CN213371455U

CN213371455U - Sealing ring and cooking utensil with same

Info

Publication number: CN213371455U
Application number: CN202020782991.4U
Authority: CN
Inventors: 汪艳强; 刘世强
Original assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Current assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-06-08
Anticipated expiration: 2030-05-12

Abstract

The utility model discloses a sealing washer and have its cooking utensil, sealing washer include the sealing washer main part and connect the wall body, and the sealing washer main part has the through-hole, connects the wall body setting in the through-hole, and the wall of connecting the wall body and through-hole links to each other and separates into two at least regions with the through-hole, and wherein, the height ratio an of the height of connecting the wall body along the central line direction of through-hole and the height of through-hole is greater than or equal to 1/3. The utility model provides a sealing washer, when the in-process of assembly received certain exogenic action, the shape of sealing washer main part can remain unchanged, and the sealing washer main part can not produce the phenomenon of distortion and deformation to can swiftly aim at the mounted position with the sealing washer, make the assembly operation go on easily, thereby improved assembly efficiency.

Description

Sealing ring and cooking utensil with same

Technical Field

The utility model relates to a, electric appliance technical field for kitchen, particularly relate to a sealing washer and have its cooking utensil.

Background

In order to ensure the tightness of the steam channel, a sealing ring is generally installed at the steam channel. The size of the existing sealing ring is large, the sealing ring is easy to distort and deform in the assembling process, so that the sealing ring cannot be quickly aligned to the installation position, the assembly operation is not easy to carry out, and after the sealing ring is installed, the installation position of the sealing ring can be incorrect, the installation is not firm, the sealing effect and the steam circulation can be influenced, and the sealing ring can easily fall off from the installation position.

Therefore, a sealing ring and a cooking appliance having the same are needed to at least partially solve the above problems.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

For at least partly solving the above-mentioned problem, the utility model provides a sealing washer for cooking utensil's lid, it includes:

a seal ring body having a through hole; and

a connecting wall body disposed within the through-hole, the connecting wall body being connected to a wall of the through-hole to divide the through-hole into at least two regions,

wherein the height ratio a of the height of the connecting wall body along the central line direction of the through hole to the height of the through hole is more than or equal to 1/3.

According to the scheme, the connecting wall body with the preset height is arranged in the through hole, the structural strength of the sealing ring main body can be enhanced, the shape of the sealing ring main body is kept unchanged when the sealing ring is subjected to certain external force in the assembling process, the phenomenon that the sealing ring main body is distorted and deformed is prevented, the sealing ring can be quickly and conveniently aligned to the installation position, the assembling operation is easy to carry out, and the assembling efficiency is improved. And the sealing washer can not incline and install in the mounted position indeformable to sealed effectual ensures that steam can normally circulate, and the installation is more firm reliable moreover, can not appear the phenomenon that drops from the mounted position.

The connecting wall body divides the through hole into at least two areas, so that the connecting wall body can ensure that the normal circulation of steam is not influenced, and sundries attached to the inner wall of the through hole can be cleaned conveniently.

Optionally, a height of the connecting wall body in a direction of a center line of the through hole is substantially equal to a height of the through hole.

According to the present invention, the height of the connecting wall body can be designed to be substantially equal to the height of the sealing ring main body, so that the connecting wall body can have higher structural strength, and the sealing ring can bear higher external force without distortion and deformation.

Optionally, the shape of the sealing ring is a long strip, the shape of the through hole corresponds to the shape of the sealing ring, the connecting wall body is arranged along the width direction of the sealing ring, and

the through hole is divided into at least two regions in the length direction of the sealing ring by the connecting wall body.

According to this scheme, to the sealing washer that has the rectangular form, set up the fastness after the connection wall body can improve the assembly efficiency of sealing washer better and the installation, guarantee its sealed effect after the installation, because the sealing washer of rectangular form receives the exogenic action more easily and produces distortion and deformation.

Optionally, the wall thickness of the connecting wall increases gradually from the middle of the connecting wall to both ends of the connecting wall connected to the wall of the through hole.

According to the scheme, the connecting wall body can form a structure with a narrow middle part and two wide ends, and the structural strength of the connecting part of the connecting wall body and the wall of the through hole is better compared with the wall body with the same wall thickness, so that the shape of the sealing ring main body in the assembling process can be further kept unchanged.

Optionally, the connecting wall has two vertically extending and oppositely disposed walls, which are both arc-shaped.

According to the scheme, the connecting wall body can form a reinforcing structure similar to a bilateral crescent shape, so that sundries attached to the connecting wall body can be cleaned conveniently.

Optionally, the connection wall body and the seal ring main body are integrally formed, and a round angle or a full round angle is formed between the connection wall body and the wall of the through hole.

According to this scheme, through setting up fillet or full fillet, the production manufacturing that can be convenient for the sealing washer makes the wall body that connects form the structure that the narrow both ends in middle part are wide to in the embodiment that sets up full fillet, can be convenient for connect the wall body and form the additional strengthening similar to bilateral crescent shape.

Optionally, the connecting wall body is symmetrically arranged relative to a center line of the sealing ring in the length direction; and/or the connecting wall bodies are symmetrically arranged relative to the center line of the width direction of the sealing ring.

According to the scheme, in the assembling process of the sealing ring, the connecting wall body can provide balanced force for resisting external force to the sealing ring main body, so that the shape of the sealing ring main body is kept unchanged on the whole; and the production and the manufacture of the sealing ring are convenient.

Optionally, at least one of the connecting walls is included, the minimum wall thickness of the at least one connecting wall being greater than or equal to 2 mm.

According to this aspect, when the minimum wall thickness of the connection wall body is 2mm or more, the structural strength of the connection wall body can be maintained as it is, for a seal ring of a usual size.

Optionally, the sealing ring further comprises a mounting part protruding radially outwards from the sealing ring main body, and the mounting part is provided with a circle of concave parts recessed radially inwards; and/or

The sealing ring further comprises a deformation part connected with the upper end of the sealing ring main body, and the deformation part is of a bent shape.

According to the scheme, the sealing ring can be clamped on the cover body by means of the concave part on the mounting part, the assembling process is simple, and the sealing ring can be detached so as to be convenient to clean and/or replace; and/or the sealing effect of the seal ring can be improved by the deformation portion having the bent shape.

According to another aspect of the present invention, there is provided a cooking appliance comprising a cover body, the cover body including a sealing ring according to any one of the above aspects.

According to the scheme, when the sealing ring on the cover body is subjected to certain external force in the assembling process, the shape of the sealing ring main body can be kept unchanged, and the sealing ring main body cannot be distorted or deformed, so that the sealing ring can be quickly and conveniently aligned to the installation position, the assembling operation is easy to carry out, and the assembling efficiency is improved. And the sealing washer can not incline and install in the mounted position indeformable to sealed effectual ensures that steam can normally circulate, and the installation is more firm reliable moreover, can not appear the phenomenon that drops from the mounted position.

Optionally, the lid still includes inside lining and removable lid, the inside lining is provided with inside lining exhaust hole and step portion, the step portion centers on the inside lining exhaust hole is arranged, the deformation portion of sealing washer is located step portion is interior, removable lid is provided with the sealing washer mounting hole, the edge entering of mounting hole the concave part in the sealing washer main part.

According to the scheme, the sealing ring can be clamped in the sealing ring mounting hole, when the sealing ring is assembled, the sealing ring is only required to be inserted into the sealing ring mounting hole of the detachable cover, the edge of the mounting hole enters the concave part in the sealing ring main body, the mounting of the sealing ring can be achieved, and the mounting process is simple and easy to operate.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.

In the drawings:

fig. 1 is a schematic structural view of a cooking appliance according to a preferred embodiment of the present invention, in which a cover body is in an open position and a detachable cover is detached from an inner liner;

FIG. 2 is an exploded view of the removable cover shown in FIG. 1 in an inverted condition;

FIG. 3 is a schematic perspective view of the sealing ring;

fig. 4 is a schematic cross-sectional view of the cooking appliance shown in fig. 1 taken along a center line of a length of the gasket.

Description of reference numerals:

100: the cooking appliance 110: cover body

111: inner liner 112: detachable cover

113: mounting the column 114: mounting seal

115: liner vent hole 116: step part

117: seal mounting hole 118: sealing ring mounting hole

120: the pot body 130: sealing ring

131: seal ring main body 132: deformation part

133: through-hole 134: mounting part

135: recess 136: connecting wall body

137 a: first main wall 137 b: second main wall

138 a: first end 138 b: second end

138 c: middle part 139: wall surface

151: inner pan 152: pot opening sealing ring

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In the following description, a detailed description will be given for a thorough understanding of the present invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

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 in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Ordinal words such as "first" and "second" are referred to in this application as labels only, and do not have any other meanings, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are used herein for purposes of illustration only and are not limiting.

Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.

As shown in fig. 1, the present invention provides a cooking appliance 100, which includes a cover 110 and a pot body 120. The cover 110 may be openably and closably provided on the pot body 120 to form the cooking appliance 100 between the cover 110 and the pot body 120. The pot body 120 may include a pot body 120 and a heating means such as an inner pot 151, a heating means, etc. provided in or on the pot body 120. It can be understood that the cooking appliance 100 according to the present invention may be an electric cooker, an electric pressure cooker or other cooking appliances 100, and the cooking appliance 100 may have various functions such as cooking porridge, etc. in addition to the function of cooking rice.

Specifically, the pot body 120 has an inner pot receiving part of a cylindrical shape. The inner pan 151 may be fixedly disposed at the inner pan receiving portion, or may be freely put into or taken out of the inner pan receiving portion, so as to facilitate cleaning of the inner pan 151. The inner pot 151 is generally made of a metal material and has a circular opening on an upper surface for containing a material to be heated, such as rice, soup, etc. The pot body 120 includes therein a heating means for heating the inner pot 151 to heat the inner pot 151.

The cover body 110 has a shape substantially corresponding to the pot body 120. The cover 110 is openably and closably provided on the pot body 120, and in particular, is pivoted to the pot body 120 by a pivot shaft, and can be freely pivoted between a closed position and an open position with respect to the pot body 120 about the pivot axis on which the pivot shaft is located, so as to facilitate the closing and opening of the pot body 120. When the cover 110 is covered on the pot body 120, it covers the inner pot 151 and forms a cooking space with the inner pot 151. The lid body 110 also typically has a pot mouth sealing ring 152, which can be made of, for example, a rubber material, disposed between the lid body 110 and the inner pot 151 for sealing the cooking space when the lid body 110 is in a closed state.

As shown in fig. 1, the cover 110 may include an inner liner 111, a cover disposed on an upper or outer side of the inner liner 111, and a detachable cover 112 disposed on a lower or inner side of the inner liner 111. The face cap may snap fit with the liner 111. The removable cover 112 may be removably mounted to the inner liner 111 from the underside. A pot mouth sealing ring 152 may be provided on the outer circumference of the detachable cover 112. When the cover 110 is covered on the pot body 120, the pot opening sealing ring 152 can be in interference fit with the pot opening edge of the inner pot 151 to seal the cooking space.

It should be noted that directional terms used herein to describe various components, parts, etc. of the cover 110, such as "upper", "lower", "above", "below", "upward", "downward", etc., are relative to the cover 110 in a closed state.

In the illustrated embodiment, the removable cover 112 is removably mounted in the cover body 110 by mounting posts 113 provided on the liner 111. Specifically, the liner 111 may be provided with downwardly extending mounting posts 113. The mounting post 113 may be disposed in the center of the liner 111. The removable cover 112 may be provided with a mounting seal 114 and seal mounting holes 117 (FIG. 2) corresponding to the mounting posts 113. The mounting seal 114 is inserted through and snapped into the seal mounting hole 117. The mounting seal 114 is provided with an insertion hole into which the mounting post 113 can be inserted and snapped. Thus, the detachable cover 112 can be attached to and detached from the inner liner 111, facilitating cleaning, maintenance, replacement, and the like of the detachable cover 112. Of course, in embodiments not shown, the removable cover 112 may be mounted to the liner 111 by a mounting, such as a seat for the removable cover 112.

Generally, the cover 110 is provided with a steam passage for communicating the outside with the cooking space to discharge the steam in the cooking space to the atmosphere. Herein, the liner 111 may be provided with a liner vent hole 115. A packing 130 is disposed below the liner vent hole 115, and the packing 130 may have a through hole 133. The through hole 133 can communicate with the liner vent hole 115, forming a steam passage.

Specifically, as shown in fig. 3 and 4, the packing 130 may include a packing main body 131 having a through hole 133 and a deformation portion 132 connected to an upper end of the packing main body 131. The packing body 131 is adapted to be attached to the detachable cover 112 of the cover body 110, and the deformation portion 132 is adapted to seal a gap with the liner 111 of the cover body 110. The liner 111 may also be provided with a step 116. The step 116 can be arranged around the liner vent hole 115, forming a ring of annular steps 116. A portion of the deformation portion 132 is located within the step portion 116, specifically, within a region formed by the step portion 116. The deformation portion 132 can abut and be interference-fitted with a downward-facing surface of the step portion 116. This makes it possible to seal the gap between the liner 111 and the packing 130, and maintain the sealing effect in the steam passage.

The seal ring body 131 may be provided with a mounting portion 134 protruding radially outward. The mounting portion 134 is provided with a ring of radially inwardly recessed recesses 135. The removable cover 112 may be provided with a gasket mounting hole 118 below the liner vent hole 115. The packing 130 may be inserted into the packing mounting hole 118, whereby the edge of the packing mounting hole 118 may enter the recess 135 of the mounting portion 134, thereby achieving the mounting of the packing 130. If needed and/or desired, seal ring body 131 may be provided with recess 135 without mounting portion 134, and in this embodiment, seal ring body 131 has a greater thickness to form recess 135.

In the present embodiment, the gasket 130 includes a connection wall 136 for maintaining the shape of the gasket main body 131. The connection wall 136 can be disposed in the through hole 133 because the packing main body 131 is deformed toward the through hole 133 when an external force is applied. The connecting wall 136 is connected to the wall of the through-hole 133 to divide the through-hole 133 into at least two regions. Connecting wall 136 may be formed as a unitary member with seal ring body 131.

The connection wall 136 can have a predetermined height. Specifically, the height ratio of the height of the connecting wall body in the direction of the center line of the through-hole 133 to the height of the through-hole is a, wherein a may be in the range of a.gtoreq.about 1/3. For example, a is about 1/3, about 1/2, about 2/3, about 3/4, about 4/5, about 1, and the like.

In the illustrated embodiment, the height of the connecting wall in the direction of the center line of the through-hole may be substantially equal to the height of the through-hole, i.e., a ═ about 1. In other words, the connection wall 136 can extend from the upper end of the packing main body 131 to the lower end of the packing main body 131, and the height of the connection wall may be substantially equal to the height of the packing main body. Further, the height of the connecting wall 136 is smaller than the height of the packing main body 131 and close to the height of the packing main body 131; it may be substantially equal to or slightly above the height of seal ring body 131.

With the embodiment, the structural strength of the sealing ring main body 131 can be enhanced, so that when the sealing ring 130 is subjected to a certain external force in the assembling process, the shape of the sealing ring main body 131 is kept unchanged, the phenomenon that the sealing ring main body 131 is distorted and deformed is prevented, the sealing ring 130 can be quickly aligned to the installation position, the assembling operation is easy to perform, and the assembling efficiency is improved. And the sealing ring 130 can be installed at the installation position without deflection and deformation, so that the sealing effect is good, the normal circulation of steam can be ensured, the installation is firmer and more reliable, and the phenomenon of falling from the installation position can not occur.

As shown in fig. 3, the seal ring 130 is elongated, for example, substantially rectangular with rounded corners as shown. Accordingly, the gasket main body 131 and the deformation portion 132 are both elongated in shape. The shape of the through hole can correspond to the shape of the sealing ring and is also long-strip-shaped, namely, the through hole is a strip-shaped hole. The connecting wall body 136 may be arranged along the width direction D1 of the packing 130 because the packing main body 131 is more easily deformed in the width direction D1 when an external force is applied to the packing 130 having an elongated shape. Therefore, the assembling efficiency and the firmness after installation of the sealing ring 130 with the strip shape can be better improved, and the sealing effect after installation is ensured.

Specifically, the seal ring main body 131 may include two oppositely disposed first main wall bodies 137a and two oppositely disposed second main wall bodies 137 b. The first main wall 137a extends in the longitudinal direction D2, and the second main wall 137b extends in the width direction D1. The first main wall 137a can be connected to the second main wall 137b to form a ring. The length dimension of the first main wall 137a is greater than the length dimension of the second main wall 137 b. Both ends of the connecting wall 136 can be connected to the two first main walls 137a, respectively.

The seal ring 130 may include at least one connecting wall 136. The through-opening 133 can be divided into at least two regions in the longitudinal direction D2 of the sealing ring 130 by at least one connecting wall 136. For example, in the illustrated embodiment, the seal ring 130 is shown to include a connecting wall 136, and the through-hole 133 is divided into two regions by the connecting wall 136 in the length direction D2 of the seal ring 130. In this embodiment, the number of the connection wall bodies 136 is not limited and may be set as needed, but the structural strength of the connection wall bodies 136 is required to prevent the deformation of the seal ring main body 131 and the normal circulation of steam, and to easily clean the foreign materials attached to the inner wall of the exhaust hole.

The wall thickness of connecting wall 136 may increase gradually from a middle portion 138c of connecting wall 136 to both ends of connecting wall 136. For an elongated sealing ring, the wall thickness of connecting wall 136 may increase gradually from middle 138c of connecting wall 136 to the ends of connecting wall 136 in width direction D1. In particular, the wall thickness of connecting wall 136 may gradually increase in the width direction D1 from a middle portion 138c of connecting wall 136 to a first end 138a of connecting wall 136; also, the wall thickness of connecting wall 136 may also gradually increase in width direction D1 from a middle portion 138c of connecting wall 136 to a second end 138b of connecting wall 136 opposite first end 138 a.

Thus, the connecting wall 136 may form a structure having a narrow middle portion 138c and two wide ends, which has a better structural strength at the connection between the connecting wall 136 and the wall of the through hole 133 than a wall having the same wall thickness, in other words, a gradually changing thickness allows a reinforcing structure to be formed at the connection between the connecting wall 136 and the wall of the through hole 133, thereby further maintaining the shape of the gasket main body 131 during the assembly process.

The minimum wall thickness L of at least one connecting wall 136 needs to be maintained in the range of 2mm or more. For one connecting wall 136, the minimum wall thickness L refers to the wall thickness of the one connecting wall 136 at its thinnest. For example, for the illustrated embodiment, the wall thickness of the middle portion 138c of connecting wall 136 is at a minimum. For two or more connecting walls 136, the minimum wall thickness L refers to the total wall thickness of each of the two or more connecting walls 136 where it is thinnest. Accordingly, the minimum wall thickness L is maintained at 2mm or more, and the seal ring 130 can be applied to a normal size, so that the structural strength of the connection wall 136 can be maintained without changing the shape of the seal ring main body 131.

The connecting wall 136 may be integrally formed with the packing main body 131. Of course, the connecting wall 136 may be a separate member that is mounted within the through-hole 133 by adhesive or snap-fit, etc., if needed and/or desired. Rounded or full-rounded corners may be formed between the connecting wall 136 and the walls of the through-hole 133. This facilitates the manufacture of the seal ring 130, and allows the connecting wall 136 to be formed with a narrow middle portion 138c and a wide end portion.

The connecting wall 136 has two walls 139 extending vertically and arranged opposite to each other. The two walls 139 may be curved. Specifically, the curved wall 139 is shown as protruding from the concave end of the middle portion 138c in the length direction D2. The curved wall 139 may be formed by a rounded corner, so that the connecting wall 136 may form a reinforcing structure similar to a bilateral crescent shape, which may facilitate cleaning of the impurities attached to the connecting wall 136.

Since the sealing ring 130 is generally designed as a symmetrical structure, the connecting wall 136 may be arranged symmetrically with respect to the center line of the length direction D2 of the sealing ring 130, for example, in the illustrated embodiment; the connecting wall 136 may be arranged symmetrically with respect to the center line of the seal ring 130 in the width direction D1. Thus, in the process of assembling the gasket 130, the connecting wall 136 can provide the gasket main body 131 with a balanced force against the external force, so that the shape of the gasket main body 131 is kept unchanged as a whole; and facilitates the production and manufacture of the seal ring 130.

The cooking apparatus 100 of the present invention comprises a cover 110, wherein the cover 110 is provided with the above-mentioned sealing ring 130. Therefore, when the sealing ring main body 131 is subjected to a certain external force in the assembling process, the shape of the sealing ring main body 131 can be kept unchanged, and the sealing ring main body 131 cannot be distorted or deformed, so that the sealing ring 130 can be quickly aligned to the mounting position, the assembling operation is easy to perform, and the assembling efficiency is improved. And the sealing ring 130 can be installed at the installation position without deflection and deformation, so that the sealing effect is good, the normal circulation of steam can be ensured, the installation is firmer and more reliable, and the phenomenon of falling from the installation position can not occur.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A gasket for a cover (110) of a cooking appliance (100), comprising:

a seal ring body (131), the seal ring body (131) having a through hole (133); and

a connecting wall body (136), the connecting wall body (136) being arranged within the through-hole (133), the connecting wall body (136) being connected to a wall of the through-hole (133) to divide the through-hole (133) into at least two regions,

wherein the height ratio a of the height of the connecting wall body (136) along the center line direction of the through hole (133) to the height of the through hole (133) is not less than 1/3.

2. A seal ring according to claim 1, characterized in that the height of the connecting wall (136) in the direction of the centre line of the through hole (133) is substantially equal to the height of the through hole (133).

3. The seal ring according to claim 1,

the shape of the sealing ring (130) is a long strip, the shape of the through hole corresponds to the shape of the sealing ring, the connecting wall body (136) is arranged along the width direction (D1) of the sealing ring (130), and

the through-opening (133) is divided into at least two regions in the longitudinal direction (D2) of the sealing ring (130) by the connecting wall (136).

4. A seal ring according to any one of claims 1 to 3, characterized in that the wall thickness of the connecting wall (136) increases progressively from the middle of the connecting wall (136) to the two ends of the connecting wall (136) which are connected to the wall of the through hole (133).

5. A seal ring according to claim 4, characterized in that the connecting wall (136) has two vertically extending and oppositely arranged walls (139), the two walls (139) each being arc-shaped.

6. A ring seal according to claim 1, characterized in that the connecting wall (136) is formed integrally with the ring seal body (131), the connecting wall (136) being formed with rounded corners or with full rounded corners between the wall of the through hole (133).

7. A seal ring according to claim 1, characterized in that the connecting wall (136) is arranged symmetrically with respect to a centre line of the length direction (D2) of the seal ring (130); and/or the connecting walls (136) are arranged symmetrically with respect to a center line of the seal ring (130) in the width direction (D1).

8. A seal ring according to claim 1, characterized by comprising at least one of said connecting walls (136), the minimum wall thickness (L) of at least one of said connecting walls (136) being greater than or equal to 2 mm.

9. The seal ring according to claim 1,

the sealing ring further comprises a mounting part (134) protruding outwards from the sealing ring main body (131) in the radial direction, and the mounting part (134) is provided with a circle of concave parts (135) which are recessed inwards in the radial direction; and/or

The seal ring further comprises a deformation part (132) connected with the upper end of the seal ring main body (131), and the deformation part (132) has a bent shape.

10. A cooking appliance, characterized by comprising a cover (110), the cover (110) comprising a sealing ring (130) according to any one of claims 1 to 9.

11. The cooking appliance according to claim 10, wherein the cover body (110) further comprises a liner (111) and a detachable cover (112), the liner (111) is provided with a liner vent hole (115) and a step (116), the step (116) is arranged around the liner vent hole (115), the deformation portion (132) of the gasket (130) is located in the step (116), and the detachable cover (112) is provided with a gasket mounting hole (118), an edge of which enters a recess (135) on the gasket body (131).