Cooking utensil

Abstract

The cooking utensil comprises a pot body and a cover 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, when the cooker body is covered with the cover body, the bottom wall of the anti-overflow cavity is used for covering the opening of the cooking cavity, and the anti-overflow cavity is constructed to be communicated with the outside. The bottom wall comprises a bottom wall second part, a bottom wall third part and a bottom wall fourth part which are sequentially arranged in the first direction, the bottom wall second part is provided with at least one first bottom wall through hole, the bottom wall fourth part is provided with at least one second bottom wall through hole, and the first bottom wall through hole is smaller than the second bottom wall through hole. The third bottom wall portion comprises at least one functional groove extending in the second direction, the functional groove protrudes upwards or sinks downwards, and the second direction is different from the first direction. Through the arrangement of the functional groove, the path between the first bottom wall through hole and the second bottom wall through hole can be prolonged, and the strength of the bottom wall is improved while overflow is avoided.

Description

Technical Field

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

[0002] There are generally two types of overflow prevention structures commonly used in existing cooking utensils: one that prevents overflow by collecting condensation in a cavity channel, and the other that stores foam in the cavity channel and breaks it to achieve overflow prevention. However, these two overflow prevention structures are less effective in breaking bubbles during use, and foam can easily accumulate in the cavity channel, further causing it to overflow from the cooking utensils, resulting in a poor user experience.

[0003] Therefore, a cooking appliance is needed to at least partially solve the above problems. Utility Model Content

[0004] 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.

[0005] To at least partially solve the above problems, the present application provides a cooking appliance, comprising:

[0006] 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

[0007] A cover body, used to cover the pot body, the cover body comprising:

[0008] An anti-overflow cavity, when the cover body covers the pot body, the bottom wall of the anti-overflow cavity is used to cover the cooking cavity opening, and the anti-overflow cavity is configured to communicate with the outside world, and the bottom wall includes a second bottom wall portion, a third bottom wall portion and a fourth bottom wall portion arranged in sequence along a first direction, wherein the second bottom wall portion is provided with at least one first bottom wall through hole, and the fourth bottom wall portion is provided with at least one second bottom wall through hole, the first bottom wall through hole is smaller than the second bottom wall through hole, and the third bottom wall portion includes at least one functional groove extending along a second direction, the functional groove is convex upward or concave downward, wherein the second direction is different from the first direction.

[0009] According to the present application, by arranging an overflow prevention cavity on the cover body, the overflow energy can be absorbed and the overflowed bubbles can be stored, thereby achieving overflow prevention. The first bottom wall through hole and the second bottom wall through hole are different in size. The foam is more obstructed at the first bottom wall through hole and tends to enter the overflow prevention cavity from the larger second bottom wall through hole, while the steam enters the overflow prevention cavity from the first bottom wall through hole. Therefore, the bubbles (foam) and steam enter the overflow prevention cavity through different bottom wall through holes respectively, realizing gas-liquid separation, so that the steam can break the foam in the overflow prevention cavity and improve the overflow prevention effect. By arranging a functional groove extending along the second direction on the third part of the bottom wall between the first bottom wall through hole and the second bottom wall through hole, the surface area of the bottom wall of the overflow prevention cavity can be increased while improving the structural strength of the bottom wall, thereby changing the pressure and friction inside the overflow prevention cavity, achieving the effects of pressure breaking and friction breaking, effectively eliminating the foam in the overflow prevention cavity and improving the overflow prevention effect. In addition, the path between the first bottom wall through hole and the second bottom wall through hole can be extended, thereby increasing the movement distance of the foam and increasing the kinetic energy loss of the foam moving from the first bottom wall through hole to the second bottom wall through hole, thereby further avoiding overflow.

[0010] Optionally, the ratio of the volume of the anti-overflow cavity to the volume of the cooking cavity is a first ratio, and the value range of the first ratio is [1 / 40, 4 / 5].

[0011] According to the present application, the size of the overflow prevention cavity matches the size of the inner pot to avoid a poor overflow prevention effect due to a too small volume ratio between the two, or an excessively high ratio resulting in excessively high material costs.

[0012] Optionally, the pot body includes:

[0013] a receiving cavity; and

[0014] The inner pot body can be removed and placed in the accommodating cavity for holding food. The inner space of the inner pot body forms the cooking cavity, and the volume of the inner pot body is the volume of the cooking cavity.

[0015] According to the present application, the cooking container can be removed for easy cleaning. The volume of the inner pot is the volume of the cooking cavity, which facilitates ensuring the relationship between the volume of the anti-overflow cavity and the volume of the cooking cavity.

[0016] Optionally, the cover further includes a steam exhaust hole communicating with both the outside world and the anti-overflow cavity, so that the anti-overflow cavity communicates with the outside world through the steam exhaust hole.

[0017] The first bottom wall through hole is closer to the exhaust through hole than the second bottom wall through hole.

[0018] According to the present application, the first bottom wall through-hole is closer to the steam exhaust through-hole than the second bottom wall through-hole, so that the space around the steam exhaust through-hole is preferentially occupied by steam. As a result, foam will come into contact with the steam as it moves toward the steam exhaust through-hole, causing the foam to be broken by the steam, thereby preventing overflow. Furthermore, this also facilitates steam to be discharged from the cover body through the first bottom wall through-hole and the steam exhaust through-hole.

[0019] Optionally, in a projection of the cooking utensil along the up-down direction, at least part of the first bottom wall through hole is located between the second bottom wall through hole and the steam exhaust through hole.

[0020] According to the present application, at least part of the first bottom wall through hole is located between the second bottom wall through hole and the exhaust through hole, ensuring that the foam will come into contact with the steam when moving toward the exhaust through hole, so that the gas discharged from the first bottom wall through hole will accumulate from the second bottom wall through hole to the bubbles (foam) near the first bottom wall through hole and break.

[0021] Optionally, the cover further includes a steam exhaust component, and the steam exhaust component is configured to communicate with the outside world.

[0022] The steam exhaust component is provided with the steam exhaust through hole, so that the anti-overflow cavity is configured to communicate with the outside through the steam exhaust component.

[0023] According to the present application, by arranging the exhaust holes in the exhaust component, the flexibility of the exhaust holes design can be improved.

[0024] Optionally, the exhaust component is connected to the top of the anti-overflow cavity, and the exhaust component includes an exhaust cavity extending in the up-down direction and communicating with the outside world, and the exhaust through hole is provided on the side wall of the exhaust cavity.

[0025] According to the present application, at least part of the first bottom wall through hole is located between the second bottom wall through hole and the exhaust through hole, ensuring that the foam will come into contact with the steam when moving toward the exhaust through hole, so that the gas discharged from the first bottom wall through hole will accumulate from the second bottom wall through hole to the bubbles (foam) near the first bottom wall through hole and break.

[0026] Optionally, the bottom wall further includes a first bottom wall portion, the first bottom wall portion and the fourth bottom wall portion are respectively located on opposite sides of the second bottom wall portion, and the exhaust chamber is arranged above the first bottom wall portion.

[0027] According to the present application, the steam exhaust chamber is located above the first bottom wall portion, facilitating steam entry into the steam exhaust chamber from the first bottom wall through-hole. The first bottom wall portion and the fourth bottom wall portion are located on opposite sides of the second bottom wall portion, respectively, so that foam entering from the second bottom wall through-hole contacts the steam as it moves toward the steam exhaust chamber, facilitating steam bubble breaking.

[0028] Optionally, at least one of the bottom wall of the exhaust cavity and the first portion of the bottom wall is not provided with an opening.

[0029] According to the present application, the bottom wall of the exhaust chamber and the first portion of the bottom wall are not provided with openings at the same time, so as to prevent bubbles (foam) from directly entering the exhaust chamber from the openings of the bottom wall of the exhaust chamber and causing overflow.

[0030] 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.

[0031] 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 in the first part of the bottom wall to prevent bubbles from directly entering the exhaust chamber from the reflux hole or blocking the reflux hole.

[0032] Optionally, the first portion of the bottom wall includes a platform area, and the exhaust cavity is arranged above the platform area.

[0033] 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.

[0034] 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.

[0035] Optionally, the height difference between the lower edge of the exhaust hole and the bottom of the exhaust component is at least 5 mm.

[0036] According to the present application, there is a certain height difference between the lower edge of the exhaust hole and the bottom of the exhaust component, so as to prevent bubbles (foam) that have not yet broken in time at the first bottom wall hole from overflowing from the exhaust hole.

[0037] Optionally, the total area of the exhaust holes is not less than the total area of the first bottom wall holes.

[0038] 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.

[0039] Optionally, the second portion of the bottom wall is higher than the fourth portion of the bottom wall.

[0040] According to the present application, the first bottom wall through hole is higher than the second bottom wall through hole, so that the first bottom wall through hole is less likely to be blocked by foam, which is conducive to allowing steam to enter the anti-overflow cavity through the first bottom wall through hole to achieve gas-liquid separation.

[0041] Optionally, the height difference between the lowest point of the first bottom wall through hole and the highest point of the second bottom wall through hole is greater than or equal to 3 mm; and / or

[0042] The fourth portion of the bottom wall is located at the lowest position of the bottom wall.

[0043] According to the present application, a certain height difference is provided between the first bottom wall through-hole and the second bottom wall through-hole to ensure that the foam does not contact the first bottom wall through-hole, thereby avoiding affecting the overflow prevention effect. The second bottom wall through-hole is arranged at the lowest position of the bottom wall to ensure the maximum height difference between the first bottom wall through-hole and the second bottom wall through-hole.

[0044] Optionally, the area of each of the first bottom wall through holes is in the range of [1.77mm 2 , 20mm 2 ]; and / or

[0045] The area of each of the second bottom wall through holes is in the range of [20mm 2 , 300mm 2 ].

[0046] 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 the bubbles are discharged from the first bottom wall through hole and overflow the pot, and at the same time, the air flow rate at the first bottom wall through hole is increased to facilitate breaking through the bubbles in the anti-overflow cavity.

[0047] 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].

[0048] 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.

[0049] Optionally, the total area of the first bottom wall through holes is in the range of [60mm 2 , 200mm 2 ]; and / or

[0050] The total area of the second bottom wall through hole is in the range of [100mm 2 , 1000mm 2 ].

[0051] According to the present application, by limiting the total area of the first bottom wall through hole and the second bottom wall through hole, the ability of the overflow prevention cavity to receive steam and foam can be balanced, thereby achieving a better overflow prevention effect.

[0052] Optionally, the number of the first bottom wall through holes is 10 to 64, and / or

[0053] The number of the second bottom wall through holes is 5 to 30.

[0054] According to the present application, by limiting the number of the first bottom wall through holes and the second bottom wall through holes, the ability of the overflow prevention cavity to receive steam and foam can be balanced, thereby achieving a better overflow prevention effect.

[0055] Optionally, the third portion of the bottom wall comprises a wavy structure, wherein the wavy structure comprises alternating upwardly convex wave crests and downwardly concave wave troughs, wherein the wave crests and the wave troughs form the functional groove; and / or

[0056] The second direction is perpendicular to the first direction.

[0057] According to the present application, the third portion of the bottom wall is constructed in a wavy structure. By using bidirectional concave and convex structures, the number of functional slots can be increased and easily implemented. The second direction is perpendicular to the first direction, so that the path between the first bottom wall through-hole and the second bottom wall through-hole can be extended as much as possible by providing the functional slots.

[0058] Optionally, the width of the functional groove is in the range of [1 mm, 20 mm], and / or the number of the functional grooves is 1 to 20.

[0059] According to the present application, the width and specific number of the functional grooves can be adaptively set according to the requirements for structural strength and anti-overflow performance.

[0060] Optionally, the first direction is the radial direction of the bottom wall, the second direction is the circumferential direction of the bottom wall, and the second portion of the bottom wall, the third portion of the bottom wall and the fourth portion of the bottom wall are arranged in sequence from inside to outside along the radial direction.

[0061] According to the present application, the second, third, and fourth bottom wall portions are arranged radially to accommodate the shape of the cooking cavity. The functional groove extends circumferentially, thereby extending the path between the first and second bottom wall through-holes in all directions.

[0062] Optionally, the fourth portion of the bottom wall is an annular area with the geometric center of the bottom wall as the center of the circle.

[0063] According to the present application, the fourth portion of the bottom wall takes the geometric center point of the bottom wall as the center of the circle, so as to facilitate the bubbles to enter the anti-overflow cavity evenly.

[0064] Optionally, the fourth portion of the bottom wall is provided with a plurality of the second bottom wall through holes, and the second bottom wall through holes are distributed at equal intervals along the circumferential direction of the bottom wall.

[0065] According to the present application, a plurality of second bottom wall through holes are evenly arranged along the circumferential direction of the bottom wall, which further facilitates the uniform entry of bubbles into the anti-overflow cavity.

[0066] Optionally, the geometric center of the second portion of the bottom wall overlaps with the geometric center of the bottom wall, and the functional groove is constructed as an annular groove with the geometric center of the bottom wall as the center of the circle.

[0067] According to the present application, when the geometric center of the second part of the bottom wall overlaps with the geometric center of the bottom wall, the functional groove is constructed as a circular groove with the geometric center of the bottom wall as the center of the circle, so that the strength of the bottom wall can be uniformly improved, and the path between the first bottom wall through hole and the second bottom wall through hole can be effectively extended in all directions.

[0068] Optionally, the geometric center of the second part of the bottom wall does not overlap with the geometric center of the bottom wall, the functional groove is constructed as an arc groove with the geometric center of the bottom wall as the center, and the second part of the bottom wall is located between the two ends of the arc groove along the circumferential direction of the bottom wall.

[0069] According to the present application, the geometric center point of the second bottom wall portion is offset from the geometric center point of the bottom wall, making it easier to adjust the position of the second bottom wall portion on the bottom wall according to the specific structure of the lid (for example, the position of the steam valve), thereby achieving a better overflow prevention effect. The shape of the functional groove is adaptively adjusted according to the position of the second bottom wall portion to ensure the overflow prevention effect.

[0070] Optionally, the geometric center of the second part of the bottom wall does not overlap with the geometric center of the bottom wall, and the functional groove is constructed as an annular groove, the center of which is located on the line connecting the geometric center of the second part of the bottom wall and the geometric center of the bottom wall.

[0071] According to the present application, the geometric center point of the second bottom wall portion is offset from the geometric center point of the bottom wall, making it easier to adjust the position of the second bottom wall portion on the bottom wall according to the specific structure of the lid (for example, the position of the steam valve), thereby achieving a better overflow prevention effect. The position of the functional groove can be adaptively adjusted according to the position of the second bottom wall portion to ensure the overflow prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] 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.

[0073] In the attached figure:

[0074] Figure 1 is a perspective schematic diagram of a cooking appliance according to a specific embodiment of the present application;

[0075] Figure 2A 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;

[0076] Figure 3 for Figure 2 A side cross-sectional schematic diagram of the cover body;

[0077] Figure 4 for Figure 3 A schematic top view of the cover plate in FIG.

[0078] Figure 5 for Figure 4 A schematic side view of the cover plate in FIG.

[0079] Figure 6 for Figure 3 A schematic top view of a first variant example of the cover plate;

[0080] Figure 7 for Figure 6 A schematic side view of the cover plate in FIG.

[0081] Figure 8 for Figure 3 A schematic top view of a second variant example of the cover plate;

[0082] Figure 9 for Figure 8 A schematic side view of the cover plate in FIG.

[0083] Figure 10 for Figure 2 A three-dimensional schematic diagram of the exhaust components;

[0084] Figure 11 for Figure 2 A side cross-sectional schematic diagram of the exhaust component in FIG.

[0085] Figure 12 for Figure 2 A schematic top view of the exhaust component in FIG.

[0086] Figure 13 for Figure 2 A bottom view schematic diagram of the exhaust component in FIG.

[0087] Figure 14 for Figure 2 A three-dimensional schematic diagram of a modified example of the exhaust component;

[0088] Figure 15 for Figure 14 A schematic front cross-sectional view of the exhaust component in FIG.

[0089] Figure 16 for Figure 14 Another three-dimensional schematic diagram of the exhaust component in FIG.

[0090] Figure 17 It is a side cross-sectional schematic diagram of a cover of a cooking utensil according to a second embodiment of the present application.

[0091] Description of reference numerals:

[0092] 10 / 110: Cover

[0093] 11: Lining cover

[0094] 12: Partition

[0095] 13: Face cover

[0096] 15: Anti-overflow cavity

[0097] 16: Top temperature sensor

[0098] 18: Lining cover exhaust cavity

[0099] 19: Support ribs

[0100] 20: Bottom wall of the overflow prevention cavity

[0101] 21: Bottom wall part 1

[0102] 21A: Platform area

[0103] 22: Bottom wall part 2

[0104] 23: The third part of the bottom wall

[0105] 24: Bottom wall part 4

[0106] 25: Bottom wall through hole

[0107] 25A: First bottom wall through hole

[0108] 25B: Second bottom wall through hole

[0109] 26: Sensor through hole

[0110] 30 / 130: Exhaust parts

[0111] 30A: exhaust chamber

[0112] 31: Side wall of the exhaust chamber

[0113] 32: Bottom wall of the exhaust chamber

[0114] 33: Exhaust hole

[0115] 33A: First exhaust hole

[0116] 33B: Second exhaust hole

[0117] 34: Reflux hole

[0118] 39: Outer flange

[0119] 40: Removable cover

[0120] 41: Cover

[0121] 41A: Cover side wall

[0122] 41H: bottom wall of cover

[0123] 42: First sealing ring

[0124] 43: Pot mouth sealing ring

[0125] 49: Function slot

[0126] 49A: Crest

[0127] 49B: trough

[0128] 60: Claypot

[0129] 61: Cooking Chamber

[0130] 63: Pot opening / cooking cavity opening

[0131] 64: Pot

[0132] 100: Cooking utensils

[0133] DA: Axial direction

[0134] DC: Circumferential direction

[0135] DR: radial direction DETAILED DESCRIPTION

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] Unless otherwise stated, numerical ranges herein include not only the entire range between its two endpoints but also the several sub-ranges contained therein.

[0142] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0143] like Figure 1 As 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] like Figure 2 and Figure 3 As 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 used to be detachably connected to the lining cover 11 and cover the cooking cavity opening 63. An anti-overflow cavity 15 is formed between the removable cover 40 and the lining cover 11.

[0154] The removable cover 40 includes a cover plate 41, which is detachably connected to the liner cover 11, forming the lower surface of the cover body 10 and covering 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.

[0155] 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 may be made of 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.

[0156] like Figure 2 and Figure 3As shown, the removable lid 40 further includes a pot mouth sealing ring 43 and a first sealing ring 42. The pot mouth sealing ring 43 is disposed on the periphery of the cover plate 41 and extends downward. The pot mouth sealing ring 43 is made, for example, of an elastic material and is configured to seal against the cooking cavity opening 63, thereby forming a cooking space between the lid body 10 and the cooking cavity 61. The first sealing ring 42 is disposed, for example, on the upper surface of the cover plate 41 and is configured to seal against the liner cover 11, thereby sealing the sidewalls of the overflow prevention cavity 15 and preventing leakage.

[0157] like Figures 4 to 9 As shown, 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.

[0158] 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 is relatively large, 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, liquid can return to the cooking chamber 61 through the bottom wall through-holes 25.

[0159] 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 4 and Figure 5 As shown, the bottom wall 20 of the overflow prevention cavity 15 includes two different areas, the second bottom wall part 22 and the fourth bottom wall part 24. The first bottom wall through hole 25A is arranged in the second bottom wall part 22, and the second bottom wall through hole 25B is arranged in the fourth bottom wall part 24, thereby realizing the centralized arrangement of multiple first bottom wall through holes 25A.

[0160] like Figure 5As 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. This prevents boiling foam from blocking the first bottom wall through-hole 25A, reducing resistance to steam passing through the first bottom wall through-hole 25A and thus achieving better gas-liquid separation. Specifically, the height difference between the lowest point of the first bottom wall through-hole 25A and the highest point of the second bottom wall through-hole 25B can be greater than or equal to 3 mm. The second bottom wall through-hole 25B can be located at the lowest point of the cover plate bottom wall 41H.

[0161] For example, Figure 5 As shown, the bottom wall 41H of the cover plate can be constructed as a conical structure that is wider at the bottom and narrower at the top, with the second bottom wall portion 22 and the fourth bottom wall portion 24 arranged in the radial direction, and the fourth bottom wall portion 24 located on the periphery of the second bottom wall portion 22. When the bottom wall 41H of the cover plate is constructed as a structure similar to a cone that is wider at the bottom and narrower at the top (convex on the top), according to Bernoulli's principle, the pressure at the fourth bottom wall portion 24 is greater than the pressure at the second bottom wall portion 22, thereby further promoting the discharge of gas (water vapor) from the first bottom wall through hole 25A. The line connecting the first bottom wall through hole 25A and the second bottom wall through hole 25B has a first angle with the horizontal plane. In order to facilitate the backflow of liquid from the second bottom wall through hole 25B, the first angle is greater than or equal to 5°. The foam in the anti-overflow cavity 15 will cool down as it moves, which is conducive to bubble breaking. In order to allow the bubbles entering from the second bottom wall through hole 25B to have sufficient distance to move, the distance between the edge of the first bottom wall through hole 25A and the edge of the second bottom wall through hole 25B is not less than 10 mm, that is, the minimum distance between a point on the edge of the first bottom wall through hole 25A and a point on the edge of the second bottom wall through hole 25B is not less than 10 mm.

[0162] In order to make the first bottom wall through hole 25A better block the foam in the cooking cavity 61 and increase the steam flow rate at the first bottom wall through hole 25A (to facilitate breaking the bubbles in the anti-overflow cavity 15), the area of each first bottom wall through hole 25A is in the range of [1.77mm 2 , 20mm 2 ], for example, it can be 1.77mm 2 , 3mm 2 or 20mm 2 For example, when the first bottom wall through hole 25A is circular, its diameter can be 1.5-2.5 mm. In order to make the second bottom wall through hole 25B more suitable for foam to pass through, the area of each second bottom wall through hole 25B is in the range of [20 mm 2 , 300mm 2 ], for example, it can be 20mm 2 , 150mm 2 or 300mm 2For example, when the second bottom wall through hole 25B is circular, its diameter may be 6-10 mm.

[0163] In order to adapt the receiving capacity of the overflow prevention 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 overflow prevention cavity 15, achieving a better overflow prevention effect. Specifically, the total area of the first bottom wall through holes 25A ranges from [60mm 2 ,200mm 2 ], for example, it can be 60mm 2 , 100mm 2 or 200mm 2 The total area of the second bottom wall through hole 25B is in the range of [100mm 2 ,1000mm 2 ], for example, it can be 100mm 2 , 300mm 2 or 1000mm 2 The ratio of the total area of the second bottom wall through holes 25B to the total area of the first bottom wall through holes 25A is a second ratio, and the value range of the second ratio is [2, 5], for example, 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.

[0164] like Figures 4 to 9 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. Figure 4 、 Figure 6 and Figure 8 As shown, a plurality of second bottom wall through holes 25B may be arranged at equal intervals along the circumferential direction DC on the cover plate bottom wall 41H.

[0165] Cover plate bottom wall 41H further includes a third bottom wall portion 23 located between second bottom wall portion 22 and fourth bottom wall portion 24. For example, third bottom wall portion 23 is configured as an annular region located between first bottom wall through-hole 25A and second bottom wall through-hole 25B in radial direction DR. Second bottom wall portion 22 and fourth bottom wall portion 24 are located on either side of third bottom wall portion 23, respectively.

[0166] During use, because the cover bottom wall 41H has a tapered structure that's wider at the bottom and narrower at the top, a significant pressure differential can be created between the upper first bottom wall through-hole 25A and the lower second bottom wall through-hole 25B. When bubbles (foam) initially form within the cooking cavity 61, they are located 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, thus achieving gas-liquid separation.

[0167] 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.

[0168] like Figures 5 to 9 As shown, the third bottom wall portion 23 may be provided with at least one functional groove 49. When the second bottom wall portion 22, the third bottom wall portion 23, and the fourth bottom wall portion 24 are arranged sequentially from the inside to the outside along the radial direction DR, the functional groove 49 may extend along the circumferential direction RC, such that the extension direction of the functional groove 49 is perpendicular to the arrangement direction of the second bottom wall portion 22, the third bottom wall portion 23, and the fourth bottom wall portion 24. Of course, the functional groove 49 may also extend along other directions that are neither perpendicular nor parallel to the arrangement direction of the second bottom wall portion 22, the third bottom wall portion 23, and the fourth bottom wall portion 24. The width of each functional groove 49 can range from, for example, 1 mm to 20 mm. The functional groove 49 may protrude upward or be recessed downward from the surface of the third bottom wall portion 23. The number of functional grooves 49 may be, for example, 1 to 20.

[0169] By providing functional grooves 49 in the third bottom wall portion 23, the structural strength of the cover plate bottom wall 41H is enhanced while also changing the pressure and friction within the overflow prevention cavity 15, achieving both pressure and friction bubble breaking, thereby effectively eliminating foam within the overflow prevention cavity 15 and enhancing overflow prevention effectiveness. Furthermore, the path between the first bottom wall through-hole 25A and the second bottom wall through-hole 25B is lengthened, thereby increasing the length of the reflux channel and increasing the distance traveled by foam from the first bottom wall through-hole 25A to the second bottom wall through-hole 25B, thereby increasing the kinetic energy loss. This further prevents overflow and enhances overflow prevention effectiveness.

[0170] like Figure 5 As shown, the geometric center point M of the second portion 22 of the bottom wall is configured to coincide with the geometric center point N of the bottom wall 41H of the cover plate, so that the bottom wall 41H of the cover plate is configured as a right cone, thereby reducing the difficulty of processing the cover plate 41. For example, the bottom wall 41H of the cover plate has a radially symmetrical structure. The functional groove 49 can be configured as a circular groove with the geometric center point N of the bottom wall 41H as the center of the circle. A plurality of functional grooves 49 can be arranged between the first bottom wall through hole 25A and the second bottom wall through hole 25B at equal intervals along the radial direction DR. Figure 2 and Figure 3 As shown, the exhaust component 30 is not located on the central axis of the cooking cavity 61. Figures 6 to 9 As shown, in the projection of the cover body 10 along the up and down directions, the geometric center point M of the second part 22 of the bottom wall can be constructed to not coincide with the geometric center point N of the bottom wall 41H of the cover plate, that is, the bottom wall 41H of the cover plate is constructed as an oblique cone, so as to facilitate the second part 22 of the bottom wall to be closer to the position of the exhaust component 30, that is, the second part 22 of the bottom wall is closer to the position of the exhaust component 30 than the fourth part 24 of the bottom wall.

[0171] Because the steam exhaust component 30 connects the overflow prevention chamber 15 to the outside world, the contents of the overflow prevention chamber 15 will move toward the steam exhaust component 30. When the first bottom wall through-hole 25A is closer to the steam exhaust component 30 than the second bottom wall through-hole 25B, water vapor will preferentially occupy the space around the steam exhaust component 30, forcing the bubbles to encounter the water vapor to achieve the bubble breaking effect. Otherwise, the bubbles may be discharged from the steam exhaust component 30 before being broken by the water vapor, causing overflow.

[0172] like Figure 6 As shown, when the geometric center point M of the second part 22 of the bottom wall does not overlap with the geometric center point N of the bottom wall 41H of the cover plate, the functional groove 49 can be constructed as an arc groove with the geometric center point N of the bottom wall 41H of the cover plate as the center of the circle, and the second part 22 of the bottom wall is located between the two ends of the arc groove along the circumferential direction RC of the bottom wall of the cover plate 41H.

[0173] Figure 4 and Figure 6 In the embodiment, the functional groove 49 may have a uniform width.

[0174] Of course, if Figure 8 As shown, when the geometric center point M of the second bottom wall portion 22 does not overlap with the geometric center point N of the cover bottom wall 41H, the functional groove 49 can also be constructed as an annular groove, and the center of the annular groove can be located on the line connecting the geometric center point M of the second bottom wall portion 22 and the geometric center point N of the cover bottom wall 41H, so that the functional groove 49 is more evenly arranged between the first bottom wall through hole 25A and the second bottom wall through hole 25B. Figure 8 In this embodiment, because the geometric center point M of the second bottom wall portion 22 does not overlap with the geometric center point N of the cover plate bottom wall 41H, along the radial direction DR, on one side of the second bottom wall portion 22, the distance between the second bottom wall portion 22 and the fourth bottom wall portion 24 is greater, and the third bottom wall portion 23 is wider. On the opposite side, the distance between the second bottom wall portion 22 and the fourth bottom wall portion 24 is greater, and the third bottom wall portion 23 is wider. Consequently, the functional groove 49 is configured with a non-uniform width. When the third bottom wall portion 23 is wider, the functional groove 49 is also wider; when the third bottom wall portion 23 is narrower, the functional groove 49 is also narrower.

[0175] like Figure 5 、 Figure 7 and Figure 9 As shown, two adjacent functional grooves 49 can be constructed with one protruding upward from the surface of the third bottom wall portion 23, while the other is recessed downward from the surface of the third bottom wall portion 23. In other words, the third bottom wall portion 23 can include a wavy structure, or at least partially be constructed as a wavy structure, the wavy structure including alternating upwardly protruding peaks 49A and downwardly recessed troughs 49B, with the peaks 49A and troughs 49B each forming a functional groove 49. The wavy structure of the third bottom wall portion 23 can simply increase the number of functional grooves 49. When the second bottom wall portion 22 is higher than the fourth bottom wall portion 24, while improving the structural strength of the cover plate bottom wall 41H and increasing the length of the reflux channel, it also makes the path between the first bottom wall through hole 25A and the second bottom wall through hole 25B smoother, facilitating liquid reflux to the second bottom wall through hole 25B.

[0176] The distance and connection between the crest portion 49A and the trough portion 49B can be flexibly adjusted. Figure 5 As shown, in a cross section passing through the geometric center point M of the second bottom wall portion 22 and extending in the vertical direction, the third bottom wall portion 23 between the peak portion 49A and the trough portion 49B is a straight line. Figure 7 and Figure 9 As shown, the sidewalls of the groove of the peak portion 49A and the sidewalls of the groove of the trough portion 49B are directly connected, or in other words, the peak portion 49A and the trough portion 49B share the groove sidewalls.

[0177] like Figures 6 to 9As shown, 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.

[0178] like Figures 4 to 9 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 5 、 Figure 7 and Figure 9 ), 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.

[0179] 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.

[0180] like Figure 10 and Figure 11 As shown, the exhaust component 30 includes an exhaust cavity 30A extending in the up-down direction, and the exhaust cavity 30A is used 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 steam exhaust hole 33 is used to connect the overflow prevention cavity 15 with the steam exhaust cavity 30A, and can also be used to connect the steam exhaust cavity 30A with the liner cover steam exhaust cavity 18.

[0181] 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.

[0182] 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.

[0183] The exhaust chamber 30A is arranged above the first portion 21 of the bottom wall, and at least one of the bottom wall 32 of the exhaust chamber 30A and the first portion 21 of the bottom wall is not provided with an opening to prevent bubbles from directly entering the exhaust chamber 30A upward from the overflow prevention cavity 15 and causing overflow. In the projection of the cover body 10 along the up-down direction, the first portion 21 of the bottom wall includes the bottom wall 32 of the entire exhaust chamber 30A. In the projection of the cover body 10 along the up-down direction, the platform area 21A of the first portion 21 of the bottom wall includes the bottom wall 32 of the entire 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 bottom wall 41H of the cover plate) 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 bubble breaking position will be too close to the exhaust component 30, causing the foam to overflow from the exhaust component 30. If the third ratio is too large, the foam will move too short a distance in the anti-overflow cavity 15 , thus affecting the anti-overflow effect.

[0184] like Figure 12 and Figure 13 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] Or, as Figures 14 to 16 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.

[0189] 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.

[0190] Or, as Figure 17 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.

[0191] In the embodiment shown in the figure, the second bottom wall portion 22, the third bottom wall portion 23 and the fourth bottom wall portion 24 are arranged in the radial direction. Of course, in order to make the first bottom wall through hole 25A close to the exhaust component 30, the second bottom wall portion 22 and the fourth bottom wall portion 24 can also be arranged in the radial direction. Figure 2 and Figure 3, are arranged in the left-right direction of the bottom wall 20, with the second bottom wall portion 22 on the right and the fourth bottom wall portion 24 on the left. In other words, in the present application, the second bottom wall portion 22, the third bottom wall portion 23 and the fourth bottom wall portion 24 are arranged in sequence along the first direction, and the third bottom wall portion 23 includes at least one functional groove 49 extending along the second direction, and the functional groove 49 is convex upward or concave downward, wherein the second direction is different from the first direction. Preferably, the second direction is perpendicular to the first direction. In the illustrated embodiment, the first direction is the radial direction of the bottom wall 20, and the second direction is the circumferential direction of the bottom wall 20, and the second bottom wall portion 22, the third bottom wall portion 23 and the fourth bottom wall portion 24 are arranged in sequence from the inside to the outside along the radial direction.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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 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 A cover body, used to cover the pot body, the cover body comprising: An anti-overflow cavity, when the cover body covers the pot body, the bottom wall of the anti-overflow cavity is used to cover the cooking cavity opening, and the anti-overflow cavity is configured to communicate with the outside world, and the bottom wall includes a second bottom wall portion, a third bottom wall portion and a fourth bottom wall portion arranged in sequence along a first direction, wherein the second bottom wall portion is provided with at least one first bottom wall through hole, and the fourth bottom wall portion is provided with at least one second bottom wall through hole, the first bottom wall through hole is smaller than the second bottom wall through hole, and the third bottom wall portion includes at least one functional groove extending along a second direction, the functional groove is convex upward or concave downward, wherein the second direction is different from the first direction.

2. The cooking appliance according to claim 1, wherein The ratio of the volume of the anti-overflow cavity to the volume of the cooking cavity is a first ratio, and the value range of the first ratio is [1 / 40, 4 / 5].

3. The cooking appliance according to claim 1, wherein The pot body comprises: a receiving cavity; and The inner pot body can be removed and placed in the accommodating cavity for holding food. The inner space of the inner pot body forms the cooking cavity, and the volume of the inner pot body is the volume of the cooking cavity.

4. The cooking appliance according to claim 1, wherein The cover body further includes a steam exhaust hole communicating with both the outside world and the anti-overflow cavity, so that the anti-overflow cavity communicates with the outside world through the steam exhaust hole. The first bottom wall through hole is closer to the exhaust through hole than the second bottom wall through hole.

5. The cooking appliance according to claim 4, characterized in that In a projection of the cooking utensil along the up-down direction, at least a portion of the first bottom wall through hole is located between the second bottom wall through hole and the steam exhaust through hole.

6. The cooking appliance according to claim 4, wherein: The cover body further includes a steam exhaust component, which is configured to communicate with the outside world. The steam exhaust component is provided with the steam exhaust through hole, so that the anti-overflow cavity is configured to communicate with the outside through the steam exhaust component.

7. The cooking appliance according to claim 6, wherein: The exhaust component is connected to the top of the anti-overflow cavity, and includes an exhaust cavity extending in an up-down direction and communicating with the outside world, and the exhaust through hole is arranged on the side wall of the exhaust cavity.

8. The cooking appliance according to claim 7, wherein: The bottom wall further includes a first bottom wall portion. The first bottom wall portion and the fourth bottom wall portion are respectively located on opposite sides of the second bottom wall portion. The exhaust cavity is arranged above the first bottom wall portion.

9. The cooking appliance according to claim 8, characterized in that At least one of the bottom wall of the exhaust cavity and the first portion of the bottom wall is not provided with an opening.

10. The cooking appliance according to claim 9, characterized in that 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.

11. The cooking appliance according to claim 10, wherein The first portion of the bottom wall includes a platform area, and the exhaust cavity is arranged above the platform area. 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.

12. The cooking appliance according to claim 7, wherein The height difference between the lower edge of the exhaust hole and the bottom of the exhaust component is at least 5 mm.

13. The cooking appliance according to claim 6, wherein The total area of the exhaust holes is not less than the total area of the first bottom wall holes.

14. The cooking appliance according to claim 1, wherein The second portion of the bottom wall is higher than the fourth portion of the bottom wall.

15. The cooking appliance according to claim 14, wherein The height difference between the lowest point of the first bottom wall through hole and the highest point of the second bottom wall through hole is greater than or equal to 3 mm; and / or The fourth portion of the bottom wall is located at the lowest position of the bottom wall.

16. The cooking appliance according to claim 1, 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 cooking appliance 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 cooking appliance according to claim 16, wherein The total area of the first bottom wall through hole is in the range of [60mm 2 , 200mm 2 ]; and / or The total area of the second bottom wall through hole is in the range of [100mm 2 , 1000mm 2 ].

19. The cooking appliance according to claim 16, wherein The number of the first bottom wall through holes is 10 to 64, and / or The number of the second bottom wall through holes is 5 to 30.

20. The cooking appliance according to claim 1, wherein The third portion of the bottom wall comprises a wavy structure, wherein the wavy structure comprises alternating upwardly protruding crests and downwardly recessed troughs, wherein the crests and troughs form the functional groove; and / or The second direction is perpendicular to the first direction.

21. The cooking appliance according to claim 1, wherein The width of the functional groove is in the range of [1mm, 20mm]; and / or The number of the functional slots is 1 to 20.

22. The cooking appliance according to any one of claims 1 to 21, characterized in that The first direction is a radial direction of the bottom wall, the second direction is a circumferential direction of the bottom wall, and the second bottom wall portion, the third bottom wall portion, and the fourth bottom wall portion are sequentially arranged from inside to outside along the radial direction.

23. The cooking appliance according to claim 22, wherein The fourth portion of the bottom wall is an annular area with the geometric center of the bottom wall as the center of the circle.

24. The cooking appliance according to claim 23, wherein The fourth portion of the bottom wall is provided with a plurality of second bottom wall through holes, and the second bottom wall through holes are distributed at equal intervals along the circumferential direction of the bottom wall.

25. The cooking appliance according to claim 23, wherein The geometric center of the second portion of the bottom wall overlaps with the geometric center of the bottom wall, and the functional groove is constructed as a circular groove with the geometric center of the bottom wall as the center of the circle.

26. The cooking appliance according to claim 23, wherein The geometric center of the second part of the bottom wall does not overlap with the geometric center of the bottom wall. The functional groove is constructed as an arc groove with the geometric center of the bottom wall as the center of the circle. The second part of the bottom wall is located between the two ends of the arc groove along the circumferential direction of the bottom wall.

27. The cooking appliance according to claim 23, wherein The geometric center of the second portion of the bottom wall does not overlap with the geometric center of the bottom wall. The functional groove is constructed as an annular groove, and the center of the annular groove is located on the line connecting the geometric center of the second portion of the bottom wall and the geometric center of the bottom wall.

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