the operating component 52 is provided with a first abutting surface 64, and the inner side of the valve housing 32 facing the accommodating cavity 38 is provided with a second abutting surface 67. The first abutting surface 64 and the second abutting surface 67 are abutted by a first sealing ring 61 to prevent steam from leaking out from the gap between the operating component 52 and the valve housing 32 in the pressureless mode. At the same time, it can reduce the friction between the operating component 52 and the valve housing 32, and extend the service life of the switching component 150 to a certain extent.

[0122] In some embodiments, a first receiving groove 70 is provided on the first abutting surface 64, and a second receiving groove 73 is provided on the second abutting surface 67. A portion of the first sealing ring 61 is received in the first receiving groove 70, and another portion is received in the second receiving groove 73.

[0123] Thus, the cooperation between the first receiving groove 70 and the second receiving groove 73 can ensure that the first sealing ring 61 is accurately placed, preventing the first sealing ring 61 from shifting and affecting its position.

[0124] Specifically, please combine Figure 8 The outer surface of the operating component 52 is provided with a first abutting surface 64, and the first abutting surface 64 is provided with a first receiving groove 70. The inner surface of the valve housing 32 facing the receiving cavity 38 is provided with a second abutting surface 67, and the second abutting surface 67 is provided with a second receiving groove 73. The first receiving groove 70 and the second receiving groove 73 can form a receiving space in which the first sealing ring 61 is received. The placement position of the first sealing ring 61 can be accurately positioned. At the same time, this receiving space can also limit the first sealing ring 61, which can ensure the sealing effect of the first sealing ring 61. A part of the first sealing ring 61 is received in the receiving groove 73. Under the action of pressure, the first sealing ring 61 and the receiving groove 73 can form a uniform and tight sealing space, which improves the sealing effect to a certain extent and prevents steam from leaking out from the gap between the operating component 52 and the valve housing 32.

[0125] In some embodiments, one of the second sealing sheet and the operating member 52 is provided with a second limiting groove 76, and the other is provided with a second limiting block 79. The second limiting block 79 is provided in the second limiting groove 76 so that when the operating member 52 moves, the second sealing sheet 14 is driven to move through the cooperation of the second limiting block 79 and the second limiting groove 76.

[0126] Thus, the second limiting block 79 can cooperate with the second limiting groove 76, so that when the operating member 52 moves, it can drive the second sealing plate 14 to make planar movement on the first sealing plate 11.

[0127] Specifically, in the embodiments of this utility model, please refer to... Figure 5 , Figure 22 and Figure 24 The second limiting groove 76 is disposed on the surface of the second body 43 of the second sealing sheet 14 facing away from the cooking cavity 250, and the second limiting block 79 is disposed on the surface of the operating member 52 facing the cooking cavity 250. In other embodiments, the second limiting groove 76 may be disposed on the surface of the operating member 52 facing the cooking cavity 250, and the second limiting block 79 may be disposed on the surface of the second body 43 facing away from the cooking cavity 250. The second limiting block 79 can be engaged in the second limiting groove 76, so that the operating member 52 and the second sealing sheet 14 are tightly fitted, and when the operating member 52 moves, it can drive the second sealing sheet 14 to perform planar movement on the first sealing sheet 11.

[0128] This embodiment of the invention does not specifically limit the number of the second limiting groove 76 and the second limiting block 79. In one example, there are two second limiting grooves 76 and two limiting blocks 79. One second limiting block 79 is disposed in one corresponding second limiting groove 76.

[0129] In some embodiments, the operating element 52 is located on a different surface of the second sealing sheet 14 than the surface that contacts the first sealing sheet 11.

[0130] Thus, the operating element 52 can drive the second sealing plate 14 to move relative to the first sealing plate 11, so as to open and close the vent hole 17 and change the opening area of ​​the vent hole 17.

[0131] Specifically, please combine Figure 9 and Figure 25 The surface of the second sealing plate 14 that contacts the first sealing plate 11 is the upper surface of the second sealing plate 14, and the operating member 52 is located on the lower surface of the second sealing plate 14. It is understood that in other embodiments, the operating member 52 may be located on the circumferential side of the second sealing plate 14. Optionally, a portion of the operating member 52 is located inside the valve housing 32, and a portion extends out of the valve housing 32 to form an operating part. The operating part can directly cooperate with other operating elements, and during movement, it drives the second sealing plate 14 to move relative to the first sealing plate 11 to open and close the exhaust port 17, changing the opening area of ​​the exhaust port 17.

[0132] When the operating element 52 is operated, it can drive the second sealing plate 14 to move back and forth relative to the first sealing plate 11, thereby opening and closing the vent hole 17.

[0133] Optionally, the movement of the second sealing plate 14 can be achieved electrically and / or manually. Specifically, in the electrically driven mode, the lid assembly 400 may include a motor and a connector. The connector may connect the motor's output shaft and the operating element 52. When the motor moves, it drives the operating element 52 to rotate back and forth or translate back and forth through the connector, thereby causing the second sealing plate 14 to rotate back and forth or translate back and forth relative to the first sealing plate 11, to open and close the vent hole 17. In the manually driven mode, the operating element 52 may be exposed from the lid assembly 400. The user can operate the operating element 52 by hand or tool, rotating or translating it back and forth, thereby causing the second sealing plate 14 to rotate back and forth or translate back and forth relative to the first sealing plate 11, to open and close the vent hole 17.

[0134] Optionally, the operating element 52 and the second sealing plate 14 are integrally formed.

[0135] This invention does not specifically limit the shape of the operating member 52. In one example, the shape of the second operating member 52 can be a regular hexagonal prism or other regular or irregular prism.

[0136] In some embodiments, the second sealing plate 14 may block part, all, or not block the vent hole 17.

[0137] Thus, the second sealing plate 14 and the first sealing plate 11 cooperate with each other, and the degree of obstruction of the steam vent 17 can be adjusted to change the opening area of ​​the steam vent 17. The degree of obstruction of the steam vent 17 can be flexibly adjusted to change the opening area of ​​the steam vent 17, which can meet the different cooking needs of the pressure cooking appliance 500 to a certain extent.

[0138] Specifically, please combine Figures 13 to 15 When the second sealing plate 14 moves relative to the first sealing plate 11, the second sealing plate 14 can block part of the exhaust port 17, or block it completely, or not block it at all. Figure 14 In the middle, the second sealing plate 14 partially blocks 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 13 In the middle, the second sealing plate 14 completely blocks the steam vent, and the opening area of ​​the steam vent 17 is zero, which can prevent steam release and cause the internal pressure of the pressure cooker to rise rapidly; in Figure 15In this design, the second sealing plate 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 second sealing plate 14 and the first sealing plate 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 pressure cooking appliance 500 to a certain extent.

[0139] In some embodiments, the relative movement between the first sealing strip 11 and the second sealing strip 14 includes rotational movement and / or translational movement.

[0140] Thus, the relatively simple motion forms of rotation and translation make it easier for the pressure 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.

[0141] Specifically, the first sealing plate 11 and the second sealing plate 14 rotate relative to each other. Figures 13 to 15 Optionally, the second sealing plate 14 rotates counterclockwise. The first sealing plate 11 and the second sealing plate 14... Figure 13 When the first sealing plate 11 is in the middle position, the steam vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the pressure cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the second sealing plate 14 is rotated counterclockwise by a certain angle, if the first sealing plate 11 and the second sealing plate 14 are in the middle position... Figure 14 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 pressure cooking appliance 500. The pressure inside the cooking chamber 250 decreases as the area of ​​the vent 17 that is opened increases. After the second sealing plate 14 continues to rotate counterclockwise by a certain angle, as if the first sealing plate 11 and the second sealing plate 14 are in... Figure 15 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 pressure cooking appliance 500. The cooking chamber 250 is in a certain degree of pressureless state, and pressureless cooking can be carried out.

[0142] The first sealing plate 11 and the second sealing plate 14 perform relative translational movement, as follows: Figures 16 to 18 Optionally, the translation direction of the second sealing plate 14 is from left to right. The first sealing plate 11 and the second sealing plate 14 are... Figure 16When the first sealing plate 11 is in the middle position, the steam vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the pressure cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the second sealing plate 14 is moved a certain distance to the right, if the first sealing plate 11 and the second sealing plate 14 are in the middle position... Figure 17 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 pressure cooking appliance 500. The pressure inside the cooking chamber 250 decreases as the area of ​​the vent 17 that is opened increases. After the second sealing plate 14 continues to move a certain distance to the right, as the first sealing plate 11 and the second sealing plate 14 are in... Figure 18 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 pressure cooking appliance 500. The cooking chamber 250 is in a certain degree of pressureless state, and pressureless cooking can be carried out.

[0143] In some embodiments, the switching assembly 150 is provided with a steam inlet 82 and a steam outlet 85, and a steam vent 17 connects the steam inlet 82 and the steam outlet 85. The steam inlet 82 is connected to the cooking chamber 250. When the steam vent 17 is open, the steam inlet 82 is located at the bottom of the switching assembly 150, and the steam outlet 85 is located at the top of the switching assembly 150.

[0144] Thus, when the vent 17 is connected to the inlet 82 and the outlet 85, the steam in the cooking chamber 250 can escape to the outside through the inlet 82, the vent 17 and the outlet 85 in sequence, so that the pressure cooking appliance 500 can perform pressureless cooking.

[0145] Specifically, please combine Figure 7 and Figure 8 The switching assembly 150 is provided with a steam inlet 82 and a steam outlet 85. The steam inlet 82 is located at the bottom of the switching assembly 150, and the steam outlet 85 is located at the top of the switching assembly 150. Figure 7 When the vent 17 is completely blocked, it cannot connect with the steam inlet 82 and the steam outlet 85, the steam inlet 82 is completely sealed, and the steam inside the cooking cavity 250 cannot escape to the outside; Figure 8 When the vent 17 is fully opened, the vent 17 connects the steam inlet 82 and the steam outlet 85. The steam in the cooking chamber 250 can escape to the outside through the steam inlet 82, the vent 17 and the steam outlet 85 in sequence, so that the pressure cooking appliance 500 can perform pressureless cooking.

[0146] In some embodiments, the lid assembly 400 includes a fixing portion 88 provided on the side of the lid 300 facing the cooking cavity 250, and the switching assembly 150 is fixedly connected to or detachably connected to the fixing portion 88.

[0147] In this way, the switching component 150 can be stably installed on the pot lid 300, ensuring normal operation when cooking in the pressure cooking appliance 500.

[0148] Specifically, please combine Figure 3 and Figure 4 A fixing part 88 is provided below the pot lid 300, and the switching component 150 is fixedly connected to the fixing part 88 or detachably connected to it. Optionally, the switching component 150 and the fixing part 88 can be permanently connected together by means including but not limited to welding, bonding, riveting, etc., so that the switching component 150 can maintain high stability; alternatively, the switching component 150 and the fixing part 88 can be detachably connected together by means of bolts, pins, buckles, etc., so that the switching component 150 is easy to maintain and replace parts. In this embodiment of the utility model, the switching component 150 and the fixing part 88 are detachably connected. The connection method of the switching component 150 and the fixing part 88 can be specifically defined according to actual needs.

[0149] The present invention does not specifically limit the manufacturing process of the fixing part. In one example, the fixing part may be manufactured by means of thread fixing, riveting fixing, welding fixing or integral casting with the pot lid.

[0150] In some embodiments, the fixing part 88 is provided with a fixing post 91, and the switching component 150 is provided with a mounting hole 94. The switching component 150 is connected to the fixing part 91 by fasteners 97 passing through the mounting hole 94.

[0151] Thus, the fastener 97, through the mounting hole 94 and fixedly connected to the fixing post 91, allows the switching assembly 150 to be stably placed on the pot lid 300, reducing the risk of movement or tilting during transportation or use to a certain extent.

[0152] Specifically, please combine Figure 3The fixing part 88 is provided with a fixing post 91, and the switching assembly 150 is provided with a mounting hole 94. The switching assembly 150 is first positioned by corresponding the fixing post 91 through the mounting hole 94, and then the fixing post 91 is passed through the mounting hole 94. This allows for precise determination of the position of the switching assembly 150 on the fixing part 88. Then, the fastener 97 is passed through the mounting hole and connected to the fixing post 91. This allows the mounting hole 94 and the fixing post 91 to be fixedly connected, ensuring that the switching assembly 150 is stably placed on the pot lid 300, reducing the risk of movement or tilting during transportation or use to a certain extent. The fastener 97 includes, but is not limited to, screws, bolts, rivets, etc. Optionally, in Figure 3 In the middle, the fastener 97 is a screw, which makes the switching assembly 150 detachably connected to the fixing part 88.

[0153] This embodiment of the invention does not specifically limit the number of fixing posts 91, mounting holes 94, and fasteners 97. In one example, there are three fixing posts 91, three mounting holes 94, and three fasteners 97. One fixing post 91 corresponds to one mounting hole 94, and also corresponds to one fastener 97.

[0154] In some embodiments, one of the fixing part 88 and the switching assembly 150 is provided with a screw hole 100, and the other is provided with a stud 103. The fixing part 88 and the switching assembly 150 are connected by the stud 103 and the screw hole 100 cooperating with each other.

[0155] Thus, the stud 103 and the screw hole 100 cooperate with each other to connect the switching assembly 150 and the fixing part 88, which has the flexibility and maintainability of connection.

[0156] Specifically, one of the fixing part 88 and the switching assembly 150 is provided with a screw hole 100, and the other is provided with a stud 103. Please refer to... Figure 4 In this embodiment of the invention, the fixing part 88 is provided with a screw hole 100, and the switching component 150 is provided with a stud. The fixing part 88 and the switching component 150 are connected by the stud 103 cooperating with the screw hole 100. In other embodiments, the fixing part 88 may be provided with a stud 103, and the switching component 150 may be provided with a screw hole.

[0157] In an optional embodiment, the first sealing sheet 11 is provided with a first guide portion 106, and the second sealing sheet 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 first sealing sheet 11 and the second sealing sheet 14.

[0158] Thus, the first guide part 106 and the second guide part 109 cooperate and connect to guide the second sealing plate 14 to make relative planar movement to the first sealing plate 11, making it easier to change the opening area of ​​the exhaust hole 17.

[0159] Specifically, please combine Figure 19 and Figure 20 A first guide portion 106 is provided at the middle position of the first sealing plate 11, and a second guide portion 109 is provided at the corresponding position of the second sealing plate 14. 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 second sealing plate 14 to perform relative planar movement to the first sealing plate 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 in the groove.

[0160] When the first sealing plate 11 and the second sealing plate 14 are in Figure 19 When the first sealing plate 11 is in the middle position, the steam vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the pressure cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the second sealing plate 14 moves a certain distance, when the first sealing plate 11 and the second sealing plate 14 are in the middle position... Figure 20 In the cooking chamber 250, the vent 17 is not obstructed, allowing the cooking chamber 250 to communicate with the outside world through the vent 17. Most of the steam inside the cooking chamber 250 can escape from the pressure cooking appliance 500, and the cooking chamber 250 is in a partially pressureless state, enabling pressureless 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.

[0161] In some implementations, please refer to Figure 2 The pot lid assembly 400 includes a cover plate 109 and a fixing part 88 disposed on the side of the pot lid 300 facing the cooking cavity 250. The cover plate 109 is fixedly connected to or detachably connected to the switching assembly 150 and the fixing part 88.

[0162] In this way, the connection between the pot lid and the switching component can be achieved through the cover plate, thereby reducing the space occupied by the pressureless switching device inside the pot lid.

[0163] In this embodiment of the utility model, such as Figure 2 As shown, the cover plate 109 is located on the side of the pot lid 300 facing the cooking cavity 250, and the cover plate 109 is connected to the switching assembly 150. Please further combine Figures 27 to 29The cover plate 109 includes a fixing member 112. The cover plate 109 can be connected to a fixing seat 88 located on the side of the pot lid facing the cooking cavity via the fixing member 112. The cover plate 109 can also be connected to a switching assembly 150. The connection between the fixing member 112 and the fixing seat 88, and between the cover plate 109 and the switching assembly 150, can be either fixed or detachable. Specifically, the fixing member 88 has mounting holes corresponding to the mounting holes 94 on the valve housing 32, and the mounting holes 94 and the mounting holes can be fastened together with screws. The fixing member 112 and the cover plate 109 can be integrally formed or detachably connected.

[0164] Optionally, the pressure cooking appliance 500 includes a second sealing ring 118 for ensuring a tight fit between the lid and the pot lid.

[0165] Optionally, the pressure cooking appliance 500 includes a handle 115, which is connected to an operating element 52 so that the user can control the operating element 52 via the handle 115.

[0166] Optionally, the switching component 150 can be located at any position on the side of the cover 109 facing the cooking cavity 250, for example, it can be located at the center of the side or at the periphery of the side.

[0167] In one implementation, please refer to Figure 10 and 13 The second sealing plate 14 can close the vent 17 to seal the cooking chamber 250, preventing steam from escaping from the pressure cooking appliance 500, and maintaining the pressure within the cooking chamber 250 at the level required for cooking. Figure 14 In this process, the second sealing plate 14 can open a portion of the vent hole 17, allowing the cooking chamber 250 to communicate with the outside through the vent hole 17. A portion of the steam inside the cooking chamber 250 can escape from the pressure cooking appliance 500, and the pressure inside the cooking chamber 250 decreases as the area of ​​the vent hole 17 that is opened increases. Please refer to... Figure 11 and Figure 15 The second sealing plate 14 can fully open the steam vent 17 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 pressure cooking appliance 500. The cooking chamber 250 is in a pressureless state to a certain extent, and pressureless cooking can be carried out.

[0168] In one implementation, please refer to Figure 12 and Figure 25The surface of the second sealing plate 14 that contacts the first sealing plate 11 is the upper surface of the second sealing plate 14, and the operating member 52 is located on the lower surface of the second sealing plate 14. It is understood that in other embodiments, the operating member 52 may be located on the circumferential side of the second sealing plate 14. Optionally, a portion of the operating member 52 is located inside the valve housing 32, and a portion extends out of the valve housing 32 to form an operating part. The operating part can directly cooperate with other operating elements, and during movement, it drives the second sealing plate 14 to move relative to the first sealing plate 11 to open and close the exhaust port 17, changing the opening area of ​​the exhaust port 17.

[0169] In some embodiments, the pressure cooking appliance 500 satisfies at least one of the following: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; the first sealing plate 11 and the second sealing plate 14 are made of hard materials with a Vickers hardness greater than or equal to 50 HV5; the surface roughness of the first contact plane 26 where the first sealing plate 11 and the second sealing plate 14 contact each other 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 where the second sealing plate 14 and the first sealing plate 11 contact each other is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers.

[0170] In this way, the pressure cooking appliance 500 can be guaranteed to switch between pressure cooking and non-pressure cooking to a certain extent.

[0171] Specifically, in one embodiment, the pressure cooking appliance 500 satisfies that the steam vent area of ​​the vent 17 is greater than or equal to 19.5 mm² and less than or equal to 314 mm². In one embodiment, the pressure cooking appliance 500 satisfies that the materials of the first sealing plate 11 and the second sealing plate 14 are hard materials, and the Vickers hardness of the hard materials is greater than or equal to 50 HV5. In one embodiment, the pressure cooking appliance 500 satisfies that the surface roughness of the first contact surface 26 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 surface 29 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers.

[0172] In one embodiment, the pressure cooking appliance 500 satisfies the following conditions: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; and the first sealing plate 11 and the second sealing plate 14 are made of hard materials with a Vickers hardness greater than or equal to 50 HV5. In another embodiment, the pressure cooking appliance 500 satisfies the following conditions: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; and the surface roughness and flatness of the first contact surface 26 and the second contact surface 29 are both less than or equal to 3.2 micrometers. In yet another embodiment, the pressure cooking appliance 500 satisfies the following conditions: the first sealing plate 11 and the second sealing plate 14 are made of hard materials with a Vickers hardness greater than or equal to 50 HV5; and the surface roughness and flatness of the first contact surface 26 and the second contact surface 29 are both less than or equal to 3.2 micrometers.

[0173] In one embodiment, the pressure cooking appliance 500 simultaneously satisfies the following conditions: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; the first sealing plate 11 and the second sealing plate 14 are made of hard materials with a Vickers hardness greater than or equal to 50 HV5; the surface roughness of the first contact plane 26 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.

[0174] Please combine Figures 13 to 15The vent 17 is located on the first sealing plate 11, which is fixed. The second sealing plate 14 is movable, moving relative to the first sealing plate 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 pressure cooker 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 pressure cooker 500. If the vent area of ​​the vent 17 is too large, the required size of the switching component 150 becomes too large, increasing manufacturing costs. Therefore, an appropriate vent area for the vent 17 ensures that the pressure cooker 500 can quickly reach and maintain a pressure-free state during high-power cooking, thereby improving cooking efficiency. In this embodiment of the invention, the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm², which allows the pressure cooking appliance 500 to remain in a pressure-free state when operating at high power (so that the pressure inside the cooking cavity 250 can be less than 1 kPa), thus providing a rapid and uniform heating effect for food to a certain extent.

[0175] 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 mm² and less than or equal to 314 mm², that is, 19.5 mm² ≤ S ≤ 314 mm². In some examples, S = 19.5 mm², 49 mm², 78.5 mm², 108 mm², 137.5 mm², 167 mm², 196.5 mm², 226 mm², 255.5 mm², 285 mm², 314 mm², or other values ​​greater than or equal to 19.5 mm² and less than or equal to 314 mm².

[0176] When the pressure cooker 500 is in operation, especially in pressurized cooking mode, significant pressure is generated inside the cooking chamber 250. This high pressure acts on the two sealing plates. Therefore, the materials of the first sealing plate 11 and the second sealing plate 14 can be made of rigid 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 rigid material is greater than or equal to 50HV5.

[0177] This invention does not specifically limit the materials of the first sealing sheet 11 and the second sealing sheet 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 first sealing sheet 11 and the second sealing sheet 14 have a Vickers hardness greater than or equal to 50HV5, exhibiting good wear resistance and the ability to resist friction and abrasion. Simultaneously, they possess strong compressive strength, capable of withstanding significant pressure without deformation or damage.

[0178] For hard materials, the Vickers hardness H is greater than or equal to 50HV5, that is, H≥50HV5. In some cases, 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 sealing sheet.

[0179] Specifically, please combine Figures 13 to 15 The first sealing plate 11 and the second sealing plate 14 are stacked together, 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 and the second contact surface 29 are tightly fitted together, forming a sealing effect at the contact surface. Simultaneously, the second sealing plate 14 moves planarly on the first sealing plate 11, opening or closing the vent 17. To ensure smoother relative movement between the first sealing plate 11 and the second sealing plate 14, and to achieve a better sealing effect between the first contact surface 26 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 for the pressure cooking appliance 500 to switch between pressure cooking and non-pressure cooking to a certain extent.

[0180] In this embodiment of the invention, the surface roughness of the first contact plane 26 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 first sealing plate 11 and the second sealing plate 14 smoother, and making the first contact plane 26 and the second contact plane 29 form a better sealing effect.

[0181] 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.

[0182] Optionally, the surface roughness and flatness of the first contact plane 26 may be the same as or different from the surface roughness and flatness of the second contact plane 29.

[0183] 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.

[0184] 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 pressure cooking appliance, characterized in that, include: A pot lid assembly, the pot lid assembly including a pot lid and a switching component; A pot body, the pot body being connected to the pot lid, a cooking cavity being formed inside the pot body, the pot lid covering the cooking cavity, and a switching component being located on the side of the pot lid facing the cooking cavity; The switching assembly includes an operating element, a first sealing plate, and a second sealing plate, which are movably connected. The first sealing plate has a vent hole. The operating element is connected to either the first or the second sealing plate. The switching assembly is configured to cause relative movement between the first and second sealing plates when the operating element is operated, thereby closing the vent hole to seal the cooking cavity and opening the vent hole to allow the cooking cavity to communicate with the outside through the vent hole.

2. The pressure cooking appliance according to claim 1, characterized in that, The vent area of ​​the vent hole is configured such that when the vent hole is open, the pressure cooking appliance can achieve pressureless cooking.

3. The pressure cooking appliance according to claim 2, characterized in that, The switching component is configured such that the first sealing plate and the second sealing plate can move relative to each other to adjust the opening area of ​​the vent hole.

4. The pressure cooking appliance according to claim 1, characterized in that, The first sealing sheet and the second sealing sheet are movably connected, with the second sealing sheet being closer to the cooking cavity than the first sealing sheet.

5. The pressure cooking appliance according to claim 1, characterized in that, The first sealing sheet includes a first contact plane, and the second sealing sheet 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 first sealing plate and the second sealing plate 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 pressure cooking appliance according to claim 5, characterized in that, The second sealing plate is capable of planar movement relative to the first sealing plate 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 second sealing plate.

7. The pressure cooking appliance according to claim 6, characterized in that, The second sealing sheet has a notch. When the notch is connected to the vent hole in the vertical direction, the switching component opens the vent hole. When the notch is not connected to the vent hole in the vertical direction, the switching component closes the vent hole.

8. The pressure cooking appliance according to claim 1, characterized in that, The switching assembly includes a valve housing and a sealing gasket. The valve housing has a receiving cavity, and the first sealing plate and the second sealing plate are disposed in the receiving cavity. 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 side of the pot lid facing the cooking cavity through the sealing gasket. The operating member extends into the receiving cavity through the second opening and is connected to the second sealing plate. When the vent is open, the cooking cavity communicates with the outside of the cooking cavity through the vent and the second opening.

9. The pressure cooking appliance according to claim 8, characterized in that, One of the sidewalls of the accommodating cavity and the first sealing sheet is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block is disposed in the first limiting groove so that the valve body limits the first sealing sheet.

10. The pressure cooking appliance according to claim 8, characterized in that, The switching assembly includes a first sealing ring, a first abutting surface is provided on the outer side of the operating member, and a second abutting surface is provided on the inner side of the valve housing facing the accommodating cavity. The first abutting surface and the second abutting surface abut against each other through the first sealing ring.

11. The pressure cooking appliance according to claim 10, characterized in that, The second contact surface is provided with a receiving groove, and a portion of the first sealing ring is received in the receiving groove.

12. The pressure cooking appliance according to claim 8, characterized in that, One of the second sealing sheet and the operating member is provided with a second limiting groove, and the other is provided with a second limiting block. The second limiting block is disposed in the second limiting groove so that when the operating member moves, the second sealing sheet is driven to move through the cooperation of the second limiting block and the second limiting groove.

13. The pressure cooking appliance according to claim 4, characterized in that, The operating element is located on a surface of the second sealing sheet that is different from the surface that contacts the first sealing sheet.

14. The pressure cooking appliance according to claim 6, characterized in that, The second sealing plate can block part of the vent hole, or block all of it, or not block the vent hole at all.

15. The pressure cooking appliance according to claim 14, characterized in that, The relative movement between the first sealing plate and the second sealing plate includes rotational movement and / or translational movement.

16. The pressure cooking appliance according to claim 1, characterized in that, The switching assembly has a steam inlet and a steam outlet. The steam inlet is connected to the cooking chamber. When the steam vent is open, the steam vent is connected to the steam inlet and the steam outlet. The steam inlet is located at the bottom of the switching assembly, and the steam outlet is located at the top of the switching assembly.

17. The pressure cooking appliance according to claim 1, characterized in that, The pot lid assembly includes a fixing part disposed on the side of the pot lid facing the cooking cavity, and the switching assembly is fixedly connected to or detachably connected to the fixing part.

18. The pressure cooking appliance according to claim 17, characterized in that, The fixing part is provided with a fixing post, and the switching component is provided with a mounting hole. The switching component is connected to the fixing part by fasteners passing through the mounting hole.

19. The pressure cooking appliance according to claim 17, characterized in that, One of the fixing part and the switching component is provided with a screw hole, and the other is provided with a stud. The fixing part and the switching component are connected by the stud and the screw hole cooperating with each other.

20. The pressure cooking appliance according to claim 17, characterized in that, The pot lid assembly includes a lid plate and a fixing part disposed on the side of the pot lid facing the cooking cavity. The lid plate is fixedly connected to or detachably connected to the switching assembly and the fixing part.

21. The pressure cooking appliance according to claim 5, characterized in that, The pressure cooking appliance satisfies at least one of the following: the steam vent area is greater than or equal to 19.5 mm² and less than or equal to 314 mm²; The first sealing sheet and the second sealing sheet 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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