Sealing ring structure, cover assembly and cooking utensil

Abstract

The application provides a sealing ring structure, a cover assembly and a cooking utensil, wherein the sealing ring structure comprises: an annular main body part; a first lip connected to the inner side of the annular main body part, the first lip comprising a first arc-shaped extension section and an oblique extension section, the first arc-shaped extension section being located between the annular main body part and the oblique extension section, the center of the arc of the first arc-shaped extension section being located below the annular main body part, the lower surface of the first arc-shaped extension section forming an interference fit area, and the oblique extension section extending downwardly and obliquely, the included angle between the oblique extension section and the vertical direction being between 15° and 23°. The technical scheme of the application can effectively solve the problem in the related art that the adhesion of the pot opening cannot be weakened to affect the user experience under the condition of ensuring good sealing.

Description

Technical Field

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

[0002] like Figure 1 As shown, in related technologies, the cross-section of the sealing ring 1 used in cooking appliances such as electric pressure cookers is "V" shaped, and the R angle at the assembly point with the inner pot is generally consistent with the R angle at the mouth of the inner pot, so as to achieve a complete fit with the mouth of the inner pot and avoid air leakage.

[0003] Although the pot rim sealing ring 1 in the related technology can achieve a good sealing effect, since the pot rim sealing ring 1 and the inner pot are completely fitted together, even under conditions where the pressure inside and outside the pot are almost the same, when the user opens the lid, the inner pot will be pulled out along with the lid, which is the pot rim adhesion phenomenon, resulting in a poor user experience.

[0004] Therefore, how to reduce the impact of pot rim adhesion on user experience while ensuring a good seal is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The main objective of this invention is to provide a sealing ring structure, a lid assembly, and a cooking appliance to solve the problem in related technologies that it is impossible to reduce the impact of pot rim adhesion on the user experience while ensuring a good seal.

[0006] To achieve the above objectives, according to one aspect of the present invention, a sealing ring structure for a cooking utensil is provided, comprising: an annular body portion; a first lip connected to the inner side of the annular body portion, the first lip including a first arcuate extension and an oblique extension, the first arcuate extension being located between the annular body portion and the oblique extension, the arc center of the first arcuate extension being located below the annular body portion, the lower surface of the first arcuate extension forming an interference fit area, the oblique extension extending downward at an angle between the oblique extension and the vertical direction being between 15° and 23°.

[0007] The technical scheme of the present application is applied, the first lip edge comprises a first arc-shaped extension section and an oblique extension section, wherein the lower surface of the first arc-shaped extension section forms an interference fit area, so that the first arc-shaped extension section can form a close surface seal with the pot body structure, ensuring the sealing effect. The oblique extension section is connected to one end of the first arc-shaped extension section away from the annular main body portion, and the included angle between the oblique extension section and the vertical direction is between 15° and 23°. In this way, after the cooking utensil completes pressure relief, the oblique extension section can rebound under its own elasticity and separate from the pot body structure, so that a larger gap structure can be formed between the oblique extension section and the pot body structure, thereby allowing gas to flow more smoothly between the first lip edge and the pot body structure and reducing the travel distance of the gas passing through the first lip edge and the pot body structure, so that the sealing ring structure and the pot body structure can be quickly separated. In this way, during the uncapping process, the pot body structure will not be taken out together with the cover assembly, improving the user's experience. Therefore, the technical scheme of the present application can effectively solve the problem in the related art that the pot opening adhesion phenomenon cannot be weakened while ensuring good sealing, which affects the user's experience.

[0008] Further, the central angle of the first arc-shaped extension section is between 35° and 55°; and / or, the radius of the first arc-shaped extension section is between 3mm and 5mm. In this way, the inner end of the first arc-shaped extension section has a tendency to extend downward and inward, thereby allowing the oblique extension section connected to the inner end of the first arc-shaped extension section to extend downward and inward, and thereby allowing the included angle between the oblique extension section and the vertical direction to meet the above requirements. The smaller radius of the first arc-shaped extension section allows the first arc-shaped extension section to form an interference fit with the pot body structure, thereby ensuring the sealing effect of the sealing ring structure.

[0009] Further, the oblique extension section comprises a second arc-shaped extension section, and the center of the second arc-shaped extension section is located below the first arc-shaped extension section. This arrangement allows the first lip edge to experience less tearing stress, thereby improving the first lip edge's resistance to damage and extending its service life.

[0010] Further, the radius of the second arc-shaped extension section is between 13mm and 17mm. By reasonably setting the radius of the second arc-shaped extension section, the sealing effect of the sealing ring structure and the anti-pot opening adhesion performance can be considered, improving the user's experience.

[0011] Further, the central angle of the second arc-shaped extension section is between 25° and 35°. By reasonably setting the radius of the second arc-shaped extension section and the central angle of the second arc-shaped extension section, the sealing effect of the sealing ring structure and the anti-pot opening adhesion performance can be considered, improving the user's experience.

[0012] Further, the sealing ring structure further comprises a second lip connected to the inner side of the annular main body portion for sealing cooperation with the pot cover, wherein the second lip has the same structure as the first lip. When installing the sealing ring structure, the user does not need to consider the front and back, especially for the scenario that the sealing ring structure can be disassembled, and the user will not install it incorrectly.

[0013] Further, the sealing ring structure further comprises a protruding rib arranged on the inner side of the first lip. The arrangement of the protruding rib can increase the structural strength of the first lip and ensure the safety performance in the pressure cooking process.

[0014] Further, the included angle between the bisector of the second arc-shaped extension segment and the bisector of the protruding rib is between 3° and 7°. The included angle between the two bisectors in the above range can effectively improve the safety in the pressure cooking process.

[0015] Further, the sealing ring structure further comprises a plurality of convex edge portions connected to the outer side of the annular main body portion. The convex edge portions can be inserted into the through holes on the pot cover to fix the sealing ring structure on the pot cover.

[0016] According to another aspect of the present application, a cover assembly is provided, comprising a pot cover and a sealing ring structure installed on the pot cover, wherein the sealing ring structure is the above-mentioned sealing ring structure. The above-mentioned sealing ring structure can effectively solve the problem that in the related art, the influence of the pot mouth adhesion phenomenon on the user's use experience cannot be weakened while ensuring good sealing, and the cover assembly with the above-mentioned sealing ring structure also has the above-mentioned advantages.

[0017] According to another aspect of the present application, a cooking appliance is provided, comprising a pot body structure and a cover assembly which is openably and closably arranged above the pot body structure, wherein the cover assembly is the above-mentioned cover assembly. The above-mentioned cover assembly can effectively solve the problem that in the related art, the influence of the pot mouth adhesion phenomenon on the user's use experience cannot be weakened while ensuring good sealing, and the cooking appliance with the above-mentioned cover assembly also has the above-mentioned advantages.

[0018] Further, the pot body structure comprises a pot body, a flange, and an arc-shaped transition segment connected between the pot body and the flange, wherein the radius of the arc-shaped transition segment is greater than the radius of the first arc-shaped extension segment of the sealing ring structure. By making the radius of the arc-shaped transition segment greater than the radius of the first arc-shaped extension segment of the sealing ring structure, the first arc-shaped transition segment can be made to have an interference fit with the pot body structure while achieving smooth transition of the first arc-shaped extension segment and the obliquely extending segment, thereby ensuring the sealing effect.

[0019] Further, the sealing ring structure of the cover assembly has an initial state and an upper pressing state, in the initial state, an interference amount between the first lip of the sealing ring structure and the pot body structure is between 0.4mm and 0.5mm; and / or, a length of the first lip of the sealing ring structure and the pot body structure is between 4mm and 8mm. The interference amount in the above range can ensure reliable sealing between the first lip and the pot body structure, and can also compensate for the machining error of the pot body structure. The length in the above range makes the first lip and the pot body structure have sufficient contact area, which can ensure the sealing effect between them. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the description, explain the application. In the drawings:

[0021] Figure 1 A sectional view of a cooking utensil in the related art is shown at the mouth of the inner pot;

[0022] Figure 2 A sectional view of an embodiment of the sealing ring structure according to the present application is shown;

[0023] Figure 3 An enlarged view of A of the sealing ring structure of Figure 2 is shown;

[0024] Figure 4 A structural diagram of the first lip of the sealing ring structure of Figure 2 is shown;

[0025] Figure 5 A sectional view of a part of the structure of an embodiment of the cooking utensil according to the present application is shown;

[0026] Figure 6 A force analysis diagram of the pot mouth sealing ring in the related art and the sealing ring structure in the embodiment of the present application is shown.

[0027] Among them, the above drawings include the following reference signs:

[0028] 1, pot mouth sealing ring; 10, pot body structure; 11, pot body main body; 12, flange; 13, arc-shaped transition section; 20, pot cover; 30, annular main body part; 40, first lip; 41, first arc-shaped extension section; 42, second arc-shaped extension section; 50, second lip; 60, protruding rib; 70, protruding edge part;

[0029] a, included angle between the obliquely extending section and the vertical direction; b, included angle between the bisector of the second arc-shaped extension section and the bisector of the protruding rib;

[0030] R1, radius of the first arcuate extension; R2, radius of the second arcuate extension; R3, radius of the arcuate transition; R4, radius of the convex rib;

[0031] L1, bisector of the second arcuate extension; L2, bisector of the convex rib. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0033] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0034] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth herein are not limiting. It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the present application. In all examples shown and discussed herein, any specific value should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0035] As Figures 2 to 5As shown, the sealing ring structure of the cooking utensil provided in the present application comprises a ring-shaped main body part 30 and a first lip 40. The first lip 40 is connected to the inner side of the ring-shaped main body part 30. The first lip 40 comprises a first arc-shaped extension section 41 and an oblique extension section. The first arc-shaped extension section 41 is located between the ring-shaped main body part 30 and the oblique extension section. The center of the arc of the first arc-shaped extension section 41 is located below the ring-shaped main body part 30. The lower surface of the first arc-shaped extension section 41 forms an interference fit area. The oblique extension section extends downwardly and obliquely. The included angle a between the oblique extension section and the vertical direction is between 15° and 23°.

[0036] By applying the technical solution of the present embodiment, the first lip 40 comprises the first arc-shaped extension section 41 and the oblique extension section. The lower surface of the first arc-shaped extension section 41 forms an interference fit area, so that the first arc-shaped extension section 41 can form a close surface seal with the pot body structure 10, thereby ensuring the sealing effect. The oblique extension section is connected to the end of the first arc-shaped extension section 41 away from the ring-shaped main body part 30. The included angle a between the oblique extension section and the vertical direction is between 15° and 23°. When the cooking utensil completes pressure relief, the oblique extension section can rebound under its own elasticity and separate from the pot body structure 10, so that a larger gap structure can be formed between the oblique extension section and the pot body structure 10. In this way, the gas can more smoothly enter between the first lip 40 and the pot body structure 10, and the travel distance of the gas passing through the first lip 40 and the pot body structure 10 is smaller. The sealing ring structure and the pot body structure 10 can be quickly separated. In this way, the pot body structure 10 will not be taken out together with the cover assembly during the process of opening the cover, thereby improving the user experience. Therefore, the technical solution of the present embodiment can effectively solve the problem in the related art that the pot mouth adhesion phenomenon cannot be weakened while ensuring good sealing, thereby affecting the user experience.

[0037] Specifically, in the present embodiment, the sealing ring structure is clamped between the pot body structure 10 and the pot cover 20 of the cooking utensil. The first lip 40 can be sealingly fitted with the pot body structure 10.

[0038] As shown in Figure 3 and Figure 4 The "center of the arc of the first arc-shaped extension section 41" refers to the center of the circle in which the first arc-shaped extension section 41 is located.

[0039] In the description of the embodiments of the present application, the positional words "upper" and "lower" refer to the "upper" and "lower" when the cooking utensil is placed flat on a support platform and the sealing ring structure is in cooperation with the pot body structure 10. That is Figures 2 to 5"up" and "down" in the drawings are directions or orientations relative to the drawings; and the orientation terms "inner" and "outer" are relative to the sealing ring structure itself, wherein "inner" is closer to the vertical axis of the sealing ring structure, and "outer" is farther away from the vertical axis of the sealing ring structure.

[0040] As shown in the drawings, Figure 4 In the present embodiment, the included angle a between the oblique extension section and the vertical direction is between 15° and 23°, which can ensure the sealing effect between the first lip 40 and the pot body structure 10, and avoid air leakage during the pressing process. At the same time, it can also avoid the contact area between the first lip 40 and the pot body structure 10 being too large, ensure the anti-pot opening adhesion effect, and make the friction between the first lip 40 and the pot body structure 10 smaller during the opening and closing process to ensure the hand feeling of opening and closing the lid and improve the user's experience. Preferably, the included angle a between the oblique extension section and the vertical direction is in the range of 16° to 18°. Specifically, the included angle a can be 16°, 17° or 18°.

[0041] It should be noted that in the present embodiment, the first arc-shaped extension section 41 is tangent to the oblique extension section. The sealing ring structure is made of silica gel material.

[0042] In the present embodiment, the central angle of the first arc-shaped extension section 41 is between 35° and 55°. In this way, the inner end of the first arc-shaped extension section 41 has a tendency to extend downward and inward, and thus the oblique extension section connected to the inner end of the first arc-shaped extension section 41 can extend downward and inward, and thus the included angle a between the oblique extension section and the vertical direction can meet the above requirements. Preferably, the central angle of the first arc-shaped extension section 41 is in the range of 35° to 37°. Specifically, the central angle of the first arc-shaped extension section 41 can be 35°, 36° or 37°.

[0043] As shown in the drawings, Figure 3 The radius R1 of the first arc-shaped extension section 41 is between 3mm and 5mm. The smaller radius R1 of the first arc-shaped extension section 41 enables the first arc-shaped extension section 41 to form an interference fit with the pot body structure 10, thereby ensuring the sealing effect of the sealing ring structure. Preferably, the radius R1 of the first arc-shaped extension section 41 is in the range of 3mm to 3.5mm. Specifically, the radius R1 of the first arc-shaped extension section 41 can be 3mm, 3.25mm or 3.5mm.

[0044] As shown in the drawings, Figures 2 to 5As shown, the oblique extension section includes a second arc-shaped extension section 42, the center of which is located below the first arc-shaped extension section 41. Compared to the straight extension structure, when the second arc-shaped extension section 42 is pressed against the side wall of the pot body structure 10 by the pressure inside the pot body structure 10, the tearing stress on the inner surface of the first lip edge 40 is smaller, thus giving the first lip edge 40 stronger resistance to damage and a longer service life.

[0045] like Figure 3 As shown, the radius R2 of the second arc-shaped extension 42 is between 13mm and 17mm, and the central angle of the second arc-shaped extension 42 is between 25° and 35°. By reasonably setting the radius R2 and the central angle of the second arc-shaped extension 42, the sealing effect of the sealing ring structure and the anti-sticking performance of the pot rim can be balanced, so that the sealing ring structure has sufficient sealing capacity while avoiding excessive safety pressure, ensuring safety during cooking; at the same time, the angle α between the oblique extension and the vertical direction can be within the above-mentioned range, making it convenient for users to open the lid. Preferably, the radius R2 of the second arc-shaped extension 42 is between 14mm and 16mm, specifically, the radius R2 of the second arc-shaped extension 42 can be 14mm, 15mm, or 16mm; the central angle of the second arc-shaped extension 42 is between 28° and 32°, specifically, the central angle of the second arc-shaped extension 42 can be 28°, 30°, or 32°.

[0046] The following combination Figure 6 An analysis is performed on the pot-mouth sealing ring in the related technology and the sealing ring structure in the embodiments of the application. Wherein, (a) is... Figure 1 The force analysis diagram of the lower lip of the sealing ring at the pot opening is shown in (a). Figure 2 and Figure 3 The force analysis diagram of the first lip 40 of the sealing ring structure is shown in the figure. Fx is the pressure of the internal gas of the pot structure, Fy is the total weight of the pot structure and its contents, F1 is the resultant force on the sealing ring of the pot mouth, and F2 is the resultant force on the sealing ring structure.

[0047] pass Figure 6 It can be seen that, due to Figure 1 The contact area between the sealing ring at the pot opening and the pot body structure is relatively large, and correspondingly, its Fx is also larger; in addition, due to Figure 1 The lower lip of the sealing ring at the pot opening has a vertical extension section, and its Fx is a lateral force. In this embodiment, since the contact area between the first lip 40 and the pot body structure 10 is small, its Fx is even smaller, and the first lip 40 is in contact with the pot body structure 10 through the upper ends of the first arc-shaped extension section 41 and the second arc-shaped extension section 42, its Fx extends to the lower left.

[0048] Compared to Figure 1The force F2 of the embodiment is greater in the vertical direction and smaller in the horizontal direction (i.e., the friction between the first lip 40 and the pot body structure 10 is smaller), so the first lip 40 is more easily separated from the pot body structure 10.

[0049] Specifically, the following describes the parameters in the cooperation between the sealing ring structure and the pot body structure 10 in combination with a preferred embodiment (Embodiment One) of the present application.

[0050] In Embodiment One of the present application:

[0051] In the embodiment, the radius R1 of the first arc-shaped extension 41 is 3.25 mm, and the central angle of the first arc-shaped extension 41 is 36°; the angle a between the oblique extension and the vertical direction is 17°; the radius R2 of the second arc-shaped extension 42 is 15 mm, and the central angle of the second arc-shaped extension 42 is 30°; and the radius R3 of the arc-shaped transition section 13 of the pot body structure 10 is 5 mm.

[0052] In the embodiment, the arc length l1 of the pot body structure 10 (i.e., the longitudinal arc length of the arc-shaped transition section) is 7.8 mm, and the arc area S1 is approximately 5180 mm 2 = 51.8 cm 2 (the arc area is calculated by the formula S = (90-a) x R x r1 x π / 360, where a is the angle between the oblique extension and the vertical direction, R is the average diameter of the first lip 40, and r1 is the fillet radius of the pot body structure 10);

[0053] The arc length l2 of the first lip 40 is 10 mm, and the arc area S2 is approximately 6900 mm 2 = 69 cm 2 .

[0054] The fitting length l 2-1 of the first lip 40 and the pot body structure 10 after the sealing ring structure is assembled on the pot body structure 10 is 5.9 mm, and the fitting arc area S 2-1 is approximately 4100 mm 2 = 41 cm 2；

[0055] With a load Wp of 1 kg per square centimeter of atmospheric pressure (the pressure in the pot body structure 10 after pressure relief is similar to the atmospheric pressure), and a friction coefficient μ of the inner surface of the pot body structure 10 of approximately 0.4, the static friction force F 2-1 experienced by the first lip 40 and the pot body structure 10 in the vertical direction after complete fitting is F 2-1 = Wp x S x sin 27° x μ x g = 74 N.

[0056] And in the embodiment: Figure 1 ​

[0057] The arc length l3 of the lower lip is 10.4 mm, and the fitting area S3 between the lower lip and the pot body structure is approximately 7200 mm 2 = 72 cm 2 ;

[0058] After the assembled lower lip is completely fitted with the pot body structure, the static friction F3 in the vertical direction is 216 N.

[0059] Through the above analysis, it can be seen that Figure 1 The static friction of the pot opening sealing ring in the prior art is much larger than that of the sealing ring structure in the embodiment, wherein F3 has far exceeded the total weight of the pot body structure and its contents, and F 2-1 is approximately the total weight of the pot body structure 10 and its contents. In this case, due to the existence of the included angle a, when the pot body structure 10 is lifted during the cover opening process, the root of the included angle a is pulled, further rapidly reducing the fitting area, and the contact pot opening sticking phenomenon.

[0060] Through the above calculation method, the force calculation, sealing effect analysis and anti-pot opening sticking effect analysis of the sealing ring structure with other parameters are as follows:

[0061]

[0062] From the above table, it can be seen that when the parameters of the sealing ring structure fall within the range defined in the application, the sealing ring structure has good sealing effect and anti-pot opening sticking effect. When the parameters of the sealing ring structure fall outside the range defined in the application, it cannot meet the sealing requirement and anti-pot opening sticking requirement at the same time.

[0063] As shown in Figures 2 to 3 , the sealing ring structure further includes a second lip 50 connected to the inner side of the annular main body 30 for sealing cooperation with the pot cover 20, wherein the second lip 50 has the same structure as the first lip 40. When installing the sealing ring structure, there is no need to consider the front and back, especially for the scenario where the sealing ring structure can be disassembled, the user will not install it incorrectly.

[0064] Of course, in the embodiment not shown in the figure, the structure of the second lip and the first lip can also be different, for example, the second lip has the same extension trend as the pot cover, so that the second lip can be tightly fitted with the pot cover whether it is pressed or not, avoiding food and the like entering the gap between the second lip and the pot cover, and being more sanitary.

[0065] As shown in Figures 2 to 4As shown, the sealing ring structure further comprises a protruding rib 60 arranged inside the first lip 40. The arrangement of the protruding rib 60 can increase the structural strength of the first lip 40, and ensure the safety performance in the pressure cooking process.

[0066] Specifically, the protruding rib can be a ring-shaped protruding rib or a multi-segment protruding rib structure arranged along the circumferential direction of the first lip.

[0067] As shown in the drawings, Figure 3 As shown, the radius R4 of the protruding rib 60 is between 1 mm and 5 mm. Preferably, the radius R4 of the protruding rib 60 can be 2 mm, 3 mm or 4 mm. The radius R4 of the protruding rib 60 in the above range can effectively improve the safety in the pressure cooking process.

[0068] As shown in the drawings, Figure 4 As shown, the included angle b between the bisector L1 of the second arc-shaped extension segment 42 and the bisector L2 of the protruding rib 60 is between 3° and 7°. It should be noted that the "bisector" mentioned above refers to a line that can divide the arc-shaped segment into two identical arc-shaped segment structures, that is, a line passing through the center of the arc-shaped segment and the midpoint of the arc-shaped segment. Preferably, the included angle between the two bisectors can be 3°, 5° or 7°. The included angle b in the above range can effectively improve the safety in the pressure cooking process.

[0069] As shown in the drawings, Figure 2 and Figure 5 As shown, the sealing ring structure further comprises a plurality of protruding edge portions 70 connected to the outside of the annular main body portion 30. Specifically, the cross section of the protruding edge portion 70 is "T" shaped, which can be inserted into the through hole on the pot cover 20 to fix the sealing ring structure on the pot cover 20.

[0070] In the embodiment, the first lip 40 is composed of two arc-shaped extension segments, of course, in the embodiment not shown in the drawings, the first lip can also be composed of more arc-shaped extension segments, which can better control the gap angle and the fitting length between the first lip and the pot body structure, so as to realize the faster separation of the first lip from the pot body structure.

[0071] As shown in the drawings, Figure 5 As shown, the present application also provides a cover assembly comprising a pot cover 20 and a sealing ring structure mounted on the pot cover 20, wherein the sealing ring structure is the sealing ring structure described above. The sealing ring structure described above can effectively solve the problem in the related art that the adhesion of the pot opening cannot be weakened to affect the user's experience while ensuring good sealing, and the cover assembly with the sealing ring structure also has the advantages described above.

[0072] In the embodiment, the cover assembly further comprises a face cover, a pressure limiting valve, a non-return valve and the like, the pot cover 20 is arranged below the face cover, and the pressure limiting valve and the non-return valve are arranged through the face cover and the pot cover 20.

[0073] Of course, in an embodiment not shown in the drawings, the cover assembly can not include the face cover.

[0074] As shown in Figure 5 The present application also provides a cooking utensil, which comprises a pot body structure 10 and a cover assembly arranged above the pot body structure 10 in an openable and closable manner, wherein the cover assembly is the cover assembly described above. The cover assembly described above can effectively solve the problem in the related art that the adhesion of the pot opening cannot be weakened to affect the user experience while ensuring good sealing, and the cooking utensil with the cover assembly described above also has the advantages described above.

[0075] As shown in Figure 5 The pot body structure 10 comprises a pot body 11, a flange 12, and an arc-shaped transition section 13 connected between the pot body 11 and the flange 12, wherein the radius R3 of the arc-shaped transition section 13 is greater than the radius R1 of the first arc-shaped extension section 41 of the sealing ring structure. By making the radius R3 of the arc-shaped transition section 13 greater than the radius R1 of the first arc-shaped extension section 41, the first arc-shaped transition section 13 can be in interference fit with the pot body structure 10 while achieving smooth transition between the first arc-shaped extension section 41 and the obliquely extending section, thereby ensuring the sealing effect.

[0076] Specifically, in the present embodiment, the radius R3 of the arc-shaped transition section 13 is between 4.5 mm and 6 mm. Preferably, the radius R3 of the arc-shaped transition section 13 can be 5 mm or 6 mm.

[0077] Specifically, the sealing ring structure of the cover assembly has an initial state and an upper pressing state. In the initial state, the interference amount between the first lip 40 of the sealing ring structure and the pot body structure 10 is between 0.4 mm and 0.5 mm. It should be noted that the "initial state" described above refers to the state in which the pot body structure 10 is not pressed and the sealing ring structure is only pressed on the pot body structure 10 under the action of gravity of the cover assembly; the "upper pressing state" described above refers to the state in which the internal pressure of the pot body structure 10 rises after heating and lifts the stop valve. In the initial state, the interference amount between the first lip 40 of the sealing ring structure and the pot body structure 10 is between 0.4 mm and 0.5 mm, which can ensure reliable sealing between the first lip 40 and the pot body structure 10. In addition, since the first lip 40 of the sealing ring structure has a large interference amount with the pot body structure 10, even if the pot body structure 10 has a certain machining error, the first lip 40 has a certain extrusion area with the pot body structure 10, which ensures the sealing effect. Preferably, in the initial state, the interference amount between the first lip 40 of the sealing ring structure and the pot body structure 10 is between 0.45 mm and 0.5 mm, and specifically, the interference amount therebetween can be 0.45 mm or 0.5 mm.

[0078] In the initial state, the first lip 40 of the sealing ring structure is in contact with the pot body structure 10 by a length of 4-8mm. That is, in the initial state, the first lip 40 has sufficient contact area with the pot body structure 10 to ensure the sealing effect between them. Preferably, in the initial state, the first lip 40 is in contact with the pot body structure 10 by a length of 5.5-6.5mm. Specifically, the length of contact between them can be 5.5mm, 5.9mm or 6.5mm.

[0079] In the present embodiment, since the first lip 40 has a certain interference with the pot body structure 10 and a length of contact, even during the pressing process, air leakage is not easy to occur, thereby enabling the pressure in the pot body structure 10 to rise quickly.

[0080] In the present embodiment, the cooking appliance is a pressure cooking appliance. Of course, in an embodiment not shown in the figure, the cooking appliance can also be an electric rice cooker, a low-pressure rice cooker, a soybean milk machine, a food processor, a frying machine, an electric stew pot, a multifunctional pot, etc.

[0081] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and in the absence of contrary description, these orientation words do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0082] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0083] In addition, it should be noted that the use of "first", "second", and the like words to qualify parts is merely for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0084] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art based on the principles and spirit of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A seal ring structure of a cooking appliance, characterized by, The sealing ring structure comprises: a ring-shaped main body (30); a first lip (40) connected to the inner side of the ring-shaped main body (30), the first lip (40) comprising a first arc-shaped extension (41) and an oblique extension, the first arc-shaped extension (41) being located between the ring-shaped main body (30) and the oblique extension, the center of the arc of the first arc-shaped extension (41) being located below the ring-shaped main body (30), the lower surface of the first arc-shaped extension (41) forming an interference fit area, the oblique extension extending downwardly and obliquely, the included angle (a) between the oblique extension and the vertical direction being between 15° and 23°; the oblique extension comprises a second arc-shaped extension (42), the center of the arc of the second arc-shaped extension (42) being located below the first arc-shaped extension (41).

2. The seal ring structure of claim 1, wherein The central angle of the first arc-shaped extension (41) is between 35° and 55°; and / or, the radius (R1) of the first arc-shaped extension (41) is between 3mm and 5mm.

3. The seal ring structure of claim 1, wherein The radius (R2) of the second arc-shaped extension (42) is between 13mm and 17mm.

4. The seal ring structure of claim 1, wherein The central angle of the second arc-shaped extension (42) is between 25° and 35°.

5. The seal ring structure according to any one of claims 1 to 4, characterized in that, The sealing ring structure further comprises a second lip (50) connected to the inner side of the ring-shaped main body (30) for sealing fit with the pot cover, wherein the second lip (50) has the same structure as the first lip (40).

6. The seal ring structure according to any one of claims 1 to 4, characterized in that, The sealing ring structure further comprises a protruding rib (60) arranged inside the first lip (40).

7. The seal ring structure of claim 6, wherein The included angle (b) between the bisector (L1) of the second arc-shaped extension (42) and the bisector (L2) of the protruding rib (60) is between 3° and 7°.

8. The seal ring structure of any one of claims 1 to 4, wherein The sealing ring structure further comprises a plurality of protruding edge portions (70) connected to the outer side of the ring-shaped main body (30).

9. A lid assembly comprising a pot lid (20) and a seal ring structure mounted on the pot lid (20), characterized in that, The sealing ring structure is any one of claims 1-8.

10. A cooking appliance comprising a pot structure (10) and a lid assembly openably disposed above the pot structure (10), characterized in that, The cover assembly is the cover assembly of claim 9.

11. The cooking appliance of claim 10, wherein, The pot body structure (10) comprises a pot body (11), a flange (12), and an arc-shaped transition section (13) connected between the pot body (11) and the flange (12), wherein the radius (R3) of the arc-shaped transition section (13) is greater than the radius (R1) of the first arc-shaped extension (41) of the sealing ring structure.

12. The cooking appliance of claim 10, wherein, The sealing ring structure of the cover assembly has an initial state and a pressed state, in the initial state, The interference amount between the first lip (40) of the sealing ring structure and the pot body structure (10) is between 0.4mm and 0.5mm; and / or, The length of the fit between the first lip (40) of the sealing ring structure and the pot body structure (10) is between 4mm and 8mm.

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