Cooking utensil

Abstract

The utility model relates to a cooking utensil. The cooking utensil comprises a pot cover assembly, the pot cover assembly comprises a switching assembly and a pot cover, the pot cover is provided with a steam hole, the switching assembly is arranged on the pot cover and covers the steam hole, the switching assembly comprises a movable part, a first sealing ring and a steam exhaust hole, the movable part is used for opening and closing the steam exhaust hole during movement, and the switching assembly is connected with the pot cover in a sealed mode through the first sealing ring; the first sealing ring is provided with a through hole; a cooking cavity is formed in the pot body, the pot cover assembly covers the cooking cavity, and the cooking cavity is communicated with the steam exhaust hole through the steam vent hole and the through hole in sequence; the projection positions of the steam exhaust hole and the through hole on the pot cover are located in the range of the steam through hole in the height direction of the cooking utensil. According to the cooking utensil, the thickness of the first sealing ring can be reduced to a certain extent, so that the thickness of the switching assembly is reduced, and miniaturization of the cooking utensil is facilitated.

Description

Technical Field

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

[0002] To enrich existing cooking scenarios, cooking appliances include switching components that can switch between pressurized and unpressurized cooking modes. However, the current switching components are relatively thick, which is not conducive to the miniaturization of cooking appliances. Utility Model Content

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

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

[0005] A pot lid assembly, comprising a switching component and a pot lid, wherein the pot lid is provided with a steam vent, the switching component is disposed on the pot lid and covers the steam vent, the switching component includes a movable part, a first sealing ring and a steam vent, the movable part is used to open and close the steam vent during movement, and the switching component is sealed to the pot lid through the first sealing ring, the first sealing ring being provided with a through hole;

[0006] The pot body has a cooking cavity formed inside the pot body, and the pot lid assembly covers the cooking cavity. The cooking cavity is connected to the steam vent through the steam vent and the through hole in sequence.

[0007] Along the height direction of the cooking appliance, the projection positions of the steam vent and the through hole on the pot lid are located within the range of the steam vent.

[0008] In the aforementioned cooking appliances, the projection positions of the vent hole and the through hole on the lid are located within the range of the vent hole along the height direction of the cooking appliance. This allows the steam discharged from the vent hole to be discharged directly upward into the vent hole along the height direction of the cooking appliance without changing the flow direction within the through hole of the first sealing ring. To a certain extent, this can reduce the thickness of the first sealing ring, thereby reducing the thickness of the switching component and facilitating the miniaturization of the cooking appliance.

[0009] In some embodiments, the diameter of the steam inlet is not less than the diameter of the steam outlet and not less than the diameter of the through hole.

[0010] In some embodiments, the switching assembly includes a fixing member, wherein the first sealing ring, the fixing member, and the movable member are stacked sequentially in the height direction of the cooking appliance, away from the cooking cavity, and the fixing member is provided with the vent hole;

[0011] The fixing member includes a first contact plane, and the moving member includes a second contact plane, wherein the first contact plane and the second contact plane are parallel to and in contact with each other.

[0012] In some embodiments, the movable member is capable of rotating relative to the fixed member on the first contact plane to open and close the vent hole, the opening of the vent hole on the first contact plane being located on the movement path of the movable member.

[0013] In some embodiments, the switching assembly includes a housing and an operating member. The housing has a receiving cavity, in which the movable member, the fixed member, and the first sealing ring are disposed. A portion of the operating member is located within the receiving cavity and connected to the movable member, while another portion extends out of the receiving cavity. The operating member is configured to drive the movable member to rotate relative to the fixed member during movement.

[0014] In some embodiments, one of the movable component and the operating component is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block and the first limiting groove are connected in cooperation so that when the operating component moves, the movable component is driven to rotate through the cooperation of the first limiting block and the first limiting groove.

[0015] In some embodiments, one of the sidewall of the accommodating cavity and the fixing member is provided with a second limiting groove, and the other is provided with a second limiting block. The second limiting block is embedded in the second limiting groove so that the housing limits the fixing member.

[0016] In some embodiments, the pot lid is provided with a fixing part, and the shell is fixedly connected to or detachably connected to the fixing part.

[0017] In some embodiments, the vent area of ​​the vent is configured to enable pressureless cooking by the cooking appliance when the vent is open.

[0018] In some embodiments, the switching component is configured such that the movable member rotates relative to the fixed member to adjust the opening area of ​​the vent hole.

[0019] In some embodiments, the cooking appliance satisfies at least one of the following: the steam vent area is greater than or equal to 19.5 mm² and less than or equal to 314 mm²;

[0020] The materials of the fixing member and the moving member are hard materials, and the Vickers hardness of the hard materials is greater than or equal to 50HV5;

[0021] The surface roughness of the first contact plane 26 is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers; the surface roughness of the second contact plane 29 is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers.

[0022] Additional aspects and advantages of the embodiments of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a cross-sectional schematic diagram of the cooking utensil according to an embodiment of the present utility model;

[0025] Figure 2 This is a partial cross-sectional schematic diagram of the cooking utensil according to an embodiment of the present utility model;

[0026] Figure 3 This is a partial cross-sectional schematic diagram of a cooking appliance based on related technologies;

[0027] Figure 4 This is an exploded view of the pot lid assembly according to an embodiment of the present invention.

[0028] Figure 5 This is another exploded view of the pot lid assembly according to an embodiment of the present utility model;

[0029] Figure 6 This is an exploded view of the switching component according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the shell structure according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the operating component according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure of the movable component according to an embodiment of the present utility model;

[0033] Figure 10 This is a schematic diagram showing the connection between the movable component and the operating component in an embodiment of this utility model;

[0034] Figure 11 This is a structural schematic diagram of the fastener according to an embodiment of the present utility model;

[0035] Figure 12 This is a schematic diagram of the connection between the movable and fixed parts in a pressurized cooking state according to an embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the connection between the movable and fixed parts in the pressure switching state according to an embodiment of the present invention;

[0037] Figure 14 This is a schematic diagram of the connection between the movable and fixed parts in a pressureless cooking state according to an embodiment of this utility model;

[0038] Figure 15 This is a diagram showing the relationship between the exhaust area of ​​the exhaust hole and the power of the cooking appliance in an embodiment of this utility model.

[0039] Explanation of key figure labels:

[0040] Fixed component-11, movable component-14, vent hole-17, notch-23, second contact plane-29, first contact plane-26, housing-32, first sealing ring-35, accommodating cavity-38, first opening-41, second opening-43, second limiting groove-46, second limiting block-49, operating component-52, first limiting groove-76, first limiting block-79, fixed part-88, fixed post-91, mounting hole-94, fastener-97, screw hole-100, screw stud-103, through hole-106, vent hole-109, second sealing ring-112, switching assembly-150, pot body-200, pot lid-300, pot lid assembly-400, cooking cavity-250.

[0041] Cooking utensils - Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] This disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described herein. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0047] Please see Figures 1 to 3 The present invention provides a cooking appliance including a lid assembly 400 and a pot body 200. The lid assembly 400 includes a switching component 150 and a lid 300. The lid 300 is provided with a steam vent 109. The switching component 150 is disposed on the lid 300 and covers the steam vent 109. The switching component 150 includes a movable part 14, a first sealing ring 35, and a steam vent 17. The movable part 14 is used to open and close the steam vent 17 when in motion. The switching component 150 is sealed to the lid 300 through the first sealing ring 35, which is provided with a through hole 106.

[0048] A cooking cavity 250 is formed inside the pot body 200, and the pot lid assembly 400 covers the cooking cavity 250. The cooking cavity 250 is connected to the exhaust hole 17 through the steam vent 109 and the through hole 106 in sequence.

[0049] Along the height direction of the cooking appliance, the projection positions of the vent hole 17 and the through hole 106 on the pot lid 300 are located within the range of the vent hole 109.

[0050] In the aforementioned cooking appliance, along the height direction of the cooking appliance, the projection positions of the vent hole 17 and the through hole 106 on the lid 300 are located within the range of the vent hole 109. This allows the steam discharged from the vent hole 109 to be discharged directly upward into the vent hole 17 within the through hole 106 of the first sealing ring 35 without changing the flow direction. This can reduce the thickness of the first sealing ring 35 to a certain extent, thereby reducing the thickness of the switching component 150, which is beneficial for the miniaturization of the cooking appliance.

[0051] Specifically, in this embodiment of the invention, the cooking appliance can operate in a pressurized cooking mode and a pressureless cooking mode. In pressurized cooking mode, the switching component 150 can close the vent 17, sealing the cooking chamber 250, thereby allowing pressurized cooking of the food. In pressureless cooking mode, the switching component 150 can open the vent 17, allowing the cooking chamber 250 to communicate with the outside world through the vent 109, the through hole 106, and the vent 17, thereby allowing pressureless cooking of the food.

[0052] It should be noted that the pressureless cooking described in this invention refers to cooking with a pressure of less than or equal to 4 kPa within the cooking chamber 250 during operation. The venting area of ​​the vent 17 is configured to enable pressureless cooking when the vent 17 is open. The venting area of ​​the vent 17 can be understood as the opening area of ​​the vent 17. In one embodiment, when the vent 17 is fully open, the entire venting area of ​​the vent 17 is used for venting, enabling pressureless cooking. In another embodiment, when the vent 17 is partially open, a portion of the venting area of ​​the vent 17 is used for venting, enabling pressureless cooking.

[0053] When the vent 17 is opened to a certain size (fully or partially), the vent area of ​​the vent 17, which enables pressureless cooking, is related to the power of the cooking appliance. Generally, the higher the power of the cooking appliance, the larger the vent area of ​​the vent 17 required for pressureless cooking. The vent area of ​​the vent 17 corresponding to pressureless cooking at a certain appliance power can be determined through simulation, testing, and empirical values. In some examples, please refer to... Figure 15 , Figure 15The relationship between the vent area of ​​the vent hole 17 and the power of the cooking appliance is shown under pressureless cooking (the pressure inside the cooking chamber 250 is 4 kPa).

[0054] Cooking appliances include, but are not limited to, pressure cookers, electric pressure cookers, pressure slow cookers, etc. Please refer to... Figure 1 The cooking appliance includes a lid 300, a pot body 200, and a cooking cavity 250. When the lid 300 and pot body 200 are closed, they form a relatively enclosed cooking cavity 250. When the vent 17 is closed and the cooking appliance begins to operate, the food inside the cooking cavity 250 is heated, the water inside the cooking cavity 250 begins to evaporate, and the amount of steam generated gradually increases, causing the pressure inside the cooking cavity 250 to gradually rise. Because the cooking cavity 250 is sealed at this time, the steam cannot escape from the cooking appliance, resulting in the pressure inside the cooking cavity 250 being maintained, thereby increasing the boiling point of the water and accelerating the cooking process.

[0055] To provide more cooking options and flexibility to meet different ingredients and cooking needs, the cooking appliance uses a switching component 150 to achieve both pressurized and non-pressurized cooking modes. (Please refer to the relevant technology.) Figure 3 The switching assembly 150a includes a seal 35a, which seals the contact surface between the switching assembly 150a and the lid 300a. The seal 35a has a through hole 106a, and the lid 300a has a steam vent 109a communicating with the cooking cavity 250a, the through hole 106a, and the vent 17a. In the height direction of the pressure cooker, the cooking cavity 250a, the steam vent 109a, the through hole 106a, and the vent 17a are arranged from bottom to top. However, because the steam vent 109a is relatively small, the gas needs to change its flow direction laterally within the through hole 106a before entering the vent 17a after exiting the through hole 109a. The depth of the through hole 106a in the vertical direction determines the channel width in the lateral flow direction. However, the width of the channel needs to meet a certain amount of steam discharge. Therefore, in order to ensure the width of the channel, the thickness of the seal 35a in the height direction of the pressure cooker will be set to be larger, which will increase the overall thickness of the switching component 150a and is not conducive to the miniaturization of the pressure cooker.

[0056] In this embodiment of the utility model, such as Figure 2As shown, along the height direction of the cooking appliance, the projection positions of the vent hole 17 and the through hole 106 on the lid 300 are located within the range of the vent hole 109. This allows the steam discharged from the vent hole 109 to be discharged directly upward into the vent hole 17 along the height direction of the cooking appliance without changing the flow direction within the through hole 106 of the first sealing ring 35. This is equivalent to the diameter of the through hole 106 serving as the width of the channel, thereby ensuring the width of the channel and the amount of steam discharged to a certain extent without increasing the thickness of the first sealing ring 35, which is beneficial for the miniaturization of the cooking appliance.

[0057] In some embodiments, the diameter of the steam inlet 109 is not less than the diameter of the exhaust hole 17 and not less than the diameter of the through hole 106.

[0058] Thus, the diameter of the steam vent 109 is not less than the diameter of the steam exhaust vent 17 and not less than the diameter of the through hole 106, which ensures that steam can be smoothly discharged from the cooking chamber 250, avoids bottlenecks and resistance in the flow process to a certain extent, improves steam exhaust efficiency, and thus optimizes cooking performance.

[0059] Specifically, the diameter of the steam vent 109 can be greater than or equal to the diameter of the exhaust vent 17 and the diameter of the through hole 106.

[0060] Along the height direction of the cooking appliance, the projected positions of the vent hole 17 and the through hole 106 on the lid 300 are located within the range of the vent hole 109. In one embodiment, along the height direction of the cooking appliance, the projected positions of the vent hole 17 and the through hole 106 on the lid 300 are located within the edge of the range of the vent hole 109. In another embodiment, along the height direction of the cooking appliance, the edge of the projected position of the vent hole 17 and the through hole 106 on the lid 300 coincides with the edge of the range of the vent hole 109.

[0061] In an optional embodiment, the movable part 14 is provided with a notch 23. When the notch 23 is connected to the vent hole 17 in the vertical direction, the switching component 150 opens the vent hole 17. When the notch 23 is not connected to the vent hole 17 in the vertical direction, the switching component 150 closes the vent hole 17.

[0062] Thus, the cooperation between the notch 23 and the vent 17 allows the vent area of ​​the vent 17 to be adjusted to regulate the degree of connection between the cooking cavity 250 and the outside world, enabling the cooking appliance to flexibly adjust the pressure inside the cooking cavity 250 according to different cooking needs.

[0063] Specifically, please combine Figure 6 , Figures 9 to 14The notch 23 is located on the side of the movable part 14. When the notch 23 is connected to the vent 17 in the vertical direction, the switching component 150 opens the vent 17, connecting the cooking chamber 250 to the outside, allowing steam to be released. When the notch 23 is not connected to the vent 17 in the vertical direction, the switching component 150 closes the vent 17, preventing the cooking chamber 250 from connecting to the outside and maintaining a sealed state, thus preventing steam from escaping from the cooking chamber 250 to the outside. This invention does not specifically limit the number of notches 23; in one example, there are two notches 23, with one notch 23 corresponding to one vent 17.

[0064] Optionally, the area of ​​the notch 23 is not less than the steam vent area of ​​the vent 17, so that the vent 17 can be fully opened when the cooking appliance is selected for pressureless cooking. The size of the notch 23 can be specifically limited according to actual needs, and this utility model does not make a specific limitation in this regard.

[0065] In some embodiments, the switching assembly 150 includes a fixing member 11. In the height direction of the cooking appliance, along a direction away from the cooking cavity 250, a first sealing ring 35, the fixing member 11, and a movable member 14 are sequentially stacked. The fixing member 11 has a steam vent 17. The fixing member 11 includes a first contact plane 26, and the movable member 14 includes a second contact plane 29. The first contact plane 26 and the second contact plane 29 are parallel to and in contact with each other.

[0066] Thus, the stacked movable part 14, fixed part 11 and first sealing ring 35 can reduce the space occupied by the pot lid assembly 400, making the switching assembly 150 more compact.

[0067] Specifically, please combine Figure 2 and Figure 6 The movable part 14, the fixed part 11, and the first sealing ring 35 are stacked on top of each other. The movable part 14 is above the fixed part 11, allowing it to move relative to the fixed part 11 to open or close the vent 17. The fixed part 11 is closer to the cooking chamber 250 than the movable part 14, which also makes the vent 17 closer to the cooking chamber 250. When the vent 17 connects the cooking chamber 250 to the outside, steam can be discharged to the outside of the cooking chamber 250 more quickly. This design ensures that steam can escape from the cooking chamber 250 quickly, reducing the time for pressure release and improving the cooking efficiency of the appliance to a certain extent.

[0068] In addition, please combine Figure 12The interface connecting the fixed member 11 and the movable member 14 is planar. Specifically, the first contact plane 26 between the fixed member 11 and the movable member 14 is planar, and the second contact plane 29 between the movable member 14 and the fixed member 11 is also planar. The first contact plane 26 and the second contact plane 29 are parallel and in contact with each other, allowing for smoother relative movement between the fixed member 11 and the movable member 14. Because the contact surfaces are very smooth, the coefficient of friction μ between them is very low, significantly reducing the operating force and making it easier to switch between pressure cooking and non-pressure cooking. For example, the fixed member 11 and the movable member 14 can be made of ceramic.

[0069] In one embodiment, the movable member 14 is capable of rotational movement relative to the fixed member 11 on the first contact plane 26 to open and close the vent hole 17. In another embodiment, the movable member 14 is capable of translational movement relative to the fixed member 11 on the first contact plane 26 to open and close the vent hole 17.

[0070] In one embodiment, the fixing member 11 may be located below the movable member 14, and the fixing member 11 is provided with a vent hole 17. The positions of the fixing member 11 and the movable member 14, as well as the position of the vent hole 17, can be specifically defined according to actual needs, and this embodiment of the utility model does not make specific limitations in this regard.

[0071] In some embodiments, the movable member 14 is capable of rotating relative to the fixed member 11 on the first contact plane 26 to open and close the vent hole 17, the opening of the vent hole 17 on the first contact plane 26 being located on the movement path of the movable member 14.

[0072] Thus, when the movable part 14 rotates relative to the fixed part 11 on the first contact plane 26, it can open or close the steam vent 17. Adjusting the opening area of ​​the steam vent 17 can regulate the pressure inside the cooking cavity 250, allowing the cooking appliance to flexibly adjust the internal pressure according to different cooking needs, thereby enhancing cooking efficiency and safety to a certain extent.

[0073] Specifically, to allow the cooking appliance to flexibly adjust its internal pressure according to different cooking needs and improve cooking results, the opening area of ​​the vent 17 can be varied. The fixed member 11 and the movable member 14 are stacked, with the fixed member 11 below the movable member 14. The first contact plane 26 is located below the second contact plane 29, and the first contact plane 26 and the second contact plane 29 are parallel to each other and in close contact. The movable member 14 can rotate relative to the fixed member 11 on the first contact plane 26, and the opening of the vent 17 on the first contact plane 26 is located on the movement path of the second contact plane 29. Figures 12 to 14In the process, the movable part 14 rotates relative to the fixed part 11 on the first contact plane 26. The movable part 14 can rotate relative to the fixed part 11, thereby opening or closing the exhaust port 17.

[0074] Please combine Figures 12 to 14 The opening area of ​​the vent 17 can be changed according to the relative movement stroke (rotation angle) of the movable part 14, which can adjust the pressure in the cooking chamber 250. The cooking appliance can switch between pressurized and unpressurized states as needed during cooking. This enhances cooking efficiency and safety to a certain extent, while also enabling it to adapt to various cooking needs.

[0075] In some embodiments, the switching assembly 150 includes a housing 32 and an operating member 52. The housing 32 has a receiving cavity 38. The movable member 14, the fixed member 11 and the first sealing ring 35 are disposed in the receiving cavity 38. A part of the operating member 52 is located in the receiving cavity 38 and connected to the movable member 14, and another part extends out of the receiving cavity 38. The operating member 52 is configured to drive the movable member 14 to rotate relative to the fixed member 11 when moving.

[0076] Thus, one part of the operating element 52 is located inside the accommodating cavity 38 and connected to the movable element 14, while the other part extends out of the accommodating cavity 38, making it convenient to control the sealing state of the cooking appliance through the operating element 52, thereby realizing the switching between pressurized cooking mode and pressureless cooking mode.

[0077] Specifically, please refer to Figure 7 The housing 32 has a receiving cavity 38, which can accommodate the stacked movable member 14, fixed member 11 and first sealing ring 35. The operating member 52 is used to operate the movable member 14 to move relative to the fixed member 11, thereby realizing the switching between pressurized cooking mode and pressureless cooking mode. The movable member 14 can be operated to move relative to the fixed member 11 by driving the operating member 52 to extend out of the receiving cavity 38.

[0078] Optionally, the operating element 52 can be operated manually or electrically. In one embodiment, the pot lid assembly 400 may include a motor and a connector. The connector can connect the output shaft of the motor and the operating element 52. When the motor is running, it drives the operating element 52 to rotate back and forth through the connector, thereby causing the movable element 14 to rotate back and forth relative to the fixed element 11 to open and close the vent hole 17.

[0079] In one embodiment, a portion of the operating element 52 may be exposed from the lid assembly 400, and the user may operate the operating element 52 by hand or tool in a rotary manner to move it back and forth, thereby causing the movable element 14 to rotate back and forth relative to the fixed element 11 to open and close the vent 17. It is understood that manual or electric operation can also be used to control the translational movement of the movable element 14.

[0080] In an optional embodiment, the two ends of the accommodating cavity 38 are respectively provided with a first opening 41 and a second opening 43. A first sealing ring 35 is provided in the first opening 41. The switching component 150 is sealed to the side of the pot lid 300 away from the cooking cavity 250 through the first sealing ring 35. The operating component 52 extends into the accommodating cavity 38 through the second opening 43 and is connected to the fixing component 14. When the vent hole 17 is open, the cooking cavity 250 communicates with the outside of the cooking cavity 250 through the vent hole 17 and the second opening 43.

[0081] In this way, the first sealing ring 35 can seal the interface between the switching component 150 and the pot lid 300, preventing steam from leaking out from the gap between the switching component 150 and the pot lid 300 and affecting the cooking effect.

[0082] Specifically, please refer to Figure 7 The accommodating cavity 38 has a first opening 41 and a second opening 43 at its two ends, respectively. A first sealing ring 35 is disposed at the first opening 41. The first sealing ring 35 can seal the connection between the housing 32 and the lid 300, preventing steam from leaking out from the gap between the lid 300 and the housing 32. Therefore, the first sealing ring 35 can seal the connection between the switching component 150 and the lid 300, preventing steam from leaking out from the gap between the lid 300 and the switching component 150 and affecting the cooking effect.

[0083] In alternative implementations, such as Figure 2 As shown, the switching assembly 150 includes a second sealing ring 112, which seals the connection between the housing 32 and the operating member 52 to a certain extent to prevent steam from escaping from the gap between the housing 32 and the operating member 52, thus ensuring the safe discharge of steam.

[0084] In some embodiments, one of the movable member 14 and the operating member 52 is provided with a first limiting groove 76, and the other is provided with a first limiting block 79. The first limiting block 79 and the first limiting groove 76 are connected in cooperation so that when the operating member 52 moves, the movable member 14 is driven to rotate through the cooperation of the first limiting block 79 and the first limiting groove 76.

[0085] Thus, the first limiting block 79 can cooperate with the first limiting groove 76, so that when the operating member 52 moves, it can drive the movable member 14 to rotate on the fixed member 11.

[0086] Specifically, in the embodiments of this utility model, please refer to... Figures 8 to 9The first limiting groove 76 is provided on the surface of the movable member 14 facing away from the cooking cavity 250, and the first limiting block 79 is provided on the surface of the operating member 52 facing the cooking cavity 250. In other embodiments, the first limiting groove 76 may be provided on the surface of the operating member 52 facing the cooking cavity 250, and the first limiting block 79 may be provided on the surface of the movable member 14 facing away from the cooking cavity 250. The first limiting block 79 can be engaged in the first limiting groove 76, so that the operating member 52 is connected to the movable member 14, and when the operating member 52 moves, it can drive the movable member 14 to rotate on the fixed member 11.

[0087] This embodiment of the invention does not specifically limit the number of the first limiting groove 76 and the second limiting block 79. In one example, there are two first limiting grooves 76 and two first limiting blocks 79. One first limiting block 79 is disposed in one corresponding first limiting groove 76.

[0088] Optionally, such as Figure 10 As shown, the operating component 52 and the movable component 14 can be a single-piece molded structure. Optionally, as... Figure 6 As shown, the operating component 52 and the movable component 14 can be separate structures.

[0089] In some embodiments, one of the sidewall of the accommodating cavity 38 and the fixing member 11 is provided with a second limiting groove 46, and the other is provided with a second limiting block 49. The second limiting block 49 is embedded in the second limiting groove 46 so that the housing 32 limits the fixing member 11.

[0090] Thus, the second limiting block 49 and the second limiting groove 46 can cooperate with each other, so that the housing 32 can restrict the movement of the fixing member 11.

[0091] Specifically, in the embodiments of this utility model, please refer to... Figure 7 and 11 The second limiting groove 46 is provided on the side wall of the receiving cavity 38 of the housing 32, and the second limiting block 49 is provided on the circumferential side of the fixing member 11. In other embodiments, the second limiting groove 46 may be provided on the circumferential side of the fixing member 11, and the second limiting block 49 may be provided on the side wall of the receiving cavity 38 of the housing 32.

[0092] The second limiting block 49 can be inserted into the second limiting groove 46, so that the housing 32 is connected to the fixing member 11 and does not rotate relative to it, which can restrict the movement of the fixing member 11, so that the movable member 14 can move relative to the fixing member 11 (such as rotational movement).

[0093] This embodiment of the invention does not specifically limit the number of the second limiting groove 46 and the second limiting block 49. In one example, there are two second limiting grooves 46 and two limiting blocks 49. One second limiting block 49 is disposed in a corresponding second limiting groove 46.

[0094] In some embodiments, the pot lid 300 is provided with a fixing part 88, and the housing 32 is fixedly connected to or detachably connected to the fixing part 88.

[0095] In this way, the switching component 150 can be stably installed on the pot lid 300, ensuring normal operation when the cooking appliance is cooking.

[0096] Specifically, please combine Figure 4 and Figure 5 A fixing part 88 is provided on the surface of the pot lid 300 opposite to the cooking cavity 250. The switching component 150 is fixedly connected to the fixing part 88 or detachably connected to it. Optionally, the switching component 150 and the fixing part 88 can be connected by means including but not limited to welding, bonding, riveting, etc., so that the switching component 150 can maintain high stability; alternatively, the switching component 150 and the fixing part 88 can be connected by means of bolts, pins, buckles, etc., so that the switching component 150 is easy to maintain and replace parts. In this embodiment of the utility model, the switching component 150 and the fixing part 88 are detachably connected. The connection method between the switching component 150 and the fixing part 88 can be specifically defined according to actual needs.

[0097] The present invention does not specifically limit the manufacturing process of the fixing part. In one example, the fixing part may be manufactured by means of thread fixing, riveting fixing, welding fixing or integral casting with the pot lid.

[0098] In an optional embodiment, the fixing part 88 is provided with a fixing post 91, and the housing is provided with a mounting hole 94. The switching component 150 is connected to the fixing part 88 by fasteners 97 passing through the mounting hole 94 and connecting to the fixing post 91.

[0099] Thus, the fastener 97, through the mounting hole 94 and fixedly connected to the fixing post 91, allows the switching assembly 150 to be stably placed on the pot lid 300, reducing the risk of movement or tilting during transportation or use to a certain extent.

[0100] Specifically, please combine Figure 4 The fixing part 88 is provided with a fixing post 91, and the switching assembly 150 is provided with a mounting hole 94. The switching assembly 150 is first positioned by corresponding the fixing post 91 through the mounting hole 94, and the fixing post 91 is passed through the mounting hole 94. This allows for precise determination of the position of the switching assembly 150 on the fixing part 88. Then, a fastener 97 is passed through the mounting hole 94 and connected to the fixing post 91. This allows the mounting hole 94 and the fixing post 91 to be fixedly connected, ensuring that the switching assembly 150 is stably placed on the pot lid 300, reducing the risk of movement or tilting during transportation or use to a certain extent. The fastener 97 includes, but is not limited to, screws, bolts, rivets, etc. Optionally, in Figure 4 In the middle, the fastener 97 is a screw, which makes the switching assembly 150 detachably connected to the fixing part 88.

[0101] This embodiment of the invention does not specifically limit the number of fixing posts 91, mounting holes 94, and fasteners 97. In one example, there are three fixing posts 91, three mounting holes 94, and three fasteners 97. One fixing post 91 corresponds to one mounting hole 94, and also corresponds to one fastener 97.

[0102] In an optional embodiment, one of the fixing part 88 and the switching assembly 150 is provided with a screw hole 100, and the other is provided with a stud 103. The fixing part 88 and the switching assembly 150 are connected by the stud 103 and the screw hole 100 cooperating with each other.

[0103] Thus, the stud 103 and the screw hole 100 cooperate with each other to connect the switching assembly 150 and the fixing part 88, which has the flexibility and maintainability of connection.

[0104] Specifically, please combine Figure 5 In this embodiment of the invention, the fixing part 88 is provided with a screw hole 100, and the switching component 150 is provided with a stud 103. The fixing part 88 and the switching component 150 are connected by the mutual cooperation of the stud 103 and the screw hole 100. In other embodiments, the fixing part 88 may be provided with a stud 103, and the switching component 150 may be provided with a screw hole.

[0105] In some embodiments, the vent area of ​​the vent 17 is configured to enable pressureless cooking when the vent 17 is open.

[0106] In this way, the exhaust area can meet the exhaust requirements of cooking appliances in pressureless cooking mode, so that pressureless cooking can be achieved without reducing the power of cooking appliances, thus improving the user experience.

[0107] Specifically, in this embodiment of the invention, the cooking appliance can operate in a pressurized cooking mode and a pressureless cooking mode. In pressurized cooking mode, the switching component 150 can close the vent 17, sealing the cooking chamber 250, thereby allowing pressurized cooking of the food. In pressureless cooking mode, the switching component 150 can open the vent 17, allowing the cooking chamber 250 to communicate with the outside world through the vent 109, the through hole 106, and the vent 17, thereby allowing pressureless cooking of the food.

[0108] It should be noted that the pressureless cooking described in this invention refers to cooking with a pressure of less than or equal to 4 kPa within the cooking chamber 250 during operation. The venting area of ​​the vent 17 is configured to enable pressureless cooking when the vent 17 is open. The venting area of ​​the vent 17 can be understood as the opening area of ​​the vent 17. In one embodiment, when the vent 17 is fully open, the entire venting area of ​​the vent 17 is used for venting, enabling pressureless cooking. In another embodiment, when the vent 17 is partially open, a portion of the venting area of ​​the vent 17 is used for venting, enabling pressureless cooking.

[0109] When the vent 17 is opened to a certain size (fully or partially), the vent area of ​​the vent 17, which enables pressureless cooking, is related to the power of the cooking appliance. Generally, the higher the power of the cooking appliance, the larger the vent area of ​​the vent 17 required for pressureless cooking. The vent area of ​​the vent 17 corresponding to pressureless cooking at a certain appliance power can be determined through simulation, testing, and empirical values. In some examples, please refer to... Figure 15 , Figure 15 The relationship between the vent area of ​​the vent hole 17 and the power of the cooking appliance is shown under pressureless cooking (the pressure inside the cooking chamber 250 is 4 kPa).

[0110] Most pressure cookers with a pressure-free cooking mode achieve this by using a mechanism to open the existing gravity vent valve (such as a gravity hammer or gravity valve) during pressure-free cooking, separating the gravity vent valve from the vent valve core. Steam is then released through the vent channel in the vent valve core to achieve pressure-free cooking. However, because the vent channel area of ​​cooking appliances is very small, the amount of steam released is insufficient. Achieving pressure-free cooking would significantly reduce cooking power to prevent the generation of excessive steam that cannot be released in time to build up pressure, thus greatly prolonging cooking time and resulting in a poor user experience. If the vent channel area were directly increased, considering the need to seal the vent channel under high pressure, the weight and volume of the gravity vent valve would also increase significantly, making operation and switching difficult and hindering productization. Therefore, existing cooking appliances either cannot perform pressure-free cooking or have very low power for pressure-free cooking, and cannot maintain a pressure-free state with slightly higher power.

[0111] In this embodiment of the invention, the steam vent 17 of the pot lid assembly 400 has a steam vent area that can meet the steam venting requirements of the cooking appliance in the pressureless cooking mode, thereby enabling pressureless cooking without reducing the power of the cooking appliance and improving the user experience.

[0112] The venting area of ​​the vent 17 is S, and the upper limit of S can be determined based on factors such as the space configuration of the lid assembly 400, cost, and cooking requirements. In one example, the cooking appliance has a power of 2.2kW. The fixing member 11 is provided with at least one vent 17, and the venting area S of the vent 17 is greater than 12.9mm² to ensure effective control of the internal pressure during the cooking process.

[0113] When there is a single vent hole 17, the vent area S of a single vent hole 17 is greater than or equal to 12.9 mm². When there are multiple vent holes 17 (two or more), the total vent area S of all vent holes 17 is greater than or equal to 12.9 mm². The vent area of ​​each vent hole 17 can be the same or different, and no specific limitation is made here. This design, to a certain extent, ensures that when the cooking appliance is operating in pressureless cooking mode, steam can be quickly and safely discharged to the outside of the cooking chamber 250, thus enabling pressureless cooking even without reducing the heating power of the cooking appliance. The number of vent holes 17 can be specifically limited according to actual conditions, and this utility model does not make a specific limitation in this regard. In one example, please refer to... Figure 11 The number of exhaust holes 17 can be two. The exhaust area of ​​the exhaust hole 17 is an inherent property of the exhaust hole 17, which can be understood as the opening area of ​​the exhaust hole 17.

[0114] Please see Figures 12 to 14 The switching component 150 includes a movable part 14 and a fixed part 11, with a steam vent 17 disposed on the fixed part 11. The movable part 14 and the fixed part 11 can generate relative movement, allowing the first contact plane 26 and the second contact plane 29 to make close contact to open and close the steam vent 17. Opening the steam vent 17 refers to any state other than closing it. When the entire steam vent area of ​​the steam vent 17 is used for steam venting (the steam vent 17 is fully open), a pressureless cooking mode can be achieved, and the open area of ​​the steam vent 17 is equal to its steam vent area. When only a portion of the steam vent area of ​​the steam vent 17 is used for steam venting (the steam vent 17 is partially open), a pressurized cooking mode with different pressures can be achieved (i.e., an intermediate state between pressurized and pressureless cooking modes, i.e., a lower pressure cooking mode), and the open area of ​​the steam vent 17 is smaller than its steam vent area. With a fixed heating power of the cooking appliance, the larger the opening area of ​​the vent 17, the lower the pressure inside the cooking chamber 250.

[0115] Please combine Figure 12 The movable part 14 can close the vent 17 to seal the cooking chamber 250, preventing steam from escaping from the cooking appliance. The pressure inside the cooking chamber 250 is maintained at the level required for cooking. At this time, the opening area of ​​the vent 17 is zero. Figure 13In this process, the movable part 14 can open a portion of the vent 17, allowing the cooking chamber 250 to communicate with the outside through the vent 17. Some steam inside the cooking chamber 250 can escape from the cooking appliance. The pressure inside the cooking chamber 250 decreases as the area of ​​the vent 17 that is opened increases. At this point, the opening area of ​​the vent 17 is smaller than the venting area. Please refer to... Figure 14 The movable part 14 can fully open the vent 17, allowing the cooking chamber 250 to communicate with the outside through the vent 17. Most of the steam inside the cooking chamber 250 can escape from the cooking appliance, leaving the cooking chamber 250 in a pressureless state, enabling pressureless cooking. In this state, the opening area of ​​the vent 17 is equal to the venting area. In summary, in this embodiment of the invention, the cooking appliance can adjust the opening area of ​​the vent 17 through the relative movement between the second contact plane 29 of the movable part 14 and the first contact plane 26 of the fixed part 11. This allows the cooking appliance to switch between pressurized and pressureless cooking, and pressureless cooking can be achieved without reducing the power of the cooking appliance, thus improving the user experience.

[0116] In some embodiments, the switching component 150 is configured such that the movable part 14 rotates relative to the fixed part 11 to adjust the opening area of ​​the vent 17.

[0117] In this way, the pressure inside the cooking cavity 250 can be adjusted by the opening area of ​​the vent 17.

[0118] Specifically, adjusting the opening area of ​​the vent hole 17 can refer to adjusting the opening area of ​​the vent hole 17 while it is in the open state. In one example, the vent hole 17 is initially closed, and the relative movement of the movable part 14 and the fixed part 11 is controlled to open the vent hole 17. When the vent hole 17 is in the open state, the relative movement of the movable part 14 and the fixed part 11 is controlled to adjust the opening area of ​​the vent hole 17, for example, adjusting the opening area from 50%×S to 80%×S, where S is the vent area of ​​the vent hole 17.

[0119] Please combine Figure 12 The movable part 14 closes the vent 17, sealing the cooking chamber 250, and the pressure inside the cooking chamber 250 is maintained at the level required for cooking; Figure 13 In the middle, the movable part 14 opens a portion of the vent 17, and the pressure inside the cooking cavity 250 decreases as the opening area of ​​the vent 17 increases; please refer to Figure 14 In one embodiment, the movable part 14 fully opens the vent 17, and the entire vent area of ​​the vent 17 is used for venting steam, so that the cooking appliance can perform pressureless cooking.

[0120] In one embodiment, when the vent 17 is partially open, a portion of the vent area of ​​the vent 17 can be used for venting, enabling pressureless cooking. In such an embodiment, the movable member 14 can further reduce the opening area of ​​the vent 17 (greater than zero), enabling micro-pressure cooking (a low-pressure pressurized cooking mode). The movable member 14 can further increase the opening area of ​​the vent 17, enabling pressureless cooking.

[0121] For example, when the minimum opening area of ​​the vent 17 is 80% × S, a portion of the vent area of ​​the vent 17 can be used for venting, allowing the cooking appliance to achieve pressureless cooking (the pressure inside the cooking cavity 250 is less than or equal to 4 kPa). When the moving part 14 moves to make the opening area of ​​the vent 17 50% × S, the cooking appliance performs micro-pressure cooking (e.g., the pressure inside the cooking cavity is greater than 4 kPa). When the moving part 14 moves to make the opening area of ​​the vent 17 90% × S, the cooking appliance performs pressureless cooking, at which point the pressure inside the cooking cavity 250 is less than the pressure inside the cooking cavity 250 corresponding to an opening area of ​​80% × S.

[0122] In some embodiments, the cooking appliance satisfies at least one of the following: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; the materials of the fixing member 11 and the moving member 14 are hard materials with a Vickers hardness greater than or equal to 50 HV5; the surface roughness of the first contact plane 26 of the cooking appliance is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers; the surface roughness of the second contact plane 29 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers.

[0123] In this way, the switching effect between pressure cooking and non-pressure cooking can be guaranteed to a certain extent.

[0124] Specifically, in one embodiment, the cooking appliance has a steam vent area of ​​vent 17 that is greater than or equal to 19.5 mm² and less than or equal to 314 mm². In one embodiment, the cooking appliance has both the fixing member 11 and the moving member 14 made of a hard material with a Vickers hardness greater than or equal to 50 HV5. In one embodiment, the cooking appliance has a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the first contact plane 26, and a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the second contact plane 29.

[0125] In one embodiment, the cooking appliance satisfies the following conditions: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; the materials of the fixing member 11 and the movable member 14 are hard materials with a Vickers hardness greater than or equal to 50 HV5. In another embodiment, the cooking appliance satisfies the following conditions: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; the surface roughness and flatness of the first contact plane 26 are not greater than 3.2 micrometers; and the surface roughness and flatness of the second contact plane 29 are not greater than 3.2 micrometers. In yet another embodiment, the cooking appliance satisfies the following conditions: the materials of the fixing member 11 and the movable member 14 are hard materials with a Vickers hardness greater than or equal to 50 HV5; the surface roughness and flatness of the first contact plane 26 are not greater than 3.2 micrometers; and the surface roughness and flatness of the second contact plane 29 are not greater than 3.2 micrometers.

[0126] In one embodiment, the cooking appliance simultaneously satisfies the following conditions: the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm²; the materials of the fixing member 11 and the moving member 14 are hard materials with a Vickers hardness greater than or equal to 50 HV5; the surface roughness of the first contact plane 26 of the cooking appliance is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers; and the surface roughness of the second contact plane 29 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers.

[0127] Please combine Figures 12 to 14 The vent 17 is located on the fixed member 11, which is fixed, while the movable member 14 is movable. The movable member 14 moves relative to the fixed member 11, thereby opening the vent 17 to allow the cooking chamber 250 to communicate with the outside through the vent 17. The vent 17 is the channel for steam to escape from the cooking chamber 250 to the outside, releasing pressure. When the cooking appliance is operating at high power, if the vent area of ​​the vent 17 is too small, a pressure-free cooking mode cannot be achieved without reducing the power of the cooking appliance. If the vent area of ​​the vent 17 is too large, the required size of the switching component 150 will be too large, and the manufacturing cost will be high. Therefore, an appropriate vent area of ​​the vent 17 ensures that the cooking appliance can quickly reach and maintain a pressure-free state during high-power cooking, thereby improving cooking efficiency. In this embodiment of the invention, the steam vent 17 has a steam vent area greater than or equal to 19.5 mm² and less than or equal to 314 mm², which allows the cooking appliance to remain in a pressure-free state when operating at high power (so that the pressure inside the cooking cavity 250 can be less than 1 kPa), providing a rapid and uniform heating effect for food to a certain extent.

[0128] When the vent 17 is fully open, the vent area of ​​the vent 17 is S. S is greater than or equal to 19.5 mm² and less than or equal to 314 mm², that is, 19.5 mm² ≤ S ≤ 314 mm². In some examples, S = 19.5 mm², 49 mm², 78.5 mm², 108 mm², 137.5 mm², 167 mm², 196.5 mm², 255.5 mm², 285 mm², 314 mm², or other values ​​greater than or equal to 19.5 mm² and less than or equal to 314 mm².

[0129] When the cooking appliance is in operation, especially in pressurized cooking mode, significant pressure is generated inside the cooking cavity 250. This high pressure acts on the fixed component 11 and the movable component 14. Therefore, the materials of the fixed component 11 and the movable component 14 can be made of rigid materials that can withstand high pressure without easily or easily deforming or being damaged, in order to extend their service life. The Vickers hardness of the rigid material is greater than or equal to 50HV5.

[0130] This invention does not specifically limit the materials of the fixing member 11 and the moving member 14. Vickers hardness is a method for measuring the hardness of a material; the higher the Vickers hardness value, the greater the hardness of the material. In this embodiment of the invention, the hard material used for the fixing member 11 and the moving member 14 has a Vickers hardness greater than or equal to 50HV5, exhibiting good wear resistance and the ability to resist friction and wear, while also possessing strong compressive strength, capable of withstanding significant pressure without deformation or damage.

[0131] The Vickers hardness H of rigid materials is greater than or equal to 50HV5, that is, H≥50HV5. In some examples, H=50HV5, 52HV5, 54HV5, 56HV5, 58HV5, or other values ​​greater than or equal to 50HV5. The upper limit of H can be determined based on factors such as the manufacturing process and cost of the moving part 14 and the fixed part 11.

[0132] Specifically, please combine Figures 12 to 14The fixed component 11 and the movable component 14 are stacked and arranged using a mechanical seal. The switching component 150 is mounted on the lid 300 via the first sealing ring 35. Under the pressure provided by the first sealing ring 35 and the pressure inside the cooking cavity 250, the first contact surface 26 of the cooking appliance and the second contact surface 29 are tightly fitted together, forming a sealing effect at the contact surface. At the same time, the movable component 14 moves planarly on the fixed component 11, which can open or close the vent 17. In order to make the relative movement between the fixed component 11 and the movable component 14 smoother, and to make the first contact surface 26 of the cooking appliance and the second contact surface 29 form a better sealing effect, the surface roughness and flatness of the first contact surface 26 of the cooking appliance and the second contact surface 29 have certain requirements. The smaller the surface roughness and flatness, the smoother and flatter the contact surface. Because the two contact surfaces are very smooth, the coefficient of friction μ between them is very low (usually less than 0.5). The original switching force F1 = pressure inside the pot P * area of ​​the vent S is reduced to the switching force F2 = pressure inside the pot P * area of ​​the vent S * coefficient of friction μ, which greatly reduces the operating force and makes it easier to switch between pressurized and unpressurized cooking to a certain extent.

[0133] In this embodiment of the invention, the surface roughness of the first contact plane 26 of the cooking appliance is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers; the surface roughness of the second contact plane 29 is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers, thereby making the relative movement between the fixed member 11 and the movable member 14 smoother, and making the first contact plane 26 of the cooking appliance and the second contact plane 29 form a better sealing effect.

[0134] Surface roughness R is no greater than 3.2 micrometers, i.e., R ≤ 3.2 micrometers. In one example, R = 3.2 micrometers, 3.0 micrometers, 2.8 micrometers, 2.6 micrometers, 2.4 micrometers, 2.2 micrometers, 2.0 micrometers, or any other value no greater than 3.2 micrometers. Flatness F is no greater than 3.2 micrometers, i.e., F ≤ 3.2 micrometers. In one example, F = 3.2 micrometers, 3.0 micrometers, 2.8 micrometers, 2.6 micrometers, 2.4 micrometers, 2.2 micrometers, 2.0 micrometers, or any other value no greater than 3.2 micrometers. The lower limits of R and F can be determined based on factors such as manufacturing process and cost.

[0135] Optionally, the surface roughness and flatness of the first contact plane 26 of the cooking appliance may be the same as or different from the surface roughness and flatness of the second contact plane 29.

[0136] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0137] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cooking utensil, characterized in that, include: A pot lid assembly, comprising a switching component and a pot lid, wherein the pot lid is provided with a steam vent, the switching component is disposed on the pot lid and covers the steam vent, the switching component includes a movable part, a first sealing ring and a steam vent, the movable part is used to open and close the steam vent during movement, and the switching component is sealed to the pot lid through the first sealing ring, the first sealing ring being provided with a through hole; The pot body has a cooking cavity formed inside the pot body, and the pot lid assembly covers the cooking cavity. The cooking cavity is connected to the steam vent through the steam vent and the through hole in sequence. Along the height direction of the cooking appliance, the projection positions of the steam vent and the through hole on the pot lid are located within the range of the steam vent.

2. The cooking utensil according to claim 1, characterized in that, The diameter of the steam inlet is not less than the diameter of the steam outlet and not less than the diameter of the through hole.

3. The cooking utensil according to claim 1, characterized in that, The switching component includes a fixing member. In the height direction of the cooking appliance, along the direction away from the cooking cavity, the first sealing ring, the fixing member, and the movable member are stacked in sequence. The fixing member is provided with the steam vent. The fixing member includes a first contact plane, and the moving member includes a second contact plane, wherein the first contact plane and the second contact plane are parallel to and in contact with each other.

4. The cooking utensil according to claim 3, characterized in that, The movable component is capable of rotating relative to the fixed component on the first contact plane to open and close the vent hole, and the opening of the vent hole on the first contact plane is located on the movement path of the movable component.

5. The cooking utensil according to claim 4, characterized in that, The switching assembly includes a housing and an operating component. The housing has a receiving cavity, and the movable component, the fixed component, and the first sealing ring are disposed in the receiving cavity. A portion of the operating component is located in the receiving cavity and connected to the movable component, while another portion extends out of the receiving cavity. The operating component is configured to drive the movable component to rotate relative to the fixed component during movement.

6. The cooking utensil according to claim 5, characterized in that, One of the movable component and the operating component is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block and the first limiting groove are connected in cooperation so that when the operating component moves, the movable component is driven to rotate through the cooperation of the first limiting block and the first limiting groove.

7. The cooking utensil according to claim 5, characterized in that, One of the sidewalls of the accommodating cavity and the fixing member is provided with a second limiting groove, and the other is provided with a second limiting block. The second limiting block is embedded in the second limiting groove so that the housing limits the fixing member.

8. The cooking utensil according to claim 5, characterized in that, The pot lid is provided with a fixing part, and the shell is fixedly connected to or detachably connected to the fixing part.

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

10. The cooking utensil according to claim 3, characterized in that, The switching component is configured such that the movable part rotates relative to the fixed part to adjust the opening area of ​​the vent hole.

11. The cooking utensil according to claim 3, characterized in that, The cooking appliance satisfies at least one of the following: the steam vent area is greater than or equal to 19.5 mm². 2 And less than or equal to 314mm 2 ; The materials of the fixing member and the moving member are hard materials, and the Vickers hardness of the hard materials is greater than or equal to 50HV5; The surface roughness of the first contact plane is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers; the surface roughness of the second contact plane is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers.

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