Pressure cooking utensil

Abstract

The utility model relates to a pressure cooking utensil. The pressure cooking utensil comprises a cooking cavity and a switching assembly, the switching assembly comprises a first sealing piece and a second sealing piece which are movably connected, the first sealing piece comprises a first contact surface, the second sealing piece comprises a second contact surface, and the first contact surface and the second contact surface are in a non-planar shape. The first contact surface and the second contact surface are matched in shape, so that the first sealing element and the second sealing element form surface contact through close contact of the first contact surface and the second contact surface, and the first sealing element is provided with a steam exhaust hole; the switching assembly is configured to close the steam exhaust hole to seal the cooking cavity through close contact of the first contact surface and the second contact surface when the first sealing piece and the second sealing piece move relatively, and can open the steam exhaust hole to communicate the cooking cavity with the outside through the steam exhaust hole. According to the pressure cooking utensil, non-pressure switching can be achieved through relative movement of the first contact face and the second contact face.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance technical field, especially relate to a pressure cooking utensil. BACKGROUND

[0002] The current pressure cooker is separated from the exhaust valve core through the gravity exhaust valve (such as gravity hammer, gravity valve) in the pressureless mode, and the exhaust is realized by the exhaust hole in the exhaust valve core to realize pressureless; but because the exhaust hole of the pressure cooker is very small, the exhaust capacity is not enough (if the exhaust hole is directly made large on this basis, the weight and volume of the gravity exhaust valve will also increase greatly considering the sealing of the exhaust hole under high pressure, and it is very difficult to operate and switch and realize productization), the power during cooking will be greatly reduced to avoid generating a large amount of steam, which cannot be released in time to start pressure, which will greatly prolong the cooking speed and experience is very bad. SUMMARY

[0003] The utility model embodiment provides a pressure cooking utensil to solve at least one of the above technical problems.

[0004] The utility model embodiment provides a pressure cooking utensil, which comprises:

[0005] A pot cover assembly, the pot cover assembly comprises a pot cover and a switching assembly, and the switching assembly is arranged on the pot cover;

[0006] A pot body, the pot body is connected with the pot cover, the pot body is formed with a cooking cavity, and the pot cover covers the cooking cavity;

[0007] The switching assembly comprises a first sealing member and a second sealing member connected movably, the first sealing member comprises a first contact surface, the second sealing member comprises a second contact surface, the first sealing member is provided with an exhaust hole, the first contact surface and the second contact surface are in a non-planar shape, and the shapes of the first contact surface and the second contact surface are matched to form surface contact of the first sealing member and the second sealing member through the close contact of the first contact surface and the second contact surface, the switching assembly is configured to close the exhaust hole to seal the cooking cavity and open the exhaust hole to communicate the cooking cavity with the outside of the cooking cavity through the exhaust hole by the close contact of the first contact surface and the second contact surface when the first sealing member and the second sealing member move relative to each other;

[0008] The exhaust area of the exhaust hole is configured to realize pressureless cooking of the pressure cooking utensil when the exhaust hole is opened.

[0009] The pressure cooking utensil can switch between pressure cooking and non-pressure cooking through relative movement between the first contact surface of the first sealing piece and the second contact surface of the second sealing piece, thereby meeting the exhaust demand of the pressure cooking utensil under non-pressure cooking, achieving non-pressure cooking without reducing the power of the pressure cooking utensil, and improving the user experience.

[0010] In some embodiments, the non-planar surface includes at least one of a conical surface, a frustum lateral surface, an arc surface, a sawtooth surface, and a square wave surface.

[0011] In the pressure cooking utensil, the first sealing piece and the second sealing piece can be in close contact, so that the steam in the cooking cavity cannot escape between the first contact surface and the second contact surface.

[0012] In some embodiments, the switching assembly is configured to adjust the opening area of the exhaust hole through relative movement of the first sealing piece and the second sealing piece.

[0013] In the pressure cooking utensil, the opening area of the exhaust hole can be adjusted to adjust the pressure in the cooking cavity.

[0014] In some embodiments, the first sealing piece and the second sealing piece are arranged in layers, and the first sealing piece is closer to the cooking cavity than the second sealing piece.

[0015] In the pressure cooking utensil, the first sealing piece and the second sealing piece arranged in layers can reduce the space occupied by the sealing piece on the lid assembly, making the switching assembly more compact.

[0016] In some embodiments, the second sealing piece can rotate relative to the first sealing piece on the first contact surface, and the opening of the exhaust hole on the first contact surface is located on the movement path of the second sealing piece.

[0017] In the pressure cooking utensil, the relative movement of the first sealing piece and the second sealing piece can open or close the exhaust hole, adjust the exhaust area of the exhaust hole to adjust the pressure in the cooking cavity, so that the pressure cooking utensil can flexibly adjust the internal pressure according to different cooking requirements, and to a certain extent, the cooking efficiency and safety are enhanced.

[0018] In some embodiments, the second sealing piece includes a second body provided with a notch, when the notch and the exhaust hole are in communication in the up-down direction, the switching assembly opens the exhaust hole, and when the notch and the exhaust hole are not in communication in the up-down direction, the switching assembly closes the exhaust hole.

[0019] The gap and the steam vent are matched to adjust the steam vent area of the steam vent to adjust the communication degree between the cooking cavity and the outside, so that the pressure cooking utensil can flexibly adjust the pressure inside the cooking cavity according to different cooking requirements.

[0020] In some embodiments, the switching assembly comprises a valve shell and a sealing gasket, the valve shell is internally provided with a receiving cavity, the first sealing member and the second sealing member are arranged in the receiving cavity, two ends of the receiving cavity are respectively provided with a first opening and a second opening, the sealing gasket is arranged at the first opening, and the switching assembly is sealingly connected to the pot cover through the sealing gasket. When the steam vent is open, the cooking cavity is in communication with the outside of the cooking cavity through the steam vent and the second opening.

[0021] In the pressure cooking utensil, the sealing gasket can seal the interface between the switching assembly and the pot cover, prevent steam from leaking out of the gap between the switching assembly and the pot cover, and affect the cooking effect.

[0022] In some embodiments, one of the side wall of the receiving cavity and the first sealing member is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block is arranged in the first limiting groove to limit the first sealing member by the valve shell.

[0023] In the pressure cooking utensil, the first limiting block and the first limiting groove can be matched with each other, so that the valve shell can limit the movement of the first sealing member.

[0024] In some embodiments, the switching assembly comprises an operating valve core, the operating valve core is partially arranged in the valve shell, the operating valve core is connected to the second sealing member, the operating valve core comprises a first operating part which protrudes out of the valve shell from the second opening, and the first operating part is configured to move the second sealing member relative to the first sealing member to open and close the steam vent when the first operating part moves.

[0025] In the pressure cooking utensil, the first operating part can drive the second sealing member to move relative to the first sealing member when the first operating part moves, so as to open and close the steam vent, change the steam vent area of the steam vent, and realize the switching between the pressure state and the non-pressure state during cooking of the pressure cooking utensil.

[0026] In some embodiments, the switching assembly comprises a sealing ring, the outer side surface of the operating valve core is provided with a first abutting surface, the inner side surface of the valve shell facing the receiving cavity is provided with a second abutting surface, and the first abutting surface and the second abutting surface abut through the sealing ring.

[0027] The sealing ring can seal the connection between the operation valve core and the valve shell, prevent steam from leaking out of the gap between the operation valve core and the valve shell in the pressureless cooking mode, and affect the cooking effect.

[0028] In some embodiments, the first abutting surface is provided with a first accommodating groove, the second abutting surface is provided with a second accommodating groove, and a part of the sealing ring is accommodated in the first accommodating groove and another part of the sealing ring is accommodated in the second accommodating groove.

[0029] The mutual cooperation of the first accommodating groove and the second accommodating groove can ensure that the sealing ring is accurately placed and prevent the displacement of the sealing ring from affecting the operation.

[0030] In some embodiments, the second sealing member includes a second body, the second body is provided with a second limiting groove on one of the operation valve core and the second body, and the other is provided with a second limiting block, and the second limiting block is arranged in the second limiting groove, so that when the first operation part moves, the second limiting block and the second limiting groove cooperate to drive the second sealing member to move.

[0031] The mutual cooperation of the second limiting block and the second limiting groove can drive the second sealing member to rotate on the first sealing member when the operation valve core moves.

[0032] In some embodiments, the second sealing member includes a second body and a second operation part, the second body includes a second contact surface, the second operation part is arranged on another surface of the second body different from the surface of the second contact surface, and the second operation part is configured to move to drive the second sealing member to move relative to the first sealing member to open and close the steam exhaust hole.

[0033] The second operation part can directly cooperate with other operation members to drive the second sealing member to move relative to the first sealing member to open and close the steam exhaust hole and change the opening area of the steam exhaust hole.

[0034] In some embodiments, the second sealing member can block a part of the steam exhaust hole, all of the steam exhaust hole, and none of the steam exhaust hole.

[0035] The mutual cooperation of the second sealing member and the first sealing member can adjust the blocking degree of the steam exhaust hole to change the opening area of the steam exhaust hole, and can flexibly adjust the blocking degree of the steam exhaust hole to change the opening area of the steam exhaust hole, to a certain extent, to meet different cooking requirements of the pressure cooking utensil.

[0036] In some embodiments, the relative movement of the first sealing member and the second sealing member includes rotational movement and / or translational movement.

[0037] In the pressure cooking appliance, the relatively simple movement form of the rotating movement and the translational movement can make the pressure cooking appliance switch between the pressure state and the non-pressure state more simply, and make the maintenance and replacement of the switching assembly more convenient.

[0038] In some embodiments, the pressure cooking appliance comprises a float assembly, which is arranged on the pot cover.

[0039] In the pressure cooking appliance, the float assembly can reflect the pressure change in the cooking cavity in real time.

[0040] In some embodiments, the pressure cooking appliance comprises a pressure relief assembly and a float assembly, which are arranged on the pot cover, and the pressure relief assembly is configured to, when the pressure in the cooking cavity is greater than or equal to a safety pressure, make the cooking cavity communicate with the outside of the cooking cavity through the pressure relief assembly, and when the pressure in the cooking cavity is less than the safety pressure, make the cooking cavity not communicate with the outside of the cooking cavity through the pressure relief assembly.

[0041] In the pressure cooking appliance, the safety of the pressure cooking appliance can be further improved.

[0042] In some embodiments, the pressure cooking appliance comprises a pressure limiting assembly, which is arranged on the pot cover, and the pressure limiting assembly is configured to, when the pressure in the cooking cavity is greater than or equal to a set pressure, make the cooking cavity communicate with the outside of the cooking cavity through the pressure limiting assembly, and when the pressure in the cooking cavity is less than the set pressure, make the cooking cavity not communicate with the outside of the cooking cavity through the pressure limiting assembly.

[0043] In the pressure cooking appliance, the safety and reliability of the pressure cooking appliance can be ensured to a certain extent.

[0044] In some embodiments, the pressure cooking appliance satisfies at least one of the following conditions:

[0045] The steam exhaust area of the steam exhaust hole is greater than or equal to 19.5 mm 2 and less than or equal to 314 mm 2 ;

[0046] The material of the first sealing member and the second sealing member is a hard material, and the Vickers hardness of the hard material is greater than or equal to 50 HV5;

[0047] The surface roughness of the first contact surface of the first seal in contact with the second seal is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns; the surface roughness of the second contact surface of the second seal in contact with the first seal is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns.

[0048] In the pressure cooking utensil, the switching effect between pressure cooking and non-pressure cooking of the pressure cooking utensil can be ensured to a certain extent.

[0049] The additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0050] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of the embodiments of the present application, taken in conjunction with the accompanying drawings.

[0051] Figure 1 is a structural schematic view of a pressure cooking utensil of the embodiments of the present application;

[0052] Figure 2 is another structural schematic view of a pressure cooking utensil of the embodiments of the present application;

[0053] Figure 3 is still another structural schematic view of a pressure cooking utensil of the embodiments of the present application;

[0054] Figure 4 is an exploded schematic view of a pot cover assembly of the embodiments of the present application;

[0055] Figure 5 is another exploded schematic view of a pot cover assembly of the embodiments of the present application;

[0056] Figure 6 is an exploded view of a switching assembly of the embodiments of the present application;

[0057] Figure 7 is a sectional schematic view of a pressure cooking utensil of the embodiments of the present application in a pressure state;

[0058] Figure 8 is a sectional schematic view of a pressure cooking utensil of the embodiments of the present application in a non-pressure state;

[0059] Figure 9 is a sectional schematic view of a float assembly of the embodiments of the present application;

[0060] Figure 10 is a sectional schematic view of a float assembly of the embodiments of the present application;

[0061] Figure 11 is a structural schematic view of the first sealing member and the second sealing member in a pressure state according to the embodiment of the present application;

[0062] Figure 12 is a structural schematic view of the first sealing member and the second sealing member in a pressure switching state according to the embodiment of the present application;

[0063] Figure 13 is a structural schematic view of the first sealing member and the second sealing member in a pressure-free state according to the embodiment of the present application;

[0064] Figure 14 is a structural schematic view of the valve shell according to the embodiment of the present application;

[0065] Figure 15 is a structural schematic view of the operating valve core according to the embodiment of the present application;

[0066] Figure 16 is a structural schematic view of the second sealing member according to the embodiment of the present application;

[0067] Figure 17 is another structural schematic view of the second sealing member according to the embodiment of the present application;

[0068] Figure 18 is a structural schematic view of the first sealing member according to the embodiment of the present application;

[0069] Figures 19 to 21 is a structural schematic view of the first contact surface and the second contact surface according to the embodiment of the present application;

[0070] Figure 22 is a relationship diagram of the steam exhaust area of the steam exhaust hole and the power of the pressure cooking appliance according to the embodiment of the present application.

[0071] Main component symbol explanation:

[0072] first seal-11, second seal-14, steam vent-17, second body-20, notch-23, first contact surface-26, second contact surface-29, valve housing-32, gasket-35, receiving cavity-38, first opening-41, second opening-43, first limit slot-46, first limit block-49, operating valve core-52, first operating portion-55, second operating portion-58, sealing ring-61, first abutment surface-64, second abutment surface-67, first receiving slot-70, second receiving slot-73, second limit slot-76, second limit block-79, steam inlet-82, steam outlet-85, fixed portion-88, fixed column-91, mounting hole-94, fastener-97, threaded hole-100, threaded column-103, switching assembly-150, pot body-200, cooking cavity-250, pot cover-300, float assembly-330, float-331, steam discharge channel-334, pressure relief assembly-360, pressure relief valve-361, pressure relief lever-364, pressure relief button-367, pressure limiting assembly-390, pressure limiting valve-391, pot cover assembly-400, pressure cooking appliance-500. DETAILED DESCRIPTION

[0073] The embodiments of the present application will be described in detail below with reference to the drawings, examples of which are shown in the drawings. The same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below by reference to the drawings are exemplary and are for the purpose of explaining the present application and should not be construed as limiting the present application.

[0074] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0075] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, the term "installation", "connection", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected. Can be mechanical connection, also can be electrical connection. Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element interaction relationship. For ordinary skilled in the art, the above-mentioned terms in the utility model can be understood according to the specific meaning of the specific circumstances.

[0076] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but through the contact between other features between them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.

[0077] The disclosure herein provides many different implementations or examples to realize the different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described herein. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeatedly refer to numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0078] Please refer to Figures 1 to 6The utility model provides a pressure cooking utensil 500 including a pot cover assembly 400 and a pot body 200. The pot cover assembly 400 includes a pot cover 300 and a switching assembly 150, and the switching assembly 150 is arranged on the pot cover 300. The pot body 200 is connected to the pot cover 300, and a cooking cavity 250 is formed in the pot body 200. The pot cover 300 covers the cooking cavity 250. The switching assembly 150 includes a first sealing element 11 and a second sealing element 14 connected movably. The first sealing element 11 includes a first contact surface 26, and the second sealing element 14 includes a second contact surface 29. The first contact surface 26 and the second contact surface 29 are non-planar in shape. The first contact surface 26 and the second contact surface 29 are adapted in shape to form a surface contact through the close contact of the first contact surface 26 and the second contact surface 29. The first sealing element 11 is provided with a steam vent hole 17. When the first sealing element 11 and the second sealing element 14 move relative to each other, the switching assembly 150 can close the steam vent hole 17 through the close contact of the first contact surface 26 and the second contact surface 29 to seal the cooking cavity 250, and can open the steam vent hole 17 to make the cooking cavity 250 communicate with the outside of the cooking cavity 250 through the steam vent hole 17.

[0079] The steam vent area of the steam vent hole 17 is configured to enable the pressure cooking utensil 500 to realize pressureless cooking when the steam vent hole 17 is open.

[0080] In the pressure cooking utensil 500, the relative movement between the first contact surface 26 of the first sealing element 11 and the second contact surface 29 of the second sealing element 14 can meet the steam exhaust demand of the pressure cooking utensil 500 under pressureless cooking. The pressure cooking utensil 500 can realize pressureless cooking without reducing the power, thereby improving the user experience.

[0081] Specifically, in the utility model embodiment, the pressure cooking utensil 500 can work in pressure cooking and pressureless cooking. In pressure cooking, the switching assembly 150 can close the steam vent hole 17 to seal the cooking cavity 250, so that the food material can be cooked under pressure. In pressureless cooking, the switching assembly 150 can open the steam vent hole 17 to make the cooking cavity 250 communicate with the outside of the cooking cavity 250, so that the food material can be cooked without pressure.

[0082] It should be noted that the pressureless cooking of the utility model refers to the pressure in the cooking cavity 250 when the pressure cooking appliance 500 is working is less than or equal to 4kPa. The steam exhaust area of the steam exhaust hole 17 can be understood as the opening area of the steam exhaust hole 17. In an embodiment, when the steam exhaust hole 17 is fully opened, the steam exhaust area of the steam exhaust hole 17 is used for steam exhaust, and the pressure cooking appliance 500 can realize pressureless cooking. In an embodiment, when the steam exhaust hole 17 is partially opened, part of the steam exhaust area of the steam exhaust hole 17 can be used for steam exhaust, and the pressure cooking appliance 500 can realize pressureless cooking.

[0083] When the steam exhaust hole 17 is opened to a certain size (fully or partially), the steam exhaust area of the steam exhaust hole 17 that enables the pressure cooking appliance 500 to realize pressureless cooking is related to the power of the pressure cooking appliance 500. Generally, the greater the power of the pressure cooking appliance 500, the greater the steam exhaust area of the steam exhaust hole 17 required for pressureless cooking. The steam exhaust area of the steam exhaust hole 17 corresponding to the power of the pressure cooking appliance 500 under pressureless cooking can be determined by simulation, testing, empirical value, etc. In some examples, please refer to Figure 22 , Figure 22 The corresponding relationship between the steam exhaust area of the steam exhaust hole 17 and the power of the pressure cooking appliance 500 under pressureless cooking (the pressure in the cooking cavity 250 is 4KPa) is shown.

[0084] The pressure cooking appliance 500 includes but is not limited to a pressure cooker, an electric pressure cooker, a high-pressure cooker, a pressure slow cooker, etc. Please refer to Figures 1 to 3 , The pressure cooking appliance 500 includes a pot cover 300, a pot body 200, and a cooking cavity 250. When the pot cover 300 and the pot body 200 are closed, they can be tightly matched through a sealing ring to form a relatively closed cooking cavity 250 inside. When the steam exhaust hole 17 is closed, the pressure cooking appliance 500 starts to work, the food in the cooking cavity 250 is heated, the water in the cooking cavity 250 starts to evaporate, the generated steam gradually increases, and the pressure in the cooking cavity 250 also gradually rises. Since the cooking cavity 250 is sealed at this time, the steam cannot escape outside the pressure cooking appliance 500, so the pressure in the cooking cavity 250 is maintained, thereby increasing the boiling point of water to achieve the purpose of accelerating cooking.

[0085] In order to provide more cooking options and flexibility, meet different food and cooking needs, the pressure cooking utensil 500 will generally add a non-pressure cooking mode. In the related art, most of the pressure cookers with non-pressure cooking mode are to open the existing gravity steam valve (such as gravity hammer, gravity valve) by mechanism in non-pressure cooking mode, so that the gravity steam valve is separated from the steam valve core, and the steam is discharged through the steam hole in the steam valve core to realize non-pressure. However, due to the small area of the steam hole of the pressure cooking utensil, the steam discharge amount is not enough, and the power during cooking is greatly reduced to avoid generating a large amount of steam, which cannot be released in time to pressurize, which greatly prolongs the cooking speed and the user experience is very poor. If the area of the steam hole is directly increased on this basis, considering that the weight and volume of the gravity steam valve will also be greatly increased to press the steam hole for sealing under high pressure, it is very laborious to operate and switch, and it is difficult to realize productization. Therefore, the existing pressure cooking utensil cannot perform non-pressure cooking, or the power of non-pressure cooking is very small, and the power is slightly larger, which cannot maintain the non-pressure state. How to easily and labor-savingly switch the non-pressure mode and maintain the large power operation is a difficult problem for the pressure cooking utensil to realize non-pressure cooking.

[0086] In the embodiment of the present application, the switching assembly 150 is arranged on the pot cover 300, and the switching assembly 150 comprises a first sealing piece 11 and a second sealing piece 14, which are movably connected. Figure 6 In the embodiment, the first sealing piece 11 is located below the second sealing piece 14, and the first sealing piece 11 is provided with a steam hole 17. In one embodiment, the first sealing piece 11 is located below the second sealing piece 14, and the second sealing piece 14 is provided with a steam hole 17.

[0087] In one embodiment, the first sealing piece 11 can be located above the second sealing piece 14, and the first sealing piece 11 is provided with a steam hole 17. The positions of the first sealing piece 11 and the second sealing piece 14 and the position of the steam hole 17 can be specifically limited according to actual needs, and the embodiment of the present application does not make specific limitation thereon.

[0088] In one embodiment, the first sealing piece 11 can be fixed, and the second sealing piece 14 can be movable. In one embodiment, the first sealing piece 11 can be movable, and the second sealing piece 14 can be fixed. In one embodiment, the first sealing piece 11 and the second sealing piece 14 can both be movable.

[0089] Optionally, the first sealing piece 11 and the second sealing piece 14 can be ceramic pieces.

[0090] Optionally, in one embodiment, the pressure cooking utensil 500 can be switched to a pressure cooking mode or a non-pressure cooking mode before cooking.

[0091] Optionally, in one embodiment, the pressure cooking utensil 500 can switch from the pressure cooking mode to the non-pressure cooking mode, or vice versa, during the cooking process.

[0092] Optionally, in one embodiment, the pressure cooking utensil 500 can switch from the pressure cooking mode to the non-pressure cooking mode, or vice versa, during the cooking process.

[0093] Please refer to Figure 6 The first sealing member 11 comprises a first contact surface 26 in contact with the second sealing member 14, and the second sealing member 14 comprises a second contact surface 29 in contact with the first sealing member 11. The first contact surface 26 and the second contact surface 29 are in a non-planar shape. Optionally, the non-planar shape comprises a non-horizontal surface and a non-inclined surface. The first contact surface 26 and the second contact surface 29 are shaped to allow the first sealing member 11 and the second sealing member 14 to form a tight sealing connection via the first contact surface 26 and the second contact surface 29. The shape of the first contact surface 26 and the second contact surface 29 can be defined according to actual needs, which are not limited in the present application.

[0094] The steam exhaust area of the steam exhaust hole 17 is S, and the upper limit of S can be determined according to the space configuration, cost, cooking demand, etc. of the lid assembly 400. In one example, the power of the pressure cooking utensil 500 is 2.2kW. The first sealing member 11 is provided with at least one steam exhaust hole 17, and the steam exhaust area S of the steam exhaust hole 17 is greater than 12.9mm 2 to ensure that the internal pressure can be effectively controlled during the cooking process of the pressure cooking utensil 500. When the steam exhaust hole 17 is single, the steam exhaust area S of the steam exhaust hole 17 is greater than 12.9mm 2 When the steam exhaust hole 17 is multiple (two or more), the total steam exhaust area S of all steam exhaust holes 17 is greater than 12.9mm 2 The steam exhaust area S of each steam exhaust hole 17 can be the same or different, which is not specifically limited here. Such design ensures that, to some extent, when the pressure cooking utensil 500 works in the non-pressure cooking mode, steam can be quickly and safely exhausted to the outside of the cooking cavity 250, so that non-pressure cooking can be realized even without reducing the heating power of the pressure cooking utensil 500. The number of steam exhaust holes 17 can be specifically defined according to actual conditions, which is not specifically limited in the present application. In one example, please refer to Figure 17 The number of steam exhaust holes 17 can be 2.

[0095] In the illustrated embodiment, the steam vent hole 17 is in the form of a through hole. In one embodiment, the steam vent hole 17 can be in the form of a notch (e.g., by removing one side wall of the through hole to make the through hole communicate with the outside of the through hole from the side), and the edge of the notch away from the center of the first sealing sheet 11 can be sealed by the structure in which the first sealing sheet 11 is installed, such as by the side wall of the accommodating cavity 38 sealing the edge of the notch away from the center of the first sealing sheet 11, or the hole wall of the mounting hole 94 of the pot cover 300 sealing the edge of the notch away from the center of the first sealing sheet 11.

[0096] In Figures 11 to 13 the illustrated embodiment, the first contact surface 26 is in close contact with the second contact surface 29 during the relative movement between the second sealing sheet 11 and the first sealing sheet 14. The switching assembly 150 is configured such that the first sealing sheet 11 and the second sealing sheet 14 can move relative to each other so that the first contact surface 26 and the second contact surface 29 can be in close contact to open the steam vent hole 17 and close the steam vent hole 17. Alternatively, the opening of the steam vent hole 17 refers to a state other than the closing of the steam vent hole 17, when the steam vent area of the steam vent hole 17 is used for steam exhaust (the steam vent hole 17 is fully opened), the pressureless cooking mode of the pressure cooking appliance 500 can be achieved. When part of the steam vent area of the steam vent hole 17 is used for steam exhaust (the steam vent hole 17 is partially opened), the pressure cooking mode with different pressure can be achieved. Under the condition that the heating power of the pressure cooking appliance 500 is constant, the larger the area of the steam vent hole 17 used for steam exhaust, the smaller the pressure in the cooking cavity 250.

[0097] Please refer to Figure 7 and Figure 11 , the second sealing sheet 14 can close the steam vent hole 17 to seal the cooking cavity 250, so that the steam in the cooking cavity 250 cannot escape from the pressure cooking appliance 500, and the pressure in the cooking cavity 250 is basically maintained at the level required for cooking; in Figure 12 , the second sealing sheet 14 can open part of the steam vent hole 17, so that the cooking cavity 250 communicates with the outside of the cooking cavity 250 through the steam vent hole 17, part of the steam in the cooking cavity 250 can escape from the pressure cooking appliance 500, and the pressure in the cooking cavity 250 decreases as the area of the steam vent hole 17 that is opened increases; please refer to Figure 8 and Figure 13, the second sealing piece 14 can completely open the steam vent hole 17 to make the cooking cavity 250 communicate with the outside of the cooking cavity 250 through the steam vent hole 17, most of the steam in the cooking cavity 250 can escape from the pressure cooking utensil 500, the cooking cavity 250 is in a pressureless state to a certain extent, and pressureless cooking can be performed. In conclusion, in the embodiment of the utility model, the pressure cooking utensil 500 can switch between pressure cooking and pressureless cooking through the relative movement between the first contact surface 26 of the first sealing piece 11 and the second contact surface 29 of the second sealing piece 14, and the pressureless cooking can be realized without reducing the power of the pressure cooking utensil 500, thereby improving the user experience.

[0098] In one embodiment, during the relative movement between the second sealing piece 11 and the first sealing piece 14, the first contact surface 26 and the second contact surface 29 are not always in close contact, and there is a separation state. When the second sealing piece 11 and the first sealing piece 14 are in close contact, the second sealing piece 14 can close the steam vent hole 17 to seal the cooking cavity 250, the steam in the cooking cavity 250 cannot escape from the pressure cooking utensil 500, the pressure in the cooking cavity 250 is basically maintained at a level required for cooking, and pressure cooking can be performed; when the second sealing piece 11 and the first sealing piece 14 move relatively to separate the first contact surface 26 from the second contact surface 29, a certain distance is formed between the first contact surface 26 and the second contact surface 29, the second sealing piece 14 opens a part of the steam vent hole 17, and the cooking cavity 250 communicates with the outside of the cooking cavity 250 through the steam vent hole 17, part of the steam in the cooking cavity 250 can escape from the pressure cooking utensil 500; when the second sealing piece 11 and the first sealing piece 14 move relatively to make the distance between the first contact surface 26 and the second contact surface 29 larger, the second sealing piece 14 can completely open the steam vent hole 17 to make the cooking cavity 250 communicate with the outside of the cooking cavity 250 through the steam vent hole 17, most of the steam in the cooking cavity 250 can escape from the pressure cooking utensil 500, the cooking cavity 250 is in a pressureless state to a certain extent, and pressureless cooking can be performed.

[0099] Optionally, the pot body 200 comprises a heating assembly and an inner container, the inner container is provided with a cooking cavity 250, and the heating assembly can be arranged below the inner container. When the heating assembly is started, the inner container can be heated. The power of the heating assembly is adjustable to meet different heating requirements.

[0100] In some embodiments, the non-planar surface comprises at least one of a conical surface, a frustoconical surface, an arc surface, a sawtooth surface, and a square wave surface.

[0101] In this way, the first sealing piece 11 and the second sealing piece 14 can be in close contact, so that the steam in the cooking cavity cannot escape from between the first contact surface and the second contact surface.

[0102] Specifically, the first sealing piece 11 and the second sealing piece 14 are in a non-planar shape, the non-planar shape includes at least one of a conical surface, a circular frustum lateral surface, an arc surface, a zigzag surface, and a square wave surface, that is, the non-planar shape can include any one of the conical surface, the circular frustum lateral surface, the arc surface, the zigzag surface, and the square wave surface, the non-planar shape can also include any two of the conical surface, the circular frustum lateral surface, the arc surface, the zigzag surface, and the square wave surface, the non-planar shape can also include any three of the conical surface, the circular frustum lateral surface, the arc surface, the zigzag surface, and the square wave surface, and the non-planar shape can also include the conical surface, the circular frustum lateral surface, the arc surface, the zigzag surface, and the square wave surface. It can be understood that the non-planar shape in the illustrated embodiment is relatively easy to manufacture, and the non-planar shape can also include other non-horizontal and non-inclined planar shapes.

[0103] In Figure 7 With Figure 8 In the illustrated embodiment, the first contact surface 26 is in the shape of a circular frustum lateral surface, and the second contact surface 29 is in the shape of a conical surface matching the circular frustum lateral surface, so that the first sealing piece 11 and the second sealing piece 14 can form a tight sealing connection through the first contact surface 26 and the second contact surface 29. Since the two contact surfaces are very smooth, the friction coefficient μ between the two is very low, so that the relative movement between the first sealing piece 11 and the second sealing piece 14 is smoother, and the operating force can be greatly reduced, to some extent, making it easier for the pressure cooking appliance 500 to switch between pressure cooking and non-pressure cooking.

[0104] In one embodiment, the second contact surface 29 is in the shape of a circular frustum lateral surface, and the first contact surface 26 is in the shape of a conical surface matching the circular frustum lateral surface, so that the first sealing piece 11 and the second sealing piece 14 can form a tight sealing connection through the first contact surface 26 and the second contact surface 29.

[0105] In one embodiment, the first contact surface 26 is in the shape of an arc surface, and the second contact surface 29 is in the shape of an arc surface matching the first contact surface 26, so that the first sealing piece 11 and the second sealing piece 14 form a surface contact through the tight contact of the first contact surface 26 and the second contact surface 29. When the first contact surface 26 and the second contact surface 29 are in tight contact, the steam in the cooking cavity cannot escape from between the first contact surface 26 and the second contact surface 29. Optionally, the arc surface includes but is not limited to a wavy arc surface (as shown in Figure 21

[0106] In one embodiment, please refer to Figure 20 ​, the first contact surface 26 is in the shape of a sawtooth surface, and the second contact surface 29 is in the shape of a sawtooth surface engaged with the first contact surface 26, so that the first seal 11 and the second seal 14 form surface contact through close contact of the first contact surface 26 and the second contact surface 29. When the first contact surface 26 and the second contact surface 29 are in close contact, steam in the cooking cavity cannot escape from between the first contact surface 26 and the second contact surface 29.

[0107] In one embodiment, please refer to Figure 20 , the first contact surface 26 is in the shape of a square wave surface, and the second contact surface 29 is in the shape of a square wave surface engaged with the first contact surface 26, so that the first seal 11 and the second seal 14 form surface contact through close contact of the first contact surface 26 and the second contact surface 29. When the first contact surface 26 and the second contact surface 29 are in close contact, steam in the cooking cavity cannot escape from between the first contact surface 26 and the second contact surface 29.

[0108] In some embodiments, the switching assembly 150 is configured to relatively move the first seal 11 and the second seal 14 to adjust the opening area of the steam vent hole 17.

[0109] In this way, the pressure in the cooking cavity 250 can be adjusted by adjusting the opening area of the steam vent hole 17.

[0110] Specifically, adjusting the opening area of the steam vent hole 17 can mean adjusting the opening area of the steam vent hole 17 when the steam vent hole 17 is in an open state. In one example, the initial state of the steam vent hole 17 is closed, and the second seal 14 is controlled to relatively move with the first seal 11 to open the steam vent hole 17. When the steam vent hole 17 is in an open state, the second seal 14 is controlled to relatively move with the first seal 11 to adjust the opening area of the steam vent hole 17, for example, from 50% × S to 80% × S, S being the steam vent area of the steam vent hole 17.

[0111] Please refer to Figure 7 and Figure 11 , the second seal 14 closes the steam vent hole 17 to seal the cooking cavity 250, and the pressure in the cooking cavity 250 is substantially maintained at a level required for cooking; in Figure 12 , the second seal 14 opens a part of the steam vent hole 17, and the pressure in the cooking cavity 250 decreases as the opening area of the steam vent hole 17 increases; please refer to Figure 8 and Figure 13 , in one embodiment, the second seal 14 completely opens the steam vent hole 17, and the steam vent area of the steam vent hole 17 is used for steam venting, and the pressure cooking appliance 500 can perform pressureless cooking.

[0112] In one embodiment, when the steam vent hole 17 is partially opened, a portion of the steam vent area of the steam vent hole 17 can be used for steam venting, and the pressure cooking utensil 500 can be used for non-pressure cooking. In such an embodiment, the second sealing member 14 can further reduce the opening area (greater than zero) of the steam vent hole 17, so that the pressure cooking utensil 500 can be used for micro-pressure cooking. The second sealing member 14 can further increase the opening area of the steam vent hole 17, so that the pressure cooking utensil 500 can be used for non-pressure cooking.

[0113] For example, when the steam vent hole 17 has a minimum opening area of 80% x S, a portion of the steam vent area of the steam vent hole 17 can be used for steam venting, and the pressure cooking utensil 500 can be used for non-pressure cooking (the pressure in the cooking cavity 250 is less than or equal to 4 kPa). When the second sealing member 14 moves to make the opening area of the steam vent hole 17 50% x S, the pressure cooking utensil 500 can be used for micro-pressure cooking (e.g., the pressure in the cooking cavity 250 is greater than 4 kPa). When the second sealing member 14 moves to make the opening area of the steam vent hole 17 90% x S, the pressure cooking utensil 500 can be used for non-pressure cooking, and the pressure in the cooking cavity 250 is less than the pressure in the cooking cavity 250 corresponding to the opening area of 80% x S.

[0114] In some embodiments, the first sealing member 11 and the second sealing member 14 are arranged in a stack, and the first sealing member 11 is closer to the cooking cavity 250 than the second sealing member 14.

[0115] In this way, the first sealing member 11 and the second sealing member 14 arranged in a stack can reduce the space occupied by the sealing members on the lid assembly 400, so that the switching assembly 150 is more compact.

[0116] Specifically, referring to Figure 6 , the first sealing member 11 and the second sealing member 14 are arranged in a stack, and the first sealing member 11 is below the second sealing member 14, so that the first sealing member 11 and the second sealing member 14 can move relative to each other to open or close the steam vent hole 17. The first sealing member 11 is closer to the cooking cavity 250 than the second sealing member 14, so that the steam vent hole 17 is also closer to the cooking cavity 250, and when the steam vent hole 17 communicates the cooking cavity 250 with the outside, the steam can reach the steam vent hole 17 more quickly. Such a design can ensure that the steam can escape from the cooking cavity 250 quickly, reducing the time for releasing pressure, and to some extent, improving the cooking efficiency of the pressure cooking utensil 500.

[0117] In some embodiments, the second sealing member 14 can rotate relative to the first sealing member 11 on the first contact surface 26, and the opening of the steam vent hole 17 on the first contact surface 26 is located on the movement path of the second contact surface 29.

[0118] In this way, when the second sealing member 14 rotates relative to the first sealing member 11, the steam exhaust hole 17 can be opened or closed, and the opening area of the steam exhaust hole 17 can be adjusted to adjust the pressure in the cooking cavity 250, so that the pressure cooking appliance 500 can flexibly adjust the internal pressure according to different cooking requirements, thereby improving the cooking efficiency and safety to a certain extent.

[0119] Specifically, in order to enable the pressure cooking appliance 500 to flexibly adjust the internal pressure according to different cooking requirements and improve the cooking effect, the opening area of the steam exhaust hole 17 can be changed within a range. In the embodiment of the utility model, please refer to Figure 6 , the first sealing member 11 and the second sealing member 14 are stacked, the first sealing member 11 is below the second sealing member 14, the first contact surface 26 is below the second contact surface 29, the first contact surface 26 and the second contact surface 29 are in close cooperation with each other, and the second sealing member 14 can rotate relative to the first sealing member 11 on the first contact surface 26, and the opening of the steam exhaust hole 17 on the first contact surface 26 is located on the movement path of the second contact surface 29. The second sealing member 14 can rotate relative to the first sealing member 11, which can reduce the height of the pot cover assembly 400 to a certain extent. In Figures 11 to 13 , the second sealing member 14 rotates relative to the first sealing member 11, and the second sealing member 14 can rotate relative to the first sealing member 11, so as to open or close the steam exhaust hole 17.

[0120] Please refer to Figures 11 to 13 , the opening area of the steam exhaust hole 17 can change with the relative movement stroke size (rotation angle size) of the second sealing member 14, the pressure in the cooking cavity 250 can be adjusted, and the pressure cooking appliance 500 can switch between the pressure state and the non-pressure state as needed during cooking. This can improve the cooking efficiency and safety to a certain extent, and can also adapt to various cooking requirements.

[0121] In some embodiments, the second sealing member 14 includes a second body 20, and the second body 20 is provided with a notch 23. When the notch 23 and the steam exhaust hole 17 are in communication in the up-down direction, the switching assembly 150 opens the steam exhaust hole 17, and when the notch 23 and the steam exhaust hole 17 are not in communication in the up-down direction, the switching assembly 150 closes the steam exhaust hole 17.

[0122] In this way, the cooperation between the notch 23 and the steam exhaust hole 17 can adjust the steam exhaust area of the steam exhaust hole 17 to adjust the degree of communication between the cooking cavity 250 and the outside, so that the pressure cooking appliance 500 can flexibly adjust the pressure in the cooking cavity 250 according to different cooking requirements.

[0123] Specifically, please refer to Figures 7 to 8 and Figures 11 to 13The second sealing member 14 comprises a second body 20, and a notch 23 is arranged on the side surface of the second body 20. When the notch 23 communicates with the steam vent hole 17 in the up-down direction, the switching assembly 150 opens the steam vent hole 17, the cooking cavity 250 communicates with the outside, and the steam can be released; when the notch 23 does not communicate with the steam vent hole 17 in the up-down direction, the switching assembly 150 closes the steam vent hole 17, the cooking cavity 250 does not communicate with the outside, and is still in a sealed state, and the steam cannot escape from the cooking cavity 250 to the outside. The number of the notch 23 is not specifically limited in the utility model, and in an example, the number of the notch 23 is two, and one notch 23 corresponds to one steam vent hole 17.

[0124] Optionally, the area of the notch 23 is not less than the steam vent area of the steam vent hole 17, so that the steam vent hole 17 can be completely opened when the pressure cooking appliance 500 selects pressureless cooking. The size of the area of the notch 23 can be specifically limited according to actual needs, and the utility model does not specifically limit this.

[0125] In some embodiments, the switching assembly 150 comprises a valve shell 32 and a sealing gasket 35, the valve shell 32 is internally provided with a containing cavity 38, the first sealing member 11 and the second sealing member 14 are arranged in the containing cavity 38, two ends of the containing cavity 38 are respectively provided with a first opening 41 and a second opening 43, the sealing gasket 35 is arranged at the first opening 41, the switching assembly 150 is sealingly connected with the pot cover 300 through the sealing gasket 35, and in the case that the steam vent hole 17 is opened, the cooking cavity 250 communicates with the outside of the cooking cavity 250 through the steam vent hole 17 and the second opening 43.

[0126] In this way, the sealing gasket 35 can seal the interface between the switching assembly 150 and the pot cover 300, so that the steam is prevented from leaking out of the gap between the switching assembly 150 and the pot cover 300, and the cooking effect is affected.

[0127] Specifically, referring to Figure 6 The valve shell 32 is internally provided with the containing cavity 38, the first sealing member 11 and the second sealing member 14 are arranged in the containing cavity 38 in a stacked manner, the sealing gasket 35 is located below the first sealing member 11 and abuts against the surface of the first sealing member 11 facing the cooking cavity 250, the sealing gasket 35 can sealingly connect the first sealing member 11 and the pot cover 300, the pot cover 300 is provided with a through hole, and the switching assembly 150 can cover the through hole. The sealing gasket 35 prevents the steam from leaking out of the gap between the pot cover 300 and the first sealing member 11.

[0128] Please combine Figure 14The two ends of the accommodating cavity 38 are respectively provided with a first opening 41 and a second opening 43, and the sealing gasket 35 is arranged at the first opening 41, so that the sealing gasket 35 can be connected to the valve shell 32 and the pot cover 300 in a sealed manner, thereby preventing steam from leaking out of the gap between the pot cover 300 and the valve shell 32. In summary, the sealing gasket 35 can be connected to the switching assembly 150 and the pot cover 300 in a sealed manner, thereby preventing steam from leaking out of the gap between the pot cover 300 and the switching assembly 150, and affecting the cooking effect.

[0129] Please refer to Figure 4 and Figure 5 The fixing portion 88 is arranged above the pot cover assembly 400, and the switching assembly 150 is fixedly connected or detachably connected to the fixing portion 88. Optionally, the switching assembly 150 and the fixing portion 88 can be permanently connected together by a fixed connection mode including but not limited to welding, bonding, riveting and the like, so that the switching assembly 150 can maintain high stability; alternatively, the switching assembly 150 and the fixing portion 88 can be connected together by a detachable connection mode such as a bolt, a latch, a buckle and the like, so that the switching assembly 150 is convenient for maintenance and replacement of parts. In the embodiment of the utility model, the switching assembly 150 and the fixing portion 88 are detachably connected. The connection mode of the switching assembly 150 and the fixing portion 88 can be specifically defined according to actual needs.

[0130] The manufacturing process of the fixing portion 88 is not specifically limited in the embodiment of the utility model, and in one example, the fixing portion 88 can include but is not limited to being manufactured by thread fixing, riveting fixing, welding fixing or being integrally cast with the pot cover 300.

[0131] Please refer to Figure 4 The fixing portion 88 is provided with a fixing column 91, and the valve shell 32 is provided with a mounting hole 94. The switching assembly 150 is first positioned by the mounting hole 94 corresponding to the fixing column 91, and the fixing column 91 is arranged through the mounting hole 94, so that the position of the switching assembly 150 mounted on the fixing portion 88 can be accurately determined. Then, the fastener 96 is arranged through the mounting hole 94 and connected to the fixing column 91, so that the mounting hole 94 and the fixing column 91 can be fixedly connected, and the switching assembly 150 can be stably placed on the pot cover 300, thereby reducing the risk of movement or tilting during transportation or use to a certain extent. The fastener 96 includes but is not limited to a screw, a bolt, a rivet and the like. Optionally, in Figure 4 , the fastener 96 is a screw, so that the switching assembly 150 and the fixing portion 88 are detachably connected.

[0132] The number of the fixing columns 91, the mounting holes 94 and the fasteners 96 is not specifically limited in the embodiment of the utility model. In an example, the number of the fixing columns 91, the mounting holes 94 and the fasteners 96 is three. One fixing column 91 corresponds to one mounting hole 94 and one fastener 96. 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 combine Figure 5 In the embodiment of the utility model, the fixing part 88 is provided with the screw hole 100, and the switching assembly 150 is provided with the stud, and the fixing part 88 and the switching assembly 150 are connected by the stud 103 and the screw hole 100. In other embodiments, the fixing part 88 can be provided with the stud 103, and the switching assembly 150 can be provided with the screw hole.

[0133] In some embodiments, one of the side wall of the accommodating cavity 38 and the first sealing element 11 is provided with the first limiting groove 46, and the other is provided with the first limiting block 49, and the first limiting block 46 is arranged in the first limiting groove 49 so that the valve shell 32 limits the first sealing element 11.

[0134] In this way, the first limiting block 49 and the first limiting groove 46 can cooperate with each other, so that the valve shell 32 can limit the movement of the first sealing element 11.

[0135] Specifically, in the embodiment of the utility model, please combine Figure 6 , Figure 14 and Figure 18 , the first limiting groove 46 is arranged on the side wall of the accommodating cavity 38 of the valve shell 32, and the first limiting block 49 is arranged on the circumferential side surface of the first sealing element 11. In other embodiments, the first limiting groove 46 can be arranged on the circumferential side surface of the first sealing element 11, and the first limiting block 49 can be arranged on the side wall of the accommodating cavity 38 of the valve shell 32.

[0136] The first limiting block 49 can be clamped into the first limiting groove 46, so that the valve shell 32 and the first sealing element 11 are closely combined, the movement of the first sealing element 11 can be limited, and the second sealing element 14 can move (such as rotary motion or translational motion) relative to the first sealing element 11.

[0137] The number of the first limiting groove 46 and the first limiting block 49 is not specifically limited in the embodiment of the utility model. In an example, the number of the first limiting groove 46 and the first limiting block 49 is two. One first limiting block 49 is arranged in the corresponding first limiting groove 46.

[0138] In some embodiments, the switching assembly 150 comprises an operating spool 52 partially located in the valve housing 32, the operating spool 52 is connected with the second sealing member 14, and the operating spool 52 comprises a first operating portion 55 extending out of the valve housing 32 from the second opening 43, the first operating portion 55 is configured to move the second sealing member 14 relative to the first sealing member 11 to open and close the steam vent 17.

[0139] In this way, the first operating portion 55 can move the second sealing member 14 relative to the first sealing member 11 to open and close the steam vent 17, change the opening area of the steam vent 17, and realize the switching between the pressure state and the non-pressure state during the cooking of the pressure cooking appliance 500.

[0140] Specifically, please refer to Figure 4 and Figure 6 , the operating spool 52 is partially located in the valve housing 32 and partially extends out of the valve housing 32. In Figures 11 to 13 the illustrated embodiment, the operating spool 52 is connected with the second sealing member 14, and the operating spool 52 is non-rotatably connected with the second sealing member 14. When the first operating portion 55 rotates, the operating spool 52 can be rotated to drive the second sealing member 14 to rotate relative to the first sealing member 11 to open and close the steam vent 17.

[0141] In other embodiments, the operating spool 52 is fixedly connected with the second sealing member 14, and when the first operating portion 55 translates, the operating spool 52 can be translated to drive the second sealing member 14 to move translationally relative to the first sealing member 11 to open and close the steam vent 17.

[0142] The movement of the operating spool 52 can be realized in an electric manner and / or a manual manner. Specifically, when realized in the electric manner, the lid assembly 400 can comprise a motor and a connecting member, the connecting member can connect the shaft of the motor and the first operating portion 55, and when the motor operates, the operating spool 52 can be driven by the connecting member to rotate back and forth or translate back and forth, so that the second sealing member 14 rotates back and forth or translates back and forth relative to the first sealing member 11 to open and close the steam vent 17. When realized in the manual manner, the first operating portion 55 can be exposed outside the lid assembly 400, and a user can operate the first operating portion 55 by hand or a tool to rotate or translate the operating spool 52 to move back and forth, so that the second sealing member 14 rotates back and forth or translates back and forth relative to the first sealing member 11 to open and close the steam vent 17.

[0143] In some embodiments, the switching assembly 150 comprises a sealing ring 61, a first abutting surface 64 is arranged on the outer side surface of the operating spool 52, a second abutting surface 67 is arranged on the inner side surface of the valve housing 32 facing the accommodating cavity 38, and the first abutting surface 64 and the second abutting surface 67 abut through the sealing ring 61.

[0144] In this way, the sealing ring 61 can seal the connection between the operation valve core 52 and the valve shell 32, preventing steam from leaking out of the gap between the operation valve core 52 and the valve shell 32 in the pressureless cooking mode, affecting the cooking effect.

[0145] Specifically, the main role of the 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 7 The outer side surface of the operation valve core 52 is provided with a first abutting surface 64, and the inner side surface of the valve shell 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 abut through the sealing ring 61, preventing steam from leaking out of the gap between the operation valve core 52 and the valve shell 32 in the pressureless mode, while reducing the friction between the operation valve core 52 and the valve shell 32, to some extent, prolonging the service life of the switching assembly 150.

[0146] In some embodiments, the first abutting surface 64 is provided with a first accommodating groove 70, and the second abutting surface 67 is provided with a second accommodating groove 73. A part of the sealing ring 61 is accommodated in the first accommodating groove 70, and the other part is accommodated in the second accommodating groove 73.

[0147] In this way, the cooperation of the first accommodating groove 70 and the second accommodating groove 73 can ensure that the sealing ring 61 is accurately placed, preventing the sealing ring 61 from being displaced and affecting.

[0148] Specifically, please refer to Figure 7 The outer side surface of the operation valve core 52 is provided with a first abutting surface 64, and the first abutting surface 64 is provided with a first accommodating groove 70. The inner side surface of the valve shell 32 facing the accommodating cavity 38 is provided with a second abutting surface 67, and the second abutting surface 67 is provided with a second accommodating groove 73. The first accommodating groove 70 and the second accommodating groove 73 can form a containing space, and the sealing ring 61 is accommodated in the containing space, which can accurately position the placement position of the sealing ring 61. At the same time, the containing space can also limit the sealing ring 61, which can ensure the sealing effect of the sealing ring 61. A part of the sealing ring 61 is accommodated in the first accommodating groove 70, and the other part is accommodated in the second accommodating groove 73. Under the action of pressure, the sealing ring 61, the first accommodating groove 70 and the second accommodating groove 73 can form a uniform and tight sealing space, to some extent, improving the sealing effect and preventing steam from leaking out of the gap between the operation valve core 52 and the valve shell 32.

[0149] In some embodiments, the second sealing member 14 comprises a second body 20, one of the second body 20 and the operating valve core 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 arranged in the second limiting groove 76 to drive the second sealing member 14 to move when the first operating part 55 moves.

[0150] In this way, the second limiting block 79 can cooperate with the second limiting groove 76, so that the second sealing member 14 can move relative to the first sealing member 11 when the operating valve core 52 moves.

[0151] Specifically, in the embodiment of the utility model, please combine Figure 6 , Figure 16 and Figure 17 , the second limiting groove 76 is arranged on the surface of the second body 20 of the second sealing member 14 away from the cooking cavity 250, and the second limiting block 79 is arranged on the surface of the operating valve core 52 towards the cooking cavity 250. In other embodiments, the second limiting groove 76 can be arranged on the surface of the operating valve core 52 towards the cooking cavity 250, and the second limiting block 79 is arranged on the surface of the second body 20 away from the cooking cavity 250. The second limiting block 79 can be clamped into the second limiting groove 76, so that the operating valve core 52 is closely attached to the second sealing member 14, and the second sealing member 14 can move relative to the first sealing member 11 when the operating valve core 52 moves.

[0152] The number of the second limiting groove 76 and the second limiting block 79 is not specifically limited in the embodiment of the utility model. In one example, the number of the second limiting groove 76 and the second limiting block 79 is 2. One second limiting block 79 is arranged in a corresponding second limiting groove 76.

[0153] In some embodiments, the second sealing member 14 comprises a second body 20 and a second operating part 58, the second body 20 comprises a second contact surface 29, and the second operating part 58 is arranged on another surface of the second body 20 different from the surface of the second contact surface 29, and the second operating part 58 is configured to drive the second sealing member 14 to move relative to the first sealing member 11 to open and close the steam vent 17 when moving.

[0154] In this way, the second operating part 58 can directly cooperate with other operating members, and drive the second sealing member 14 to move relative to the first sealing member 11 to open and close the steam vent 17 when moving, so as to change the opening area of the steam vent 17.

[0155] Specifically, please combine Figure 17 and Figure 18The second sealing member 14 includes a second body 20, a surface of the second body 20 in contact with the first sealing member 11 is a lower surface of the second sealing member 14 (i.e., a second contact surface 29), and the second operation portion 58 is arranged on an upper surface of the second sealing member 14. It can be understood that, in other embodiments, the second operation portion 58 can be arranged on a circumferential side surface of the second sealing member 14.

[0156] When the second operation portion 58 is operated to move, the second sealing member 14 can be driven to move back and forth relative to the first sealing member 11, so that the steam vent 17 can be opened and closed.

[0157] It can be understood that, in other embodiments, the second operation portion 58 is arranged protruding on the upper surface of the second sealing member 14. The movement of the second sealing member 14 can be achieved in an electric manner and / or a manual manner. Specifically, when achieved in the electric manner, the pot cover assembly 400 can include a motor and a connecting member, the connecting member can connect a shaft output shaft of the motor and the second operation portion 58, and when the motor operates, the second operation portion 58 is driven to rotate back and forth or to move back and forth by the connecting member, so that the second sealing member 14 is driven to rotate back and forth or to move back and forth relative to the first sealing member 11, so as to open and close the steam vent 17. When achieved in the manual manner, the second operation portion 58 can be exposed from the pot cover assembly 400, and a user can operate the second operation portion 58 by hand or a tool to move the second operation portion 58 in a rotating manner or a translating manner, so that the second sealing member 14 is driven to rotate back and forth or to move back and forth relative to the first sealing member 11, so as to open and close the steam vent 17.

[0158] Optionally, the second operation portion 58 and the second sealing member 14 are in an integral molding structure.

[0159] The shape of the second operation portion 58 is not specifically limited in the utility model, and in an example, the shape of the second operation portion 58 can be a regular hexagonal prism or other regular or irregular column.

[0160] In some embodiments, the second sealing member 14 can block a part of the steam vent 17, or all of the steam vent 17, or not block the steam vent 17.

[0161] In this way, the second sealing member 14 and the first sealing member 11 can cooperate with each other to adjust the blocking degree of the steam vent 17 and change the opening area of the steam vent 17, and the blocking degree of the steam vent 17 can be flexibly adjusted to change the opening area of the steam vent 17, so that the different cooking requirements of the pressure cooking appliance 500 can be met to a certain extent.

[0162] Specifically, please refer to Figures 11 to 13 When the second sealing member 14 and the first sealing member 11 move relative to each other, the second sealing member 14 can block a part of the steam vent 17, or all of the steam vent 17, or not block the steam vent 17. In Figure 12In the middle, the second seal 14 blocks a portion of the vent hole 17, and the opening area of ​​the vent hole 17 is between zero and the vent area, which can reduce the steam release rate, thereby controlling the rate of pressure rise inside the cooking cavity 250 and achieving more precise pressure regulation; in Figure 11 In the middle, the second seal 14 completely blocks the vent hole, and the opening area of ​​the vent hole 17 is zero, which can prevent steam release and cause the internal pressure of the pressure cooker to rise rapidly; Figure 13 In this design, the second seal 14 does not obstruct the vent 17, and the opening area of ​​the vent 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 seal 14 and the first seal 11, the degree of obstruction of the vent 17 can be flexibly adjusted to change the opening area of ​​the vent 17, thereby meeting the different cooking needs of the pressure cooking appliance 500 to a certain extent.

[0163] In some embodiments, the relative movement between the first seal 11 and the second seal 14 includes rotational movement and / or translational movement.

[0164] 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.

[0165] Specifically, in Figures 11 to 13 In the illustrated embodiment, the first contact surface 26 is shaped like the side surface of a frustum, and the second contact surface 29 is shaped like a conical surface that matches the side surface of the frustum. During the relative rotational movement of the second sealing piece 11 and the first sealing piece 14, the first contact surface 26 and the second contact surface 29 are in close contact. The first sealing piece 11 and the second sealing piece 14 rotate relative to each other; optionally, the rotation direction of the second sealing piece 14 is counterclockwise. The first sealing piece 11 and the second sealing piece 14... Figure 11 When the first seal 11 is in the middle position, the vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the pressure cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the second seal 14 is rotated counterclockwise by a certain angle, if the first seal 11 and the second seal 14 are in the middle position... Figure 12 In the middle position, part of the vent 17 is blocked, allowing the cooking chamber 250 to communicate with the outside through the vent 17. Some steam inside the cooking chamber 250 can escape outside the 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 seal 14 continues to rotate counterclockwise by a certain angle, if the first seal 11 and the second seal 14 are in... Figure 13When the second sealing piece 14 is located at the position shown in FIG. 8, the steam vent hole 17 is completely blocked, so that the cooking cavity 250 is sealed, and the steam in the cooking cavity 250 cannot escape out of the pressure cooking utensil 500, and the pressure in the cooking cavity 250 is kept at a level required for cooking; after the second sealing piece 14 is translated upward by a distance, a part of the steam vent hole 17 is blocked, so that the cooking cavity 250 is in communication with the outside of the cooking cavity 250 through the steam vent hole 17, and a part of the steam in the cooking cavity 250 can escape out of the pressure cooking utensil 500, and the pressure in the cooking cavity 250 decreases as the area of the steam vent hole 17 that is opened increases; after the second sealing piece 14 is continuously translated upward by a distance, the steam vent hole 17 is not blocked, so that the cooking cavity 250 is in communication with the outside of the cooking cavity 250 through the steam vent hole 17, and most of the steam in the cooking cavity 250 can escape out of the pressure cooking utensil 500, and the cooking cavity 250 is in a pressureless state to a certain extent, and pressureless cooking can be performed.

[0166] In one embodiment, please refer to FIG. 8 and Figures 19 to 21 , the first contact surface 26 is at least one of arc-shaped, jagged, and square wave-shaped relative to the second contact surface 29. During relative movement between the second sealing piece 11 and the first sealing piece 14, the first contact surface 26 and the second contact surface 29 are in close contact. The second sealing piece 14 is relatively translated along the first sealing piece 11 in a certain direction, which can be optionally specifically defined according to the shape of the first contact surface 26 and the second contact surface 29, and the present application does not make a specific limitation thereon.

[0167] In one example, the translation direction of the second sealing piece 14 is the up-down direction. The first sealing piece 11 and the second sealing piece 14 are in Figure 7 When the second sealing piece 14 is located at the position shown in FIG. 8, the steam vent hole 17 is completely blocked, so that the cooking cavity 250 is sealed, and the steam in the cooking cavity 250 cannot escape out of the pressure cooking utensil 500, and the pressure in the cooking cavity 250 is kept at a level required for cooking; after the second sealing piece 14 is translated upward by a distance, a part of the steam vent hole 17 is blocked, so that the cooking cavity 250 is in communication with the outside of the cooking cavity 250 through the steam vent hole 17, and a part of the steam in the cooking cavity 250 can escape out of the pressure cooking utensil 500, and the pressure in the cooking cavity 250 decreases as the area of the steam vent hole 17 that is opened increases; after the second sealing piece 14 is continuously translated upward by a distance, the steam vent hole 17 is not blocked, so that the cooking cavity 250 is in communication with the outside of the cooking cavity 250 through the steam vent hole 17, and most of the steam in the cooking cavity 250 can escape out of the pressure cooking utensil 500, and the cooking cavity 250 is in a pressureless state to a certain extent, and pressureless cooking can be performed.

[0168] Please refer to FIG. 8 and Figure 8 , the switching assembly 150 is provided with an inlet 82 and an outlet 85, the inlet 82 is located at the bottom of the switching assembly 150, and the outlet 17 is located at the top of the switching assembly 150. In Figure 7 , when the steam vent hole 17 is completely blocked, the steam vent hole 17 cannot communicate with the inlet 82 and the outlet 85, and the inlet 82 is completely closed, so that the steam in the cooking cavity 250 cannot escape to the outside; in Figure 8 , when the steam vent hole 17 is completely opened, the steam vent hole 17 communicates with the inlet 82 and the outlet 85, and the steam in the cooking cavity 250 can escape to the outside through the inlet 82, the steam vent hole 17, and the outlet 85 in sequence, so that the pressure cooking utensil 500 can perform pressureless cooking.

[0169] In some embodiments, the pressure cooking appliance 500 comprises a float assembly 330, which is arranged on the lid 300.

[0170] In this way, the float assembly 330 can reflect the pressure change in the cooking cavity 250 in real time.

[0171] Specifically, in combination with Figure 1 , Figure 9 and Figure 10 , the float assembly 330 is arranged on the lid 300, and the float assembly 330 comprises a float 331 and a steam exhaust passage 334, which can communicate the cooking cavity 250 with the outside of the cooking cavity 250. In combination with Figure 7 and Figure 11 , the second sealing member 14 closes the steam exhaust hole 17 so that the cooking cavity 250 is sealed, and the pressure cooking appliance 500 is in pressure cooking. The cooking cavity 250 starts to heat and generate steam, so that the pressure in the cooking cavity 250 gradually rises. In combination with Figure 10 , the float 331 is lifted by the upward pressure to close the steam exhaust passage 334, so as to close the cooking cavity 250, and the steam in the cooking cavity 250 cannot escape to the outside, thereby forming a closed pressure cavity in the cooking cavity 250. Therefore, the float assembly 330 can reflect the pressure change in the cooking cavity in real time.

[0172] Optionally, in combination with Figure 9 , when the pressure in the cooking cavity 250 decreases to the atmospheric pressure, the float 331 descends, and the cooking cavity 250 is communicated with the outside through the steam exhaust passage 334, so that the steam in the cooking cavity 250 can escape through the steam exhaust passage 334.

[0173] In addition, the float 331 can also exhaust the cold air in the cooking cavity 250. Under the condition of normal temperature and pressure, the float 331 can descend along the height direction of the pressure cooking appliance 500 and be in the position of Figure 9 , the steam exhaust passage 334 is communicated with the cooking cavity 250, so that the inside and outside of the cooking cavity 250 are communicated through the steam exhaust passage 334, and the cold air in the cooking cavity 250 can be exhausted to the outside of the cooking cavity 250 before the pressure is built up, which can reduce the time required for building up the pressure. When the pressure in the cooking cavity 250 is built up, the float 331 can float to the position of Figure 10 along the height direction of the pressure cooking appliance 500, the steam exhaust passage 334 is blocked from the cooking cavity 250, so that the inside and outside of the cooking cavity 250 are blocked, and the pressure cooking appliance 100 can be in pressure cooking.

[0174] In some embodiments, the pressure cooking appliance 500 comprises a pressure relief assembly 360 and a float assembly 330, which are arranged on the lid 300. The pressure relief assembly 360 is configured to allow the cooking cavity 250 to communicate with the outside of the cooking cavity 250 through the pressure relief assembly 360 when the pressure in the cooking cavity 250 is greater than or equal to the safety pressure, and to prevent the cooking cavity 250 from communicating with the outside of the cooking cavity 250 through the pressure relief assembly 360 when the pressure in the cooking cavity 250 is less than the safety pressure.

[0175] In this way, the safety of the pressure cooking appliance 500 can be further improved.

[0176] Specifically, please refer to Figure 2 , the pressure relief assembly 360 and the float assembly 330 are arranged on the lid 300. The pressure relief assembly 360 comprises a pressure relief valve 361. Figure 2 In some embodiments, the pressure relief valve 361 can be a gravity hammer. Please refer to Figure 7 and Figure 11 , the second sealing member 14 closes the steam vent hole 17 so that the cooking cavity 250 is sealed, and the pressure cooking appliance 500 is in pressure cooking. At this time, the pressure in the cooking cavity 250 is less than the safety pressure, and the pressure relief valve 361 seals the cooking cavity 250 with the second sealing member 14, forming a closed pressure cavity in the cooking cavity 250. At this time, the working pressure is relatively high, and a relatively high temperature and pressure can be achieved in the cooking cavity 250. Due to the high pressure in the cooking cavity 250, water in the cooking process usually does not boil, but maintains a high-pressure and high-temperature steam state.

[0177] When the pressure in the cooking cavity 250 is greater than or equal to the safety pressure, the pressure relief mechanism is triggered, and the pressure relief valve 361 communicates with the outside of the cooking cavity 250 to release the excess pressure in the cooking cavity 250, so that the pressure in the cooking cavity 250 can be maintained within a safe range.

[0178] It can be understood that the safety pressure of the pressure cooking appliance 500 refers to the maximum allowable pressure value set by the pressure cooking appliance 500 under normal working conditions to ensure safety. In one example, the safety pressure can be 70 kPa.

[0179] Optionally, please refer to Figure 2 , the pressure relief assembly 360 comprises a pressure relief lever 364 and a pressure relief button 367. One end of the pressure relief lever 364 is connected to the pressure relief button 367, and the other end is connected to the pressure relief valve 361, which can be used to manually trigger the pressure relief process. When it is necessary to quickly reduce the pressure in the cooking cavity 250, the user can press the pressure relief button 367, and the end of the pressure relief lever 364 connected to the pressure relief valve 361 can lift the pressure relief valve 361 due to the lever effect, so that the pressure relief valve 361 releases the pressure in the cooking cavity 250.

[0180] In some embodiments, the pressure cooking appliance 500 comprises a pressure limiting assembly 390, which is arranged on the lid 300, and is configured to allow the cooking cavity 250 to communicate with the outside of the cooking cavity 250 through the pressure limiting assembly 390 when the pressure in the cooking cavity 250 is greater than or equal to the set pressure, and to prevent the cooking cavity 250 from communicating with the outside of the cooking cavity 250 through the pressure limiting assembly 390 when the pressure in the cooking cavity 250 is less than the set pressure.

[0181] In this way, the safety and reliability of the pressure cooking appliance 500 can be ensured to a certain extent.

[0182] Specifically, please refer to Figure 3 , the pressure limiting assembly 390 is arranged on the lid 300, and the pressure limiting assembly 390 comprises a pressure limiting valve 391. Optionally, in Figure 3 , the pressure limiting valve 391 can be a gravity ball. Please refer to Figure 7 and Figure 11 , the second sealing member 14 closes the steam vent hole 17 so that the cooking cavity 250 is sealed, and the pressure cooking appliance 500 is in pressure cooking. At this time, the pressure in the cooking cavity 250 is less than the set pressure, and the pressure limiting valve and the second sealing member 14 seal the cooking cavity 250 to form a closed pressure cavity in the cooking cavity 250. At this time, the water in the cooking cavity 250 evaporates and generates steam, so that the water in the cooking cavity 250 will boil during cooking.

[0183] When the pressure in the cooking cavity 250 is greater than or equal to the set pressure, the pressure limiting valve 391 communicates with the outside of the cooking cavity 250 to release the excess pressure in the cooking cavity 250, so that the pressure in the cooking cavity 250 fluctuates around the set pressure value.

[0184] It can be understood that the set pressure of the pressure cooking appliance 500 is a specific micro-pressure state that the pressure cooking appliance 500 can maintain when working. In an example, the set pressure is less than the safety pressure, and the set pressure can be 20 kPa.

[0185] Optionally, in an embodiment, the pressure cooking appliance 500 can be switched to a pressure cooking mode or a non-pressure cooking mode or a micro-pressure cooking mode before cooking.

[0186] Optionally, in an embodiment, the pressure cooking appliance 500 can be switched from a pressure cooking mode to a non-pressure cooking mode or a micro-pressure cooking mode during cooking, or from a non-pressure cooking mode to a pressure cooking mode or a micro-pressure cooking mode, or from a micro-pressure cooking mode to a pressure cooking mode or a non-pressure cooking mode.

[0187] Optionally, in one embodiment, the pressure cooking utensil 500 can be switched into the pressure cooking mode or the non-pressure cooking mode or the micro-pressure cooking mode before cooking, and during the cooking process, the pressure cooking utensil 500 can be switched from the pressure cooking mode to the non-pressure cooking mode or the micro-pressure cooking mode, or switched from the non-pressure cooking mode to the pressure cooking mode or the micro-pressure cooking mode, or switched from the micro-pressure cooking mode to the pressure cooking mode or the non-pressure cooking mode.

[0188] The pressure in the cooking cavity 250 in the micro-pressure cooking mode is between the pressure in the cooking cavity 250 in the non-pressure cooking mode and the pressure in the cooking cavity 250 in the pressure cooking mode.

[0189] In some embodiments, the pressure cooking utensil 500 satisfies at least one of the following: the steam venting area of the steam vent hole 17 is greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 ; the material of the first sealing member 11 and the second sealing member 14 is a hard material, the Vickers hardness of the hard material is greater than or equal to 50HV5; the surface roughness of the first contact surface 26 of the first sealing member 11 in contact with the second sealing member 14 is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns; the surface roughness of the second contact surface 29 of the second sealing member 14 in contact with the first sealing member 11 is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns.

[0190] In this way, the switching effect between the pressure cooking and the non-pressure cooking of the pressure cooking utensil 500 can be ensured to a certain extent.

[0191] Specifically, in one embodiment, the pressure cooking utensil 500 satisfies that the steam venting area of the steam vent hole 17 is greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 . In one embodiment, the pressure cooking utensil 500 satisfies that the material of the first sealing member 11 and the second sealing member 14 is a hard material, and the Vickers hardness of the hard material is greater than or equal to 50HV5. In one embodiment, the pressure cooking utensil 500 satisfies that the surface roughness of the first contact surface 26 is not greater than 3.2 microns, the flatness is not greater than 3.2 microns, the surface roughness of the second contact surface 29 is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns.

[0192] In one embodiment, the pressure cooking utensil 500 satisfies that the steam venting area of the steam vent hole 17 is greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 , and the material of the first sealing member 11 and the second sealing member 14 is a hard material, and the Vickers hardness of the hard material is greater than or equal to 50HV5. In one embodiment, the pressure cooking utensil 500 satisfies that the steam venting area of the steam vent hole 17 is greater than or equal to 19.5mm2 and less than or equal to 314mm 2 and the surface roughness of the first contact surface 26 is not greater than 3.2 microns and the flatness is not greater than 3.2 microns, and the surface roughness of the second contact surface 29 is not greater than 3.2 microns and the flatness is not greater than 3.2 microns. In one embodiment, the pressure cooking appliance 500 satisfies that the material of the first sealing member 11 and the second sealing member 14 is a hard material, the Vickers hardness of the hard material is greater than or equal to 50HV5, and the surface roughness of the first contact surface 26 is not greater than 3.2 microns, the flatness is not greater than 3.2 microns, and the surface roughness of the second contact surface 29 is not greater than 3.2 microns, the flatness is not greater than 3.2 microns.

[0193] In one embodiment, the pressure cooking appliance 500 simultaneously satisfies that the steam exhaust area of the steam exhaust hole 17 is greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 and the material of the first sealing member 11 and the second sealing member 14 is a hard material, the Vickers hardness of the hard material is greater than or equal to 50HV5, and the surface roughness of the first contact surface 26 is not greater than 3.2 microns and the flatness is not greater than 3.2 microns, and the surface roughness of the second contact surface 29 is not greater than 3.2 microns and the flatness is not greater than 3.2 microns.

[0194] Please combine Figure 7 and Figure 8 The steam exhaust hole 17 is arranged on the first sealing member 11, the first sealing member 11 is fixed, the second sealing member 14 is movable, the second sealing member 14 moves relative to the first sealing member 11 to open the steam exhaust hole 17 to enable the cooking cavity 250 to communicate with the outside of the cooking cavity 250 through the steam exhaust hole 17, and the steam exhaust hole 17 is a channel for steam in the cooking cavity 250 to escape to the outside, and can release pressure. In the high-power operating state of the pressure cooking appliance 500, if the steam exhaust area of the steam exhaust hole 17 is too small, the pressure cooking appliance 500 cannot realize the pressureless cooking mode without reducing the power of the pressure cooking appliance 500. If the steam exhaust area of the steam exhaust hole 17 is too large, the volume required by the switching assembly 150 is too large and the manufacturing cost is high. Therefore, the appropriate steam exhaust area of the steam exhaust hole 17 can ensure that the pressure cooking appliance 500 can quickly reach and maintain a pressureless state during high-power cooking, thereby improving the cooking efficiency. In the embodiment of the utility model, the steam exhaust area of the steam exhaust hole 17 is greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 , which can enable the pressure cooking appliance 500 to maintain a pressureless state (the pressure in the cooking cavity 250 can be less than 1kPa) in the high-power operating state, and to a certain extent, provide fast and uniform heating effect for food.

[0195] When the steam vent hole 17 is fully opened, the steam vent area of the steam vent hole 17 is S. S is greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 , i.e. 19.5mm 2 ≤ S ≤ 314mm 2 . In some examples, S = 19.5mm 2 , 49mm 2 , 78.5mm 2 , 108mm 2 , 137.5mm 2 , 167mm 2 , 196.5mm 2 , 226mm 2 , 255.5mm 2 , 285mm 2 , 314mm 2 or other values greater than or equal to 19.5mm 2 and less than or equal to 314mm 2 .

[0196] When the pressure cooking appliance 500 is in operation, in particular when operating in the pressure cooking mode, the interior of the cooking chamber 250 can be under high pressure. These high pressures can act on the two seals. Therefore, the first seal 11 and the second seal 14 can be made of a hard material that can withstand high pressure without being easily or not deformed or damaged, so as to prolong the service life. The Vickers hardness of the hard material is greater than or equal to 50HV5.

[0197] The material of the first seal 11 and the second seal 14 is not specifically limited in the utility model. 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 the embodiment of the utility model, the Vickers hardness of the hard material used by the first seal 11 and the second seal 14 is greater than or equal to 50HV5, which has good wear resistance, can resist friction and wear, and has strong pressure resistance and can withstand high pressure without deformation or damage.

[0198] The Vickers hardness H of the hard material is greater than or equal to 50HV5, i.e. H ≥ 50HV5. In some examples, H = 50HV5, 52HV5, 54HV5, 56HV5, 58HV5 or other values greater than or equal to 50HV5. The upper limit of H can be determined according to the manufacturing process, cost and other factors of the seal.

[0199] Specifically, please refer to Figure 7 and Figure 8, the first sealing member 11 and the second sealing member 14 are stacked and arranged in a mechanical sealing mode, the switching assembly 150 is arranged on the pot cover 300 through the sealing gasket 35, and the first contact surface 26 and the second contact surface 29 are tightly attached to each other under the pressure provided by the sealing gasket 35 and the pressure in the cooking cavity 250, so that a sealing effect is formed on the contact surfaces. Meanwhile, the second sealing member 14 rotates on the first sealing member 11 to open or close the steam vent hole 17. In order to make the relative movement between the first sealing member 11 and the second sealing member 14 more smooth and make the first contact surface 26 and the second contact surface 29 form a better sealing effect, the surface roughness and flatness of the first contact surface 26 and the second contact surface 29 have certain requirements. The smaller the surface roughness and flatness, the higher the smoothness and flatness of the contact surface. Since the two contact surfaces are very smooth, the friction coefficient μ between the two contact surfaces is very low (usually less than 0.5), and the switching force F1 = the pressure P in the pot * the area S of the steam vent hole is reduced to the switching force F2 = the pressure P in the pot * the area S* of the steam vent hole * the friction coefficient μ * cos θ (the size of θ is the angle between the first contact surface 26 and the bottom, that is, the angle between the generatrix of the conical surface or the side surface of the circular truncated cone and the bottom), which greatly reduces the operating force and makes the pressure cooking utensil 500 easier to switch between pressure cooking and non-pressure cooking.

[0200] In the embodiment of the utility model, the surface roughness of the first contact surface 26 is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns; the surface roughness of the second contact surface 29 is not greater than 3.2 microns, and the flatness is not greater than 3.2 microns, so that the relative movement between the first sealing member 11 and the second sealing member 14 is more smooth, and the first contact surface 26 and the second contact surface 29 form a better sealing effect.

[0201] The surface roughness R is not greater than 3.2 microns, that is, R≤3.2 microns. In an example, R = 3.2 microns, 3.0 microns, 2.8 microns, 2.6 microns, 2.4 microns, 2.2 microns, 2.0 microns, or other values not greater than 3.2 microns. The flatness F is not greater than 3.2 microns, that is, F≤3.2 microns. In an example, F = 3.2 microns, 3.0 microns, 2.8 microns, 2.6 microns, 2.4 microns, 2.2 microns, 2.0 microns, or other values not greater than 3.2 microns. The lower limit of R and F can be determined according to manufacturing process, cost, etc.

[0202] Optionally, the surface roughness and flatness of the first contact surface 26 can be the same as or different from the surface roughness and flatness of the second contact surface 29.

[0203] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" and the like means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific feature, structure, material or characteristic described can be combined in any one or more embodiments or examples in a suitable manner.

[0204] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A pressure cooking appliance, characterized in that, include: A pot lid assembly, comprising a pot lid and a switching component, wherein the switching component is disposed on the pot lid; A pot body, the pot body being connected to the pot lid, a cooking cavity being formed inside the pot body, and the pot lid covering the cooking cavity; The switching assembly includes a first seal and a second seal that are movably connected. The first seal includes a first contact surface, and the second seal includes a second contact surface. The first contact surface and the second contact surface are non-planar in shape. The shapes of the first contact surface and the second contact surface are adapted to form a surface contact between the first seal and the second seal through the tight contact between the first contact surface and the second contact surface. The first seal is provided with a vent hole. The switching assembly is configured to close the vent hole to seal the cooking cavity through the tight contact between the first contact surface and the second contact surface when the first seal and the second seal move relative to each other, and to open the vent hole to allow the cooking cavity to communicate with the outside of the cooking cavity through the vent hole. The steam vent area is configured such that when the steam vent is open, the pressure cooking appliance can achieve pressureless cooking.

2. The pressure cooking appliance according to claim 1, characterized in that, The non-planar surface includes at least one of the following: conical surface, frustum lateral surface, arc surface, sawtooth surface, and square wave surface.

3. The pressure cooking appliance according to claim 1, characterized in that, The switching component is configured to move relative to the first seal and the second seal to adjust the opening area of ​​the vent hole.

4. The pressure cooking appliance according to claim 1, characterized in that, The first seal and the second seal are stacked together, with the first seal being closer to the cooking cavity than the second seal.

5. The pressure cooking appliance according to any one of claims 1-4, characterized in that, The second seal is capable of rotating relative to the first seal on the first contact surface, and the opening of the vent hole on the first contact surface is located on the movement path of the second seal.

6. The pressure cooking appliance according to claim 5, characterized in that, The second sealing element includes a second body with 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.

7. 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 member and the second sealing member 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 pot lid through the sealing gasket. When the vent is open, the cooking cavity communicates with the outside of the cooking cavity through the vent and the second opening.

8. The pressure cooking appliance according to claim 7, characterized in that, One of the sidewalls of the accommodating cavity and the first sealing element 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 element.

9. The pressure cooking appliance according to claim 7, characterized in that, The switching assembly includes an operating valve core partially located within the valve housing. The operating valve core is connected to the second seal. The operating valve core includes a first operating portion extending from the valve housing through a second opening. The first operating portion is configured to move the second seal relative to the first seal when in motion, thereby opening and closing the vent hole.

10. The pressure cooking appliance according to claim 9, characterized in that, The switching assembly includes a sealing ring, a first abutting surface is provided on the outer side of the operating valve core, 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 sealing ring.

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

12. The pressure cooking appliance according to claim 9, characterized in that, The second sealing element includes a second body, on which a second limiting groove is provided on one of the operating valve cores and a second limiting block is provided on the other. The second limiting block is disposed in the second limiting groove so that when the first operating part moves, the second sealing element moves through the cooperation of the second limiting block and the second limiting groove.

13. The pressure cooking appliance according to claim 9, characterized in that, The second seal includes a second body and a second operating part. The second body includes a second contact surface. The second operating part is disposed on another surface of the second body that is different from the second contact surface. The second operating part is configured to drive the second seal relative to the first seal to open and close the vent hole when it moves.

14. The pressure cooking appliance according to claim 5, characterized in that, The second seal can block part of the vent, or block all of it, or not block the vent.

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

16. The pressure cooking appliance according to any one of claims 1-4, characterized in that, The pressure cooking appliance includes a float assembly disposed on the pot lid.

17. The pressure cooking appliance according to any one of claims 1-4, characterized in that, The pressure cooking appliance includes a pressure relief assembly and a float assembly, which are disposed on the pot lid. The pressure relief assembly is configured to allow the cooking cavity to communicate with the outside through the pressure relief assembly when the pressure inside the cooking cavity is greater than or equal to the safe pressure, and to prevent the cooking cavity from communicating with the outside through the pressure relief assembly when the pressure inside the cooking cavity is less than the safe pressure.

18. The pressure cooking appliance according to any one of claims 1-4, characterized in that, The pressure cooking appliance includes a pressure limiting component disposed on the lid. The pressure limiting component is configured to allow the cooking cavity to communicate with the outside through the pressure limiting component when the pressure inside the cooking cavity is greater than or equal to a set pressure, and to prevent the cooking cavity from communicating with the outside through the pressure limiting component when the pressure inside the cooking cavity is less than the set pressure.

19. The pressure cooking appliance according to claim 1, 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. 2 And less than or equal to 314mm 2 ; The first seal (11) and the second seal (14) are made of hard materials, and the Vickers hardness of the hard materials is greater than or equal to 50HV5; The surface roughness of the first contact surface between the first seal and the second seal is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers. The surface roughness of the second contact surface between the second seal and the first seal is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers.

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