Lid assembly and cooking appliance having the same

Abstract

This invention provides a lid assembly and a cooking appliance having the same. The lid assembly includes: a cover with a ventilation hole in its center; a baking assembly disposed above the cover and corresponding to the ventilation hole; an exhaust pipe passing through the cover; a pressure relief valve disposed above the exhaust pipe; a sealing cover detachably disposed below the cover, the sealing cover having an upwardly protruding first annular limiting protrusion and a limiting ring disposed inside the first annular limiting protrusion; and a first sealing part including a first sealing lip, a second sealing lip, and a limiting part, wherein the first sealing lip seals against the outer surface of the first annular limiting protrusion, and the second sealing lip seals against the lower surface of the cover to isolate the exhaust pipe and the baking assembly. The technical solution of this application effectively solves the problem in related technologies where steam enters the baking assembly, forming condensation that damages the baking assembly.

Description

Technical Field

[0001] This invention relates to the field of small household appliance technology, and more specifically, to a cover assembly and a cooking appliance having the same. Background Technology

[0002] In related technologies, multi-functional cooking appliances have pressure cooking and baking cooking modes, allowing users to choose between these two modes according to their needs, greatly simplifying the user experience. The pressure requirements within the cooking chamber differ between these two cooking modes, therefore, they are typically equipped with two lids—a pressure lid and a baking lid—to accommodate different cooking modes.

[0003] Currently, integrated lid assemblies are available on the market, meaning a single lid assembly can be used for both pressure cooking and baking. In pressure cooking, a large amount of steam is generated inside the cooking chamber. This steam enters the baking assembly, forming condensation and damaging the assembly. Summary of the Invention

[0004] The main objective of this invention is to provide a cover assembly and a cooking appliance having the same, in order to solve the problem in the related art where steam enters the baking assembly and forms condensation that damages the baking assembly.

[0005] To achieve the above objectives, according to one aspect of the present invention, a cover assembly is provided, comprising: a cover having a ventilation hole in its center; a baking assembly disposed above the cover and corresponding to the ventilation hole; an exhaust pipe passing through the cover; a pressure relief valve disposed above the exhaust pipe; a sealing cover detachably disposed below the cover, the sealing cover having an upwardly protruding first annular limiting protrusion and a limiting ring disposed inside the first annular limiting protrusion, the first annular limiting protrusion surrounding the outer side of the ventilation hole and located inside the exhaust pipe; and a first sealing portion including a first sealing lip, a second sealing lip, and a limiting portion, the limiting portion cooperating with the first annular limiting protrusion to fix the first sealing portion to the sealing cover, wherein the first sealing lip seals against the outer surface of the first annular limiting protrusion, and the second sealing lip seals against the lower surface of the cover to isolate the exhaust pipe and the baking assembly.

[0006] The cover assembly of this embodiment includes a cover, a baking assembly, and a sealing cover. The sealing cover is detachably disposed below the cover. In baking cooking mode, removing the sealing cover allows the food in the cooking cavity to be heated via the baking assembly. In pressure cooking mode, installing the sealing cover below the cover isolates the baking assembly from the cooking cavity, preventing steam from entering the baking assembly during pressure cooking. Specifically, the sealing cover has a first sealing portion, including a first sealing lip and a second sealing lip. The first sealing lip seals against the outer surface of a first annular limiting protrusion, and the second sealing lip seals against the lower surface of the cover. This structure prevents steam generated during pressure cooking from entering the baking assembly. As the pressure inside the cooking cavity increases, the first sealing lip adheres tightly to the outer surface of the first annular limiting protrusion under pressure, and the second sealing lip adheres tightly to the lower surface of the cover under pressure, further ensuring a tight seal and preventing steam generated during pressure cooking from entering the baking assembly through the gap between the cover and the sealing cover. Therefore, the technical solution of this application can effectively solve the problem in the related technology that steam entering the baking assembly forms condensate and damages the baking assembly.

[0007] Furthermore, the cover is provided with a downwardly protruding second annular limiting protrusion, and the second sealing lip is inclined upward and seals against the outer surface of the second annular limiting protrusion, with a suitable shape. After pressure is applied inside the cooking cavity, the second sealing lip is pressed tightly against the second annular limiting protrusion under the pressure directed upward, resulting in a good sealing effect. At the same time, a narrow gap can be formed between the second annular limiting protrusion and the first annular limiting protrusion in the height direction to clamp the first sealing part, preventing the first sealing part from being squeezed inward and dislodging from the sealing position when the pressure is too high.

[0008] Furthermore, the protrusion dimension of the first annular limiting protrusion is larger than that of the second annular limiting protrusion. This arrangement allows for a more compact internal structure within the cover assembly, reducing its overall volume.

[0009] Furthermore, the first annular limiting protrusion includes an inclined first annular inner wall and an inclined first annular outer wall, forming a first included angle α between the first annular inner wall and the first annular outer wall; the second annular limiting protrusion includes an inclined second annular inner wall and an inclined second annular outer wall, forming a second included angle b between the second annular inner wall and the second annular outer wall, wherein the first included angle α is smaller than the second included angle b. This arrangement is adapted to the height relationship between the first annular limiting protrusion and the second annular limiting protrusion, making the structure of the sealing cover and the snap-on cover more reasonable.

[0010] Furthermore, the range of the first included angle 'a' satisfies: 23° ≤ a ≤ 33°, and the range of the second included angle 'b' satisfies: 95° ≤ b ≤ 105°. When the first included angle 'a' satisfies the above range, it reduces the processing difficulty of the first annular limiting protrusion while ensuring the sealing effect between the first sealing lip and the outer surface of the first annular limiting protrusion. Similarly, when the second included angle 'b' satisfies the above range, it reduces the processing difficulty of the second annular limiting protrusion while ensuring the sealing effect between the second sealing lip and the outer surface of the second annular limiting protrusion.

[0011] Furthermore, the first annular limiting protrusion also includes a first arcuate portion located between the inner wall and the outer wall of the first annulus, and the second annular limiting protrusion also includes a second arcuate portion located between the inner wall and the outer wall of the second annulus. By connecting the inner wall and the outer wall of the first annulus through the first arcuate portion and connecting the inner wall and the outer wall of the second annulus through the second arcuate portion, the structural strength of the first and second annular limiting protrusions can be guaranteed.

[0012] Furthermore, a third angle c is formed between the first sealing lip and the second sealing lip, and the range of the third angle c is: 46°≤c≤57°. The sealing effect is guaranteed when the third angle c meets the above range.

[0013] Furthermore, the length L1 of the first sealing lip is greater than the length L2 of the second sealing lip. This arrangement is adapted to the height relationship between the first annular limiting protrusion and the second annular limiting protrusion, ensuring a sealing effect.

[0014] Furthermore, the length L1 of the first sealing lip is within the range of 7.5mm ≤ L1 ≤ 10.5mm, and the length L2 of the second sealing lip is within the range of 4mm ≤ L2 ≤ 8mm. When the length L1 meets the above range, it ensures a good seal between the first sealing lip and the outer surface of the first annular limiting protrusion. When the length L2 meets the above range, it ensures a good seal between the second sealing lip and the outer surface of the second annular limiting protrusion.

[0015] Furthermore, the limiting portion includes a first limiting lip and a second limiting lip. The first limiting lip is sandwiched between the second annular limiting protrusion and the limiting ring, and a receiving recess for accommodating the limiting ring is formed between the first limiting lip and the second limiting lip. The first limiting lip is sandwiched between the first annular limiting protrusion and the limiting ring, and the second limiting lip is sandwiched between the second annular limiting protrusion and the limiting ring. The limiting ring is located within the receiving recess formed between the first limiting lip and the second limiting lip, ensuring the fixation effect on the first sealing portion.

[0016] Furthermore, the first limiting lip is sealed to the inner surface of the first annular limiting protrusion, and / or the second limiting lip is inclined upward and seals to the inner surface of the second annular limiting protrusion. This increases the sealing area between the first sealing part and the second annular limiting protrusion, thereby enhancing the sealing effect.

[0017] Furthermore, the second annular limiting protrusion and the first annular limiting protrusion are offset, with the bottom of the second annular limiting protrusion located between the top of the first annular limiting protrusion and the limiting ring. During the pressing process, the sealing cover is squeezed upward by the pressure inside the cooking cavity, and the second annular limiting protrusion, the first annular limiting protrusion, and the limiting ring clamp the first sealing part in the vertical direction, which can keep the first sealing part in the sealing position and ensure the sealing effect.

[0018] Furthermore, the lid has a downwardly protruding recessed section, located inside the second annular limiting protrusion. The baking assembly is positioned on the recessed section, which includes a base plate and side plates connected to the outer periphery of the base plate. Both the base plate and the side plates have ventilation holes. In baking mode, hot air can be blown into the cooking cavity through the ventilation holes to heat the food.

[0019] Furthermore, the height of the recessed platform is greater than the height of the second annular limiting protrusion. This prevents the second annular limiting protrusion from blocking the hot air blown out through the side panel, ensuring effective heating of the food.

[0020] Furthermore, the cover assembly also includes a connecting assembly, which comprises a fixing part passing through the cover and a connecting part passing through the sealing cover, with the connecting part and the fixing part being plugged into each other. This arrangement enables a detachable connection between the sealing cover and the cover, and has the advantages of simple structure and easy disassembly.

[0021] Furthermore, the lid assembly also includes a second sealing portion disposed on the outer periphery of the sealing cover. The second sealing portion is located outside the first sealing portion and includes an upwardly extending first lip and a downwardly extending second lip. A connecting recess is provided between the first and second lips, and the sealing cover is disposed within the connecting recess. During pressure cooking, the second sealing portion is sandwiched between the lid and the pot body to seal the cooking cavity and ensure the pressure effect.

[0022] Furthermore, the sealing cover is also provided with an air vent, which is located outside the first annular limiting protrusion. The exhaust pipe is located outside the first annular limiting protrusion. During exhaust, the gas inside the cooking cavity can enter the cover assembly through the air vent and then be discharged through the exhaust pipe.

[0023] Furthermore, the baking assembly includes a cover, a heating element, a fan blade, and a motor assembly for driving the fan blade to rotate. The cover is positioned above and fitted against the cover, with its center protruding upwards to form a receiving space between the cover and the cover. The fan blade is disposed within this receiving space, and the motor assembly is positioned above the cover. The cover assembly also includes a faceplate that covers the cover and the baking assembly. This arrangement makes the internal structure of the cover assembly more compact, reducing its overall volume.

[0024] According to another aspect of the present invention, a cooking appliance is provided, comprising a pot body and a lid assembly disposed on the pot body, the lid assembly being the aforementioned lid assembly. The aforementioned lid assembly effectively solves the problem in the related art where steam enters the baking assembly, forming condensation that damages the baking assembly. The cooking appliance having the aforementioned lid assembly also possesses the aforementioned advantages. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the cover assembly according to the present invention is shown;

[0027] Figure 2 It shows Figure 1 An exploded structural diagram of a portion of the cover assembly;

[0028] Figure 3 It shows Figure 2 A three-dimensional structural diagram of the cover assembly;

[0029] Figure 4 It shows Figure 3 A cross-sectional schematic diagram of the cover assembly;

[0030] Figure 5 It shows Figure 4 Enlarged view of point A on the cover assembly;

[0031] Figure 6 It shows Figure 1 A three-dimensional structural diagram of the lid assembly;

[0032] Figure 7 It shows Figure 6 A cross-sectional schematic diagram of the partial structure of the cover;

[0033] Figure 8 It shows Figure 1 A three-dimensional structural diagram of the sealing cover of the cover assembly;

[0034] Figure 9 It shows Figure 8 A cross-sectional schematic diagram of a portion of the sealing cover structure;

[0035] Figure 10a and Figure 10b It shows Figure 1 A cross-sectional schematic diagram of a portion of the structure of the first sealing part of the cover assembly; and

[0036] Figure 11 It shows Figure 1 A cross-sectional schematic diagram of a portion of the structure of the second sealing part of the cover assembly.

[0037] The above figures include the following reference numerals:

[0038] 10. Cover; 11. Second annular limiting protrusion; 111. Second annular inner wall; 112. Second annular outer wall; 113. Second arc portion; 12. Recessed platform portion; 121. Base plate; 122. Side plate; 13. Ventilation hole; 20. Baking assembly; 21. Cover; 22. Heating element; 23. Fan blade; 24. Motor assembly; 25. Accommodation space; 26. Fixing buckle; 30. Exhaust pipe; 50. Sealing cover; 51. First annular limiting protrusion; 511. First annular... 512. Inner wall; 513. First annular outer wall; 514. First arc portion; 52. Limiting ring; 53. Vent hole; 54. Connector; 60. First sealing portion; 61. First sealing lip; 62. Second sealing lip; 63. First limiting lip; 64. Second limiting lip; 65. Receiving recess; 70. Connecting assembly; 71. Fixing portion; 72. Connecting portion; 80. Second sealing portion; 81. First lip; 82. Second lip; 83. Connecting recess; 90. Cover. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] like Figures 1 to 5 As shown, the cover assembly of this embodiment includes: a cover 10, a baking assembly 20, an exhaust pipe 30, a pressure relief valve, a sealing cover 50, and a first sealing part 60. The cover 10 has a ventilation hole 13 in the middle; the baking assembly 20 is located above the cover 10 and corresponds to the ventilation hole 13; the exhaust pipe 30 passes through the cover 10; the pressure relief valve is located above the exhaust pipe 30; the sealing cover 50 is detachably located below the cover 10, and the sealing cover 50 has an upwardly protruding first annular limiting protrusion 51 and a limiting ring 52 located inside the first annular limiting protrusion 51. The first annular limiting protrusion 51 is arranged around the outside of the ventilation hole 13 and is located inside the exhaust pipe 30; the first sealing part 60 includes a first sealing lip 61, a second sealing lip 62 and a limiting part. The limiting part cooperates with the first annular limiting protrusion 51 to fix the first sealing part 60 to the sealing cover 50. The first sealing lip 61 is sealed to the outer side of the first annular limiting protrusion 51, and the second sealing lip 62 is sealed to the lower surface of the cover 10 to isolate the exhaust pipe 30 and the baking assembly 20.

[0043] Using the technical solution of this embodiment, the cover assembly includes: a cover 10, a baking assembly 20, and a sealing cover 50. The sealing cover 50 is detachably disposed below the cover 10. In baking cooking mode, removing the sealing cover 50 allows the food in the cooking cavity to be heated by the baking assembly 20. In pressure cooking mode, installing the sealing cover 50 below the cover 10 isolates the baking assembly 20 from the cooking cavity, preventing steam from entering the interior of the baking assembly 20 during pressure cooking. Specifically, the sealing cover 50 is provided with a first sealing part 60, which includes a first sealing lip 61 and a second sealing lip 62. The first sealing lip 61 seals against the outer surface of the first annular limiting protrusion 51, and the second sealing lip 62 seals against the lower surface of the cover 10. This structure prevents steam generated during pressure cooking from entering the interior of the baking assembly 20. As the pressure inside the cooking cavity increases, the first sealing lip 61 will adhere tightly to the outer surface of the first annular limiting protrusion 51 under the pressure, and the second sealing lip 62 will adhere tightly to the lower surface of the cover 10 under the pressure, further ensuring the sealing effect and preventing steam generated during the pressure cooking process from entering the baking assembly 20 through the gap between the cover 10 and the sealing cover 50. Therefore, the technical solution of this embodiment can effectively solve the problem in related technologies where steam enters the baking assembly and forms condensation that damages the baking assembly.

[0044] It should be noted that, as Figure 4 As shown, in this application, "inner side" refers to the side closer to the vertical axis of the cover assembly, and "outer side" refers to the side away from the vertical axis of the cover assembly, that is, the side closer to the edge of the cover assembly. The "middle part of the cover 10" mentioned above is not limited to the center position.

[0045] like Figures 4 to 7 As shown, in this embodiment, the cover 10 is provided with a downwardly protruding second annular limiting protrusion 11, and the second sealing lip 62 is inclined upward and seals against the outer surface of the second annular limiting protrusion 11, with a shape that is adapted to fit. Thus, after pressure is applied inside the cooking cavity, the second sealing lip 62 is pressed against the second annular limiting protrusion 11 under the upward pressure, resulting in a good sealing effect. Simultaneously, a narrow gap can be formed between the second annular limiting protrusion 11 and the first annular limiting protrusion 51 in the height direction to clamp the first sealing part 60, preventing the first sealing part 60 from being squeezed inward and dislodging from the sealing position when the pressure is too high.

[0046] In addition, such as Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, the sealing cover 50 also includes a limiting ring 52 disposed inside the first annular limiting protrusion 51. The limiting ring 52 is welded to the main body of the sealing cover 50 via multiple connectors 54. It has the advantages of simple structure and ease of manufacturing. The limiting part cooperates with the first annular limiting protrusion 51 to fix the first sealing part 60 to the sealing cover 50. During the pressing process, the limiting ring 52 can also stop the first sealing part 60, preventing it from being squeezed inward and dislodging from the sealing position when the pressure is too high.

[0047] In this embodiment, the first annular limiting protrusion 51 on the sealing cover 50 can enhance the strength of the sealing cover 50, thus allowing the sealing cover 50 to be made thinner and effectively reducing the production cost of the cover assembly. When pressure is applied, the sealing cover 50 bears a certain pressure, and the first annular limiting protrusion 51 is pressed tightly against the lower surface of the cover 10, so that the cover 10 and the sealing cover 50 bear pressure together.

[0048] like Figure 4 , Figure 5 as well as Figures 8 to 1 As shown in Figure 0, the limiting portion includes a first limiting lip 63 and a second limiting lip 64. The first limiting lip 63 is sandwiched between the second annular limiting protrusion 11 and the limiting ring 52. A receiving recess 65 for accommodating the limiting ring 52 is formed between the first limiting lip 63 and the second limiting lip 64. The first limiting lip 63 is sandwiched between the first annular limiting protrusion 51 and the limiting ring 52, and the second limiting lip 64 is sandwiched between the second annular limiting protrusion 11 and the limiting ring 52. The limiting ring 52 is located within the receiving recess 65 formed between the first limiting lip 63 and the second limiting lip 64, ensuring a secure fixation of the first sealing portion 60.

[0049] like Figure 4 and Figure 5 As shown, the first limiting lip 63 is sealed to the inner surface of the first annular limiting protrusion 51, and the second limiting lip 64 is inclined upward and seals to the inner surface of the second annular limiting protrusion 11. This increases the sealing area between the first sealing part 60 and the second annular limiting protrusion 11 and the first annular limiting protrusion 51, thus enhancing the sealing effect.

[0050] like Figure 4 and Figure 5As shown, in this embodiment, the second annular limiting protrusion 11 and the first annular limiting protrusion 51 are offset, and the bottom of the second annular limiting protrusion 11 is located between the top of the first annular limiting protrusion 51 and the limiting ring 52. It should be noted that the above-mentioned "the bottom of the second annular limiting protrusion 11 is located between the top of the first annular limiting protrusion 51 and the limiting ring 52" means that in the transverse direction, the lowest point of the second annular limiting protrusion 11 is between the highest point of the first annular limiting protrusion 51 and the highest point of the limiting ring 52. In this way, during the upward pressing process, the sealing cover 50 is squeezed upward by the pressure inside the cooking cavity, and the second annular limiting protrusion 11, the first annular limiting protrusion 51 and the limiting ring 52 clamp the first sealing part 60 in the vertical direction, so that the first sealing part 60 is kept in the sealing position and the sealing effect is guaranteed.

[0051] like Figures 4 to 7 As shown, in this embodiment, the cover 10 has a downwardly protruding recessed portion 12, which is located inside the second annular limiting protrusion 11. The baking assembly 20 is located at the recessed portion 12. The recessed portion 12 includes a base plate 121 and a side plate 122 connected to the outer periphery of the base plate 121. Both the base plate 121 and the side plate 122 are provided with ventilation holes 13. In baking mode, hot air can be blown into the cooking cavity through the ventilation holes 13 to heat the food.

[0052] like Figure 5 As shown, in this embodiment, the height of the recessed portion 12 is greater than the height of the second annular limiting protrusion 11. This prevents the second annular limiting protrusion 11 from blocking the hot air blown out via the side plate 122, ensuring the heating effect on the food. Correspondingly, the protrusion size of the first annular limiting protrusion 51 is greater than the protrusion size of the second annular limiting protrusion 11. In this way, the sealing cover 50 can avoid the recessed portion 12, making the internal structure of the cover assembly more compact and reducing the volume of the cover assembly.

[0053] like Figure 4 , Figure 5 , Figure 7 as well as Figure 9 As shown, the first annular limiting protrusion 51 includes an inclined first annular inner wall 511 and an inclined first annular outer wall 512, forming a first included angle α between the first annular inner wall 511 and the first annular outer wall 512; the second annular limiting protrusion 11 includes an inclined second annular inner wall 111 and an inclined second annular outer wall 112, forming a second included angle b between the second annular inner wall 111 and the second annular outer wall 112, wherein the first included angle α is smaller than the second included angle b. This arrangement is adapted to the height relationship between the first annular limiting protrusion 51 and the second annular limiting protrusion 11, making the structure of the sealing cover 50 and the buckle cover 10 more reasonable.

[0054] Specifically, in this embodiment, such as Figure 7 and Figure 9 As shown, the range of the first included angle α satisfies: 23° ≤ a ≤ 33°. When the first included angle α satisfies this range, it reduces the processing difficulty of the first annular limiting protrusion 51 while ensuring the sealing effect between the first sealing lip 61 and the outer surface of the first annular limiting protrusion 51. The range of the second included angle b satisfies: 95° ≤ b ≤ 105°. When the second included angle b satisfies this range, it reduces the processing difficulty of the second annular limiting protrusion 11 while ensuring the sealing effect between the second sealing lip 62 and the outer surface of the second annular limiting protrusion 11. Preferably, the first included angle α can be 23°, 28°, or 33°, etc. The second included angle b can be 95°, 100°, or 105°, etc.

[0055] like Figure 4 , Figure 5 , Figure 7 as well as Figure 9 As shown, the first annular limiting protrusion 51 further includes a first arcuate portion 513 located between the first annular inner wall 511 and the first annular outer wall 512, and the second annular limiting protrusion 11 further includes a second arcuate portion 113 located between the second annular inner wall 111 and the second annular outer wall 112. The first arcuate portion 513 connects the first annular inner wall 511 and the first annular outer wall 512, and the second arcuate portion 113 connects the second annular inner wall 111 and the second annular outer wall 112, thus ensuring the structural strength of the first annular limiting protrusion 51 and the second annular limiting protrusion 11.

[0056] In this embodiment, the shape of the first sealing part 60 is adapted to the structure of the first annular limiting protrusion 51 and the second annular limiting protrusion 11. When pressed up, the first sealing part 60 can fit tightly with the first annular limiting protrusion 51 and the second annular limiting protrusion 11 respectively, resulting in a good sealing effect.

[0057] Accordingly, such as Figure 10a As shown, there is a fourth included angle a' between the first sealing lip 61 and the first limiting lip 63, and a fifth included angle b' between the second sealing lip 62 and the second limiting lip 64, wherein the first included angle a is equal to the fourth included angle a' and the second included angle b is equal to the fifth included angle b'.

[0058] like Figure 10a As shown, a third included angle c is formed between the first sealing lip 61 and the second sealing lip 62, and the range of the third included angle c is: 46°≤c≤57°. The sealing effect is guaranteed when the third included angle c meets the above range. Preferably, the third included angle c is 46°, 51°, or 57°, etc.

[0059] like Figure 10bAs shown, the length L1 of the first sealing lip 61 is greater than the length L2 of the second sealing lip 62.

[0060] Specifically, the length L1 of the first sealing lip is within the range of 7.5mm ≤ L1 ≤ 10.5mm. When the length L1 meets this range, the sealing effect between the first sealing lip 61 and the outer surface of the first annular limiting protrusion 51 is guaranteed. The length L2 of the second sealing lip is within the range of 4mm ≤ L2 ≤ 8mm. When the length L2 meets this range, the sealing effect between the second sealing lip 62 and the outer surface of the second annular limiting protrusion 11 is guaranteed. Preferably, the length L1 is 7.5mm, 9mm, or 10.5mm, etc., and the length L2 is 4mm, 6mm, or 8mm, etc.

[0061] like Figure 2 and Figure 4 As shown, the cover assembly also includes a connecting component 70, which includes a fixing part 71 passing through the cover 10 and a connecting part 72 passing through the sealing cover 50. The connecting part 72 is plugged into the fixing part 71. This arrangement enables a detachable connection between the sealing cover 50 and the cover 10, and has the advantages of simple structure and easy disassembly.

[0062] like Figure 4 and Figure 11 As shown, the cover assembly also includes a second sealing portion 80 disposed on the outer periphery of the sealing cover 50. The second sealing portion 80 is located outside the first sealing portion 60 and includes an upwardly extending first lip 81 and a downwardly extending second lip 82. A connecting recess 83 is provided between the first lip 81 and the second lip 82, and the sealing cover 50 is disposed within the connecting recess 83. During pressure cooking, the second sealing portion 80 is sandwiched between the lid 10 and the pot body to seal the cooking cavity and ensure the pressure effect.

[0063] like Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, the sealing cover 50 is also provided with an air vent 53, which is located outside the first annular limiting protrusion 51. The exhaust pipe 30 is located outside the first annular limiting protrusion 51. When venting, the gas inside the cooking cavity can enter the cover assembly through the air vent 53 and then be discharged through the exhaust pipe 30.

[0064] like Figures 1 to 4As shown, the baking assembly 20 includes a cover 21, a heating element 22, a fan blade 23, and a motor assembly 24 for driving the fan blade 23 to rotate. The cover 21 is positioned above and fitted against the cover 10. The middle of the cover 21 protrudes upward to form a receiving space 25 between the cover 21 and the cover 10. The heating element 22 and the fan blade 23 are both disposed within the receiving space 25, and the motor assembly 24 is positioned above the cover 21. The cover assembly also includes a faceplate 90, which covers the cover 10 and the baking assembly 20. The heating element 22 is mounted on the cover 21 via a fixing buckle 26. This arrangement makes the internal structure of the cover assembly more compact and reduces the volume of the cover assembly.

[0065] In this embodiment, the heating element 22 is mounted on the cover 21 via a fixing buckle 26. After the motor assembly 24 passes through the cover 21, the fan blade 23 is installed and fixed with a nut. The fixing part 71 passes through the center hole of the cover 10 and is fixed with a nut to form a fixing buckle. The motor assembly 24 is also fixed to the cover 21 with screws. The limiting ring 52 is welded to the sealing cover 50, and the first sealing part 60 is fitted between the limiting ring 52 and the first annular limiting protrusion 51 for positioning. The second sealing part 80 is fitted onto the cover 10. The connecting part 72 passes through the center hole of the sealing cover 50 and is inserted into the fixing part 71 for connection.

[0066] During pressure cooking, the connecting part 72 and the fixing part 71 are inserted and connected to attach the sealing cover 50 to the cover 10. At this time, the first annular limiting protrusion 51 and the second annular limiting protrusion 11 are in contact. When a certain pressure is generated inside the pot, the air pressure enters the outer periphery of the first sealing part 60 through the air passage 53. Under the action of pressure, the first sealing lip 61 and the second sealing lip 62 are pushed open to both sides and are in contact with the first annular limiting protrusion 51 and the second annular limiting protrusion 11 respectively.

[0067] The sealing performance of the cover assemblies obtained in Examples 1 to 11 and Comparative Examples 1 to 8 was tested, and the performance is shown in Table 1.

[0068] Table 1

[0069]

[0070] The aforementioned sealing performance refers to the maximum pressure that the cover assembly can withstand without leaking air. In this embodiment, the product is qualified when the sealing performance is above 200 kPa.

[0071] As can be seen from the data comparison in Table 1, by adopting the technical solutions of Embodiments 1 to 11 of the present invention, the sealing performance of the cover assembly can be improved by taking reasonable values ​​for the five parameters.

[0072] Data from Examples 1 to 3 and Comparative Example 1 show that the sealing performance of the cover assembly decreases as the first included angle α increases. When the range of the first included angle α satisfies 23°≤a≤33°, the cover assembly can meet the sealing requirements; when the first included angle α = 50°, the cover assembly cannot meet the sealing requirements.

[0073] Data from Examples 2, 4, 5, and Comparative Example 2 show that the sealing performance of the cover assembly weakens as the second included angle b increases. When the range of the second included angle b is 95° ≤ b ≤ 105°, the cover assembly meets the sealing requirements; when the second included angle b = 120°, the cover assembly fails to meet the sealing requirements.

[0074] Data from Examples 2, 6, 7, and Comparative Example 3 show that the sealing performance of the cover assembly increases with the increase of the third included angle c. When the range of the third included angle c is 46° ≤ c ≤ 57°, the cover assembly meets the sealing requirements; when the third included angle c = 35°, the cover assembly fails to meet the sealing requirements.

[0075] Data from Examples 2, 8, 9, and Comparative Example 4 show that as the length L1 increases, the sealing performance of the cover assembly also improves. Similarly, data from Examples 2, 10, 11, and Comparative Example 5 show that as the length L2 increases, the sealing performance of the cover assembly also improves. That is, given sufficient internal space in the cover assembly, the larger the lengths L1 and L2, the better. In this embodiment, the length L1 of the first sealing lip is within the range of 7.5mm ≤ L1 ≤ 10.5mm; the length L2 of the second sealing lip is within the range of 4mm ≤ L2 ≤ 8mm, thus simultaneously satisfying both the sealing performance requirements and the requirement for a compact internal structure in the cover assembly.

[0076] Data from Examples 1 to 11 and Comparative Examples 1 to 8 show that when the range of the first included angle α satisfies: 23° ≤ a ≤ 33°, the range of the second included angle β satisfies: 95° ≤ b ≤ 105°, and the range of the third included angle β satisfies: 46° ≤ c ≤ 57°, the range of the length L1 of the first sealing lip satisfies: 7.5mm ≤ L1 ≤ 10.5mm, and the range of the length L2 of the second sealing lip satisfies: 4mm ≤ L2 ≤ 8mm, thus meeting the sealing requirements of the cover assembly. When one or more of the above five values ​​exceed the corresponding range, the cover assembly fails to meet the sealing requirements.

[0077] This application also provides a cooking appliance, including a pot body and a lid assembly disposed on the pot body, wherein the lid assembly is the aforementioned lid assembly. The aforementioned lid assembly includes a first sealing portion 60, which includes a first sealing lip 61 and a second sealing lip 62. The first sealing lip 61 seals against the outer surface of a first annular limiting protrusion 51, and the second sealing lip 62 seals against the lower surface of a cover 10. This prevents steam generated during pressure cooking from entering the baking assembly 20. As the pressure inside the cooking cavity increases, the first sealing lip 61 will press tightly against the outer surface of the first annular limiting protrusion 51 under pressure, and the second sealing lip 62 will press tightly against the lower surface of the cover 10 under pressure, further ensuring the sealing effect and preventing steam generated during pressure cooking from entering the baking assembly 20 through the gap between the cover 10 and the sealing cover 50. The aforementioned lid assembly effectively solves the problem in related technologies where steam enters the baking assembly and forms condensation that damages the baking assembly. Therefore, the cooking appliance with the aforementioned lid assembly also has the aforementioned advantages.

[0078] In this embodiment, the cooking appliance is a multi-functional cooking appliance with pressure cooking mode and baking cooking mode. Of course, in embodiments not shown in the figure, the cooking appliance can also be a rice cooker, a low-pressure rice cooker, a soy milk maker, a food processor, a stir-fry machine, an electric slow cooker, a multi-functional pot, etc.

[0079] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0080] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0081] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cover assembly, characterized in that, include: A cover (10) is provided with a ventilation hole (13) in the middle of the cover (10), and the cover (10) has a cover tooth; A baking assembly (20) is disposed above the cover (10) and corresponding to the ventilation hole (13); An exhaust pipe (30) is inserted through the cover (10); A pressure relief valve is located above the exhaust pipe (30); A sealing cover (50) is detachably disposed below the cover (10). The sealing cover (50) is provided with an upwardly protruding first annular limiting protrusion (51) and a limiting ring (52) disposed inside the first annular limiting protrusion (51). The first annular limiting protrusion (51) is disposed around the outside of the ventilation hole (13) and is located inside the exhaust pipe (30). The first sealing part (60) includes a first sealing lip (61), a second sealing lip (62), and a limiting part. The limiting part cooperates with the first annular limiting protrusion (51) to fix the first sealing part (60) to the sealing cover (50). The first sealing lip (61) is sealed to the outer side of the first annular limiting protrusion (51), and the second sealing lip (62) is sealed to the lower surface of the cover (10) to isolate the exhaust pipe (30) and the baking assembly (20). The cover assembly further includes a second sealing portion (80) disposed on the outer periphery of the sealing cover (50). The second sealing portion (80) is disposed on the outside of the first sealing portion (60). The second sealing portion (80) includes an upwardly extending first lip (81) and a downwardly extending second lip (82). A connecting recess (83) is provided between the first lip (81) and the second lip (82). The sealing cover (50) is disposed in the connecting recess (83). The sealing cover (50) is also provided with an air vent (53).

2. The cover assembly according to claim 1, characterized in that, The cover (10) is provided with a downwardly protruding second annular limiting protrusion (11), and the second sealing lip (62) is inclined upward and seals with the outer side of the second annular limiting protrusion (11) and is adapted in shape.

3. The cover assembly according to claim 2, characterized in that, The protrusion size of the first annular limiting protrusion (51) is greater than the protrusion size of the second annular limiting protrusion (11).

4. The cover assembly according to claim 2, characterized in that, The first annular limiting protrusion (51) includes an inclined first annular inner wall (511) and an inclined first annular outer wall (512), and a first included angle α is formed between the first annular inner wall (511) and the first annular outer wall (512); The second annular limiting protrusion (11) includes an inclined second annular inner wall (111) and an inclined second annular outer wall (112), and a second included angle b is formed between the second annular inner wall (111) and the second annular outer wall (112). Wherein, the first included angle a is smaller than the second included angle b.

5. The cover assembly according to claim 4, characterized in that, The range of the first included angle 'a' satisfies: 23°≤a≤33°, and the range of the second included angle 'b' satisfies: 95°≤b≤105°.

6. The cover assembly according to claim 4, characterized in that, The first annular limiting protrusion (51) further includes a first arc portion (513) located between the first annular inner wall (511) and the first annular outer wall (512), and the second annular limiting protrusion (11) further includes a second arc portion (113) located between the second annular inner wall (111) and the second annular outer wall (112).

7. The cover assembly according to claim 1, characterized in that, A third included angle c is formed between the first sealing lip (61) and the second sealing lip (62), and the range of the third included angle c is: 46°≤c≤57°.

8. The cover assembly according to any one of claims 1 to 7, characterized in that, The length L1 of the first sealing lip (61) is greater than the length L2 of the second sealing lip (62).

9. The cover assembly according to claim 8, characterized in that, The length L1 of the first sealing lip (61) is in the range of 7.5mm≤L1≤10.5mm, and the length L2 of the second sealing lip (62) is in the range of 4mm≤L2≤8mm.

10. The cover assembly according to claim 2, characterized in that, The limiting portion includes a first limiting lip (63) and a second limiting lip (64). The first limiting lip (63) is sandwiched between the second annular limiting protrusion (11) and the limiting ring (52). A receiving recess (65) for receiving the limiting ring (52) is formed between the first limiting lip (63) and the second limiting lip (64).

11. The cover assembly according to claim 10, characterized in that, The first limiting lip (63) is sealed to the inner side of the first annular limiting protrusion (51), and / or the second limiting lip (64) is inclined upward and sealed to the inner side of the second annular limiting protrusion (11).

12. The cover assembly according to claim 10, characterized in that, The second annular limiting protrusion (11) and the first annular limiting protrusion (51) are misaligned, and the bottom of the second annular limiting protrusion (11) is located between the top of the first annular limiting protrusion (51) and the limiting ring (52).

13. The cover assembly according to any one of claims 2 to 6, characterized in that, The cover (10) is provided with a downward protruding recessed platform (12), which is located inside the second annular limiting protrusion (11). The baking assembly (20) is located at the recessed platform (12). The recessed platform (12) includes a base plate (121) and a side plate (122) connected to the outer periphery of the base plate (121). The base plate (121) and the side plate (122) are both provided with ventilation holes (13).

14. The cover assembly according to claim 13, characterized in that, The height of the recessed platform (12) is greater than the height of the second annular limiting protrusion (11).

15. The cover assembly according to claim 1, characterized in that, The cover assembly further includes a connecting assembly (70), which includes a fixing part (71) passing through the cover (10) and a connecting part (72) passing through the sealing cover (50), wherein the connecting part (72) is plugged into the fixing part (71).

16. The cover assembly according to claim 1, characterized in that, The air passage (53) is located outside the first annular limiting protrusion (51).

17. The cover assembly according to any one of claims 1 to 7, characterized in that, The baking assembly (20) includes a cover (21), a heating element (22), a fan blade (23), and a motor assembly (24) for driving the fan blade (23) to rotate. The cover (21) is disposed above the cover (10) and fits against the cover (10). The middle part of the cover (21) protrudes upward to form a receiving space (25) between the cover (21) and the cover (10). The heating element (22) and the fan blade (23) are both disposed in the receiving space (25). The motor assembly (24) is disposed above the cover (21). The cover assembly also includes a faceplate (90) which covers the snap cover (10) and the baking assembly (20).

18. A cooking appliance, comprising a pot body and a lid assembly disposed on the pot body, characterized in that, The cover assembly is the cover assembly according to any one of claims 1 to 17.

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