Cover body and cooking utensil

Abstract

The utility model discloses a cover body and a cooking utensil. The cover body is used for the 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 and comprises an anti-overflow cavity and a steam exhaust component. 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. At least one bottom wall through hole is formed in the bottom wall of the anti-overflow cavity and used for enabling the anti-overflow cavity to be communicated with the cooking cavity. The steam exhaust component comprises a steam exhaust cavity extending in the vertical direction, the steam exhaust cavity is constructed to be communicated with the outside, the steam exhaust cavity is provided with a steam exhaust through hole communicated with the anti-overflow cavity, and therefore the anti-overflow cavity is constructed to be communicated with the outside through the steam exhaust component. The steam exhaust component is arranged above the bottom wall, in the projection of the cover body in the vertical direction, the bottom wall of the anti-overflow cavity is provided with a bottom wall first part comprising the bottom wall of all the steam exhaust cavities, and at least one of the bottom wall of each steam exhaust cavity and the bottom wall first part is not provided with an open hole.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, and in particular to a cover for a cooking utensil and a cooking utensil comprising the cover. Background Art

[0002] The common anti-overflow structures of the lids of existing cooking utensils are generally divided into two types. One is to prevent overflow by collecting condensation in the cavity channel, and the other is to store foam in the cavity channel to break the foam and achieve the anti-overflow effect.

[0003] The overflow prevention structure generally needs to be connected to the exhaust hole of the cover body, which may cause bubbles to enter the exhaust valve through the overflow prevention structure, and then further overflow from the exhaust valve. The overflow prevention effect is poor and the user experience is not good.

[0004] Therefore, there is a need for a cover for a cooking utensil and a cooking utensil to at least partially solve the above problems. Utility Model Content

[0005] The Summary of the Utility Model introduces a series of simplified concepts that will be further described in the Detailed Description of the Implementation Method. The Summary of the Utility Model of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially address the above-mentioned problems, the present application provides, in a first aspect, a cover for a cooking utensil. The cooking utensil includes a pot body, the pot body including a cooking cavity for holding food, the cooking cavity having a cooking cavity opening for taking food in and out, the cover body being used to cover the pot body, the cover body comprising:

[0007] an anti-overflow cavity, wherein the bottom wall of the anti-overflow cavity is used to cover the cooking cavity opening when the lid body covers the pot body, and the bottom wall is provided with at least one bottom wall through hole for connecting the anti-overflow cavity with the cooking cavity; and

[0008] The exhaust component includes an exhaust cavity extending in the up-down direction, the exhaust cavity is configured to communicate with the outside world, and the exhaust cavity is provided with an exhaust through hole communicating with the overflow prevention cavity, so that the overflow prevention cavity is configured to communicate with the outside world through the exhaust component.

[0009] The exhaust component is arranged above the bottom wall. In the projection of the cover body along the up and down directions, the bottom wall of the anti-overflow cavity has a first bottom wall portion, and the first bottom wall portion includes the bottom wall of the exhaust cavity. At least one of the bottom wall of the exhaust cavity and the first bottom wall portion is not provided with an opening.

[0010] According to the present application, by providing an overflow prevention cavity in the lid, whose bottom wall covers the opening of the cooking cavity, and providing a bottom wall through-hole connecting the cooking cavity with the overflow prevention cavity, the overflow prevention cavity can absorb overflow energy and store overflowing bubbles, thereby achieving overflow prevention. A steam exhaust component is provided above the overflow prevention cavity to exhaust steam. In the vertical projection of the lid, the first portion of the bottom wall and the bottom wall of the steam exhaust cavity are not simultaneously provided with openings, preventing bubbles from directly entering the steam exhaust cavity from the bottom wall, further preventing bubbles from escaping from the overflow prevention cavity, and thus improving overflow prevention capabilities.

[0011] Optionally, the exhaust hole is provided on a side wall of the exhaust cavity.

[0012] According to the present application, the exhaust holes are arranged on the side walls of the exhaust chamber, so that the side walls can block the bubbles (foam) accumulated at the bottom wall holes from entering the exhaust chamber.

[0013] Optionally, the height difference between the lower edge of the exhaust hole and the bottom of the exhaust component is at least 5 mm.

[0014] According to this application, there is a certain height difference between the lower edge of the exhaust hole and the bottom of the exhaust component, so that the exhaust hole has a certain height, preventing bubbles (foam) accumulated at the bottom wall hole from overflowing from the exhaust hole.

[0015] Optionally, the exhaust through hole includes a first exhaust through hole and a second exhaust through hole, and the first exhaust through hole and the second exhaust through hole are staggered on the side wall of the exhaust cavity along the circumferential direction and the up-down direction of the exhaust cavity.

[0016] According to the present application, the first exhaust hole and the second exhaust hole are staggered in the circumferential direction and the vertical direction, so that the foam entering the exhaust chamber can be further broken up by the change of the exhaust channel.

[0017] Optionally, the cover body includes a lining cover, and the exhaust component is detachably connected to the lining cover, or the exhaust component and the lining cover are integrally formed.

[0018] According to the present application, the exhaust component can be flexibly arranged. The exhaust component is detachable for easy maintenance and cleaning. The exhaust component is integrally formed with the liner cover, resulting in a simple structure and low cost.

[0019] Optionally, the first portion of the bottom wall includes a platform area, and the steam exhaust component is arranged above the platform area.

[0020] According to the present application, the exhaust component is arranged above the platform area to facilitate the exhaust hole to maintain a distance from the first part of the bottom wall, thereby preventing bubbles (foam) accumulated at the bottom wall hole from overflowing from the exhaust hole.

[0021] Optionally, the ratio of the width of the platform area to the width of the bottom wall of the overflow prevention cavity is a third ratio, and the value range of the third ratio is [1 / 20, 1 / 5].

[0022] According to the present application, if the third ratio is too small, the bottom wall through hole will be too close to the exhaust component, causing foam to overflow from the exhaust component. If the third ratio is too large, the ability of the overflow prevention cavity to accommodate foam will be affected, affecting the overflow prevention effect.

[0023] Optionally, the bottom wall of the exhaust cavity is provided with a reflux hole, and the first portion of the bottom wall is not provided with a through hole.

[0024] According to this application, a reflux hole is provided on the bottom wall of the exhaust chamber to facilitate the reflux of liquid generated by the bursting of bubbles when they enter the exhaust chamber. At the same time, no through holes are provided on the bottom wall to prevent bubbles from directly entering the exhaust chamber from the reflux hole or blocking the reflux hole.

[0025] Optionally, the height difference between the lower surface of the bottom wall of the exhaust cavity and the platform area is not greater than 3 mm; and / or

[0026] The outer diameter of the bottom wall of the exhaust cavity is not greater than the width of the platform area.

[0027] According to the present application, the outer diameter of the bottom wall of the exhaust chamber is no greater than the width of the platform area, thereby preventing bubbles from the bottom wall through-hole from overflowing into the exhaust chamber through the reflux hole at the bottom of the anti-overflow valve. The lower surface of the bottom wall of the exhaust chamber is not too far from the platform area, further preventing foam from the bottom wall through-hole from entering the gap between the bottom wall of the exhaust chamber and the platform area, and directly overflowing into the exhaust chamber through the reflux hole at the bottom of the anti-overflow valve.

[0028] Optionally, the bottom wall further includes a second bottom wall portion and a fourth bottom wall portion, and the first bottom wall portion and the fourth bottom wall portion are respectively located on opposite sides of the second bottom wall portion.

[0029] The bottom wall through hole includes a first bottom wall through hole and a second bottom wall through hole, wherein the first bottom wall through hole is arranged in the second part of the bottom wall, the second bottom wall through hole is arranged in the fourth part of the bottom wall, and the first bottom wall through hole is smaller than the second bottom wall through hole.

[0030] According to the present application, by arranging first and second bottom wall through holes of different sizes at different positions on the bottom wall to connect the overflow prevention cavity, the smaller first bottom wall through hole has a greater resistance to the foam, so that the foam tends to enter the overflow prevention cavity from the second bottom wall through hole, while the steam can enter the overflow prevention cavity from the first bottom wall through hole. In this way, the bubbles (foam) and steam enter the overflow prevention cavity through different bottom wall through holes respectively, thereby achieving gas-liquid separation. The foam and steam in the overflow prevention cavity will both move toward the exhaust component. The first and fourth bottom wall portions are respectively located on opposite sides of the second bottom wall portion, so that the steam is located on the path that the foam must pass through. The steam can break through the foam, thereby further improving the overflow prevention effect.

[0031] Optionally, the total area of ​​the exhaust holes is not less than the total area of ​​the first bottom wall holes.

[0032] According to the present application, the total area of ​​the exhaust holes is not less than the total area of ​​the first bottom wall holes, so that the steam exhausted from the first bottom wall holes can smoothly enter the exhaust cavity.

[0033] Optionally, the second portion of the bottom wall is higher than the fourth portion of the bottom wall.

[0034] According to the present invention, the first bottom wall through-hole is higher than the second bottom wall through-hole, ensuring that the foam does not contact the first bottom wall through-hole. This facilitates the formation of a pressure differential between the two, promoting gas to enter the overflow prevention cavity through the first bottom wall through-hole. The second bottom wall through-hole is positioned lower, allowing the foam to enter the overflow prevention cavity preferentially through the second bottom wall through-hole. This results in better gas-liquid separation and better overflow prevention.

[0035] Optionally, a 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.

[0036] According to the present application, there is a certain height difference between the first bottom wall through hole and the second bottom wall through hole to avoid the pressure difference being too small, which affects the anti-overflow effect.

[0037] Optionally, the second bottom wall portion and the fourth bottom wall portion are arranged in a radial direction, the fourth bottom wall portion is located on the outer periphery of the second bottom wall portion, and the first bottom wall portion is located on the inner periphery of the second bottom wall portion.

[0038] According to the present application, the fourth portion of the bottom wall, the second portion of the bottom wall and the first portion of the bottom wall are arranged in a radial direction, adapted to the cross-sectional shape of the cooking cavity, and helpful for preventing overflow.

[0039] Optionally, the bottom wall further includes a third bottom wall portion, which is an annular area located between the first bottom wall through hole and the second bottom wall through hole along the radial direction.

[0040] In a cross-section of the cover body passing through the geometric center point of the second portion of the bottom wall and extending in the up-down direction, the third portion of the bottom wall includes two sub-bottom wall third portions respectively located on both sides of the geometric center point of the second portion of the bottom wall, wherein any one of the sub-bottom wall third portions has an arbitrary first position point and a second position point, wherein when the first position point is closer to the second portion of the bottom wall than the second position point, the first position point is not lower than the second position point.

[0041] According to the present application, the two sub-bottom wall third portions of the bottom wall third portion are each configured to extend downward from the bottom wall second portion to the bottom wall fourth portion, forming an upwardly convex conical structure on the bottom wall of the overflow prevention cavity. This creates 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. Simultaneously, it facilitates the return of liquid to the second bottom wall through-hole after bubbles burst.

[0042] Optionally, the area of ​​each of the first bottom wall through holes is in the range of [1.77 mm2, 20 mm2]; and or

[0043] The area of ​​each of the second bottom wall through holes ranges from [20 mm2 to 300 mm2].

[0044] According to the present application, by limiting the single area of ​​the first bottom wall through hole and the second bottom wall through hole, the first bottom wall through hole can better block the bubbles (foam) in the pot, avoiding the situation where bubbles are discharged from the first bottom wall through hole and overflow the pot, realizing gas-liquid diversion, and at the same time increasing the steam airflow velocity at the first bottom wall through hole, making it easier for steam to break through the bubbles in the anti-overflow cavity.

[0045] Optionally, a 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 a value range of the second ratio is [2, 5].

[0046] According to the present application, by limiting the ratio of the total area of ​​the second bottom wall through holes to the total area of ​​the first bottom wall through holes, the ability of the overflow prevention cavity to receive steam and foam can be balanced to achieve a better overflow prevention effect.

[0047] 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.

[0048] According to the present application, the edge of the first bottom wall through hole is at a certain distance from the edge of the second bottom wall through hole, ensuring that the bubbles (foam) entering from the second bottom wall through hole have sufficient distance to move, reducing the kinetic energy of the bubbles (foam) when moving to the first bottom wall through hole, and also allowing the foam to cool down and reduce the risk of overflow.

[0049] Optionally, the cover body further includes a pot mouth sealing ring, which is arranged on the outer periphery of the bottom wall and is used for sealingly contacting the cooking cavity opening.

[0050] According to the present application, the pot mouth sealing ring is used to achieve sealing of the cooking cavity opening, thereby forming a cooking space between the cover body and the cooking cavity.

[0051] A second aspect of the present application provides a cooking appliance, comprising:

[0052] A pot body, the pot body comprising a cooking cavity for holding food, the cooking cavity having a cooking cavity opening for taking food in and out; and

[0053] According to any one of the cover bodies of the first aspect, the cover body is used to cover the pot body.

[0054] According to the present application, the lid is used to cover the pot body. An overflow prevention cavity is disposed within the lid. The bottom wall of the overflow prevention cavity is provided with a through-hole connecting the cooking cavity and the overflow prevention cavity. The overflow prevention cavity absorbs overflow energy and stores overflowing bubbles, thereby preventing overflow. A steam exhaust component is provided above the overflow prevention cavity to discharge steam. In the vertical projection of the lid, the first portion of the bottom wall and the bottom wall of the steam exhaust cavity are not simultaneously provided with openings. This prevents bubbles from directly entering the steam exhaust cavity from the bottom wall, further preventing bubbles from escaping from the overflow prevention cavity, thereby improving overflow prevention capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The following drawings of the present application are used as part of the present application for understanding the present application. The drawings show representative embodiments of the present application and are used to explain the principles of the present application rather than to limit the present application.

[0056] In the attached figure:

[0057] Figure 1 is a schematic perspective view of a cooking appliance according to a specific embodiment of the present application;

[0058] Figure 2 A schematic side cross-sectional view of a cooking appliance according to a first embodiment of the present application, wherein a portion of the pot body structure is omitted;

[0059] Figure 3 for Figure 2 A side cross-sectional schematic diagram of the cover body;

[0060] Figure 4 for Figure 2 A three-dimensional schematic diagram of a detachable cover;

[0061] Figure 5 for Figure 2 A bottom view of the removable cover;

[0062] Figure 6for Figure 2 A schematic top view of the removable cover;

[0063] Figure 7 for Figure 2 A schematic side cross-sectional view of the removable cover;

[0064] Figure 8 for Figure 7 A magnified schematic diagram of the structure at center A;

[0065] Figure 9 for Figure 3 A bottom view of the cover plate in FIG.

[0066] Figure 10 for Figure 3 A schematic side view of the cover plate in FIG.

[0067] Figure 11 for Figure 3 A schematic side view of a first deformation example of the cover plate;

[0068] Figure 12 for Figure 3 A side view schematic diagram of a second deformation example of the cover plate;

[0069] Figure 13 for Figure 3 A schematic side view of a third variant example of the cover plate;

[0070] Figure 14 for Figure 3 A schematic side view of a fourth deformation example of the cover plate;

[0071] Figure 15 for Figure 3 A schematic top view of a fifth deformation example of the cover plate;

[0072] Figure 16 for Figure 3 A schematic top view of a sixth deformation example of the cover plate in FIG.

[0073] Figure 17 for Figure 2 A three-dimensional schematic diagram of the exhaust components;

[0074] Figure 18 for Figure 2 A side cross-sectional schematic diagram of the exhaust component in FIG.

[0075] Figure 19 for Figure 2 A schematic top view of the exhaust component in FIG.

[0076] Figure 20 for Figure 2 A bottom view schematic diagram of the exhaust component in FIG.

[0077] Figure 21 for Figure 2 A three-dimensional schematic diagram of a modified example of the exhaust component in FIG.

[0078] Figure 22 for Figure 21 A schematic front cross-sectional view of the exhaust component in FIG.

[0079] Figure 23 for Figure 21 Another three-dimensional schematic diagram of the exhaust component;

[0080] Figure 24 is a side cross-sectional schematic diagram of a cover of a cooking utensil according to a second embodiment of the present application;

[0081] Figure 25 is a side cross-sectional schematic diagram of a cooking appliance according to a third embodiment of the present application, wherein a portion of the pot body structure is omitted;

[0082] Figure 26 for Figure 25 A schematic side view of the cover plate in FIG.

[0083] Figure 27 is a side cross-sectional schematic diagram of a cover of a cooking utensil according to a fourth embodiment of the present application;

[0084] Figure 28 for Figure 27 A three-dimensional schematic diagram of a detachable cover;

[0085] Figure 29 for Figure 27 A schematic side cross-sectional view of the removable cover;

[0086] Figure 30 for Figure 27 A schematic top view of the removable cover;

[0087] Figure 31 for Figure 27 A bottom view of the removable cover;

[0088] Figure 32 for Figure 29 An enlarged schematic diagram of the structure at B in FIG;

[0089] Figure 33 for Figure 27 A perspective schematic diagram of the removable cover in FIG, wherein the lower cover is omitted;

[0090] Figure 34 for Figure 27 A schematic cross-sectional view of the removable cover in FIG, wherein the lower cover is omitted;

[0091] Figure 35 for Figure 27A three-dimensional schematic diagram of the lower cover plate in FIG, wherein a cover plate sealing ring is sleeved on the flange of the lower cover plate;

[0092] Figure 36 for Figure 27 A cross-sectional schematic diagram of the lower cover plate in FIG, wherein a cover plate sealing ring is sleeved on the flange of the lower cover plate.

[0093] Description of reference numerals:

[0094] 10 / 110 / 210 / 310: Cover

[0095] 11: Lining cover

[0096] 12: Partition

[0097] 13: Face cover

[0098] 14: Cover sealing ring

[0099] 15: Anti-overflow cavity

[0100] 16: Top temperature sensor

[0101] 18: Lining cover exhaust cavity

[0102] 19: Support ribs

[0103] 20 / 220 / 320: Bottom wall of the overflow prevention chamber

[0104] 21: Bottom wall part 1

[0105] 21A: Platform area

[0106] 22: Bottom wall part 2

[0107] 23: The third part of the bottom wall

[0108] 23A: The third part of the sub-bottom wall

[0109] 24: Bottom wall part 4

[0110] 25: Bottom wall through hole

[0111] 25A: First bottom wall through hole

[0112] 25B: Second bottom wall through hole

[0113] 26: Sensor through hole

[0114] 30 / 130: Exhaust parts

[0115] 30A: exhaust chamber

[0116] 31: Side wall of the exhaust chamber

[0117] 32: Bottom wall of the exhaust chamber

[0118] 33: Exhaust hole

[0119] 33A: First exhaust hole

[0120] 33B: Second exhaust hole

[0121] 34: Reflux hole

[0122] 39: Outer flange

[0123] 40 / 240 / 340: removable cover

[0124] 41 / 241: Cover

[0125] 41A: Cover side wall

[0126] 41B: Cover installation part

[0127] 41C: Step

[0128] 41D: Cover mounting hole

[0129] 41E: Connection hole

[0130] 41F: Upper end of side wall

[0131] 41G: Lower end of side wall

[0132] 41H / 241H / 341H: bottom wall of cover

[0133] 41J: flange

[0134] 42: First sealing ring

[0135] 42A: First sealing part

[0136] 42B: First installation part

[0137] 42C: First mounting hole

[0138] 43: Pot mouth sealing ring

[0139] 43A: Pot mouth sealing part

[0140] 43B: Extension

[0141] 43C: First limiter

[0142] 43D: Second limiter

[0143] 43E: First support part

[0144] 43F: Second support part

[0145] 44: Pressing the circle

[0146] 44B: convex part

[0147] 44C: Press ring mounting hole

[0148] 45: Diversion trough

[0149] 46: Upper cover

[0150] 46A: Lining cover sealing ring

[0151] 46B: Buckle

[0152] 46C: Upper cover plate exhaust hole

[0153] 46D: Reinforcement slot

[0154] 46E: Outer area

[0155] 47: Removable cover

[0156] 47A: Seat body

[0157] 47C: Limiting slot

[0158] 47D: Fastener hole

[0159] 47E: Mounting slot

[0160] 48: Cover seal

[0161] 51: Upper cover connector

[0162] 51A: First connection part

[0163] 51B: Second connection part

[0164] 52: Lower cover connector

[0165] 52A: Connection slot

[0166] 53: Connector seat

[0167] 60: Claypot

[0168] 61: Cooking Chamber

[0169] 63: Pot opening

[0170] 64: Pot

[0171] 100 / 200: Cooking utensils

[0172] 341: Lower cover

[0173] DA: Axial direction

[0174] DC: Circumferential direction

[0175] DR: radial direction DETAILED DESCRIPTION

[0176] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described in order to avoid confusion with the present application.

[0177] In order to thoroughly understand the present application, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other embodiments.

[0178] Ordinal numbers such as "first" and "second" used in this application are merely identifiers and do not convey any other meaning, such as a specific order. Furthermore, for example, the term "first component" itself does not imply the existence of a "second component," nor does the term "second component" itself imply the existence of a "first component." The use of terms such as "first," "second," and "third" does not indicate any order; these terms should be interpreted as names.

[0179] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this application are for illustrative purposes only and are not limiting.

[0180] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0181] Unless otherwise stated, numerical ranges herein include not only the entire range between its two endpoints but also the several sub-ranges contained therein.

[0182] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0183] like Figure 1As shown, in a specific embodiment, the cooking utensil 100 according to the present application may include a pot body 60 and a lid body 10. The pot body 60 includes a pot inner 64. Generally, the pot body 60 may have a cylindrical (or other shaped) accommodating cavity, and the pot inner 64 may be freely placed in or taken out of the accommodating 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 a pot wall. The capacity of the pot inner 64 is generally 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 opening 63 for taking in and putting in food ingredients, and the internal space of the pot inner 64 forms a cooking cavity 61, which is used to hold and cook food ingredients. The volume of the pot inner 64 is the volume of the cooking cavity 61, and the pot inner opening 63 is the opening of the cooking cavity 61, also referred to as the cooking cavity opening 63.

[0184] The cover 10 can be pivotally connected to the pot body 60 via a pivot shaft to cover the pot body 60. Figure 2 As shown, when the lid 10 covers the pot body 60, a cooking space is defined between the lid 10 and the inner pot 64. In different embodiments of the present application, the relative positions of the lid 10 and the pot body 60 may vary when the lid 10 covers the pot body 60, so the cooking cavity 61 and the cooking space may not be identical. For example, when the bottom portion of the lid 10 extends into the inner pot 64, the cooking space is a portion of the cooking cavity 61, and the volume of the cooking space is smaller than the volume of the cooking cavity 61.

[0185] The cooking appliance 100 includes 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 cooking. The heating device can be configured in the form of a heating plate, for example.

[0186] The cooking appliance 100 has a top temperature sensor 16, which is usually arranged on the cover 10 for detecting the top temperature of the cooking space. A bottom temperature sensor is also arranged in the pot body 60 for detecting the bottom temperature of the cooking space.

[0187] In addition, the cooking appliance 100 further includes a control device (not shown) for controlling the cooking of the cooking appliance 100. The control device may be, for example, a microprocessor unit (MCU), which is electrically connected to the heating device and the temperature sensor so that the heating device can control its operation according to the detection value of the temperature sensor.

[0188] The cooking appliance 100 generally further includes a human-machine interaction device 70 , which can be provided on the pot body 60 or the lid body 10 and connected to the control device. The human-machine interaction device 70 can facilitate user operation and prompt the user with information related to the cooking process.

[0189] It should be noted that, in the present application, the directional terms "upper" and "lower" are those directions determined based on the cooking appliance 100 being placed upright with the lid 10 in a closed state.

[0190] It should be noted that although part of the structure of the cooking appliance 100 is schematically described at this point, these examples are merely exemplary and cannot be used as a limitation on the structure of the cooking appliance 100 of the embodiment of the present application.

[0191] like Figure 2 As shown, an anti-overflow cavity 15 is provided inside the cover body 10. The anti-overflow cavity 15 is configured to communicate with the outside through a steam exhaust component 30 (for example, a steam valve). When the cover body 10 covers the pot body 60, the bottom wall 20 of the anti-overflow cavity 15 is used to cover the cooking cavity opening 63. In other words, the bottom wall 20 of the anti-overflow cavity 15 forms the lower surface of the cover body 10. The bottom wall 20 of the anti-overflow cavity 15 is provided with at least one bottom wall through hole 25 for connecting the anti-overflow cavity 15 with the cooking cavity 61. The anti-overflow cavity 15 is used to absorb energy overflowing from the cooking cavity 61 and store bubbles (foam) overflowing from the cooking cavity 61, thereby playing a role in preventing overflow.

[0192] In order to improve the anti-overflow effect, the volume of the anti-overflow cavity 15 and the volume of the cooking cavity 61 must meet a certain relationship. Specifically, the ratio between the volume of the anti-overflow cavity 15 and the volume of the cooking cavity 61 is a first ratio, and the value range of the first ratio is [1 / 40, 4 / 5], for example, 1 / 15. If the first ratio is too large, the volume of the anti-overflow cavity 15 is larger than the volume of the cooking cavity 61, which will not only increase the material cost of the anti-overflow cavity 15, but also indirectly lead to a reduction in cooking space and low space utilization. If the first ratio is too small, the volume of the anti-overflow cavity 15 is smaller than the volume of the cooking cavity 61, which will weaken the ability of the anti-overflow cavity 15 to store bubbles (foam), resulting in poor anti-overflow effect.

[0193] like Figure 2 and Figure 3As shown, in the first embodiment of the present application, the cover body 10 includes a top cover 13, a lining cover 11 and a removable cover 40. The lining cover 11 constitutes the skeleton of the cover body 10, and various components in the cover body 10 (such as the top temperature sensor 16 and the exhaust component 30) are installed on the lining cover 11. The lining cover 11 is, for example, pivotally connected to the pot body 60 so that the cover body 10 can cover the pot body 60. The top cover 13 forms the outer shell of the cover body 10 and is installed on the lining cover 11. The removable cover 40 is detachably connected to the lining cover 11 and is located at the bottom of the cover body 10. The removable cover 40 is used to cover the cooking cavity opening 63.

[0194] In the first embodiment, the removable cover 40 includes a cover plate 41, which is detachably connected to the liner cover 11 and covers the cooking cavity opening 63. The cover plate 41 is provided with a sensor through-hole 26 for allowing the top temperature sensor 16 to pass through the sensor through-hole 26. The top temperature sensor 16 can pass through the sensor through-hole 26 to detect the temperature of the cooking space.

[0195] The lining cover 11 forms the top wall of the overflow prevention cavity 15. A partition 12 may also be provided on the lower surface of the lining cover 11. The partition 12 forms the top wall of the overflow prevention cavity 15. The partition 12 is, for example, a metal plate, such as an aluminum plate. The cover plate 41 includes a cover plate bottom wall 41H and a cover plate side wall 41A. The cover plate bottom wall 41H forms the bottom wall 20 of the overflow prevention cavity 15. The cover plate bottom wall 41H is provided with at least one bottom wall through-hole 25, thereby connecting the overflow prevention cavity 15 with the cooking cavity 61. The cover plate side wall 41A extends upward from the outer peripheral edge of the cover plate bottom wall 41H to form the side wall of the overflow prevention cavity 15.

[0196] The removable cover 40 further includes a first sealing ring 42 connected to the upper end of the cover plate side wall 41A. The first sealing ring 42 is made of, for example, an elastic material and is configured to seal against the lower surface of the liner cover 11, thereby forming an anti-overflow cavity 15 between the liner cover 11 and the cover plate 41. It can also be understood that the cover plate side wall 41A and the first sealing ring 42 together constitute the sidewall of the anti-overflow cavity 15.

[0197] like Figures 2 to 8 As shown, the removable cover 40 also includes a pot mouth sealing ring 43, which is arranged on the outer periphery of the cover plate 41. The pot mouth sealing ring 43 is made of elastic material, for example, and is used to seal and contact the cooking cavity opening 63, thereby forming a cooking space between the cover body 10 and the cooking cavity 61.

[0198] like Figures 4 to 7As shown, in order to connect the cover plate 41, the first sealing ring 42, and the pot mouth sealing ring 43, the removable cover 40 further includes a removable cover seat 47 and a pressure ring 44. The removable cover seat 47 is configured to be removably mounted to the lining cover 11. The cover plate 41, the first sealing ring 42, and the pot mouth sealing ring 43 are all removably connected to the removable cover seat 47, thereby being removably connected to the lining cover 11. The pressure ring 44 is removably connected to the removable cover seat 47, and is used to mount the cover plate 41, the first sealing ring 42, and the pot mouth sealing ring 43 to the removable cover seat 47.

[0199] like Figure 4 As shown, the removable cover seat 47 includes an annular seat body 47A. At least part of the cover side wall 41A and at least part of the pot mouth sealing ring 43 are surrounded by the inner peripheral surface of the seat body 47A. Specifically, as shown in FIG. Figure 8 As shown, the cover side wall 41A includes an upper side wall end portion 41F and a lower side wall end portion 41G, wherein the upper side wall end portion 41F is located above the lower side wall end portion 41G. The upper side wall end portion 41F is surrounded by the inner circumferential surface of the seat body 47A. The pot mouth sealing ring 43 includes a pot mouth sealing portion 43A and an extension portion 43B. The pot mouth sealing portion 43A is used to seal the cooking cavity opening 63. The extension portion 43B extends upward from the upper end of the pot mouth 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 side wall end portion 41F in the radial direction DR, that is, the extension portion 43B is located between the seat body 47A and the upper side wall end portion 41F in the radial direction DR.

[0200] The cover plate 41 also includes a cover plate mounting portion 41B extending outward in the radial direction DR from the upper edge of the side wall upper end portion 41F. The lower surface of the cover plate mounting portion 41B is connected to the upper surface of the seat body 47A. The pot mouth sealing ring 43 also includes a first stopper 43C extending outward in the radial direction DR from the upper end of the extension portion 43B. The lower surface of the first stopper 43C is connected to the upper surface of the seat body 47A. Because the extension portion 43B is located outward of the side wall upper end portion 41F in the radial direction DR, the first stopper 43C is located below the cover plate mounting portion 41B and between the seat body 47A in the vertical direction (i.e., the axial direction DA). The upper surface of the pot mouth sealing portion 43A can abut the lower surface of the seat body 47A, further limiting the pot mouth sealing ring 43 relative to the removable cover seat 47 in the axial direction DA.

[0201] 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. The first sealing portion 42A is used to seal against the 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 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 mouth sealing ring 43 from above, the pressure ring 44 contacts the cover plate 41 from above, and the pressure ring 44 contacts the first sealing ring 42 from above). The first sealing ring 42, the cover plate 41, and the pot mouth sealing ring 43 are sandwiched between the pressure ring 44 and the seat body 47A of the removable cover seat 47, thereby allowing the pot mouth sealing ring 43, the first sealing ring 42, and the cover plate 41 to be detachably connected to the removable cover seat 47.

[0202] 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. A pressure ring mounting hole 44C, a first mounting hole 42C, and a cover mounting hole 41D are provided on the pressure ring 44, the first mounting portion 42B, and the cover mounting portion 41B at positions corresponding to the fastener hole 47D, respectively. Thus, the fastener can be detachably connected to the fastener hole 47D after passing through the pressure ring 44, the first mounting portion 42B, and the cover mounting portion 41B in sequence.

[0203] Furthermore, the fastener can be configured as a screw, for example, with threads matching the screw inside the fastener hole 47D. Multiple fastener holes 47D can be evenly spaced along the circumferential direction DC of the seat body 47A, thereby better connecting the pressure ring 44 and the removable cover seat 47 via multiple corresponding fasteners. The lower surface of the pressure ring 44 can be configured 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 diameters of the first mounting hole 42C and the mounting hole 41D of the cover plate 41 are not less than the outer diameter of the protrusion 44B, allowing the protrusion 44B to pass through. Above the fastener hole 47D, the seat body 47A has a mounting groove 47E for accommodating 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 removably connecting with the fastener hole 47D. When assembling the removable cover 40 , the raised portion 44B plays a role of pre-positioning, which can pre-connect the first sealing ring 42 , the cover plate 41 and the removable cover seat 47 before fastening, thereby facilitating the installation of fasteners.

[0204] The pot mouth sealing ring 43 also includes a second stopper 43D, which protrudes from the lower surface of the first stopper 43C. A stopper groove 47C is provided on the upper surface of the seat body 47A, which abuts the first stopper 43C. This groove 47C is configured as a groove that mates with the second stopper 43D and accommodates the second stopper 43D. The second stopper 43D abuts the stopper groove 47C, thereby securing the pot mouth sealing ring 43 relative to the removable lid seat 47 in the radial direction DR.

[0205] like Figure 8 As shown, pot mouth sealing ring 43 further includes a first support portion 43E, which protrudes from the upper surface of first stop portion 43C and is configured to abut the lower surface of cover plate mounting portion 41B. First support portion 43E, made of a small amount of material, achieves sealed contact between pot mouth sealing ring 43 and cover plate 41, preventing foam, gas, and the like generated within cooking cavity 61 from contaminating removable cover seat 47 or, for example, corroding fasteners, thereby extending the service life of removable cover 40.

[0206] The pot mouth sealing ring 43 may further be provided with a second supporting portion 43F, which is constructed as a protruding rib extending inward in the radial direction DR on the inner circumferential surface of the pot mouth 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 located above the step portion 41C is greater than the radial dimension of the cover plate sidewall 41A located below the step portion 41C. The upper surface of the second supporting portion 43F abuts the lower surface of the step portion 41C, thereby supporting the cover plate 41 and further stabilizing the connection between the various components of the removable cover 40.

[0207] like Figures 4 to 6 As shown, the bottom wall 41H of the cover plate, i.e., the bottom wall 20 of the overflow prevention chamber 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.

[0208] When the food in the cooking chamber 61 boils, the resulting foam and water vapor enter the overflow prevention chamber 15 through the bottom wall through-holes 25. Because foam has a certain viscosity and a large volume, the resistance to its passage through the first bottom wall through-holes 25A is greater than the resistance to its passage through the second bottom wall through-holes 25B. Consequently, the foam tends to enter the overflow prevention chamber 15 through the second bottom wall through-holes 25B. Water vapor, however, is not significantly obstructed by the first bottom wall through-holes 25A and can enter the overflow prevention chamber 15 through the first bottom wall through-holes 25A. Thus, the different sizes of the bottom wall through-holes 25 achieve vapor-liquid separation, meaning that foam and water vapor tend to enter the overflow prevention chamber 15 through different channels. Within the overflow prevention chamber 15, the water vapor's own temperature and pressure can break through the foam, reducing foam accumulation in the overflow prevention chamber 15 and further enhancing the overflow prevention effect. After the foam bursts, the liquid can return to the cooking chamber 41 through the bottom wall through-holes 25.

[0209] The multiple first bottom wall through holes 25A are centrally arranged, which is beneficial to ensuring the temperature and pressure of the water vapor in the overflow prevention cavity 15. The second bottom wall through holes 25B are far away from the first bottom wall through holes 25A, which is beneficial to the centralized arrangement of the multiple first bottom wall through holes 25A. Figure 9 As shown, the bottom wall 41H of the cover plate includes two different areas, the second bottom wall portion 22 and the fourth bottom wall portion 24. The first bottom wall through hole 25A is arranged in the second bottom wall portion 22, and the second bottom wall through hole 25B is arranged in the fourth bottom wall portion 24, thereby realizing the centralized arrangement of multiple first bottom wall through holes 25A.

[0210] like Figures 10 to 14 As shown, preferably, the second bottom wall portion 22 can be higher than the fourth bottom wall portion 24, so that the first bottom wall through hole 25A is higher than the second bottom wall through hole 25B. In this way, the boiling foam will not block the first bottom wall through hole 25A, so that the resistance of steam passing through the first bottom wall through hole 25A is smaller, thereby better achieving 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 3mm. The second bottom wall through hole 25B can be set at the lowest position of the bottom wall 41H of the cover plate. For example, as Figure 10 As shown, the cover plate bottom wall 41H can be constructed as a tapered structure that is wider at the bottom and narrower at the top. The second bottom wall portion 22 and the fourth bottom wall portion 24 are arranged in the radial direction, and the fourth bottom wall portion 24 is located on the outer periphery of the second bottom wall portion 22 .

[0211] Combine Figure 2 、 Figure 3 and Figure 10It can be seen that, preferably, the first bottom wall through hole 25A is closer to the exhaust component 30 than the second bottom wall through hole 25B, or in other words, the second bottom wall portion 22 is closer to the exhaust component 30 than the fourth bottom wall portion 24. The exhaust component 30 is a channel that connects the overflow prevention cavity 15 with the outside world, and the contents in the overflow prevention cavity 15 will all move toward the exhaust component 30. When the first bottom wall through hole 25A is closer to the exhaust component 30, water vapor will preferentially occupy the surrounding space of the exhaust component 30, so that the foam must encounter water vapor to achieve the bubble breaking effect. Otherwise, the foam may not be broken by the water vapor and will be discharged from the exhaust component 30, causing overflow.

[0212] exist Figures 2 to 10 In the embodiment described above, the exhaust component 30 is not located on the central axis of the cooking cavity 61. In the projection of the cover 10 in the vertical direction, the geometric center point M of the second bottom wall portion 22 does not coincide with the geometric center point N of the bottom wall 41H of the cover plate (see FIG. Figure 9 ), the cover plate bottom wall 41H is configured as an oblique cone to facilitate the position of the bottom wall second portion 22 closer to the exhaust component 30. Of course, to position the first bottom wall through hole 25A closer to the exhaust component 30, the bottom wall second portion 22 and the bottom wall fourth portion 24 can also be arranged in the left-right direction in the figure, with the bottom wall second portion 22 on the right and the bottom wall fourth portion 24 on the left.

[0213] Of course, the geometric center point M of the second bottom wall portion 22 may also coincide with the geometric center point N of the cover plate bottom wall 41H, so that the cover plate bottom wall 41H is constructed as a right cone, thereby reducing the difficulty of processing the cover plate 41 .

[0214] The foam in the overflow prevention cavity 15 cools down as it moves, which facilitates bubble breaking. To ensure that bubbles entering through 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 no less than 10 mm. In other words, 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 no less than 10 mm.

[0215] When the cover plate bottom wall 41H is constructed as a tapered structure, wider at the bottom and narrower at the top (convex at the top), the pressure at the bottom wall fourth portion 24 is greater than the pressure at the bottom wall second portion 22 according to Bernoulli's principle, further promoting the discharge of gas (water vapor) from the first bottom wall through hole 25A along the tapered side. The line connecting the first bottom wall through hole 25A and the second bottom wall through hole 25B forms a first angle with the horizontal plane. To facilitate the backflow of liquid from the second bottom wall through hole 25B, the first angle is greater than or equal to 5°.

[0216] In order to make the first bottom wall through hole 25A better block the foam in the cooking cavity 61 and at the same time increase the steam airflow velocity at the first bottom wall through hole 25A (to facilitate breaking the bubbles in the overflow prevention cavity 15). The area of ​​each first bottom wall through hole 25A is in the range of [1.77mm2, 20mm2], for example, it can be 1.77mm2, 3mm2 or 20mm2. For example, when the first bottom wall through hole 25A is circular, its diameter can be 1.5-2.5mm. In order to make the second bottom wall through hole 25B more suitable for the passage of foam, the area of ​​each second bottom wall through hole 25B is in the range of [20mm2, 300mm2], for example, it can be 20mm2, 150mm2 or 300mm2. For example, when the second bottom wall through hole 25B is circular, its diameter can be 6-10mm.

[0217] In order to adapt to the receptive capacity of the anti-overflow cavity 15, the number or total area of ​​the first bottom wall through holes 25A and the second bottom wall through holes 25B has a preferred range. Moreover, the number or total area of ​​the two is adapted to balance the amount of gas and foam received by the anti-overflow cavity 15, thereby achieving a better anti-overflow effect. Specifically, the total area of ​​the first bottom wall through holes 25A ranges from [60mm2, 200mm2], for example, it can be 60mm2, 100mm2 or 200mm2. The total area of ​​the second bottom wall through holes 25B ranges from [100mm2, 1000mm2], for example, it can be 100mm2, 300mm2 or 1000mm2. The ratio of the total area of ​​the second bottom wall through holes 25B to the total area of ​​the first bottom wall through holes 25A is a second ratio, and the second ratio ranges from [2, 5], for example, it can be 2, 3 or 5. The number of the first bottom wall through holes 25A is 10 to 64, for example, 10, 40, or 64. The number of the second bottom wall through holes 25B is 5 to 30, for example, 5, 10, or 30.

[0218] like Figures 9 to 14 As shown, the fourth bottom wall portion 24 can be constructed as an annular area with the geometric center point N of the cover bottom wall 41H as the center. For example, the fourth bottom wall portion 24 can be constructed as an annular area extending along a plane at the lowest position of the cover bottom wall 41H. The outer periphery of the fourth bottom wall portion 24 is the outer periphery of the cover bottom wall 41H, so that the second bottom wall through hole 25B can be set at the lowest position of the cover bottom wall 41H. Figures 4 to 6 and Figure 9 As shown, the plurality of second bottom wall through holes 25B may be evenly arranged along the circumferential direction DC on the cover plate bottom wall 41H.

[0219] like Figure 10As shown, in a cross section of the cover body 10 passing through the geometric center point M of the second bottom wall portion 22 and extending in the vertical direction, the second bottom wall portion 22 extends along an inclined straight line, and the inclined straight line intersects the inner edge of the fourth bottom wall portion 24. The first bottom wall through hole 25A can be located near the top of the tapered structure, thereby ensuring a maximum height difference and a maximum distance between the first bottom wall through hole 25A and the second bottom wall through hole 25B.

[0220] like Figures 10 to 14 As shown, the cover plate bottom wall 41H also includes a bottom wall third portion 23 located between the bottom wall second portion 22 and the bottom wall fourth portion 24. For example, the bottom wall third portion 23 is configured as an annular region located between the first bottom wall through-hole 25A and the second bottom wall through-hole 25B along the radial direction DR. The bottom wall second portion 22 and the bottom wall fourth portion 24 are respectively located on either side of the bottom wall third portion 23. In a cross section of the cover body 10 passing through the geometric center point M of the bottom wall second portion 22 and extending in the up-down direction, the bottom wall third portion 23 can include two sub-bottom wall third portions 23A located on either side of the geometric center point M of the bottom wall second portion 22. Any sub-bottom wall third 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 bottom wall second 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 bottom wall portion 23 is gradually lifted from the outside to the inside, which can facilitate the liquid to flow back to the position of the second bottom wall through hole 25B through the third bottom wall portion 23. Figures 11 to 14 As shown, when the geometric center point of the second bottom wall part 22 coincides with the geometric center point of the cover bottom wall 41H, the two sub-bottom wall third parts 23A can be symmetrical about the central axis of the cover bottom wall 41H, for example, the cover bottom wall 41H has a radially symmetrical structure.

[0221] During use, because the cover bottom wall 41H has a tapered structure that is wider at the bottom and narrower at the top, a significant pressure differential can be generated between the first bottom wall through-hole 25A, located above, and the second bottom wall through-hole 25B, located below. When bubbles (foam) initially form within the cooking cavity 61, the bubbles are some distance from both the first and second bottom wall through-holes 25A, 25B, so the first and second bottom wall through-holes 25A, 25B primarily serve to expel steam. However, as the number of bubbles within the cooking cavity 61 increases, the pressure and height differences between the first and second bottom wall through-holes 25A, 25B, as well as the relationship between their individual and combined areas, encourage gas to escape from the first bottom wall through-hole 25A along the tapered slope. Simultaneously, the bubbles preferentially enter the overflow prevention cavity 15 through the second bottom wall through-hole 25B, thereby achieving gas-liquid separation.

[0222] Furthermore, when the bubbles continue to increase and accumulate in the overflow prevention cavity 15, the bubbles will climb along the inclined surface of the third part 23 of the bottom wall to the position of the first bottom wall through hole 25A. Since the aperture of the first bottom wall through hole 25A is small and the gas is continuously discharged, the gas discharged from the first bottom wall through hole 25A at this time has a higher speed, which can break the bubbles accumulated near the first bottom wall through hole 25A. The broken bubbles turn into liquid and flow down the inclined surface, and flow back to the cooking cavity 61 from the second bottom wall through hole 25B, realizing internal steam bubble breaking and reflux.

[0223] In the axial cross section of the cover body 10 passing through the geometric center point M of the second bottom wall portion 22 and extending in the up-down direction, as shown in FIG. Figure 10 As shown, the third portion 23A of the sub-bottom wall can be a straight line. Alternatively, as shown Figure 11 and Figure 12 As shown, the third portion 23A of the sub-bottom wall can be a curve. Alternatively, as shown Figure 13 As shown, the third portion 23A of the sub-bottom wall can be a broken line consisting of straight lines. Alternatively, as shown Figure 14 As shown, the third portion 23A of the sub-bottom wall can be formed by a combination of straight lines and curves. It can be understood that in the axial section of the cover body 10 passing through the geometric center point M of the second bottom wall portion 22 and extending in the up-down direction, the shape of the third portion 23A of the sub-bottom wall is not limited to the above example.

[0224] like Figure 15 and 16 As shown, the third bottom wall portion 23 may be provided with at least one guide groove 45. The guide groove 45 is, for example, configured as a strip groove extending along the radial direction DR on the upper surface of the third bottom wall portion 23. Figure 15 As shown, when the geometric center point M of the second bottom wall portion 22 coincides with the geometric center point N of the bottom wall 41H of the cover plate, a plurality of guide grooves 45 can be arranged at equal intervals along the circumferential direction DC, or, as shown in FIG. Figure 16 As shown, when the geometric center point M of the second bottom wall portion 22 does not coincide with the geometric center point N of the cover plate bottom wall 41H, a plurality of guide grooves 45 of different lengths may be provided around the geometric center point M of the second bottom wall portion 22. The guide grooves 45 may extend from a position close to the first bottom wall through hole 25A to a position close to the second bottom wall through hole 25B, thereby facilitating the backflow of liquid to the second bottom wall through hole 25B.

[0225] The third bottom wall portion 23 is further provided with a sensor through-hole 26 for passing the top temperature sensor 16, thereby enabling the top temperature sensor 16 to detect the temperature inside the cooking cavity 61. Of course, the sensor through-hole 26 can also be used to pass other sensors of the lid 10, such as a pressure sensor, a humidity sensor, etc. The third bottom wall portion 23 can be provided with multiple sensor through-holes 26, each for passing a different sensor.

[0226] like Figures 9 to 16 As shown, the second bottom wall portion 22 is configured as an annular area. The bottom wall 20 also includes a first bottom wall portion 21, which is arranged on the inner side of the second bottom wall portion 22 along the radial direction DR. The edge of the first bottom wall portion 21 can be defined by the edge of the first bottom wall through hole 25A. The first bottom wall portion 21 and the third bottom wall portion 23 are respectively located on both sides of the second bottom wall portion 22. The first bottom wall portion 21 and the fourth bottom wall portion 24 are respectively located on both sides of the second bottom wall portion 22. The first bottom wall portion 21 and the fourth bottom wall portion 24 are respectively located on both sides of the third bottom wall portion 23. The first bottom wall portion 21 can be configured as a non-porous area. The exhaust component 30 is arranged above the first bottom wall portion 21. The exhaust component 30 is thereby connected to the top of the anti-overflow cavity 15. The first bottom wall portion 21 includes a platform area 21A configured as a flat plate (see Figure 10 ), the exhaust component 30 can be located directly above the platform area 21A, so that the second bottom wall portion 22 is closer to the exhaust component 30 than the fourth bottom wall portion 24. The first bottom wall through hole 25A can be located near the edge of the platform area 21A, so that steam can pass through the first bottom wall through hole 25A and then be discharged to the outside through the exhaust component 30.

[0227] Specifically, 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 platform area 21A is used as the distance between the edge of the first bottom wall through hole 25A and the edge of the platform area 21A. The range of the distance between the edge of the first bottom wall through hole 25A and the edge of the platform area 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 area 21A, the foam breaking position will be too close to the exhaust component 30, causing the foam to overflow from the exhaust component 30. If the first bottom wall through hole 25A is too far from the platform area 21A, the foam will move too little distance in the anti-overflow cavity 15, affecting the anti-overflow effect.

[0228] like Figure 17 and Figure 18 As shown, the exhaust component 30 includes an exhaust chamber 30A extending in the up-down direction, and the exhaust chamber 30A is configured to communicate with the outside. Figure 2 and Figure 3As shown, the exhaust component 30 is detachably mounted on the lining cover 11. The lining cover 11 includes a lining cover exhaust chamber 18. The cover body 10 also includes a face cover sealing ring 14, which is arranged at the end of the side wall of the lining cover exhaust chamber 18 and is used to seal the side wall of the lining cover exhaust chamber 18 and the face cover 13. A horizontal annular support rib 19 is provided in the lining cover exhaust chamber 18. The side wall 31 of the exhaust chamber 30A is constructed with an annular outer flange 39. One of the support rib 19 and the outer flange 39 has a certain degree of elasticity, so that the outer flange 39 can squeeze through the hole of the support rib 19 and overlap above the support rib 19. A exhaust hole is opened in the face cover 13 at a position corresponding to the lining cover exhaust chamber 18, so that the lining cover exhaust chamber 18 is connected to the outside world. The side wall 31 of the exhaust chamber 30A is provided with a plurality of exhaust holes 33. The plurality of exhaust holes 33 can be staggered along the axial direction (vertical direction) and circumferential direction of the exhaust chamber 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. Because the support ribs 19 divide the liner exhaust chamber 18 into two, the overflow prevention chamber 15 cannot directly communicate with the second exhaust hole 33B. Therefore, the overflow prevention chamber 15 is configured to communicate with the exhaust chamber 30A through the first exhaust hole 33A, and then communicate with the outside world through the second exhaust hole 33B and the liner exhaust chamber 18.

[0229] The steam exhaust chamber 30A is positioned above the first bottom wall portion 21, so that the second bottom wall portion 22 is closer to the steam exhaust hole 33 than the fourth bottom wall portion 24, and the first bottom wall hole 25A is closer to the steam exhaust hole 33 than the second bottom wall hole 25B. Thus, steam preferentially occupies the steam exhaust chamber 30A and its surrounding space, preventing foam from directly entering the steam exhaust chamber 30A. In the vertical projection of the cover body 10, at least some of the first bottom wall holes 25A are located between the second bottom wall hole 25B and the steam exhaust hole 33. In the vertical projection of the cover body 10, all of the first bottom wall holes 25A are located between the second bottom wall hole 25B and the steam exhaust hole 33. Thus, within the overflow prevention chamber 15, steam is located on the path that foam must take. When the foam is effectively destroyed, only steam can enter the steam exhaust chamber 30A through the steam exhaust hole 33 and then be discharged to the external environment. In this application, it is necessary to avoid or prevent foam from entering the exhaust chamber 30A as much as possible.

[0230] The steam exhaust chamber 30A is disposed above the first bottom wall portion 21, and at least one of the bottom wall 32 and the first bottom wall portion 21 of the steam exhaust chamber 30A is not provided with an opening to prevent bubbles from directly entering the steam exhaust chamber 30A upward from the overflow prevention cavity 15 and causing overflow. In the vertical projection of the cover body 10, the first bottom wall portion 21 includes the bottom wall 32 of the steam exhaust chamber 30A. In the vertical projection of the cover body 10, the platform area 21A of the first bottom wall portion 21 includes the bottom wall 32 of the steam exhaust chamber 30A. The ratio of the width of the platform area 21A to the width of the bottom wall 20 of the overflow prevention cavity 15 (i.e., the cover bottom wall 41H) is a third ratio, and the value range of the third ratio is [1 / 20, 1 / 5]. If the third ratio is too small, the foam bursting point will be too close to the steam exhaust component 30, causing the foam to overflow from the steam exhaust component 30. If the third ratio is too large, the foam will move too little distance in the overflow prevention cavity 15, affecting the overflow prevention effect.

[0231] like Figure 19 and Figure 20 As shown, when the bottom wall 32 of the exhaust chamber 30A is provided with a reflux hole 34, the first bottom wall portion 21 is not provided with a through hole. The reflux hole 34 is used to allow the liquid in the exhaust chamber 30A (for example, distilled water formed by steam condensation) to flow back into the anti-overflow cavity 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 bottom wall portion 21. 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 area 21A. If the outer diameter of the bottom wall 32 of the exhaust chamber 30A is too large, it will cause bubbles at the first bottom wall through hole 25A to overflow from the reflux hole 34 into the exhaust chamber 30A. In addition, 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 3 mm, which prevents the bubbles at the first bottom wall through hole 25A from squeezing into the gap between the bottom wall 32 of the exhaust chamber 30A and the platform area 21A, and directly overflowing from the reflux hole 34 at the bottom of the overflow prevention valve into the exhaust chamber 30A.

[0232] The height difference between the lower edge of the exhaust hole 33, specifically, the lower edge of the first exhaust hole 33A, and the bottom of the exhaust component 30, that is, the lower surface of the bottom wall 32 of the exhaust chamber 30A, is at least 5 mm, thereby preventing bubbles that have not yet broken from accumulating at the first bottom wall hole 25A and overflowing from the first exhaust hole 33A.

[0233] Of course, the bottom wall 32 of the exhaust chamber 30A may not have an opening. In this case, the first bottom wall portion 21 may be provided with a bottom wall through hole 25, such as a first bottom wall through hole 25A, so that the first bottom wall portion 21 merges into the second bottom wall portion 22. Therefore, in the present application, at least one of the bottom wall 32 and the first bottom wall portion 21 of the exhaust chamber 30A is provided with no opening. Alternatively, the opening of the bottom wall 32 of the exhaust chamber 30A and the bottom wall through hole are staggered along the radial direction DR of the cover body 10.

[0234] To ensure that steam can be discharged from the cover 10 smoothly through the exhaust component 30, the total area of ​​the exhaust holes 33, that is, the total area of ​​the first exhaust holes 33A and the second exhaust holes 33B, is not less than the total area of ​​the first bottom wall holes 25A.

[0235] Or, as Figures 21 to 23 As shown, the steam exhaust hole 33 may only include the first steam exhaust hole 33A. The first steam exhaust hole 33A is provided on the side wall 31 of the steam exhaust chamber 30A to facilitate steam from the overflow prevention cavity 15 into the steam exhaust chamber 30A. The height difference between the lower edge of the first steam exhaust hole 33A and the bottom of the steam exhaust component 30, that is, the lower surface of the bottom wall 32 of the steam exhaust chamber 30A, is at least 5 mm, thereby preventing bubbles that have not yet broken at the first bottom wall through hole 25A from overflowing from the first steam exhaust hole 33A. To ensure that steam can smoothly pass through the steam exhaust component 30 and discharge from the cover body 10, the total area of ​​the first steam exhaust hole 33A is not less than the total area of ​​the first bottom wall through hole 25A.

[0236] Exhaust holes 33 are provided on the sidewall 31 of the exhaust chamber 30A, providing a barrier to bubbles and preventing them from escaping. Gas can then be discharged through the exhaust holes 33. If excessive bubbles are present, first and second exhaust holes 33A, 33B can be staggered along the circumferential direction DC and vertical direction of the exhaust chamber 30A. This alternating exhaust path can further break up some of the bubbles. Finally, condensed water within the exhaust chamber 30A can be discharged through the reflux holes 34 provided on the bottom wall 32 of the exhaust chamber 30A.

[0237] Or, as Figure 24 As shown, in the second embodiment, the exhaust component 130 of the cover body 110 can be constructed as an integral part with the liner cover 11, which simplifies the design and reduces the cost. For parts not introduced in the second embodiment, please refer to the description of the first embodiment.

[0238] In such Figure 25 and Figure 26In the third embodiment shown, the removable lid 240 of the lid body 210 of the cooking utensil 200 differs from the removable lid 40 of the first embodiment. Specifically, the bottom wall 241H of the lid, i.e., the bottom wall 220 of the overflow prevention chamber 15, is constructed as a flat plate. In this case, the bottom wall 220 can also include a second bottom wall portion 22 provided with a first bottom wall through hole 25A and a fourth bottom wall portion 24 provided with a second bottom wall through hole 25B. The second bottom wall portion 22 is positioned closer to the exhaust component 30 than the fourth bottom wall portion 24. Compared to the first embodiment, the third embodiment makes the first bottom wall through hole 25A and the second bottom wall through hole 25B 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 between the exhaust component 30 and the overflow prevention chamber 15, and the partitioning of the bottom wall 220) remain unchanged. It can also be understood that the features of the first embodiment that are applicable to the third embodiment can also be applied to the third embodiment. For parts not introduced in the third embodiment, please refer to the description of the first embodiment.

[0239] exist Figures 27 to 34 In the fourth embodiment shown, the cover 310 of the cooking utensil is provided with an anti-overflow cavity 15 . Unlike the first three embodiments, the detachable cover 340 simultaneously provides the top wall, side walls and bottom wall 320 of the anti-overflow cavity 15 .

[0240] As shown in the figure, in the fourth embodiment of the present application, the removable cover 340 includes an upper cover plate 46 and a lower cover plate 341. The upper cover plate 46 is configured to be removably connected to the liner cover 11. The upper cover plate 46 forms the top wall of the anti-overflow cavity 15. The lower cover plate 341 is connected to the lower surface of the upper cover plate 46 and is configured to cover the cooking cavity opening 63. The lower cover plate 341 provides the side walls and bottom wall 320 of the anti-overflow cavity 15.

[0241] The upper cover plate 46 is provided with an upper cover plate steam exhaust hole 46C for exhausting steam. The steam exhaust component 30 is connected to the upper cover plate steam exhaust hole 46C. For example, at least a portion of the steam exhaust chamber 30A is disposed in the upper cover plate steam exhaust hole 46C, or the upper cover plate steam exhaust hole 46C is configured to communicate with the liner cover steam exhaust chamber 18. The removable cover 340 also includes a liner cover sealing ring 46A, which is mounted at the opening of the upper cover plate steam exhaust hole 46C. The liner cover sealing ring 46A can be made of an elastic material, for example, and is configured to seal against the bottom opening of the liner cover steam exhaust chamber 18.

[0242] The lower cover 341 includes a bottom wall 341H and side walls 41A. The bottom wall 341H forms the bottom wall 320 of the overflow prevention cavity 15. The bottom wall 341H is provided with a bottom wall through-hole 25, thereby connecting the cooking cavity 61 and the overflow prevention cavity 15. The side walls 41A extend upward along the outer peripheral edge of the bottom wall 341H to contact the lower surface of the upper cover 46, thereby forming the side walls of the overflow prevention cavity 15.

[0243] 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, extends through the upper cover plate 46. The upper end of the upper cover plate connector 51 is removably connected to the lower end of the connector seat 53. The cover plate bottom wall 341H is provided with a lower cover plate connector 52. The upper cover plate connector 51 is removably connected to the lower cover plate connector 52, thereby allowing the lower cover plate 341 to be removably connected to the upper cover plate 46. The overflow prevention cavity 15 is 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 requires minimal modification, which helps reduce costs.

[0244] Specifically, if 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 provided on the lower surface of the upper cover plate 46. The second connecting portion 51B is provided 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 cover plate bottom wall 341H, which uses elastic material as the groove wall, for accommodating the second connecting portion 51B. The inner diameter of the notch of the receiving groove is smaller than the outer diameter of the second connecting portion 51B, so that the second connecting portion 51B can be confined in the receiving groove. The second connecting portion 51B includes a portion of a cone with the tip pointing downward, which facilitates 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 is provided with a connecting hole 41E, and the outer peripheral surface of the groove wall of the accommodating groove of the lower cover connecting piece 52 is provided with a connecting groove 52A extending along the circumferential direction, which is used to accommodate the bottom wall 341H of the cover located around the opening of the connecting hole 41E, so that the accommodating groove can be detachably connected to the bottom wall 341H of the cover.

[0245] 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 parameters of the cooking space through the sensor through holes.

[0246] The removable lid 340 also includes a pot mouth sealing ring 43 and a removable lid seat 47. The pot mouth sealing ring 43 is disposed on the outer periphery of the lower cover plate 341. The pot mouth sealing ring 43 is made of, for example, an elastic material and is configured to seal against the cooking cavity opening 63. The removable lid seat 47 is configured to be removably attached to the lining cover 11. Both the upper cover plate 46 and the pot mouth sealing ring 43 are removably connected to the removable lid seat 47, thereby removably connecting the lining cover 11.

[0247] like Figure 32 As shown, the removable lid seat 47 includes an annular seat body 47A, with at least a portion of the lid sidewall 41A and at least a portion of the pot mouth sealing ring 43 being surrounded by the inner circumferential surface of the seat body 47A. The pot mouth sealing ring 43 includes a pot mouth sealing portion 43A and an extension portion 43B. The pot mouth sealing portion 43A is used to seal against the cooking cavity opening 63. The extension portion 43B extends upward from the upper end of the pot mouth 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 lid sidewall 41A in the radial direction DR, that is, the extension portion 43B is located between the seat body 47A and the lid sidewall 41A in the radial direction DR.

[0248] The pot mouth sealing ring 43 also includes a first retaining portion 43C extending outwardly in the radial direction DR from the upper end of the extension portion 43B. The lower surface of the first retaining portion 43C is connected to the upper surface of the seat body 47A. The upper surface of the pot mouth sealing portion 43A can abut the lower surface of the seat body 47A, further retaining the pot mouth sealing ring 43 relative to the removable lid seat 47 in the axial direction DA.

[0249] The pot mouth sealing ring 43 also includes a second stopper 43D, which protrudes from the lower surface of the first stopper 43C. A stopper groove 47C is provided on the upper surface of the seat body 47A, which abuts the first stopper 43C. This groove 47C is configured as a groove that mates with the second stopper 43D and accommodates the second stopper 43D. The second stopper 43D abuts the stopper groove 47C, thereby securing the pot mouth sealing ring 43 relative to the removable lid seat 47 in the radial direction DR.

[0250] The lower surface of the outer peripheral region 46E of the upper cover 46 abuts the upper surface of the base body 47A. A clip 46B is provided on the outer edge of the outer peripheral region 46E of the upper cover 46, allowing the upper cover 46 to be removably connected to the removable cover base 47 via the clip 46B. For example, the clip 46B can engage with a retaining groove 47C. The first retaining portion 43C of the pot mouth sealing ring 43 is located vertically between the outer peripheral region 46E of the upper cover 46 and the base body 47A, thereby clamping the pot mouth sealing ring 43 between the upper cover 46 and the removable cover base 47.

[0251] The pot mouth sealing ring 43 also includes a first support portion 43E, which protrudes from the upper surface of the first limiting portion 43C and is configured to abut the lower surface of the outer peripheral region 46E of the upper cover 46. The upper surface of the first support portion 43E can be, for example, a circular arc surface. The first support portion 43E uses a small amount of material to ensure sealing contact between the pot mouth sealing ring 43 and the upper cover 46, thereby limiting the reach of foam, gas, etc. generated during cooking. For example, the foam, gas, etc. do not affect the removable cover 47, which helps to ensure the service life of the removable cover 47.

[0252] The removable cover 340 also includes a cover plate sealing ring 48, which is disposed at the upper end of the cover plate sidewall 41A. The cover plate sealing ring 48 can be made of, for example, an elastic material and is configured to seal against the lower surface of the upper cover plate 46. A flange 41J protruding outward in the radial direction DR is disposed at the upper end of the cover plate sidewall 41A. The cover plate sealing ring 48 is fitted over the flange 41J in the radial direction DR. The upper surface of the cover plate sealing ring 48 contacts the lower surface of the upper cover plate 46, thereby forming a seal between the upper cover plate 46 and the lower cover plate 41, thereby preventing leakage from the sidewalls of the overflow prevention chamber 15.

[0253] The pot mouth sealing ring 43 is further provided with a second support portion 43F, which is configured as a rib protruding inwardly in the radial direction DR on the inner circumferential surface of the pot mouth sealing ring 43. The upper surface of the second support portion 43F abuts the lower surface of the cover plate sealing ring 48, thereby supporting the flange 41J of the lower cover plate 341. This supports the lower cover plate 341 at the central lower cover plate connector 52 and at the outer periphery, further stabilizing the connection between the lower cover plate 341 and the upper cover plate 46.

[0254] like Figure 33 and Figure 34 As shown, the upper cover plate 46 is provided with a reinforcement groove 46D. The reinforcement groove 46D may be configured as a groove extending along the circumferential direction DC, so as to further enhance the structural strength of the upper cover plate 46 .

[0255] In the fourth embodiment of the present application, the structure of the cover bottom wall 341H is somewhat different from the cover bottom wall 41H in the first embodiment. For example, the lower cover 341 is provided with a connection hole 41E for detachably connecting to the lower cover connector 52. For another example, the lower cover 341 is not directly mounted on the detachable cover seat 47.

[0256] In the fourth embodiment, the bottom wall 320 may also include a second bottom wall portion 22 having a first bottom wall through hole 25A and a fourth bottom wall portion 24 having a second bottom wall through hole 25B. The second bottom wall portion 22 is located closer to the exhaust component 30 than the fourth bottom wall portion 24. 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 structure of the bottom wall 320, the shape of the bottom wall 320, and the connection between the exhaust component 30 and the overflow prevention chamber 15 may all be the same as those in the first embodiment. It can also be understood that the features of the first embodiment that apply to the fourth embodiment can also be applied to the fourth embodiment.

[0257] For parts not introduced in the fourth embodiment, refer to the description of the first embodiment.

[0258] The processes and steps described in all the preferred embodiments described above are merely examples. Unless adverse effects occur, various processing operations may be performed in a different order from the above process. The order of the steps in the above process may also be increased, combined, or deleted according to actual needs.

[0259] In understanding the scope of this application, the term "comprise" and its derivatives as used herein are intended to be open terms that specify the presence of recited features, elements, components, groups, wholes, and / or steps, but do not exclude the presence of other unrecorded features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "include," "have," and their derivatives.

[0260] As used herein, the terms "attached" or "attached" include: configurations where an element is directly secured to another element by securing it directly to the other element; configurations where an element is indirectly secured to the other element by securing it to an intermediate member that is in turn secured to the other element; and configurations where one element is integral with the other, i.e., one element is substantially a part of the other. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "secure," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent an amount of deviation that would modify the term such that the end result would not be significantly changed.

[0261] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the art of this application. The terms used herein are merely for describing specific implementation purposes and are not intended to limit this application. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or is otherwise indicated.

[0262] The present application has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present application to the described embodiments. In addition, those skilled in the art will understand that the present application is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present application, all of which fall within the scope of protection claimed in the present application.

Claims

1. A cover for a cooking utensil, the cooking utensil comprising a pot body, the pot body comprising a cooking cavity for holding food, the cooking cavity having a cooking cavity opening for taking food in and out, characterized in that: The cover is used to cover the pot body, and the cover includes: an anti-overflow cavity, wherein the bottom wall of the anti-overflow cavity is used to cover the cooking cavity opening when the lid body covers the pot body, and the bottom wall is provided with at least one bottom wall through hole for connecting the anti-overflow cavity with the cooking cavity; and The exhaust component includes an exhaust cavity extending in the up-down direction, the exhaust cavity is configured to communicate with the outside world, and the exhaust cavity is provided with an exhaust through hole communicating with the overflow prevention cavity, so that the overflow prevention cavity is configured to communicate with the outside world through the exhaust component. The exhaust component is arranged above the bottom wall. In the projection of the cover body along the up and down directions, the bottom wall of the anti-overflow cavity has a first bottom wall portion, and the first bottom wall portion includes the bottom wall of the exhaust cavity. At least one of the bottom wall of the exhaust cavity and the first bottom wall portion is not provided with an opening.

2. The cover according to claim 1, wherein: The exhaust through hole is arranged on the side wall of the exhaust cavity.

3. The cover according to claim 2, wherein: The height difference between the lower edge of the exhaust hole and the bottom of the exhaust component is at least 5 mm.

4. The cover according to claim 3, wherein: The exhaust through hole includes a first exhaust through hole and a second exhaust through hole. The first exhaust through hole and the second exhaust through hole are staggered on the side wall of the exhaust cavity along the circumferential direction and the up-down direction of the exhaust cavity.

5. The cover according to claim 1, wherein: The cover body includes a lining cover, and the exhaust component is detachably connected to the lining cover, or the exhaust component is integrally formed with the lining cover.

6. The cover according to claim 1, wherein: The first portion of the bottom wall includes a platform area, and the steam exhaust component is arranged above the platform area.

7. The cover according to claim 6, wherein: A ratio of the width of the platform area to the width of the bottom wall of the overflow prevention cavity is a third ratio, and a value range of the third ratio is [1 / 20, 1 / 5].

8. The cover according to claim 6, wherein: The bottom wall of the exhaust cavity is provided with a reflux hole, and the first portion of the bottom wall is not provided with a through hole.

9. The cover according to claim 8, wherein: The height difference between the lower surface of the bottom wall of the exhaust cavity and the platform area is not greater than 3 mm; and / or The outer diameter of the bottom wall of the exhaust cavity is not greater than the width of the platform area.

10. The cover according to claim 1, wherein: The bottom wall further includes a second bottom wall portion and a fourth bottom wall portion, wherein the first bottom wall portion and the fourth bottom wall portion are located on opposite sides of the second bottom wall portion, respectively. The bottom wall through hole includes a first bottom wall through hole and a second bottom wall through hole, wherein the first bottom wall through hole is arranged in the second part of the bottom wall, the second bottom wall through hole is arranged in the fourth part of the bottom wall, and the first bottom wall through hole is smaller than the second bottom wall through hole.

11. The cover according to claim 10, wherein: The total area of ​​the exhaust holes is not less than the total area of ​​the first bottom wall holes.

12. The cover according to claim 10, wherein: The second portion of the bottom wall is higher than the fourth portion of the bottom wall.

13. The cover according to claim 12, wherein: A 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.

14. The cover according to claim 12, wherein: The second bottom wall portion and the fourth bottom wall portion are arranged in a radial direction. The fourth bottom wall portion is located at an outer periphery of the second bottom wall portion, and the first bottom wall portion is located at an inner periphery of the second bottom wall portion.

15. The cover according to claim 14, wherein: The bottom wall further includes a third bottom wall portion, which is an annular area located between the first bottom wall through hole and the second bottom wall through hole along the radial direction. In a cross-section of the cover body passing through the geometric center point of the second portion of the bottom wall and extending in the up-down direction, the third portion of the bottom wall includes two sub-bottom wall third portions respectively located on both sides of the geometric center point of the second portion of the bottom wall, wherein any one of the sub-bottom wall third portions has an arbitrary first position point and a second position point, wherein when the first position point is closer to the second portion of the bottom wall than the second position point, the first position point is not lower than the second position point.

16. The cover according to claim 10, wherein: The area of ​​each of the first bottom wall through holes is in the range of [1.77mm 2 , 20mm 2 ]; and or The area of ​​each of the second bottom wall through holes is in the range of [20mm 2 , 300mm 2 ].

17. The cover according to claim 16, wherein: A 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 a value range of the second ratio is [2, 5].

18. The cover according to claim 10, 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.

19. The cover according to any one of claims 1 to 18, characterized in that: The cover body further includes a pot mouth sealing ring, which is arranged on the outer periphery of the bottom wall and is used for sealingly contacting the cooking cavity opening.

20. A cooking utensil, characterized in that: include: A pot body, the pot body comprising a cooking cavity for holding food, the cooking cavity having a cooking cavity opening for taking food in and out; and The cover according to any one of claims 1 to 19, wherein the cover is used to cover the pot body.

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