Cover body and cooking utensil

Abstract

The invention discloses a cover body and a cooking utensil. The cooking utensil comprises a pot body, the pot body comprises a cooking cavity used for containing food materials, and the cooking cavity is provided with a cooking cavity opening used for taking and placing the food materials. The cover body is used for covering the cooker body. The cover body comprises an anti-overflow cavity and a steam exhaust through hole. And the bottom wall of the anti-overflow cavity is used for covering the opening of the cooking cavity when the cover body covers the cooker body. The bottom wall of the anti-overflow cavity comprises a bottom wall second part and a bottom wall fourth part, and the bottom wall second part is higher than the bottom wall fourth part. A plurality of bottom wall through holes for communicating the anti-overflow cavity with the cooking cavity are formed in the bottom wall of the anti-overflow cavity, and the bottom wall through holes comprise at least one first bottom wall through hole and at least one second bottom wall through hole. Wherein the first bottom wall through hole is formed in the second part of the bottom wall, the second bottom wall through hole is formed in the fourth part of the bottom wall, and the first bottom wall through hole is smaller than the second bottom wall through hole. The steam exhaust through hole is communicated with the anti-overflow cavity and the outside, and the second bottom wall part is closer to the steam exhaust through hole than the fourth bottom wall part.

Description

Technical Field

[0001] This application relates to the field of cooking utensil technology, and more specifically to a lid for a cooking utensil and a cooking utensil including the lid. Background Technology

[0002] Existing anti-overflow structures for cooking appliances generally fall into two categories: one prevents overflow by collecting condensate through a cavity channel, and the other prevents overflow by storing foam through a cavity channel and then breaking that foam. However, both of these anti-overflow structures have unsatisfactory foam-breaking effects, resulting in poor anti-overflow performance and a poor user experience.

[0003] Therefore, there is a need for a lid and cooking appliance to at least partially solve the above problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, a first aspect of this application provides a lid for a cooking utensil, the cooking utensil including a pot body, the pot body including a cooking cavity for holding food, the cooking cavity having a cooking cavity opening for taking out and placing food, the lid for covering the pot body, the lid including:

[0006] An overflow-proof cavity, the bottom wall of which covers the opening of the cooking cavity when the lid closes the pot body, the bottom wall includes a second part and a fourth part, the second part being higher than the fourth part, and the bottom wall having multiple through holes for communicating between the overflow-proof cavity and the cooking cavity, the through holes including at least one first through hole and at least one second through hole, wherein the first through hole is located in the second part of the bottom wall, the second through hole is located in the fourth part of the bottom wall, and the first through hole is smaller than the second through hole; and

[0007] The steam vent is configured to communicate with both the overflow prevention cavity and the outside environment.

[0008] The second part of the bottom wall is closer to the exhaust port than the fourth part of the bottom wall.

[0009] According to this application, by setting an overflow-proof cavity in the cover, overflow energy can be absorbed and overflow bubbles can be stored, thereby achieving overflow prevention. By setting first and second bottom wall through holes of different sizes to connect the overflow-proof cavity, bubbles and steam can enter the overflow-proof cavity through different bottom wall through holes, achieving gas-liquid separation. This allows the steam in the overflow-proof cavity to break the foam in the overflow-proof cavity, improving the overflow prevention effect. The first bottom wall through hole is higher than the second bottom wall through hole, which facilitates the formation of a pressure difference between the two, promoting gas to enter the overflow-proof cavity through the first bottom wall through hole. The second bottom wall through hole is lower, which allows bubbles to preferentially enter the overflow-proof cavity through the second bottom wall through hole. The first bottom wall through hole is closer to the steam exhaust hole than the second bottom wall through hole, so that the gas entering from the first bottom wall through hole can impact the bubbles moving from the second bottom wall through hole to the steam exhaust hole, breaking the bubbles. The liquid generated after bubble breaking can flow back from the second bottom wall through hole, further improving the overflow prevention effect.

[0010] Optionally, the distance between the edge of the first bottom wall through hole and the edge of the second bottom wall through hole is not less than 10 mm.

[0011] According to this application, the edge of the first bottom wall through hole and the edge of the second bottom wall through hole are at a certain distance, which ensures that the bubble (foam) entering from the second bottom wall through hole has enough movement distance, reduces the kinetic energy of the bubble (foam) when it moves to the first bottom wall through hole, and also enables the foam to cool down and reduce the risk of overflow.

[0012] Optionally, the line connecting the first bottom wall through hole and the second bottom wall through hole has a first included angle with the horizontal plane, and the first included angle is greater than or equal to 5°.

[0013] According to this application, in order to facilitate the backflow of liquid from the second bottom wall through hole, the line connecting the first bottom wall through hole and the second bottom wall through hole needs to form a certain angle with the horizontal plane.

[0014] Optionally, the height difference between the lowest point of the first bottom wall through hole and the highest point of the second bottom wall through hole is greater than or equal to 3 mm.

[0015] According to this application, there is a certain height difference between the first bottom wall through hole and the second bottom wall through hole, which ensures that the foam does not contact the first bottom wall through hole and avoids affecting the overflow prevention effect.

[0016] Optionally, the area of ​​each of the first bottom wall through holes ranges from [1.77 mm²]. 2 20mm 2 ]; and / or

[0017] The area of ​​each second bottom wall through hole ranges from [20mm]. 2 300mm 2 ].

[0018] According to this application, by limiting the individual areas of the first bottom wall through hole and the second bottom wall through hole, the first bottom wall through hole can better block the air bubbles (foam) in the pot, preventing the air bubbles from escaping from the first bottom wall through hole and causing the pot to overflow, thereby achieving gas-liquid separation. At the same time, it increases the steam flow velocity at the first bottom wall through hole, making it easier for the steam to break through the air bubbles in the anti-overflow cavity.

[0019] Optionally, the total area of ​​the first bottom wall through hole ranges from [50mm]. 2 200mm 2 ]; and / or

[0020] The total area of ​​the second bottom wall through hole ranges from [100mm²]. 2 1000mm 2 ].

[0021] According to this application, by limiting the total area of ​​the first bottom wall through hole and the second bottom wall through hole, the capacity of the overflow prevention cavity to receive steam and foam can be balanced, thereby achieving a better overflow prevention effect.

[0022] Optionally, the number of the first bottom wall through holes is 10 to 64, and / or

[0023] The number of through holes in the second bottom wall is 5 to 30.

[0024] According to this application, by limiting the number of first bottom wall through holes and second bottom wall through holes, the overflow prevention cavity's ability to receive steam and foam can be balanced, achieving a better overflow prevention effect.

[0025] Optionally, the ratio of the total area of ​​the second bottom wall through hole to the total area of ​​the first bottom wall through hole is a second ratio, and the value of the second ratio is in the range of [2,5].

[0026] According to this application, by limiting the ratio of the total area of ​​the second bottom wall through hole to the total area of ​​the first bottom wall through hole, the ability of the overflow prevention cavity to receive steam and foam can be balanced, thereby achieving a better overflow prevention effect.

[0027] Optionally, the second part of the bottom wall and the fourth part of the bottom wall are arranged along the radial direction of the bottom wall, and the fourth part of the bottom wall surrounds the outer periphery of the second part of the bottom wall.

[0028] According to this application, the fourth part of the bottom wall and the second part of the bottom wall are arranged in the radial direction to adapt to the cross-sectional shape of the cooking cavity, which is beneficial for preventing overflow.

[0029] Optionally, the second bottom wall through hole is located at the lowest position of the bottom wall, and / or,

[0030] The bottom wall through hole includes a plurality of second bottom wall through holes, which are evenly arranged in the circumferential direction on the bottom wall.

[0031] According to this application, the second bottom wall through-hole is located at the lowest point of the bottom wall, facilitating the maximum height difference between the first and second bottom wall through-holes. Multiple second bottom wall through-holes are evenly arranged circumferentially on the bottom wall, facilitating the entry of air bubbles into the overflow prevention cavity and liquid backflow.

[0032] Optionally, the bottom wall further includes a third part, which is an annular region located between the first bottom wall through hole and the second bottom wall through hole along the radial direction.

[0033] According to this application, a third bottom wall is provided between the second bottom wall and the fourth bottom wall, which facilitates increasing the distance between the first bottom wall through hole and the second bottom wall through hole.

[0034] Optionally, in the cross section of the cover body that passes through the geometric center point of the second bottom wall and extends in the vertical direction, the third bottom wall includes two sub-bottom wall third parts located on both sides of the geometric center point of the second bottom wall, wherein each of the sub-bottom wall third parts has an arbitrary first position point and a second position point, wherein when the first position point is closer to the second bottom wall than the second position point, the first position point is not lower than the second position point.

[0035] According to this application, both sub-bottom wall third parts of the bottom wall third part are constructed to extend downward from the bottom wall second part to the bottom wall fourth part, forming an upwardly convex conical structure on the bottom wall of the overflow prevention cavity, thereby creating a pressure difference between the first bottom wall through hole and the second bottom wall through hole, facilitating the discharge of steam through the first bottom wall through hole. At the same time, it facilitates the return of liquid to the position of the second bottom wall through hole after the bubbles are broken.

[0036] Optionally, in the axial section of the cover body that passes through the geometric center point of the second part of the bottom wall and extends in the vertical direction, the third part of the sub-bottom wall is one of a straight line, a curve, and a broken line, or the third part of the sub-bottom wall is a combination of a straight line and a curve.

[0037] According to this application, the geometry of the third part of the sub-bottom wall has multiple options, which facilitates processing and can meet different practical needs.

[0038] Optionally,

[0039] The third part of the bottom wall is provided with at least one groove extending in the radial direction.

[0040] According to this application, the third part of the bottom wall is provided with at least one groove extending in the radial direction, so that after the bubbles are broken, the liquid flows back into the cooking cavity from the through hole of the second bottom wall along the groove extending in the radial direction.

[0041] Optionally, the third part of the bottom wall is provided with a sensor through hole for the sensor to pass through.

[0042] According to this application, a sensor through-hole is provided to facilitate the sensor passing through the bottom wall to detect various parameters inside the cooking space.

[0043] Optionally, the second part of the bottom wall is constructed as a ring-shaped region.

[0044] The bottom wall further includes a first part of the bottom wall, which is disposed inside the second part of the bottom wall along the radial direction.

[0045] The first part of the bottom wall is a non-porous region.

[0046] According to this application, the first part of the bottom wall is constructed as a non-porous area to prevent air bubbles from directly reaching the exhaust hole from the first part of the bottom wall, thus preventing overflow.

[0047] Optionally, the cover further includes a venting component configured to communicate with the outside, and the venting component is disposed above the first part of the bottom wall.

[0048] The exhaust component is provided with an exhaust port that connects to the overflow prevention cavity, thereby the overflow prevention cavity is configured to communicate with the outside through the exhaust component.

[0049] According to this application, by setting the exhaust port in the exhaust component, the flexibility of the exhaust port design can be improved.

[0050] Optionally, the exhaust component includes an exhaust chamber extending in the vertical direction, the exhaust chamber communicating with the outside, and the exhaust through hole being disposed on the side wall of the exhaust chamber.

[0051] According to this application, the exhaust port is provided on the side wall of the exhaust chamber, so that the side wall can block the air bubbles accumulated at the first bottom wall through hole from entering the exhaust chamber.

[0052] Optionally, the total area of ​​the exhaust holes is not less than the total area of ​​the first bottom wall through holes; and / or

[0053] The height difference between the lower edge of the exhaust port and the bottom of the exhaust component is at least 5 mm.

[0054] According to this application, the total area of ​​the exhaust through-hole is not less than the total area of ​​the first bottom wall through-hole, so that the steam discharged from the first bottom wall through-hole can smoothly enter the exhaust chamber. The lower edge of the exhaust through-hole has a certain height difference with the bottom of the exhaust component to prevent any unbroken air bubbles from the first bottom wall through-hole from overflowing from the exhaust through-hole.

[0055] Optionally, the exhaust port includes a first exhaust port and a second exhaust port, which are staggered on the side wall of the exhaust chamber along both the circumferential and vertical directions of the exhaust chamber.

[0056] According to this application, the first and second steam vents are staggered in both the circumferential and vertical directions, thereby further breaking up some of the bubbles in the exhaust chamber that did not have time to be broken by gas impact through the change of the exhaust channel.

[0057] Optionally, the first part of the bottom wall includes a platform area, and the exhaust component is disposed above the platform area.

[0058] According to this application, the exhaust component is located above the platform area, which facilitates control of the distance between the bottom of the exhaust component and the first part of the bottom wall.

[0059] Optionally, the distance between the edge of the first bottom wall through hole and the edge of the platform area ranges from [1mm, 10mm].

[0060] According to this application, the first bottom wall through-hole and the platform area are kept at an appropriate distance. If the distance is too large, it will affect the entry of steam from the first bottom wall through-hole into the exhaust chamber, which is not conducive to the preferential discharge of steam and the breaking of gas bubbles. If the distance is too small, the first bottom wall through-hole and the second bottom wall through-hole will be too close, which will reduce the rising distance of the foam and is not conducive to preventing overflow.

[0061] Optionally, the bottom wall of the exhaust chamber is provided with a reflux hole.

[0062] According to this application, the bottom wall of the exhaust chamber is provided with a reflux hole to facilitate the backflow of liquid generated when bubbles burst upon entering the exhaust chamber.

[0063] Optionally, the outer diameter of the bottom wall of the exhaust chamber is not greater than the width of the platform area; and / or

[0064] The height difference between the lower surface of the bottom wall of the exhaust chamber and the platform area is no greater than 3mm.

[0065] According to this application, the outer diameter of the bottom wall of the exhaust chamber is not greater than the width of the platform area, which can prevent air bubbles at the first bottom wall through hole from overflowing into the exhaust chamber through the return hole at the bottom of the anti-overflow valve. The distance between the lower surface of the bottom wall of the exhaust chamber and the platform area should not be too large, which can prevent air bubbles at the first bottom wall through hole from entering the gap between the exhaust chamber and the platform area and overflowing directly into the exhaust chamber through the return hole at the bottom of the anti-overflow valve.

[0066] Optionally, the ratio of the width of the platform area to the width of the bottom wall is a third ratio, and the value of the third ratio is in the range of [1 / 20, 1 / 5].

[0067] According to this application, if the third ratio is too small, the foam bursting point will be too close to the venting component, causing the foam to overflow from the venting component. If the third ratio is too large, the foam will move too little distance in the overflow prevention cavity, affecting the overflow prevention effect.

[0068] Optionally, in the projection of the cover body along the vertical direction, the geometric center point of the second part of the bottom wall may or may not coincide with the geometric center point of the bottom wall.

[0069] According to this application, the geometric center point of the second part of the bottom wall coincides with or deviates from the geometric center point of the bottom wall, which facilitates the adjustment of the position of the second part of the bottom wall on the bottom wall according to the specific structure of the cover (e.g., the position of the steam valve), thereby improving the overflow prevention effect.

[0070] Optionally, the fourth part of the bottom wall is an annular region centered at the geometric center point of the bottom wall.

[0071] According to this application, the fourth part of the bottom wall is centered on the geometric center point of the bottom wall, which facilitates the uniform entry of air bubbles into the overflow prevention cavity.

[0072] Optionally, the fourth part of the bottom wall is configured to extend along a plane.

[0073] According to this application, the fourth part of the bottom wall extends along the plane and is easy to process.

[0074] Optionally, in a cross section of the cover that passes through the geometric center point of the second part of the bottom wall and extends in the vertical direction, the second part of the bottom wall extends along an inclined straight line, and the inclined straight line intersects with the inner edge of the fourth part of the bottom wall.

[0075] According to this application, the second part of the bottom wall is easy to process.

[0076] Optionally, the bottom wall through hole can be circular, elliptical, or polygonal in shape.

[0077] According to this application, the shape of the bottom wall through hole can be selected in a variety of ways, which is convenient for processing and can meet a variety of different practical needs.

[0078] Optionally, in the vertical projection of the cooking appliance, at least a portion of the first bottom wall through hole is located between the second bottom wall through hole and the steam vent hole.

[0079] According to this application, at least a portion of the first bottom wall through hole is located between the second bottom wall through hole and the steam vent hole, ensuring that the foam will come into contact with steam when it moves toward the steam vent hole, so that the gas discharged from the first bottom wall through hole will break the bubbles (foam) that have accumulated in the second bottom wall through hole and are near the first bottom wall through hole.

[0080] A second aspect of this application provides a cooking utensil, comprising:

[0081] A pot body, the pot body including a cooking cavity for holding food ingredients, the cooking cavity having a cooking cavity opening for loading and unloading food ingredients; and

[0082] The lid according to any one of the first aspects is used to cover the pot body.

[0083] According to this application, by incorporating an overflow-prevention cavity into the lid of a cooking appliance, overflow energy can be absorbed and overflow bubbles stored, thereby preventing overflow. By connecting the overflow-prevention cavity with first and second bottom wall through-holes of different sizes, bubbles and steam can enter the cavity through different bottom wall through-holes, achieving gas-liquid separation. This allows steam in the overflow-prevention cavity to break up the foam within, enhancing the overflow-prevention effect. The first bottom wall through-hole is higher than the second, facilitating a pressure difference between them and promoting gas entry into the overflow-prevention cavity through the first through-hole. The second bottom wall through-hole is lower, allowing bubbles to preferentially enter the overflow-prevention cavity through it. The first bottom wall through-hole is closer to the vent hole than the second, allowing gas entering through the first through-hole to impact and break bubbles moving from the second through-hole towards the vent hole. The resulting liquid can then flow back through the second bottom wall through-hole, further enhancing the overflow-prevention effect. Attached Figure Description

[0084] The following drawings, which are incorporated herein by reference as part of this application, are provided for understanding the application. The drawings illustrate representative embodiments of the application and are used to explain the principles of the application, not to limit it.

[0085] In the attached image:

[0086] Figure 1 This is a perspective view of a cooking appliance according to a specific embodiment of this application;

[0087] Figure 2 A side cross-sectional view of a cooking appliance according to the first embodiment of this application, wherein part of the pot body structure is omitted;

[0088] Figure 3 for Figure 2 A side sectional view of the cover body;

[0089] Figure 4 for Figure 2 A 3D illustration of the removable cover;

[0090] Figure 5 for Figure 2 A bottom view illustration of the removable cover;

[0091] Figure 6 for Figure 2 A top view of the removable cover;

[0092] Figure 7 for Figure 2 A side sectional view of the removable cover;

[0093] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point A;

[0094] Figure 9 for Figure 3 A bottom view of the cover plate;

[0095] Figure 10 for Figure 3 A side view of the cover plate in the middle;

[0096] Figure 11 for Figure 3 A side view of the first example of a deformation of the cover plate;

[0097] Figure 12 for Figure 3 A side view of a second variation of the cover plate;

[0098] Figure 13 for Figure 3 A side view of an example of the third deformation of the cover plate;

[0099] Figure 14 for Figure 3 A side view of the fourth variation of the cover plate in the diagram;

[0100] Figure 15 for Figure 3 A top view of the fifth variation of the cover plate in the diagram;

[0101] Figure 16 for Figure 3 A top view of the sixth variation of the cover plate in the diagram;

[0102] Figure 17 for Figure 2 A three-dimensional schematic diagram of the exhaust components;

[0103] Figure 18 for Figure 2 A side sectional view of the exhaust components;

[0104] Figure 19 for Figure 2 A top view of the exhaust components;

[0105] Figure 20 for Figure 2 A bottom view of the exhaust components;

[0106] Figure 21 for Figure 2 A three-dimensional schematic diagram of a modified example of the exhaust component in the process;

[0107] Figure 22 for Figure 21 A front sectional view of the exhaust components;

[0108] Figure 23 for Figure 21 Another three-dimensional schematic diagram of the exhaust components;

[0109] Figure 24 This is a side cross-sectional schematic diagram of the lid of a cooking appliance according to the second embodiment of this application;

[0110] Figure 25 This is a side cross-sectional view of a cooking appliance according to the third embodiment of this application, wherein part of the pot body structure is omitted;

[0111] Figure 26 for Figure 25 A side view of the cover plate in the middle;

[0112] Figure 27 This is a side cross-sectional schematic diagram of the lid of a cooking appliance according to the fourth embodiment of this application;

[0113] Figure 28 for Figure 27 A 3D illustration of the removable cover;

[0114] Figure 29 for Figure 27 A side sectional view of the removable cover;

[0115] Figure 30 for Figure 27 A top view of the removable cover;

[0116] Figure 31 for Figure 27 A bottom view illustration of the removable cover;

[0117] Figure 32 for Figure 27 An enlarged schematic diagram of the structure at point B in the diagram;

[0118] Figure 33 for Figure 27 The diagram shows a removable cover, omitting the bottom cover.

[0119] Figure 34 for Figure 27 A cross-sectional view of the removable cover, omitting the lower cover plate;

[0120] Figure 35 for Figure 27 A three-dimensional schematic diagram of the lower cover plate, wherein a cover plate sealing ring is fitted onto the flange of the lower cover plate;

[0121] Figure 36 for Figure 27 A cross-sectional view of the lower cover plate, wherein a cover plate sealing ring is fitted onto the flange of the lower cover plate.

[0122] Explanation of reference numerals in the attached figures:

[0123] 10 / 110 / 210 / 310: Cover

[0124] 11: Liner

[0125] 12: Partition

[0126] 13: Cover

[0127] 14: Faceplate sealing ring

[0128] 15: Overflow prevention cavity

[0129] 16: Top Temperature Sensor

[0130] 18: Liner for venting chamber

[0131] 19: Supporting reinforcement

[0132] 20 / 220 / 320: Bottom wall of the overflow prevention cavity

[0133] 21: Bottom Wall Part 1

[0134] 21A: Platform Area

[0135] 22: Bottom Wall Part Two

[0136] 23: Part Three of the Bottom Wall

[0137] 23A: Part Three of the Substructure

[0138] 24: Part Four of the Bottom Wall

[0139] 25: Bottom wall through hole

[0140] 25A: First bottom wall through hole

[0141] 25B: Second bottom wall through hole

[0142] 26: Sensor through hole

[0143] 30 / 130: Exhaust components

[0144] 30A: Exhaust chamber

[0145] 31: Side wall of the exhaust chamber

[0146] 32: Bottom wall of the exhaust chamber

[0147] 33: Exhaust port

[0148] 33A: First row of steam vents

[0149] 33B: Second row of steam vents

[0150] 34: Return hole

[0151] 39: Outer flange

[0152] 40 / 240 / 340: Removable lid

[0153] 41 / 241: Cover plate

[0154] 41A: Cover plate sidewall

[0155] 41B: Cover plate mounting section

[0156] 41C: Step section

[0157] 41D: Cover plate mounting hole

[0158] 41E: Connecting hole

[0159] 41F: Upper end of sidewall

[0160] 41G: Lower end of sidewall

[0161] 41H / 241H / 341H: Bottom wall of cover plate

[0162] 41J: Flange

[0163] 42: First sealing ring

[0164] 42A: First sealing part

[0165] 42B: First Installation Section

[0166] 42C: First mounting hole

[0167] 43: Pot rim sealing ring

[0168] 43A: Pot opening sealing part

[0169] 43B: Extension

[0170] 43C: First limiting part

[0171] 43D: Second limiting part

[0172] 43E: First Support Section

[0173] 43F: Second Support Section

[0174] 44: Pressure ring

[0175] 44B: Protrusion

[0176] 44C: Pressure ring mounting hole

[0177] 45: Flow guide channel

[0178] 46: Top cover plate

[0179] 46A: Liner sealing ring

[0180] 46B: Buckle

[0181] 46C: Exhaust vent on top cover plate

[0182] 46D: Reinforcing groove

[0183] 46E: Peripheral region

[0184] 47: Removable cover

[0185] 47A: Main body of the seat

[0186] 47C: Limiting groove

[0187] 47D: Fastener hole

[0188] 47E: Mounting slot

[0189] 48: Cover plate sealing ring

[0190] 51: Top cover plate connector

[0191] 51A: First connecting part

[0192] 51B: Second connecting part

[0193] 52: Lower cover plate connector

[0194] 52A: Connecting slot

[0195] 53: Connector base

[0196] 60: Claypot

[0197] 61: Cooking Cavity

[0198] 63: Cooking cavity opening

[0199] 64: Pot Inner Wall

[0200] 100 / 200: Cooking utensils

[0201] 341: Lower cover plate

[0202] DA: Axial direction

[0203] DC: Circumferential direction

[0204] DR: Radial direction Detailed Implementation

[0205] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0206] To fully understand this application, a detailed description will be provided in the following description. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0207] The ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” and the term “second component” does not imply the existence of a “first component.” The use of words such as “first,” “second,” and “third” does not indicate any order and can be interpreted as names.

[0208] It should be noted that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0209] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0210] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0211] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0212] like Figure 1 As shown, in a specific embodiment, the cooking appliance 100 according to this application may include a pot body 60 and a lid 10. The pot body 60 includes a pot inner 64. Typically, the pot body 60 may have a cylindrical (or other shaped) receiving cavity, and the pot inner 64 can be freely placed into or removed from the receiving cavity to facilitate cleaning of the pot inner 64. The pot inner 64 is made of, for example, a metal material and is constructed as a rotating body with an opening and an inner cavity formed by the pot wall. The capacity of the pot inner 64 is typically less than 6L, for example, the capacity of the pot inner 64 may be 2L or 4L, etc. The pot inner 64 has a pot inner 64 opening 63 for taking out and putting in food, and the internal space of the pot inner 64 forms a cooking cavity 61, which is used to hold and cook food. The volume of the pot inner 64 is the volume of the cooking cavity 61, and the pot inner 64 opening 63 is the opening 63 of the cooking cavity 61, also referred to as the cooking cavity opening 63.

[0213] The lid 10 is pivotally connected to the pot body 60 via a pivot shaft for sealing the pot body 60. For example... Figure 2 As shown, when the lid 10 covers the pot body 60, a cooking space is formed between the lid 10 and the inner pot 64. In different embodiments of this application, the relative positions of the lid 10 and the pot body 60 may differ when the lid 10 covers the pot body 60, therefore the cooking cavity 61 and the cooking space may not be exactly the same. For example, when the bottom portion of the lid 10 extends into the inner pot 64, the cooking space is part of the cooking cavity 61, and the volume of the cooking space is smaller than the volume of the cooking cavity 61.

[0214] The cooking appliance 100 has a heating device (not shown). The heating device is typically located at the bottom of the pot body 60, below the inner pot 64. The heating device is used to heat the inner pot 64 and the food therein, thereby achieving the cooking function. The heating device may be configured, for example, in the form of a heating plate.

[0215] The cooking appliance 100 has a top temperature sensor 16, which is typically located on the lid 10, for detecting the top temperature of the cooking space. A bottom temperature sensor is also located in the pot body 60 for detecting the bottom temperature of the cooking space.

[0216] In addition, the cooking appliance 100 also includes a control device (not shown) for controlling the cooking process. This control device may be, for example, a microcontroller unit (MCU), which is electrically connected to both the heating element and the temperature sensor, allowing the heating element to operate based on the temperature sensor's readings.

[0217] Cooking appliance 100 typically also includes a human-computer interaction device 70, which can be located on the pot body 60 or the lid 10 and connected to the control device. The human-computer interaction device 70 can facilitate user operation and provide users with information related to the cooking process.

[0218] It should be noted that, in this application, the directional terms “up” and “down” are those directions determined based on the cooking appliance 100 being placed upright with its lid 10 in a closed state.

[0219] It should be noted that although some structures of the cooking appliance 100 are illustrated here, these examples are merely exemplary and should not be construed as limiting the structure of the cooking appliance 100 in the embodiments of this application.

[0220] like Figure 2 As shown, the lid 10 has an overflow-prevention cavity 15 inside. The overflow-prevention cavity 15 is configured to communicate with the outside through a steam venting component 30 (e.g., a steam valve). When the lid 10 closes the pot body 60, the bottom wall 20 of the overflow-prevention cavity 15 covers the cooking cavity opening 63. In other words, the bottom wall 20 of the overflow-prevention cavity 15 forms the lower surface of the lid 10. The bottom wall 20 of the overflow-prevention cavity 15 is provided with at least one bottom wall through hole 25 for communicating with the cooking cavity 61. The overflow-prevention cavity 15 absorbs energy overflowing from the cooking cavity 61 and stores bubbles (foam) overflowing from the cooking cavity 61, thereby preventing overflow.

[0221] To improve the spill prevention effect, the volume of the spill prevention cavity 15 and the volume of the cooking cavity 61 must meet a certain relationship. Specifically, the ratio between the volume of the spill prevention cavity 15 and the volume of the cooking cavity 61 is a first ratio, which ranges from [1 / 40, 4 / 5], for example, 1 / 15. If the first ratio is too large, the volume of the spill prevention cavity 15 is relatively large compared to the volume of the cooking cavity 61, which not only increases the material cost of the spill prevention cavity 15 but also indirectly reduces the cooking space, resulting in low space utilization. If the first ratio is too small, the volume of the spill prevention cavity 15 is relatively small compared to the volume of the cooking cavity 61, which weakens the ability of the spill prevention cavity 15 to store air bubbles (foam), resulting in a poor spill prevention effect.

[0222] like Figure 2 and Figure 3As shown, in the first embodiment of this application, the lid 10 includes a top cover 13, a liner 11, and a removable cover 40. The liner 11 forms the skeleton of the lid 10, and various components of the lid 10 (e.g., the top temperature sensor 16 and the venting component 30) are mounted on the liner 11. The liner 11 is pivotally connected to the pot body 60, for example, so that the lid 10 can close the pot body 60. The top cover 13 forms the outer shell of the lid 10 and is mounted on the liner 11. The removable cover 40 is detachably connected to the liner 11 and is located at the bottom of the lid 10. The removable cover 40 is used to close the cooking cavity opening 63.

[0223] In the first embodiment, the removable cover 40 includes a cover plate 41, which is detachably connected to the liner 11 and covers the cooking cavity opening 63. The cover plate 41 is provided with a sensor through hole 26 for a top temperature sensor 16 to pass through, which can detect the temperature of the cooking space.

[0224] The liner 11 forms the top wall of the overflow-proof cavity 15. A partition 12 may also be provided on the lower surface of the liner 11, forming the top wall of the overflow-proof cavity 15. The partition 12 is, for example, a metal plate, such as an aluminum plate. The cover plate 41 includes a bottom wall 41H and a side wall 41A. The bottom wall 41H forms the bottom wall 20 of the overflow-proof cavity 15, and has at least one bottom wall through hole 25, thereby connecting the overflow-proof cavity 15 with the cooking cavity 61. The side wall 41A extends upward from the outer peripheral edge of the bottom wall 41H, forming the side wall of the overflow-proof cavity 15.

[0225] The removable cover 40 also includes a first sealing ring 42, which is connected to the upper end of the cover plate sidewall 41A. The first sealing ring 42 is made of, for example, an elastic material and is used to seal the lower surface of the contact liner 11, thereby forming an overflow-proof cavity 15 between the liner 11 and the cover plate 41. It can also be understood that the cover plate sidewall 41A and the first sealing ring 42 together constitute the sidewall of the overflow-proof cavity 15.

[0226] like Figures 2 to 8 As shown, the removable cover 40 also includes a pot opening sealing ring 43, which is disposed on the outer periphery of the cover plate 41. The pot opening sealing ring 43 is made of, for example, an elastic material, and is used to seal the contact cooking cavity opening 63, thereby forming a cooking space between the cover 10 and the cooking cavity 61.

[0227] like Figures 4 to 7As shown, to connect the cover plate 41, the first sealing ring 42, and the pot opening sealing ring 43, the removable cover 40 also includes a removable cover seat 47 and a pressure ring 44. The removable cover seat 47 is detachably mounted to the liner 11, and the cover plate 41, the first sealing ring 42, and the pot opening sealing ring 43 are all detachably connected to the removable cover seat 47, thereby being detachably connected to the liner 11. The pressure ring 44 is detachably connected to the removable cover seat 47 and is used to install the cover plate 41, the first sealing ring 42, and the pot opening sealing ring 43 to the removable cover seat 47.

[0228] like Figure 4 As shown, the removable cover 47 includes an annular seat body 47A. At least a portion of the cover sidewall 41A and at least a portion of the pot opening sealing ring 43 are surrounded by the inner circumferential surface of the seat body 47A. Specifically, as Figure 8 As shown, the cover sidewall 41A includes an upper end portion 41F and a lower end portion 41G, wherein the upper end portion 41F is located above the lower end portion 41G. The upper end portion 41F is surrounded by the inner circumferential surface of the seat body 47A. The pot opening sealing ring 43 includes a pot opening sealing portion 43A and an extension portion 43B. The pot opening sealing portion 43A is used to seal the contact cooking cavity opening 63. The extension portion 43B extends upward from the upper end of the pot opening sealing portion 43A, is constructed in an annular shape, and is surrounded by the inner circumferential surface of the seat body 47A. The extension portion 43B is located outside the upper end portion 41F in the radial direction DR, that is, the radial direction DR extension portion 43B is located between the seat body 47A and the upper end portion 41F.

[0229] The cover plate 41 also includes a cover plate mounting portion 41B, which extends radially outward from the upper edge of the upper end portion 41F of the side wall along the radial direction DR. The lower surface of the cover plate mounting portion 41B is connected to the upper surface of the seat body 47A. The pot opening sealing ring 43 also includes a first limiting portion 43C, which extends radially outward from the upper end of the extension portion 43B along the radial direction DR. The lower surface of the first limiting portion 43C is connected to the upper surface of the seat body 47A. Since the extension portion 43B is located outside the upper end portion 41F of the side wall along the radial direction DR, the first limiting portion 43C is located below the cover plate mounting portion 41B and is positioned between it and the seat body 47A in the vertical direction (i.e., the axial direction DA). The upper surface of the pot opening sealing portion 43A can abut against the lower surface of the seat body 47A, further limiting the pot opening sealing ring 43 relative to the removable cover seat 47 in the axial direction DA.

[0230] like Figure 8As shown, the first sealing ring 42 is located above the seat body 47A. The first sealing ring 42 is located above the cover plate 41. The first sealing ring 42 includes a first sealing portion 42A and a first mounting portion 42B, wherein the first sealing portion 42A is used to seal the contact liner 11, and the first mounting portion 42B extends outward from the lower end of the first sealing portion 42A in the radial direction DR. The lower surface of the first mounting portion 42B abuts against the upper surface of the cover plate mounting portion 41B. The pressure ring 44 contacts the seat body 47A from above (that is, the pressure ring 44 contacts the pot opening sealing ring 43 from above, the pressure ring 44 contacts the cover plate 41 from above, and the pressure ring 44 contacts the seat first sealing ring 42 from above), clamping the first sealing ring 42, the cover plate 41, and the pot opening sealing ring 43 between the pressure ring 44 and the seat body 47A of the removable cover seat 47, thereby making the pot opening sealing ring 43, the first sealing ring 42, and the cover plate 41 detachably connected to the removable cover seat 47.

[0231] For example, a fastener hole 47D is provided on the upper surface of the seat body 47A, which can be detachably connected to a fastener. Corresponding to the position of the fastener hole 47D, the pressure ring 44, the first mounting portion 42B, and the cover plate mounting portion 41B are respectively provided with a pressure ring mounting hole 44C, a first mounting hole 42C, and a cover plate mounting hole 41D for the fastener to pass through. Thus, the fastener can pass sequentially through the pressure ring 44, the first mounting portion 42B, and the cover plate mounting portion 41B before being detachably connected to the fastener hole 47D.

[0232] Furthermore, the fastener can be constructed as a screw, for example, and the fastener hole 47D has a thread that matches the screw. Multiple fastener holes 47D can be evenly arranged along the circumferential direction DC of the seat body 47A, thereby better connecting the pressure ring 44 and the removable cover 47 through multiple corresponding fasteners. The lower surface of the pressure ring 44 can be constructed with a downwardly protruding protrusion 44B, and the pressure ring mounting hole 44C extends from the upper surface of the pressure ring 44 through the protrusion 44B. The inner diameter of the first mounting hole 42C and the cover plate 41 mounting hole 41D is not less than the outer diameter of the protrusion 44B, so that the protrusion 44B can pass through. The seat body 47A has a mounting groove 47E above the fastener hole 47D for receiving the protrusion 44B. The protrusion 44B can pass through the first mounting hole 42C and the cover plate mounting hole 41D into the mounting groove 47E, and the fastener directly passes through the protrusion 44B, thereby detachably connecting with the fastener hole 47D. When assembling the removable cover 40, the protrusion 44B serves as a pre-positioning part, allowing the first sealing ring 42, cover plate 41, and removable cover seat 47 to be pre-connected before fastening, facilitating the installation of fasteners.

[0233] The pot opening sealing ring 43 also includes a second limiting portion 43D, which protrudes from the lower surface of the first limiting portion 43C. A limiting groove 47C is provided on the upper surface of the seat body 47A that abuts against the first limiting portion 43C. The limiting groove 47C is constructed as a recess that matches the second limiting portion 43D, for accommodating the second limiting portion 43D. The second limiting portion 43D abuts against the limiting groove 47C, thereby limiting the pot opening sealing ring 43 relative to the removable cover seat 47 in the radial direction DR.

[0234] like Figure 8 As shown, the pot opening sealing ring 43 also includes a first support portion 43E, which protrudes from the upper surface of the first limiting portion 43C and abuts against the lower surface of the cover plate mounting portion 41B. The first support portion 43E uses a small amount of material to achieve a sealing contact between the pot opening sealing ring 43 and the cover plate 41, so that foam, gas, etc. generated in the cooking cavity 61 will not contaminate the removable cover seat 47, for example, it will not corrode the fasteners, thereby extending the service life of the removable cover 40.

[0235] The pot opening sealing ring 43 may further be provided with a second support portion 43F, which is constructed as a rib extending inward in the radial direction DR on the inner circumferential surface of the pot opening sealing ring 43. The cover plate sidewall 41A also includes a radially extending step portion 41C, the radial dimension of the cover plate sidewall 41A above the step portion 41C being larger than the radial dimension of the cover plate sidewall 41A below the step portion 41C. The upper surface of the second support portion 43F abuts against the lower surface of the step portion 41C, thereby providing support for the cover plate 41 and making the connection between the various components of the removable cover 40 more stable.

[0236] like Figures 4 to 6 As shown, the bottom wall 41H of the cover plate, which is also the bottom wall 20 of the overflow prevention cavity 15, is provided with a plurality of bottom wall through holes 25. The shape of the bottom wall through holes 25 can be circular, elliptical, or polygonal. The bottom wall through holes 25 include at least one first bottom wall through hole 25A and at least one second bottom wall through hole 25B. The size of the first bottom wall through hole 25A is smaller than the size of the second bottom wall through hole 25B. The bottom wall through holes 25 can include a plurality of first bottom wall through holes 25A. The bottom wall through holes 25 can include a plurality of second bottom wall through holes 25B.

[0237] When the food in the cooking chamber 61 boils, the resulting foam and steam enter the anti-overflow chamber 15 through the bottom wall through-hole 25. Because foam is viscous and relatively large, the resistance to its passage through the first bottom wall through-hole 25A is greater than the resistance to its passage through the second bottom wall through-hole 25B. Therefore, foam tends to enter the anti-overflow chamber 15 through the second bottom wall through-hole 25B. Steam, however, is not significantly obstructed at the first bottom wall through-hole 25A and can enter the anti-overflow chamber 15 through it. Thus, the different sized bottom wall through-holes 25 achieve vapor-liquid separation, meaning foam and steam tend to enter the anti-overflow chamber 15 through different channels. In the anti-overflow chamber 15, steam can use its temperature and pressure to break up the foam, reducing foam accumulation and further improving the anti-overflow effect. After the foam breaks, the liquid can also return to the cooking chamber 41 through the bottom wall through-hole 25.

[0238] The centralized arrangement of multiple first bottom wall through holes 25A helps to ensure the temperature and pressure of water vapor in the overflow prevention cavity 15. The distance of the second bottom wall through hole 25B from the first bottom wall through hole 25A facilitates the centralized arrangement of multiple first bottom wall through holes 25A. Therefore, as... Figure 9 As shown, the bottom wall 41H of the cover plate includes two different regions: the second part 22 and the fourth part 24. The first bottom wall through hole 25A is provided in the second part 22, and the second bottom wall through hole 25B is provided in the fourth part 24, thereby realizing the centralized arrangement of multiple first bottom wall through holes 25A.

[0239] like Figures 10 to 14 As shown, preferably, the second part 22 of the bottom wall can be higher than the fourth part 24 of the bottom wall, so that the first bottom wall through hole 25A is higher than the second bottom wall through hole 25B. This prevents boiling foam from blocking the first bottom wall through hole 25A, reducing the resistance of steam passing through it and thus achieving better gas-liquid separation. Specifically, the height difference between the lowest point of the first bottom wall through hole 25A and the highest point of the second bottom wall through hole 25B can be greater than or equal to 3 mm. The second bottom wall through hole 25B can be located at the lowest position of the bottom wall 41H of the cover plate. For example, as... Figure 10 As shown, the bottom wall 41H of the cover plate can be constructed as a tapered structure that is wider at the bottom and narrower at the top. The second part 22 and the fourth part 24 of the bottom wall are arranged in the radial direction, and the fourth part 24 of the bottom wall is located on the outer periphery of the second part 22 of the bottom wall.

[0240] Combination Figure 2 , Figure 3 and Figure 10It can be seen that, preferably, the first bottom wall through-hole 25A is closer to the venting component 30 than the second bottom wall through-hole 25B, or in other words, the second part 22 of the bottom wall is closer to the venting component 30 than the fourth part 24 of the bottom wall. The venting component 30 is the channel connecting the overflow prevention cavity 15 to the outside, and the contents of the overflow prevention cavity 15 will all move towards the venting component 30. When the first bottom wall through-hole 25A is closer to the venting component 30, water vapor will preferentially occupy the surrounding space of the venting component 30, so that the foam must encounter water vapor to achieve the foam breaking effect. Otherwise, the foam may be discharged from the venting component 30 before it is broken by water vapor, causing overflow.

[0241] exist Figures 2 to 10 In the described embodiment, the steam exhaust component 30 is not located on the central axis of the cooking cavity 61. In the vertical projection of the cover 10, the geometric center point M of the second part 22 of the bottom wall does not coincide with the geometric center point N of the bottom wall 41H of the cover plate (see...). Figure 9 The bottom wall 41H of the cover plate is constructed as an oblique cone to facilitate the second part 22 of the bottom wall being closer to the exhaust component 30. Of course, in order to make the first bottom wall through hole 25A closer to the exhaust component 30, the second part 22 and the fourth part 24 of the bottom wall can also be arranged in the left-right direction as shown in the figure, with the second part 22 on the right and the fourth part 24 on the left.

[0242] Of course, the geometric center point M of the second part 22 of the bottom wall can also coincide with the geometric center point N of the bottom wall 41H of the cover plate, so that the bottom wall 41H of the cover plate is constructed as a right cone, thereby reducing the processing difficulty of the cover plate 41.

[0243] The foam in the overflow prevention cavity 15 cools down as it moves, which is beneficial for breaking the bubbles. In order to ensure that the bubbles entering from the second bottom wall through hole 25B have sufficient travel distance, the distance between the edge of the first bottom wall through hole 25A and the edge of the second bottom wall through hole 25B is not less than 10mm, that is, the minimum distance between a point on the edge of the first bottom wall through hole 25A and a point on the edge of the second bottom wall through hole 25B is not less than 10mm.

[0244] When the bottom wall 41H of the cover plate is constructed as a conical structure that is wider at the bottom and narrower at the top (convex upwards), according to Bernoulli's principle, the pressure at the fourth part 24 of the bottom wall is greater than the pressure at the second part 22 of the bottom wall, which can further promote the discharge of gas (water vapor) along the conical side from the first bottom wall through hole 25A. The line connecting the first bottom wall through hole 25A and the second bottom wall through hole 25B has a first angle with the horizontal plane. In order to facilitate the backflow of liquid from the second bottom wall through hole 25B, the first angle is greater than or equal to 5°.

[0245] To better block foam in the cooking cavity 61 through the first bottom wall through hole 25A, and to increase the steam flow velocity at the first bottom wall through hole 25A (to facilitate breaking up air bubbles in the anti-overflow cavity 15), the area of ​​each first bottom wall through hole 25A is in the range of [1.77 mm]. 2 20mm 2 For example, it can be 1.77mm. 2 3mm 2 Or 20mm 2 For example, when the first bottom wall through-hole 25A is circular, its diameter can be 1.5-2.5 mm. To make the second bottom wall through-hole 25B more suitable for foam passage, the area of ​​each second bottom wall through-hole 25B ranges from [20 mm²]. 2 300mm 2 For example, it can be 20mm. 2 150mm 2 Or 300mm 2 For example, when the second bottom wall through hole 25B is circular, its diameter can be 6-10 mm.

[0246] To accommodate the overflow prevention chamber 15, the number or total area of ​​the first bottom wall through-hole 25A and the second bottom wall through-hole 25B has a preferred range. Furthermore, this matching of the number or total area balances the amount of gas and foam received by the overflow prevention chamber 15, achieving a better overflow prevention effect. Specifically, the total area of ​​the first bottom wall through-hole 25A is within the range of [60mm]. 2 200mm 2 For example, it can be 60mm. 2 100mm 2 Or 200mm 2 The total area of ​​the second bottom wall through hole 25B ranges from [100mm²]. 2 1000mm 2 For example, it can be 100mm. 2 300mm 2 Or 1000mm 2 The ratio of the total area of ​​the second bottom wall through-hole 25B to the total area of ​​the first bottom wall through-hole 25A is the second ratio, which ranges from [2, 5], for example, it can be 2, 3, or 5. The number of first bottom wall through-holes 25A is 10 to 64, for example, it can be 10, 40, or 64. The number of second bottom wall through-holes 25B is 5 to 30, for example, it can be 5, 10, or 30.

[0247] like Figures 9 to 14As shown, the fourth part 24 of the bottom wall can be constructed as an annular region centered on the geometric center point N of the bottom wall 41H of the cover plate. For example, the fourth part 24 of the bottom wall can be constructed as an annular region extending along a plane at the lowest position of the bottom wall 41H of the cover plate. The outer periphery of the fourth part 24 of the bottom wall is the outer periphery of the bottom wall 41H of the cover plate, so that the second bottom wall through hole 25B can be provided at the lowest position of the bottom wall 41H of the cover plate. Figures 4 to 6 and Figure 9 As shown, multiple second bottom wall through holes 25B can be evenly arranged along the circumferential direction DC on the bottom wall 41H of the cover plate.

[0248] like Figure 10 As shown, in the cross-section of the cover 10 passing through the geometric center point M of the second part 22 of the bottom wall and extending in the vertical direction, the second part 22 of the bottom wall extends along an inclined straight line, and the inclined straight line intersects with the inner edge of the fourth part 24 of the bottom wall. The first bottom wall through hole 25A can be set near the top of the conical structure, thereby ensuring the maximum height difference and the maximum distance between the first bottom wall through hole 25A and the second bottom wall through hole 25B.

[0249] like Figures 10 to 14 As shown, the bottom wall 41H of the cover plate also includes a third bottom wall portion 23 located between the second bottom wall portion 22 and the fourth bottom wall portion 24. For example, the third bottom wall portion 23 is constructed as an annular region located in the radial direction DR between the first bottom wall through hole 25A and the second bottom wall through hole 25B. The second bottom wall portion 22 and the fourth bottom wall portion 24 are located on both sides of the third bottom wall portion 23. In a cross section of the cover 10 passing through the geometric center point M of the second bottom wall portion 22 and extending in the vertical direction, the third bottom wall portion 23 may include two sub-third bottom wall portions 23A located on both sides of the geometric center point M of the second bottom wall portion 22. Each sub-third bottom wall portion 23A has an arbitrary first position point P and a second position point Q, wherein when the first position point P is closer to the second bottom wall portion 22 than the second position point Q, the first position point P is not lower than the second position point Q. Thus, the third part 23 of the bottom wall gradually rises from the outside to the inside, facilitating the return of liquid through the third part 23 to the position of the second bottom wall through hole 25B. For example... Figures 11 to 14 As shown, when the geometric center point of the second part 22 of the bottom wall coincides with the geometric center point of the bottom wall 41H of the cover plate, the two third parts 23A of the sub-bottom walls can be symmetrical about the central axis of the bottom wall 41H of the cover plate, for example, the bottom wall 41H of the cover plate has a radially symmetrical structure.

[0250] In practical use, due to the tapered structure of the bottom wall 41H of the cover plate, which is wider at the bottom and narrower at the top, a large pressure difference can be formed between the first bottom wall through hole 25A located at the top and the second bottom wall through hole 25B located at the bottom. When bubbles (foam) are first generated inside the cooking cavity 61, since there is a distance between the bubbles and both the first and second bottom wall through holes 25A and 25B, the first and second bottom wall through holes 25A and 25B are mainly used to discharge steam. However, as the number of bubbles in the cooking cavity 61 increases, due to the pressure and height difference between the first and second bottom wall through holes 25A and 25B, as well as the relationship between the individual and total areas of the first and second bottom wall through holes 25A and 25B, gas is promoted to be discharged from the first bottom wall through hole 25A along the tapered slope. At the same time, the bubbles preferentially enter the overflow prevention cavity 15 through the second bottom wall through hole 25B, thus achieving gas-liquid separation.

[0251] Furthermore, as the bubbles continue to increase and accumulate in the overflow cavity 15, the bubbles will climb up the slope of the third part 23 of the bottom wall to the position of the first bottom wall through hole 25A. Since the diameter of the first bottom wall through hole 25A is small and gas is continuously discharged, the gas discharged at the first bottom wall through hole 25A has a large velocity, which can break the bubbles that have accumulated near the first bottom wall through hole 25A. The broken bubbles turn into liquid and flow down the slope, and flow back to the cooking cavity 61 from the second bottom wall through hole 25B, realizing the internal steam bubble breaking and return.

[0252] In the axial section of the cover 10, which passes through the geometric center point M of the second part 22 of the bottom wall and extends in the vertical direction, as follows: Figure 10 As shown, the third part 23A of the sub-bottom wall can be a straight line. Or, as... Figure 11 and Figure 12 As shown, the third part 23A of the sub-bottom wall can be a curve. Or, as... Figure 13 As shown, the third part 23A of the sub-bottom wall can be a broken line composed of straight lines. Or, as... Figure 14 As shown, the third part 23A of the sub-bottom wall can be formed by a combination of straight lines and curves. It is understood that the shape of the third part 23A of the sub-bottom wall is not limited to the example described above in the axial section of the cover 10 that passes through the geometric center point M of the second part 22 of the bottom wall and extends in the vertical direction.

[0253] like Figure 15 and 16 As shown, the third part 23 of the bottom wall may be provided with at least one guide groove 45. The guide groove 45 is, for example, constructed as a strip-shaped groove extending radially in the direction DR on the upper surface of the third part 23 of the bottom wall, such as... Figure 15 As shown, when the geometric center point M of the second part 22 of the bottom wall coincides with the geometric center point N of the bottom wall 41H of the cover plate, multiple guide channels 45 can be equally spaced along the circumferential direction DC, or, as... Figure 16As shown, when the geometric center point M of the second part 22 of the bottom wall does not coincide with the geometric center point N of the bottom wall 41H of the cover plate, multiple guide channels 45 of different lengths can be provided around the geometric center point M of the second part 22 of the bottom wall. The guide channels 45 can extend from a position near the first bottom wall through hole 25A to a position near the second bottom wall through hole 25B, thereby facilitating the return of liquid to the second bottom wall through hole 25B.

[0254] The third part 23 of the bottom wall is also provided with a sensor through hole 26 for the top temperature sensor 16 to pass through, so that the top temperature sensor 16 can detect the temperature inside the cooking cavity 61. Of course, the sensor through hole 26 can also be used for other sensors of the cover 10 to pass through, such as pressure sensors, humidity sensors, etc. The third part 23 of the bottom wall can be provided with multiple sensor through holes 26, each for different sensors to pass through.

[0255] like Figures 9 to 16 As shown, the second part 22 of the bottom wall is constructed as an annular region. The bottom wall 20 also includes a first part 21 of the bottom wall, which is disposed radially DR inside the second part 22. The edge of the first part 21 of the bottom wall can be defined by the edge of the first bottom wall through hole 25A. The first part 21 of the bottom wall and the third part 23 of the bottom wall are located on both sides of the second part 22. The first part 21 of the bottom wall and the fourth part 24 of the bottom wall are located on both sides of the second part 22. The first part 21 of the bottom wall and the fourth part 24 of the bottom wall are located on both sides of the third part 23 of the bottom wall. The first part 21 of the bottom wall can be constructed as a non-perforated region. The venting component 30 is disposed above the first part 21 of the bottom wall. Thus, the venting component 30 is connected to the top of the overflow prevention cavity 15. The first part 21 of the bottom wall includes a platform region 21A constructed as a flat plate (see Figure 10 The exhaust component 30 can be positioned directly above the platform area 21A, so that the second part 22 of the bottom wall is closer to the exhaust component 30 than the fourth part 24 of the bottom wall. The first bottom wall through hole 25A can be positioned near the edge of the platform area 21A, so that steam can pass through the first bottom wall through hole 25A and be discharged to the outside through the exhaust component 30.

[0256] Specifically, the minimum distance between a point on the edge of a first bottom wall through-hole 25A and a point on the edge of the platform region 21A is used as the distance between the edge of the first bottom wall through-hole 25A and the edge of the platform region 21A. The value range of the distance between the edge of the first bottom wall through-hole 25A and the edge of the platform region 21A is [1mm, 10mm], for example, it can be 1mm, 3mm or 10mm. If the first bottom wall through-hole 25A is too close to the platform region 21A, the bubble bursting point will be too close to the venting component 30, causing the foam to overflow from the venting component 30. If the first bottom wall through-hole 25A is too far from the platform region 21A, the foam will move too little distance in the overflow prevention cavity 15, affecting the overflow prevention effect.

[0257] like Figure 17 and Figure 18 As shown, the exhaust component 30 includes an exhaust chamber 30A extending in the vertical direction, and the exhaust chamber 30A is configured to communicate with the outside. For example, as Figure 2 and Figure 3 As shown, the exhaust component 30 is detachably mounted on the cover 11. The cover 11 includes an exhaust cavity 18. The cover body 10 also includes a faceplate sealing ring 14, which is disposed at the end of the side wall of the exhaust cavity 18 and is used to seal the connection between the side wall of the exhaust cavity 18 and the cover 13. A horizontal annular support rib 19 is provided inside the exhaust cavity 18. The side wall 31 of the exhaust cavity 30A is constructed with an annular outer flange 39. One of the support rib 19 and the outer flange 39 has a certain elasticity, so that the outer flange 39 can squeeze through the hole of the support rib 19 and overlap the upper part of the support rib 19. The cover 13 has an exhaust hole corresponding to the position of the exhaust cavity 18, so that the exhaust cavity 18 communicates with the outside. The side wall 31 of the exhaust cavity 30A is provided with a plurality of exhaust through holes 33. Multiple exhaust holes 33 can be staggered axially (vertically) and circumferentially along the exhaust cavity 30A. For example, the exhaust holes 33 include a first exhaust hole 33A located below the outer flange 39 and a second exhaust hole 33B located above the outer flange 39. Since the support rib 19 divides the liner exhaust cavity 18 into two, the overflow prevention cavity 15 cannot directly communicate with the second exhaust hole 33B. Thus, the overflow prevention cavity 15 is configured to communicate with the exhaust cavity 30A through the first exhaust hole 33A, and further communicate with the outside through the second exhaust hole 33B and the liner exhaust cavity 18.

[0258] The exhaust chamber 30A is positioned above the first part 21 of the bottom wall, so that the second part 22 of the bottom wall is closer to the exhaust port 33 than the fourth part 24 of the bottom wall, and the first bottom wall through-hole 25A is closer to the exhaust port 33 than the second bottom wall through-hole 25B. Therefore, steam preferentially occupies the exhaust chamber 30A and its surrounding space, preventing foam from directly entering the exhaust chamber 30A. In the vertical projection of the cover 10, at least a portion of the first bottom wall through-hole 25A is located between the second bottom wall through-hole 25B and the exhaust port 33. In the vertical projection of the cover 10, all of the first bottom wall through-holes 25A are located between the second bottom wall through-hole 25B and the exhaust port 33. Thus, in the overflow prevention chamber 15, steam is located on the necessary path for foam movement. When the foam is effectively broken, only steam can enter the exhaust chamber 30A through the exhaust port 33 and then be discharged to the external environment. In this application, foam should be avoided or prevented from entering the exhaust chamber 30A as much as possible.

[0259] The venting chamber 30A is located above the first part 21 of the bottom wall. At least one of the bottom wall 32 and the first part 21 of the bottom wall of the venting chamber 30A is not provided with openings to prevent bubbles from directly entering the venting chamber 30A from the overflow prevention chamber 15 and causing overflow. In the vertical projection of the cover 10, the first part 21 of the bottom wall includes the entire bottom wall 32 of the venting chamber 30A. In the vertical projection of the cover 10, the platform region 21A of the first part 21 of the bottom wall includes the entire bottom wall 32 of the venting chamber 30A. The ratio of the width of the platform region 21A to the width of the bottom wall 20 of the overflow prevention chamber 15 (i.e., the bottom wall 41H of the cover plate) is a third ratio, and the value of the third ratio ranges from [1 / 20, 1 / 5]. If the third ratio is too small, the bubble bursting point will be too close to the venting component 30, causing the foam to overflow from the venting component 30. If the third ratio is too high, the foam will move too little distance in the overflow prevention cavity 15, affecting the overflow prevention effect.

[0260] like Figure 19 and Figure 20 As shown, when a return hole 34 is provided on the bottom wall 32 of the exhaust chamber 30A, no through hole is provided on the first part 21 of the bottom wall. The return hole 34 is used to allow liquid (e.g., distilled water formed by steam condensation) in the exhaust chamber 30A to flow back into the anti-overflow chamber 15. The outer diameter of the bottom wall 32 of the exhaust chamber 30A is not greater than the width of the outer edge of the first part 21 of the bottom wall. The outer diameter of the bottom wall 32 of the exhaust chamber 30A is not greater than the width of the outer edge of the platform region 21A. If the outer diameter of the bottom wall 32 of the exhaust chamber 30A is too large, air bubbles at the first bottom wall through hole 25A will overflow into the exhaust chamber 30A through the return hole 34. Furthermore, the height difference between the lower surface of the bottom wall 32 of the exhaust chamber 30A and the platform area 21A is no more than 3mm, so as to prevent air bubbles at the first bottom wall through hole 25A from being squeezed into the gap between the bottom wall 32 of the exhaust chamber 30A and the platform area 21A, and directly overflowing from the return hole 34 at the bottom of the anti-overflow valve into the exhaust chamber 30A.

[0261] The lower edge of the exhaust port 33, specifically the lower edge of the first exhaust port 33A, has a height difference of at least 5mm with the bottom of the exhaust component 30, i.e. the lower surface of the bottom wall 32 of the exhaust chamber 30A, so as to prevent the accumulation of air bubbles that have not yet broken at the first bottom wall through hole 25A from overflowing from the first exhaust port 33A.

[0262] Of course, the bottom wall 32 of the exhaust chamber 30A may not have an opening. In this case, the first part 21 of the bottom wall may be provided with a bottom wall through hole 25, for example, a first bottom wall through hole 25A, so that the first part 21 of the bottom wall merges into the second part 22 of the bottom wall. Therefore, in this application, at least one of the bottom wall 32 and the first part 21 of the bottom wall of the exhaust chamber 30A is not provided with an opening. Alternatively, the opening of the bottom wall 32 of the exhaust chamber 30A and the bottom wall through hole are offset along the radial direction DR of the cover 10.

[0263] In order to ensure that steam can pass smoothly through the steam exhaust component 30 and be discharged from the cover 10, the total area of ​​the steam exhaust hole 33, that is, the total area of ​​the first steam exhaust hole 33A and the second steam exhaust hole 33B, shall not be less than the total area of ​​the first bottom wall through hole 25A.

[0264] Or, such as Figures 21 to 23 As shown, the steam vent 33 may consist only of the first steam vent 33A. The first steam vent 33A is located on the side wall 31 of the steam venting chamber 30A, facilitating steam entry into the steam venting chamber 30A from the anti-overflow chamber 15. The height difference between the lower edge of the first steam vent 33A and the bottom of the steam venting component 30, i.e., the lower surface of the bottom wall 32 of the steam venting chamber 30A, is at least 5mm, thereby preventing air bubbles that have not yet broken at the first bottom wall through-hole 25A from overflowing from the first steam vent 33A. To ensure that steam can smoothly pass through the steam venting component 30 and exit the cover 10, the total area of ​​the first steam vent 33A is not less than the total area of ​​the first bottom wall through-hole 25A.

[0265] The exhaust port 33 is located on the side wall 31 of the exhaust chamber 30A, which provides some obstruction to the foam and prevents bubbles from escaping. Gas can then be discharged through the exhaust port 33. If there are too many bubbles, a first exhaust port 33A and a second exhaust port 33B, staggered in both the circumferential direction DC and vertical direction along the exhaust chamber 30A, can be simultaneously provided. This change in the exhaust channel further breaks up some of the bubbles. Finally, the condensate in the exhaust chamber 30A can be discharged through the return hole 34 located on the bottom wall 32 of the exhaust chamber 30A.

[0266] Or, such as Figure 24 As shown, in the second embodiment, the venting component 130 of the cover 110 can be integrally formed with the liner 11, simplifying the design and thus reducing costs. For parts not described in the second embodiment, please refer to the description in the first embodiment.

[0267] In such Figure 25 and Figure 26In the third embodiment shown, the removable cover 240 of the lid 210 of the cooking appliance 200 differs from the removable cover 40 of the first embodiment. Specifically, the bottom wall 241H of the cover, i.e., the bottom wall 220 of the overflow cavity 15, is constructed as a flat plate. In this case, the bottom wall 220 may also include a second part 22 of the bottom wall with a first bottom wall through hole 25A and a fourth part 24 of the bottom wall with a second bottom wall through hole 25B. The second part 22 of the bottom wall is located closer to the steam venting component 30 than the fourth part 24 of the bottom wall. Compared with the first embodiment, the third embodiment makes the first bottom wall through hole 25A and the second bottom wall through hole 25B have the same height, while other technical features (such as the area and number of the first bottom wall through hole 25A, the area and number of the second bottom wall through hole 25B, the distance between the first bottom wall through hole 25A and the second bottom wall through hole 25B, the connection relationship between the steam venting component 30 and the overflow cavity 15, the partitioning method of the bottom wall 220, etc.) remain unchanged. This can also be understood as meaning that all features applicable to the third embodiment in the first embodiment can be applied to the third embodiment. For parts not described in the third embodiment, please refer to the description in the first embodiment.

[0268] exist Figures 27 to 34 In the fourth embodiment shown, the lid 310 of the cooking appliance is provided with an overflow cavity 15. Unlike the previous three embodiments, the removable lid 340 provides the top wall, side wall and bottom wall 320 of the overflow cavity 15.

[0269] As shown in the figure, in the fourth embodiment of this application, the removable cover 340 includes an upper cover plate 46 and a lower cover plate 341. The upper cover plate 46 is detachably connected to the liner 11. The upper cover plate 46 forms the top wall of the overflow-proof cavity 15. The lower cover plate 341 is connected to the lower surface of the upper cover plate 46 and is used to cover the cooking cavity opening 63. The lower cover plate 341 provides the side walls and bottom wall 320 of the overflow-proof cavity 15.

[0270] The upper cover plate 46 is provided with an upper cover plate vent hole 46C for discharging steam. A venting component 30 is connected to the upper cover plate vent hole 46C; for example, at least a portion of the venting chamber 30A is disposed in the upper cover plate vent hole 46C, or the upper cover plate vent hole 46C is configured to communicate with the liner venting chamber 18. The removable cover 340 also includes a liner sealing ring 46A, which is disposed at the opening of the upper cover plate vent hole 46C. The liner sealing ring 46A may be made of, for example, an elastic material, for sealing the bottom opening of the liner venting chamber 18.

[0271] The lower cover 341 includes a bottom wall 341H and a side wall 41A. The bottom wall 341H forms the bottom wall 320 of the overflow-proof cavity 15, and has a bottom wall through hole 25, thereby connecting the cooking cavity 61 and the overflow-proof cavity 15. The side wall 41A extends upward along the outer peripheral edge of the bottom wall 341H to contact the lower surface of the upper cover 46, and forms the side wall of the overflow-proof cavity 15.

[0272] The lower surface of the upper cover plate 46 is provided with a downwardly protruding upper cover plate connector 51. The upper cover plate 46 is provided with a connector seat 53, which, for example, penetrates through the upper cover plate 46. The upper end of the upper cover plate connector 51 is detachably connected to the lower end of the connector seat 53. The bottom wall 341H of the cover plate is provided with a lower cover plate connector 52. The upper cover plate connector 51 is detachably connected to the lower cover plate connector 52, thereby allowing the lower cover plate 341 to be detachably connected to the upper cover plate 46. An overflow prevention cavity 15 can be formed between the upper cover plate 46 and the lower cover plate 341 of the removable cover 340. The main structure of the cover body 310 is only slightly modified, which helps to reduce costs.

[0273] Specifically, such as Figures 28 to 31 As shown, the upper cover plate connector 51 includes a first connecting portion 51A and a second connecting portion 51B. The first connecting portion 51A is disposed on the lower surface of the upper cover plate 46. The second connecting portion 51B is disposed at the lower end of the first connecting portion 51A, and the outer diameter of the second connecting portion 51B is larger than the outer diameter of the first connecting portion 51A. The lower cover plate connector 52 is constructed as a receiving groove on the bottom wall 341H of the cover plate, using an elastic material as the groove wall, for accommodating the second connecting portion 51B. The inner diameter of the groove opening is smaller than the outer diameter of the second connecting portion 51B, thereby allowing the second connecting portion 51B to be confined within the receiving groove. The second connecting portion 51B includes a tapered portion with a downward-pointing tip, facilitating the insertion of the upper cover plate connector 51 into the receiving groove of the lower cover plate connector 52. The bottom wall 3341H of the cover plate is provided with a connecting hole 41E. The outer peripheral surface of the groove wall of the receiving groove of the lower cover plate connector 52 is provided with a connecting groove 52A extending in the circumferential direction, which is used to receive the bottom wall 341H of the cover plate located around the opening of the connecting hole 41E, so that the receiving groove is detachably connected to the bottom wall 341H of the cover plate.

[0274] The upper cover plate 46 and the lower cover plate 341 are respectively provided with sensor through holes 26A and 26B at corresponding positions, so that a sensor such as the top temperature sensor 16 can detect the parameters of the cooking space through the sensor through holes.

[0275] The removable cover 340 also includes a pot opening sealing ring 43 and a removable cover seat 47. The pot opening sealing ring 43 is disposed on the outer periphery of the lower cover plate 341. The pot opening sealing ring 43 is made of, for example, an elastic material and is used to seal the contact cooking cavity opening 63. The removable cover seat 47 is used to removably attach to the liner 11. Both the upper cover plate 46 and the pot opening sealing ring 43 are removably connected to the removable cover seat 47, thereby removably connecting to the liner 11.

[0276] like Figure 32 As shown, the removable cover 47 includes an annular body 47A, with at least a portion of the cover sidewall 41A and at least a portion of the pot opening sealing ring 43 surrounded by the inner circumferential surface of the body 47A. The pot opening sealing ring 43 includes a pot opening sealing portion 43A and an extension portion 43B. The pot opening sealing portion 43A is used to seal the contact cooking cavity opening 63. The extension portion 43B extends upward from the upper end of the pot opening sealing portion 43A, is annular in shape, and is surrounded by the inner circumferential surface of the body 47A. The extension portion 43B is located outside the cover sidewall 41A in the radial direction DR, that is, the radial direction DR extension portion 43B is located between the body 47A and the cover sidewall 41A.

[0277] The pot opening sealing ring 43 also includes a first limiting portion 43C, which extends outward from the upper end of the extension portion 43B in the radial direction DR. The lower surface of the first limiting portion 43C is connected to the upper surface of the seat body 47A. The upper surface of the pot opening sealing portion 43A can abut against the lower surface of the seat body 47A, further limiting the pot opening sealing ring 43 relative to the removable cover seat 47 in the axial direction DA.

[0278] The pot opening sealing ring 43 also includes a second limiting portion 43D, which protrudes from the lower surface of the first limiting portion 43C. A limiting groove 47C is provided on the upper surface of the seat body 47A that abuts against the first limiting portion 43C. The limiting groove 47C is constructed as a recess that matches the second limiting portion 43D, for accommodating the second limiting portion 43D. The second limiting portion 43D abuts against the limiting groove 47C, thereby limiting the pot opening sealing ring 43 relative to the removable cover seat 47 in the radial direction DR.

[0279] The lower surface of the outer peripheral region 46E of the upper cover plate 46 abuts against the upper surface of the seat body 47A, and a snap fastener 46B is provided on the outer edge of the outer peripheral region 46E of the upper cover plate 46, so that the upper cover plate 46 is detachably connected to the detachable cover seat 47 via the snap fastener 46B. For example, the snap fastener 46B can engage with the limiting groove 47C. The first limiting part 43C of the pot opening sealing ring 43 is located between the outer peripheral region 46E of the upper cover plate 46 and the seat body 47A in the vertical direction, so that the pot opening sealing ring 43 is clamped by the upper cover plate 46 and the detachable cover seat 47.

[0280] The pot rim sealing ring 43 also includes a first support portion 43E, which protrudes from the upper surface of the first limiting portion 43C and abuts against the lower surface of the outer peripheral region 46E of the upper cover plate 46. The upper surface of the first support portion 43E can, for example, be an arc surface. The first support portion 43E uses a small amount of material to ensure a sealed contact between the pot rim sealing ring 43 and the upper cover plate 46, thereby limiting the range of foam and gas generated during cooking. For example, it prevents foam and gas from affecting the removable cover 47, thus helping to ensure the service life of the removable cover 47.

[0281] The removable cover 340 also includes a cover sealing ring 48, which is disposed at the upper end of the cover sidewall 41A. The cover sealing ring 48 may be made of, for example, an elastic material, and is used to seal against the lower surface of the upper cover 46. The upper end of the cover sidewall 41A is provided with a flange 41J that protrudes outward in the radial direction DR. The cover sealing ring 48 is fitted onto the flange 41J in the radial direction DR. The upper surface of the cover sealing ring 48 is used to contact the lower surface of the upper cover 46, thereby forming a seal between the upper cover 46 and the lower cover 41, that is, the sidewall of the overflow cavity 15 will not leak.

[0282] The pot opening sealing ring 43 is also provided with a second support portion 43F, which is constructed as a rib protruding inward in the radial direction DR on the inner circumferential surface of the pot opening sealing ring 43. The upper surface of the second support portion 43F abuts against the lower surface of the cover plate sealing ring 48, so that the second support portion 43F can support the flange 41J of the lower cover plate 341, so that the lower cover plate 341 is supported at the middle lower cover plate connector 52 and the outer periphery, and the connection between the lower cover plate 341 and the upper cover plate 46 is more stable.

[0283] like Figure 33 and Figure 34 As shown, the upper cover plate 46 is provided with a reinforcing groove 46D, which can be constructed, for example, as a groove extending in the circumferential direction DC, thereby further strengthening the structural strength of the upper cover plate 46.

[0284] In the fourth embodiment of this application, the structure of the bottom wall 341H of the cover plate differs somewhat from that of the bottom wall 41H of the cover plate in the first embodiment. For example, the lower cover plate 341 is provided with a connecting hole 41E for detachable connection with the lower cover plate connector 52. Furthermore, the lower cover plate 341 is not directly mounted on the detachable cover base 47.

[0285] In the fourth embodiment, the bottom wall 320 may also include a second part 22 of the bottom wall with a first bottom wall through hole 25A and a fourth part 24 of the bottom wall with a second bottom wall through hole 25B. The second part 22 of the bottom wall is located closer to the exhaust component 30 than the fourth part 24 of the bottom wall. The area and number of the first bottom wall through holes 25A, the area and number of the second bottom wall through holes 25B, the distance between the first bottom wall through holes 25A and the second bottom wall through holes 25B, the partitioning method of the bottom wall 320, the shape of the bottom wall 320, and the connection relationship between the exhaust component 30 and the overflow prevention cavity 15 can all be the same as in the first embodiment. It can also be understood that the features applicable to the fourth embodiment in the first embodiment can all be applied to the fourth embodiment.

[0286] For any parts not described in the fourth embodiment, please refer to the description in the first embodiment.

[0287] The processes and steps described in all the preferred embodiments above are merely examples. Unless adverse effects occur, various processing operations can be performed in a different order than those described above. The order of steps in the above process can also be added, combined, or deleted according to actual needs.

[0288] In understanding the scope of this application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of a described feature, element, component, group, whole, and / or step, but do not exclude the presence of other undescribed features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0289] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0290] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0291] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A cover for a cooking appliance, the cooking appliance comprising a pot body, the pot body comprising a cooking cavity for holding foodstuff, the cooking cavity having a cooking cavity opening for taking out and putting in foodstuff, characterized in that, The cover body is used to cover the pot body, and the cover body comprises: An anti-overflow cavity, a bottom wall of the anti-overflow cavity is used to cover the cooking cavity opening when the cover body covers the pot body, the bottom wall comprises a bottom wall second part and a bottom wall fourth part, the bottom wall second part is higher than the bottom wall fourth part, the bottom wall is provided with a plurality of bottom wall through holes for communication between the anti-overflow cavity and the cooking cavity, the bottom wall through holes comprise at least one first bottom wall through hole and at least one second bottom wall through hole, wherein the first bottom wall through hole is arranged on the bottom wall second part, the second bottom wall through hole is arranged on the bottom wall fourth part, and the first bottom wall through hole is smaller than the second bottom wall through hole; and A steam exhaust through hole is configured to communicate with the anti-overflow cavity and the outside, Wherein, the bottom wall second part is closer to the steam exhaust through hole than the bottom wall fourth part.

2. The cover of claim 1, wherein The distance between the edge of the first bottom wall through hole and the edge of the second bottom wall through hole is not less than 10 mm.

3. The cover of claim 1, wherein The first included angle between the line connecting the first bottom wall through hole and the second bottom wall through hole and the horizontal plane is greater than or equal to 5°.

4. The cover of claim 1, wherein The height difference between the lowest point of the first bottom wall through hole and the highest point of the second bottom wall through hole is greater than or equal to 3 mm.

5. The cover body according to claim 1, wherein An area of each of the first bottom wall through holes ranges from 1.77mm 2 to 20mm 2 ; and / or The area of each of the second bottom wall through holes ranges from 20mm 2 to 300mm 2 .

6. The cover body according to claim 5, wherein The total area of the first bottom wall through hole is in the range of [50mm 2 ,200mm 2 ]; and / or The total area of the second bottom wall through hole ranges from [100mm 2 ,1000mm 2 ].

7. The cover body according to claim 5, wherein The number of the first bottom wall through holes is 10-64, and / or The number of the second bottom wall through holes is 5-30.

8. The cover of claim 5, wherein The ratio of the total area of the second bottom wall through holes to the total area of the first bottom wall through holes is a second ratio, and the value of the second ratio is in the range of [2, 5].

9. The cover of claim 1, wherein The bottom wall second part and the bottom wall fourth part are arranged along the radial direction of the bottom wall, and the bottom wall fourth part surrounds the outer periphery of the bottom wall second part.

10. The cover body according to claim 9, wherein The second bottom wall through hole is arranged at the lowest position of the bottom wall, and / or The bottom wall through holes comprise a plurality of second bottom wall through holes, and the plurality of second bottom wall through holes are uniformly arranged along the circumferential direction on the bottom wall.

11. The cover body according to claim 9, wherein The bottom wall further comprises a bottom wall third part, and the bottom wall third part is an annular area between the first bottom wall through hole and the second bottom wall through hole along the radial direction.

12. The cover of claim 11, wherein, In a cross section of the cover body extending through the geometric center point of the bottom wall second part and in the up-down direction, the bottom wall third part comprises two sub-bottom wall third parts respectively located on both sides of the geometric center point of the bottom wall second part, wherein any one of the sub-bottom wall third parts has an arbitrary first position point and a second position point, and when the first position point is closer to the bottom wall second part than the second position point, the first position point is not lower than the second position point.

13. The cover of claim 12, wherein, In an axial section of the cover body passing through a geometric center point of the second part of the bottom wall and extending in the up-down direction, the third part of the sub-bottom wall is one of a straight line, a curve, and a broken line, or the third part of the sub-bottom wall is a combination of a straight line and a curve.

14. The cover body of claim 11, wherein the second part of the bottom wall is configured as an annular region. The third part of the bottom wall is provided with at least one slot extending in the radial direction; and / or The third part of the bottom wall is provided with a sensor through hole for passing a sensor.

15. The cover body of claim 9, wherein the second part of the bottom wall is configured as an annular region, The first part of the bottom wall is configured as a non-hole region.

16. The cover body of claim 15, wherein the cover body further comprises a steam exhaust component configured to communicate with the outside, the steam exhaust component being disposed above the first part of the bottom wall, The steam exhaust component is provided with the steam exhaust through hole communicating with the anti-overflow cavity, so that the anti-overflow cavity is configured to communicate with the outside through the steam exhaust component. The steam exhaust component comprises a steam exhaust cavity extending in the up-down direction, the steam exhaust cavity communicating with the outside, and the steam exhaust through hole being disposed on a side wall of the steam exhaust cavity.

18. The cover body of claim 17, wherein a total area of the steam exhaust through hole is not less than a total area of the first bottom wall through hole; and / or A height difference between a lower edge of the steam exhaust through hole and a bottommost part of the steam exhaust component is at least 5 mm.

17. The cover of claim 16, wherein The steam exhaust through hole comprises a first steam exhaust through hole and a second steam exhaust through hole, the first steam exhaust through hole and the second steam exhaust through hole being disposed on the side wall of the steam exhaust cavity and being staggered in both the circumferential direction of the steam exhaust cavity and the up-down direction. The first part of the bottom wall comprises a platform region, and the steam exhaust component is disposed above the platform region.

21. The cover body of claim 20, wherein a distance between an edge of the first bottom wall through hole and an edge of the platform region is in a range of [1 mm, 10 mm]; and / or A ratio of a width of the platform region to a width of the bottom wall is a third ratio, and the third ratio is in a range of [1 / 20, 1 / 5].

19. The cover of claim 17, wherein A bottom wall of the steam exhaust cavity is provided with a backflow hole.

20. The cover of claim 17, wherein, 23. The cover body of claim 22, wherein an outer diameter of the bottom wall of the steam exhaust cavity is not greater than a width of the platform region; and / or A height difference between a lower surface of the bottom wall of the steam exhaust cavity and the platform region is not greater than 3 mm. In a projection of the cover body in the up-down direction, a geometric center point of the second part of the bottom wall coincides with or does not coincide with a geometric center point of the bottom wall. The fourth part of the bottom wall is an annular region with the geometric center point of the bottom wall as a center.

22. The cover of claim 20, wherein The fourth part of the bottom wall is configured to extend along a plane. In a section of the cover body passing through a geometric center point of the second part of the bottom wall and extending in the up-down direction, the second part of the bottom wall extends along an inclined straight line, and the inclined straight line intersects with an inner edge of the fourth part of the bottom wall. ​ ​ 24. The cover of claim 9, wherein, ​ 25. The cover of claim 9, wherein, ​ 26. The cover of claim 25, wherein, ​ 27. The cover of claim 26, wherein, ​ 28. The cover of claim 1, wherein The shape of the bottom wall through hole is circular, elliptical, or polygonal.

29. The cap of any one of claims 1 to 28, wherein, In a projection of the cooking utensil in the up-down direction, at least part of the first bottom wall through hole is located between the second bottom wall through hole and the steam exhaust through hole.

30. A cooking appliance characterized by, Comprising: A pot body including a cooking cavity for holding food materials, the cooking cavity having a cooking cavity opening for taking and placing food materials; And The lid according to any one of claims 1 to 29, for covering the pot body.

Images