Sealing ring structure, cover body assembly and cooking utensil

Abstract

The utility model provides a sealing ring structure, a cover body assembly and a cooking utensil, the sealing ring structure comprises a ring body main body, the lower surface of the ring body main body forms a support plane; the lower sealing lip edge is connected to the inner side of the ring body main body and extends downwards, the lower sealing lip edge comprises a curved surface section connected with the ring body main body and an inclined straight surface section connected to the lower end of the curved surface section, the curved surface section is provided with a concave surface facing the outer side of the ring body main body, and the inclined straight surface section extends towards the inner side of the ring body main body. According to the technical scheme, the problem that the sealing effect and the anti-adsorption effect of the sealing ring structure are difficult to consider in the related technology can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to small household electrical appliances technical field, specifically, relate to a sealing ring structure, cover body subassembly and cooking utensil. BACKGROUND

[0002] In the related art, in order to ensure that pressure cooking utensil can be smoothly pressed and keep higher cooking pressure, sealing ring structure is arranged on cover body subassembly and pot body subassembly.

[0003] In order to ensure the sealing ability of sealing ring structure, so that sealing ring structure can be used for pressure cooking, the contact area of sealing ring structure and pot opening position can be increased. However, such setting although meets the sealing demand, when the pressure in cooking cavity is reduced to the degree of atmospheric pressure after completing cooking, the sealing ring is still adsorbed at the pot opening, which affects the hand feeling of user when opening the cover, and the user may even take the pot body out of the pot body subassembly or take it to a certain height when opening the cover.

[0004] In order to avoid the phenomenon that sealing ring structure adsorbs pot body after cooking, some sealing ring structures are provided with exhaust part or abutting part with small contact area with pot opening on the outer surface of sealing ring, which can effectively avoid that sealing ring structure is adsorbed at the pot opening, but the sealing effect is relatively poor, and the problem of incomplete sealing in the process of pressing cannot be avoided. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a sealing ring structure, cover body subassembly and cooking utensil, so as to solve the problem that sealing effect and anti-adsorption effect of sealing ring structure cannot be considered in the related art.

[0006] In order to achieve the above purpose, according to one aspect of the utility model, a sealing ring structure is provided, which comprises: a ring body main body, the lower surface of the ring body main body forms a supporting plane; a lower sealing lip is connected to the inner side of the ring body main body and extends downward, the lower sealing lip comprises a curved surface section connected with the ring body main body and an inclined straight surface section connected with the lower end of the curved surface section, the curved surface section has a concave surface towards the outer side of the ring body main body, and the inclined straight surface section extends towards the inner side of the ring body main body.

[0007] The technical scheme of the utility model discloses a sealing ring structure, which comprises a ring body and a lower sealing lip, the support plane on the ring body can be supported and cooperated with the support structure on the pot body, the lower surface of the curved section of the lower sealing lip can be supported and cooperated with the transition arc surface on the pot body, thereby ensuring that the sealing ring structure and the pot body have sufficient sealing area under the condition of no pressure or during the process of being pressed, avoiding the situation of air leakage and ensuring the sealing effect; when the pressure in the cooking cavity increases to a certain degree, the inclined straight section is pressed and abuts against the inner surface of the pot body, further increasing the sealing area between the sealing ring structure and the pot body; after the cooking is completed and the pressure in the sealing cavity decreases, the inclined straight section will be separated from the pot body under the action of its own elastic force and reset to the state of extending downward, thereby reducing the abutting area between the sealing ring structure and the pot body and weakening or even avoiding the adsorption phenomenon during the process of opening the cover, improving the opening feeling of the user.

[0008] Further, the preset included angle between the inclined straight section and the vertical direction is greater than or equal to 15° and less than or equal to 35°. The preset included angle is within the above range, which can ensure that the inclined straight section and the pot body have sufficient clearance for the gas in the cooking cavity to enter after the cooking is completed and the pressure in the sealing cavity decreases, thereby weakening or even avoiding the adsorption phenomenon; meanwhile, the service life of the lower sealing lip can be ensured.

[0009] Further, the support plane is tangent to the lower surface of the curved section; and / or, the lower surface of the inclined straight section is tangent to the lower surface of the curved section. The above arrangement can improve the mechanical properties of the sealing ring structure and reduce stress concentration during the stress deformation of the sealing ring structure.

[0010] Further, the size of the support plane in the radial direction of the ring body is greater than or equal to 2mm and less than or equal to 3mm. The size of the support plane in the radial direction of the ring body within the above range can ensure the fitting area between the sealing ring structure and the pot body under the condition of no pressure.

[0011] Further, the longitudinal section of the curved section is in an arc structure, wherein the central angle of the curved section is greater than or equal to 55° and less than or equal to 75°; and / or, the arc length of the curved section is greater than or equal to 5mm and less than or equal to 10mm. By controlling the size of the central angle of the curved section, the angle of the inclined straight section relative to the vertical direction can be controlled, thereby ensuring the anti-adsorption effect during the process of opening the cover. By letting the arc length of the curved section be within the above range, the sealing area between the sealing ring structure and the pot body under the condition of no pressure can be ensured.

[0012] Further, the size of the inclined straight surface section in the extending direction is greater than or equal to 2.5 mm and less than or equal to 4 mm. By setting the size of the inclined straight surface section in the extending direction within the above range, the sealing area between the sealing ring structure and the pot body after the upper pressing can be increased, while ensuring that the pressure relief pressure value of the sealing ring structure is within the set range.

[0013] Further, the sealing ring structure further comprises a reinforcing protrusion arranged on the inner surface of the lower sealing lip, the reinforcing protrusion being located at the joint position of the curved surface section and the inclined straight surface section; and / or the sealing ring structure further comprises a hanging protrusion arranged on the outer side of the ring body main body and extending outward. The arrangement of the reinforcing protrusion can increase the structural strength and aging resistance of the lower sealing lip. The hanging protrusion can cooperate with the hanging port on the pot cover to realize the installation of the sealing ring structure on the pot cover.

[0014] 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 of difficult to balance the sealing effect and the anti-adsorption effect of the sealing ring structure in the related art, and the cover assembly with the above-mentioned sealing ring structure also has the above-mentioned advantages.

[0015] According to another aspect of the present application, a cooking appliance is provided, comprising a pot body assembly and a cover assembly which is openably and closably covered on the pot body assembly, wherein the cover assembly is the above-mentioned cover assembly. The above-mentioned cover assembly can effectively solve the problem of difficult to balance the sealing effect and the anti-adsorption effect of the sealing ring structure in the related art, and the cooking appliance with the above-mentioned cover assembly also has the above-mentioned advantages.

[0016] According to another aspect of the present application, a cooking appliance is provided, comprising a pot body assembly and a cover assembly which is openably and closably covered on the pot body assembly, wherein the cover assembly comprises a pot cover and a sealing ring structure installed on the pot cover, the sealing ring structure is the above-mentioned sealing ring structure, and the longitudinal section of the curved surface section of the sealing ring structure is an arc structure; the pot body assembly comprises a pot body, the pot body comprises a main body part and a turned-over edge part arranged on the upper end of the main body part and extending outward, the turned-over edge part and the main body part have a transition arc surface therebetween, the turned-over edge part is supported below the ring body main body and is in contact with the supporting plane, and the transition arc surface is supported below the curved surface section and is in contact with the lower surface of the curved surface section; wherein the radius of the lower surface of the curved surface section is greater than the radius of the transition arc surface, and the difference between the radius of the lower surface of the curved surface section and the radius of the transition arc surface is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. The radius of the lower surface of the curved surface section is slightly greater than the radius of the transition arc surface, so that in the state of no upper pressing and after the pressure in the cooking cavity decreases after the cooking is completed, the curved surface section and the transition arc surface are not completely in contact, but have a certain gap, thereby ensuring the anti-adsorption effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A perspective structural schematic view of an embodiment of the sealing ring structure according to the present application is shown;

[0019] Figure 2 A cross-sectional schematic view of a partial structure of the sealing ring structure of Figure 1 is shown;

[0020] Figure 3 A cross-sectional schematic view of a cooking utensil according to the present application is shown;

[0021] Figure 4 An enlarged view of A of the cooking utensil of Figure 3 is shown.

[0022] Among the above drawings, the following reference signs are included:

[0023] 10, ring body main body; 11, support plane;

[0024] 20, lower sealing lip; 21, curved surface section; 22, inclined straight surface section;

[0025] 30, reinforcing protrusion;

[0026] 40, hanging protrusion;

[0027] 50, pot cover;

[0028] 60, pot body; 61, main body portion; 62, turned-over edge portion; 63, transition curved surface;

[0029] 70, upper sealing lip;

[0030] a, preset included angle; L1, arc length of curved surface section; L2, dimension of inclined straight surface section in extension direction; L3, dimension of support plane in radial direction of ring body main body. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described 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 merely illustrative in nature and in no way should be taken as a limitation of the present application and applications or uses thereof. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0033] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale for the sake of convenience in description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the example 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.

[0034] As Figure 1 and Figure 2 The sealing ring structure provided by the present application includes a ring body main body 10 and a lower sealing lip 20. The lower surface of the ring body main body 10 forms a support plane 11. The lower sealing lip 20 is connected to the inner side of the ring body main body 10 and extends downward. The lower sealing lip 20 includes a curved section 21 connected to the ring body main body 10 and an inclined straight section 22 connected to the lower end of the curved section 21. The curved section 21 has a concave surface facing the outer side of the ring body main body 10. The inclined straight section 22 extends toward the inner side of the ring body main body 10.

[0035] According to the technical solution of the embodiment, the sealing ring structure comprises a ring body 10 and a lower sealing lip 20. The support plane 11 on the ring body 10 can be supported and matched with the support structure (specifically, the turned-over edge 62) on the pot body 60. The lower surface of the curved section 21 of the lower sealing lip 20 (i.e., the concave surface of the curved section 21) can be supported and matched with the transition curved surface 63 on the pot body 60, thereby ensuring that there is sufficient sealing area between the sealing ring structure and the pot body 60 in the un-pressing state or during the pressing process, avoiding the situation of air leakage, and ensuring the sealing effect. When the pressure in the cooking cavity increases to a certain degree, the inclined straight section 22 is pressed against the inner surface of the pot body 60, further increasing the sealing area between the sealing ring structure and the pot body 60. When the cooking is completed and the pressure in the sealing cavity decreases, the inclined straight section 22 will separate from the pot body 60 under the action of its own elastic force and reset to the state of extending downwardly, thereby reducing the abutting area between the sealing ring structure and the pot body 60, weakening or even avoiding the suction phenomenon during the opening process, and improving the opening feeling of the user. Therefore, the technical solution of the embodiment can effectively solve the problem of difficult to balance the sealing effect and anti-suction effect of the sealing ring structure in the related art.

[0036] In addition, when the inclined straight section 22 is pressed against the pot body 60 when the pressure in the cooking cavity increases to a certain degree, the outer surface of the inclined straight section 22 can be well fitted with the inner surface of the pot body 60, ensuring the sealing effect.

[0037] Specifically, in the embodiment, the ring body 10, the curved section 21 and the inclined straight section 22 are all annular structures.

[0038] It should be noted that, in the embodiment, the profile lines of the inner surface and the outer surface of the curved section 21 on the longitudinal section are curves; the profile lines of the inner surface and the outer surface of the inclined straight section 22 on the longitudinal section are straight lines. As shown in Figure 2 The curved section 21 has a concave surface facing the outer side of the ring body 10. Specifically, the opening of the concave surface faces the lower side of the outer side of the ring body 10.

[0039] As shown in Figure 1 and Figure 2As shown, the inclined straight section 22 has a preset angle α with the vertical direction, which is greater than or equal to 15° and less than or equal to 35°. Keeping the preset angle α within this range ensures that after cooking is complete and the pressure in the sealed cavity decreases, there is sufficient gap between the inclined straight section 22 and the pot body 60 to allow gas from the cooking cavity to enter, thus reducing or even preventing adsorption. Simultaneously, it minimizes the deformation of the inclined straight section 22 under pressure and during its reset process after the pressure disappears, thereby reducing the stress at the junction of the inclined straight section 22 and the curved section 21, ensuring the service life of the lower sealing lip 20. Preferably, the preset angle α can be 15°, 20°, 25°, 30°, or 35°.

[0040] In addition, the aforementioned preset angle setting can prevent excessive friction between the inclined straight section 22 and the pot opening of the pot body 60 during the opening and closing process, thus avoiding affecting the user's opening and closing feel.

[0041] It should be noted that the aforementioned preset angle α refers to the angle between the inclined straight section 22 and the vertical direction in the natural state (that is, when the inclined straight section 22 is not under pressure).

[0042] like Figure 2 As shown, the supporting plane 11 is tangent to the lower surface of the curved section 21; the lower surface of the inclined straight section 22 is tangent to the lower surface of the curved section 21. This arrangement improves the mechanical properties of the sealing ring structure and reduces stress concentration during deformation under stress.

[0043] like Figure 2 As shown, the dimension L3 of the supporting plane 11 in the radial direction of the ring body 10 is greater than or equal to 2 mm and less than or equal to 3 mm. The supporting plane 11 can cooperate with the supporting structure (specifically the flange 62) on the pot body 60 to ensure the contact area between the sealing ring structure and the pot body 60 when not under pressure. Even if the sealing ring structure weakens its elasticity and shrinks after long-term use, the supporting plane 11 can still have a certain supporting and contact area with the flange 62. Preferably, the dimension L3 of the supporting plane 11 in the radial direction of the ring body 10 can be 2 mm, 2.3 mm, 2.5 mm, 2.8 mm, or 3 mm.

[0044] In addition, since the support plane 11 has a certain size in the radial direction, the sealing ring structure can have sufficient contact area with the pot body 60 to ensure the sealing effect of the cooking cavity when the pot body 60 is not pressed or is just pressed, that is, the same sealing ring structure can adapt to the pot body 60 with different materials and different R angles at the pot opening.

[0045] In the embodiment, the longitudinal section of the curved section 21 is an arc structure, wherein the central angle of the curved section 21 is greater than or equal to 55° and less than or equal to 75°. By controlling the size of the central angle of the curved section 21, the angle of the inclined straight section 22 relative to the vertical direction can be controlled, thereby ensuring the anti-adsorption effect in the cover opening process. Preferably, the central angle of the curved section 21 can be 55°, 60°, 65°, 70° or 75°.

[0046] As shown in Figure 2 The arc length L1 of the curved section 21 is greater than or equal to 5 mm and less than or equal to 10 mm. By letting the arc length L1 be within the above range, the sealing area between the sealing ring structure and the pot body 60 in the unpressed state can be ensured. Preferably, the arc length L1 can be 5 mm, 8 mm or 10 mm.

[0047] As shown in Figure 2 The size L2 of the inclined straight section 22 in the extension direction is greater than or equal to 2.5 mm and less than or equal to 4 mm. By letting the size L2 of the inclined straight section 22 in the extension direction be within the above range, the sealing area between the sealing ring structure and the pot body 60 after pressing can be increased, while ensuring that the pressure relief pressure value of the sealing ring structure is within the set range. Preferably, the size L2 can be 2.5 mm, 3 mm, 3.5 mm or 4 mm.

[0048] As shown in Figure 2As shown in FIG. 1, the sealing ring structure further includes a reinforcing rib 30 arranged on the inner surface of the lower sealing lip 20, and the reinforcing rib 30 is located at the joint position of the curved section 21 and the inclined straight section 22. The arrangement of the reinforcing rib 30 can increase the structural strength and aging resistance of the lower sealing lip 20, ensure that the inclined straight section 22 can remain in an inclined and extended state when the pressure in the cooking cavity is equal to the external pressure, and ensure that the inclined straight section 22 can reset under the action of its own elastic force after the pressure in the cooking cavity decreases, and still has good rebounding ability after a long period of use. The joint position of the curved section 21 and the inclined straight section 22 is the position where the lower sealing lip 20 has the largest deformation and the largest tensile stress when it is attached to the inner surface of the pot body 60, and is also the position that is most likely to fail and affect the reset ability of the inclined straight section 22. By arranging the reinforcing rib 30 at this position, the structural strength and aging resistance of this position can be effectively ensured, and the inclined straight section 22 can be smoothly reset to a state of being spaced apart from the inner surface of the pot body 60 after the pressure in the cooking cavity decreases.

[0049] As shown in FIG. 1, Figure 1 and Figure 2 As shown in FIG. 1, the sealing ring structure further includes a hanging protrusion 40 arranged on the outer side of the ring body 10 and extending outward. The hanging protrusion 40 can cooperate with the hanging port on the pot cover 50 to realize the installation of the sealing ring structure on the pot cover 50.

[0050] As shown in FIG. 1, Figure 2 As shown in FIG. 1, the sealing ring structure further includes an upper sealing lip 70 arranged on the inner side of the ring body 10 and extending upward. The structure of the upper sealing lip 70 is the same as that of the lower sealing lip 20, and the upper sealing lip 70 is used to be attached to the inner surface of the pot cover 50 to realize the sealing between the pot cover 50 and the sealing ring structure.

[0051] The present application also provides a cover assembly. An embodiment of the cover assembly of the present application includes a pot cover 50 and a sealing ring structure installed on the pot cover 50, 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 it is difficult to balance the sealing effect and the anti-adsorption effect of the sealing ring structure, and the cover assembly with the sealing ring structure described above also has the advantages described above.

[0052] As shown in FIG. 1, Figure 3 and Figure 4 The present application also provides a cooking appliance. An embodiment of the cooking appliance of the present application includes a pot body assembly and a cover assembly which is openably and closably arranged on the pot body assembly, 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 it is difficult to balance the sealing effect and the anti-adsorption effect of the sealing ring structure, and the cooking appliance with the cover assembly described above also has the advantages described above.

[0053] As shown in Figure 4 The pot body assembly includes a pot body 60, which includes a main body part 61 and a rolled edge part 62 arranged at the upper end of the main body part 61 and extending outward, and a transition arc surface 63 between the rolled edge part 62 and the main body part 61, the rolled edge part 62 is supported below the ring body main part 10 and is attached to the support plane 11, and the transition arc surface 63 is supported below the curved surface section 21 and is attached to the lower surface of the curved surface section 21, when the longitudinal section of the curved surface section 21 is an arc structure, the radius of the lower surface of the curved surface section 21 is greater than the radius of the transition arc surface 63, and the difference between the radius of the lower surface of the curved surface section 21 and the radius of the transition arc surface 63 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. The rolled edge part 62 can support the ring body main part 10, and the transition arc surface 63 cooperates with the lower surface of the curved surface section 21 to ensure that there is enough sealing area between the sealing ring structure and the pot body 60 during the unpressing and pressing processes. The radius of the lower surface of the curved surface section 21 is slightly greater than the radius of the transition arc surface 63, so that in the unpressing state and after the pressure in the cooking cavity decreases after cooking is completed, the curved surface section 21 and the transition arc surface 63 are not completely attached, but have a certain gap, which ensures the anti-absorption effect. Preferably, the above-mentioned radius difference can be 0.5 mm, 1 mm or 1.5 mm.

[0054] Specifically, the sealing ring structure is arranged between the pot cover 50 and the pot body 60, the support plane 11 is an annular plane extending in the horizontal direction, in the unpressing state, the ring body main part 10 is attached to the rolled edge part 62, the curved surface section 21 is attached to the transition arc surface 63, and the inclined straight surface section 22 forms a preset angle a (15°-35°) with the inner surface of the main body part 61, that is, the angle between the inclined straight surface section 22 and the support plane 11 is between 105° and 150°; in the cold state, the pot cover 50 is supported and rotated by the support plane 11 of the sealing ring structure and the lower surface of the curved surface section 21 and the pot body 60; when the pot body 60 is heated, the pot cover 50 is pressed and lifted, the sealing ring structure expands, the lower surface of the curved surface section 21 is pressed and tightly attached to the transition arc surface 63 to form a sealing effect, and the inclined straight surface section 22 is pressed and attached to the inner surface of the main body part 61 to increase the sealing area between the sealing ring structure and the pot body 60, thereby ensuring the safety of the user during use and preventing the steam in the pot from being sprayed out to scald the user.

[0055] In the description of the utility model, it is understood that the orientation words such as '' front, back, up, down, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship is usually based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.

[0056] For the convenience of description, spatial relative terms such as '' above'', '' above'', '' upper surface'', '' upper '' and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. 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 device described in the drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' 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 description used here is interpreted accordingly.

[0057] In addition, it should be noted that the use of '' first'', '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore can not be understood as the limitation of the protection scope of the utility model.

[0058] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A seal ring structure, characterized by, The sealing ring structure comprises: a ring body (10), a lower surface of the ring body (10) forming a support plane (11); a lower sealing lip (20) connected to the inner side of the ring body (10) and extending downward, the lower sealing lip (20) comprising a curved section (21) connected to the ring body (10) and an inclined straight section (22) connected to the lower end of the curved section (21), the curved section (21) having a concave surface facing the outer side of the ring body (10), and the inclined straight section (22) extending toward the inner side of the ring body (10).

2. The seal ring structure of claim 1, wherein The inclined straight section (22) has a preset included angle (a) with the vertical direction, the preset included angle (a) being greater than or equal to 15° and less than or equal to 35°.

3. The seal ring structure of claim 1, wherein The support plane (11) is tangent to the lower surface of the curved section (21); and / or, the lower surface of the inclined straight section (22) is tangent to the lower surface of the curved section (21).

4. The seal ring structure of claim 1, wherein The size (L3) of the support plane (11) in the radial direction of the ring body (10) is greater than or equal to 2mm and less than or equal to 3mm.

5. The seal ring structure of claim 1, wherein The longitudinal section of the curved section (21) is arc-shaped structure, wherein, The central angle of the curved section (21) is greater than or equal to 55° and less than or equal to 75°; and / or, the arc length (L1) of the curved section (21) is greater than or equal to 5mm and less than or equal to 10mm.

6. The seal ring structure of claim 1, wherein The size (L2) of the inclined straight section (22) in the extension direction is greater than or equal to 2.5mm and less than or equal to 4mm.

7. The seal ring structure according to any one of claims 1 to 6, characterized in that, The sealing ring structure further comprises a reinforcing rib (30) provided on the inner surface of the lower sealing lip (20), the reinforcing rib (30) being located at the junction position of the curved section (21) and the inclined straight section (22); and / or, the sealing ring structure further comprises a hanging protrusion (40) provided on the outer side of the ring body (10) and extending outward.

8. A lid assembly comprising a pot lid (50) and a seal ring structure mounted on said pot lid (50), characterized in that, The sealing ring structure is any one of the sealing ring structures according to claims 1 to 7.

9. A cooking appliance comprising a pot body assembly and a lid body assembly openably and closably provided on the pot body assembly, characterized in that, The cover assembly is the cover assembly according to claim 8.

10. A cooking appliance comprising a pot body assembly and a cover assembly which is openably and closably covered on the pot body assembly, characterized in that, The cover assembly comprises a pot cover (50) and a sealing ring structure mounted on the pot cover (50), the sealing ring structure being any one of the sealing ring structures according to claims 1, 2, 3, 4, 6 and 7, and the longitudinal section of the curved section (21) of the sealing ring structure being arc-shaped structure; The pot body assembly comprises a pot body (60), the pot body (60) comprising a main body portion (61) and a turned-up edge portion (62) provided on the upper end of the main body portion (61) and extending outward, the turned-up edge portion (62) and the main body portion (61) having a transition arc surface (63) therebetween, the turned-up edge portion (62) being supported below the ring body (10) and being fitted with the support plane (11), and the transition arc surface (63) being supported below the curved section (21) and being fitted with the lower surface of the curved section (21). The radius of the lower surface of the curved surface section (21) is greater than the radius of the transition arc surface (63), and the difference between the radius of the lower surface of the curved surface section (21) and the radius of the transition arc surface (63) is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. The radius of the lower surface of the curved surface section (21) is greater than the radius of the transition arc surface (63), and the difference between the radius of the lower surface of the curved surface section (21) and the radius of the transition arc surface (63) is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

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