Vacuum cooking utensil with good sealing effect

Abstract

The utility model relates to the technical field of kitchen cooking utensils, and particularly discloses a vacuum cooking utensil with a good sealing effect, which comprises a pot body, a pot cover and a sealing ring. The pot body comprises a pot body and an inner pot arranged in the pot body, and the opening part of the inner pot is provided with a flange extending outwards; the sealing ring comprises a connecting part and a sealing part connected with the connecting part; the sealing part comprises a first sealing lip and a second sealing lip; the first sealing lip is configured to obliquely extend from the connecting part to the inner side of the sealing ring, and is attached to the part, close to the interior of the inner pot, of the turned-over edge in a cover closing state so as to prevent gas in the inner pot from escaping during positive pressure; and the second sealing lip is configured to obliquely extend from the connecting part to the outer side of the sealing ring, and is attached to the part, far away from the interior of the inner pot, of the flange in a cover closing state so as to prevent external air from entering the internal space of the inner pot under negative pressure. The sealing requirements in two pressure states can be met at the same time, and the problem of unstable pressure caused by gas leakage or external gas entering is solved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen cooking appliances technology, and in particular to a vacuum cooking appliance with good sealing effect. Background Technology

[0002] Currently, there are many types of vacuum cooking appliances on the market, and sealing performance is one of the key indicators for measuring the quality of vacuum cooking appliances. Good sealing performance can not only ensure a stable pressure environment during cooking, but also achieve ideal vacuum cooking results.

[0003] However, existing vacuum cooking appliances still have many unresolved issues regarding their sealing performance. Some vacuum cooking appliances have overly simplistic sealing designs, typically relying on a single sealing lip in contact with the pot body to achieve a seal. (See [reference needed]). Figure 1 and Figure 2 The inner lid 10 covers the inner pot 20, and the inner lid 10 has a sealing ring 30 with a sealing lip 31. This structure is inadequate when dealing with the complex cooking environment of alternating positive and negative pressure, and it is difficult to meet the sealing requirements under both pressure conditions simultaneously. When positive pressure is generated inside the inner pot, gas can easily leak out from the gaps in the seal, causing the pressure inside the inner pot to be unstable and unable to be maintained at the set value, thus affecting the control of cooking temperature and time, and greatly reducing the cooking effect. When negative pressure is formed inside the inner pot, outside gas can enter the inner pot through the gaps in the seal, disrupting the originally stable vacuum environment. This not only affects the shelf life of food, but also interferes with the normal cooking process, reducing the taste and nutritional value of the food.

[0004] In existing technologies, although attempts have been made to improve the sealing of vacuum cooking appliances using a double-lip sealing structure, where one lip extends into the inner wall of the inner pot and the other fits against the rim of the inner pot, the lip extending into the inner pot lacks an effective support structure because the lid also needs to fit snugly against the inner pot. During cooking, gaps easily form between the lip and the inner wall of the inner pot due to the shaking of the inner pot and frequent pressure changes. Once these gaps appear, air leakage occurs, leading to seal failure and preventing the desired sealing effect from being achieved. This not only affects the overall performance of the vacuum cooking appliance but also significantly reduces the user experience.

[0005] In conclusion, the various shortcomings of existing vacuum cooking appliances in terms of sealing severely restrict their cooking effects and lifespan, failing to fully meet consumers' demands for high-quality vacuum cooking. Therefore, developing a vacuum cooking appliance with excellent sealing performance and a stable and reliable structure is of significant practical importance. Utility Model Content

[0006] This invention provides a vacuum cooking appliance with good sealing performance, aiming to overcome the problem of poor sealing performance of existing vacuum cooking appliances, achieve a stable vacuum cooking environment, and improve cooking results.

[0007] The vacuum cooking appliance with good sealing effect provided by this utility model includes:

[0008] The pot body includes a pot body and an inner pot disposed in the pot body, the inner pot being used to hold food to be cooked, and the opening of the inner pot having an outwardly extending flange.

[0009] A lid is placed over the pot body;

[0010] A sealing ring is provided on the pot lid. The sealing ring includes a connecting part and a sealing part connected to the connecting part. The connecting part is used for the installation and fixing of the sealing ring.

[0011] The sealing part includes a first sealing lip and a second sealing lip for sealing the flange of the inner pot;

[0012] The first sealing lip is configured to extend obliquely from the connecting portion toward the inside of the sealing ring, and in the closed state, it abuts against the portion of the flange near the inside of the inner pot to prevent gas inside the inner pot from escaping under positive pressure.

[0013] The second sealing lip is configured to extend obliquely from the connecting portion to the outside of the sealing ring, and in the closed state, it abuts against the portion of the flange away from the inside of the inner pot to prevent external gas from entering the inner pot's internal space under negative pressure.

[0014] Furthermore, the pot lid includes an inner lid, the edge of which is provided with an annular fixing member for fixing the sealing ring.

[0015] Furthermore, the fastener has an upward-facing fixing groove, and the connecting part of the sealing ring is bent at the end away from the sealing part and inserted into the fixing groove through the opening of the fixing groove.

[0016] Furthermore, the fastener is fixed to the inner cover by screws.

[0017] Furthermore, in the open state, with the vertical direction as the reference, the tilt angle between the first sealing lip and the second sealing lip does not exceed 60 degrees.

[0018] Furthermore, the flange has a horizontal portion and a bent portion. In the closed state, the first sealing lip is attached to the bent portion, and the second sealing lip is attached to the horizontal portion.

[0019] Furthermore, the sealing ring is an integral structure formed by injection molding; the sealing ring is a silicone sealing ring or a rubber sealing ring.

[0020] Furthermore, the inner cover is made of a flexible metal sheet with a thickness of 0.1mm - 1.2mm.

[0021] Furthermore, it also includes an air pump, which draws air from the inside of the inner pot to create a negative pressure inside the inner pot.

[0022] Furthermore, the pot lid is equipped with a pressure detection device, which is connected to the inner lid to measure the phase change of the inner lid under the negative pressure state of the inner pot, and to obtain the pressure inside the inner pot.

[0023] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects:

[0024] 1. The sealing ring of this vacuum cooking appliance comprises a first sealing lip and a second sealing lip. The first sealing lip extends obliquely inward from the connecting part towards the inside of the sealing ring, and when the lid is closed, it fits tightly against the portion of the inner pot's flange near the inside of the inner pot. When positive pressure is generated inside the inner pot, the first sealing lip effectively prevents internal gas from escaping, maintaining stable pressure inside the inner pot. The second sealing lip extends obliquely outward from the sealing ring, fitting against the portion of the flange away from the inside of the inner pot. When negative pressure is generated inside the inner pot, it prevents external gas from entering the inner space of the inner pot. This bidirectional sealing design fully considers the complex cooking environment of alternating positive and negative pressure. Compared with the single sealing lip structure in the prior art, it can simultaneously meet the sealing requirements under two pressure states. It avoids pressure instability caused by gas leakage or the entry of external gas. In addition, compared with the structure in the prior art where the sealing lip extends into the inner wall of the inner pot, it not only does not affect the sealing between the lid and the inner pot, but the flange also effectively supports the first sealing lip, ensuring the sealing effect and preventing gas from escaping from inside the inner pot. It ensures precise control of temperature and time during the cooking process, thereby achieving the ideal vacuum cooking effect, allowing food to be heated evenly, better retaining nutrients, and greatly improving taste and quality.

[0025] 2. The inner edge of the lid of this utility model is provided with a ring-shaped fixing member. The fixing member has an upward-facing fixing groove. The connecting part of the sealing ring is bent at the end away from the sealing part and inserted into the fixing groove. The fixing member and the inner lid are fixed with screws. This installation method ensures that the sealing ring is firmly fixed to the lid, preventing loosening or displacement. Compared with some existing products where the sealing ring is not securely installed, this design greatly improves the stability of the sealing ring. During cooking, even if the inner pot shakes, the sealing ring will always maintain the correct position, ensuring a tight fit between the first and second sealing lips and the inner pot's rim.

[0026] 3. The sealing ring of this utility model adopts an integral injection-molded structure, made of silicone or rubber, which has good elasticity and flexibility. In the open state, the tilt angle between the first and second sealing lips does not exceed 60 degrees, giving it better resilience. This design allows the sealing ring to maintain good sealing performance even after repeated opening and closing operations during long-term use, extending the product's service life and reducing user costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of this utility model, and are not intended to limit this utility model.

[0028] Figure 1 This is a cross-sectional view of the inner lid and inner pot of a vacuum cooking appliance in the open state, as described in the background art of this utility model.

[0029] Figure 2 for Figure 1 Enlarged view of part A;

[0030] Figure 3 This is an overall sectional view of the vacuum cooking appliance in the embodiment of this utility model;

[0031] Figure 4 This is a cross-sectional view of the inner lid and inner pot of the vacuum cooking appliance in the open state in an embodiment of the present utility model.

[0032] Figure 5 for Figure 4 Enlarged view of part B;

[0033] Figure 6 This is a cross-sectional view of the inner lid and inner pot of the vacuum cooking appliance in the closed state in an embodiment of the present utility model.

[0034] Figure 7 for Figure 6 Enlarged view of part C.

[0035] Figure label:

[0036] 100. Vacuum cooking appliances;

[0037] 110. Pot body; 111. Clay pot body; 112. Inner pot; 1121. Flanged edge; 11211. Horizontal section; 11212. Bending section;

[0038] 120. Pot lid; 121. Inner lid; 122. Fastener; 1221. Fixing groove;

[0039] 130. Sealing ring; 131. Connecting part; 132. Sealing part; 1321. First sealing lip; 1322. Second sealing lip. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0045] Please refer to Figures 3-7. The vacuum cooking appliance 100 of this utility model mainly includes a pot body 110, a pot lid 120, and a sealing ring 130.

[0046] The pot body 110 comprises a pot body 111 and an inner pot 112. The pot body 111 serves as the external support structure for the entire pot body, providing space for the installation and placement of the inner pot 112. Its material can be a metal with good thermal conductivity and strength, such as stainless steel, or a high-temperature resistant, insulating engineering plastic, depending on the actual product positioning and cost budget. The inner pot 112, located inside the pot body 111, is a key component for holding the food being cooked. The inner pot 112 is typically made of a material with uniform thermal conductivity and corrosion resistance, such as aluminum alloy with a non-stick coating, or food-grade stainless steel. The opening of the inner pot 112 has an outwardly extending flange 1121, which plays a crucial role in the entire sealing structure. It not only provides a basic structure for the sealing ring 130 to fit snugly but also enhances the strength and rigidity of the opening of the inner pot 112 to a certain extent.

[0047] The lid 120 is placed on the pot body 110, and its main function is to cooperate with the pot body 110 to form a relatively enclosed cooking space. A sealing ring 130 is provided on the lid 120. The sealing ring 130 includes a connecting part 131 and a sealing part 132 connected to the connecting part 131. The connecting part 131 is mainly used for the installation and fixation of the sealing ring 130.

[0048] In this embodiment, the sealing part 132 includes a first sealing lip 1321 and a second sealing lip 1322. The first sealing lip 1321 extends obliquely from the connecting part 131 toward the inner side of the sealing ring 130, and in the closed state, it fits tightly against the part of the flange 1121 near the inside of the inner pot 112. When positive pressure is generated inside the inner pot 112, under the action of pressure, the first sealing lip 1321 will fit more tightly against the part of the flange 1121 near the inside of the inner pot 112, effectively preventing internal gas from escaping and maintaining stable pressure inside the inner pot 112. For example, when steaming food, as the temperature rises, steam is continuously generated inside the inner pot 112, and the pressure gradually increases. At this time, the first sealing lip 1321 can effectively prevent steam from leaking from the seal, ensuring that the steaming process is carried out at the set pressure and temperature, so that the food can be heated evenly and achieve the ideal steaming effect.

[0049] The second sealing lip 1322 extends obliquely from the connecting part 131 towards the outer side of the sealing ring 130, and in the closed state, it abuts against the portion of the flange 1121 away from the interior of the inner pot 112. When a negative pressure is formed inside the inner pot 112, the external atmospheric pressure will press the second sealing lip 1322 tightly against the portion of the flange 1121 away from the interior of the inner pot 112, thereby preventing external gas from entering the interior space of the inner pot 112. For example, in cooking operations that require a negative pressure environment, such as vacuum preservation or sous-vide cooking, the second sealing lip 1322 can effectively prevent outside air from entering, maintain a stable vacuum state inside the inner pot 112, extend the shelf life of food, and ensure that food is cooked under a specific negative pressure environment, thus better preserving the nutritional components and taste of the food.

[0050] In some embodiments, the pot lid 120 includes an inner lid 121, which is the part of the pot lid 120 directly connected to the sealing ring 130. The inner lid 121 needs to have sufficient strength and rigidity to withstand changes in internal pressure during cooking, and also needs to fit tightly with the sealing ring 130 to ensure a good seal. The edge of the inner lid 121 is provided with an annular fixing member 122, which is used to fix the sealing ring 130.

[0051] In some embodiments, the fastener 122 has an upward-facing fixing groove 1221, which is designed to facilitate the installation and fixation of the sealing ring 130. The connecting portion 131 of the sealing ring 130 is bent at the end away from the sealing portion 132 and inserted into the fixing groove 1221 through the opening. This design allows the sealing ring 130 to be securely installed on the inner cover 121. During insertion, the bent connecting portion 131 fits tightly against the inner wall of the fixing groove 1221, generating a certain amount of friction to prevent the sealing ring 130 from shifting during cooking.

[0052] In some embodiments, to further ensure the stability of the sealing ring 130 installation, the fastener 122 and the inner cover 121 are fixed together by screws. The specific installation process is as follows: First, insert the bent part of the connecting portion 131 of the sealing ring 130 into the fixing groove 1221 of the fastener 122; then, place the fastener 122 at the corresponding position on the edge of the inner cover 121, so that the screw holes on the fastener 122 are aligned with the screw holes on the inner cover 121; finally, use screws to pass through the screw holes of the fastener 122 and the inner cover 121 and tighten them, so that the fastener 122 and the inner cover 121 are firmly connected together by the tightening force of the screws, thereby stably fixing the sealing ring 130 to the pot lid.

[0053] This installation method demonstrates good stability in practical use. For example, during cooking, when the inner pot 112 shakes due to thermal expansion from heating or from stirring food, the sealing ring 130, firmly installed on the inner lid 121 by the fixing member 122, can always maintain the correct position, ensuring a tight fit between the first sealing lip 1321 and the second sealing lip 1322 and the flange 1121 of the inner pot 112. This effectively avoids sealing failure caused by loosening or displacement of the sealing ring 130.

[0054] In some embodiments, when the lid is open, the tilt angle of the first sealing lip 1321 and the second sealing lip 1322, with the vertical direction as the reference, does not exceed 60 degrees. This tilt angle design gives the first sealing lip 1321 and the second sealing lip 1322 better resilience. After multiple opening and closing operations, the sealing lips can quickly return to their original shape and position, maintaining good sealing performance. For example, when the user frequently uses the vacuum cooking appliance 100 for cooking, even after hundreds of opening and closing operations, due to the good resilience of the sealing lips, the sealing ring 130 can still fit tightly against the flange 1121 of the inner pot 112, effectively extending the product's service life and reducing the cost for the user to replace the sealing ring due to a decline in sealing performance.

[0055] In some embodiments, the flange 1121 has a horizontal portion 11211 and a bent portion 11212. This structural design is to better cooperate with the sealing lip of the sealing ring 130 to achieve a sealing function. The horizontal portion 11211 is parallel to the axial direction of the inner pot 112 and, in the closed state, is used to tightly fit with the second sealing lip 1322 of the sealing ring 130. The bent portion 11212 is formed by bending from the horizontal portion 11211 away from the interior of the inner pot 112, and it forms a certain angle with the axial direction of the inner pot 112. When the lid is closed, it tightly fits with the first sealing lip 1321 of the sealing ring 130. Through the cooperation of the horizontal portion 11211 and the bent portion 11212, a stable and effective sealing contact surface can be provided for the sealing ring 130.

[0056] In actual use, when food is placed in the inner pot 112 and the lid 120 is closed, the flange 1121 of the inner pot 112 will interact with the sealing lip of the sealing ring 130 to form a sealed space, laying the foundation for the subsequent vacuum cooking process.

[0057] In some embodiments, the sealing ring 130 is an integral injection-molded structure. This structural design ensures the integrity and sealing performance of the sealing ring 130, avoiding air leakage caused by gaps created through splicing or other methods. The sealing ring 130 is made of silicone or rubber. Both silicone and rubber have good elasticity and flexibility, and can maintain good sealing performance under different temperature and pressure environments.

[0058] In some embodiments, the inner lid 121 is made of an elastic metal sheet with a thickness of 0.1mm-1.2mm. This elastic metal sheet can fit tightly with the sealing ring 130. When the lid 120 is placed on the pot body 110, under pressure, the inner lid 121 can undergo slight elastic deformation, making the first sealing lip 1321 and the second sealing lip 1322 of the sealing ring 130 fit more tightly with the flange 1121 of the inner pot 112, effectively improving the sealing effect and reducing gas leakage. Secondly, from the perspective of user experience, the thickness of the elastic metal sheet is within a reasonable range, which can ensure that the inner lid 121 has a certain strength to withstand the pressure changes during cooking, and because of its elasticity, it can provide moderate cushioning when opening and closing the lid, reducing noise caused by rigid collisions, and reducing the force required for users to open and close the lid, making it more convenient to use. Furthermore, in terms of balancing product cost and performance, a thickness range of 0.1mm - 1.2mm reduces material usage and lowers costs compared to excessively thick metal sheets; while compared to excessively thin materials, it ensures sufficient strength and elasticity, guaranteeing stable product performance and improving product cost-effectiveness.

[0059] In some embodiments, to achieve a negative pressure environment inside the inner pot 112, the vacuum cooking appliance 100 of this invention further includes an air extraction pump (not shown in the figure). The air extraction pump is connected to the inside of the inner pot 112 via a pipe. During cooking, when a negative pressure needs to be created inside the inner pot 112, the air extraction pump is activated. The pump extracts air from inside the inner pot 112, and as air is continuously expelled, the pressure inside the inner pot 112 gradually decreases, thereby creating a negative pressure environment. The power and extraction speed of the air extraction pump can be adjusted according to actual cooking needs to meet different negative pressure requirements.

[0060] In some embodiments, a pressure detection device (not shown) is provided inside the lid 120, and the pressure detection device is connected to the inner lid 121. The function of the pressure detection device is to measure the phase change of the inner lid 121 under negative pressure in the inner pot, thereby obtaining the pressure inside the inner pot. Specifically, the pressure detection device can be a pressure sensor. When the pressure inside the inner pot 112 changes, the pressure sensor will detect the slight deformation of the inner lid 121 caused by the pressure change. By measuring and analyzing this deformation, it is converted into a pressure signal, thereby accurately obtaining the pressure value inside the inner pot 112. The pressure detection device transmits the pressure signal to the control system of the vacuum cooking appliance 100. The control system controls components such as the vacuum pump according to preset pressure parameters to ensure that the pressure inside the inner pot 112 is always maintained within the set range, thereby achieving a stable vacuum cooking process.

[0061] When using the vacuum cooking appliance 100 of this utility model, first place the food to be cooked into the inner pot 112, and then place the lid 120 on the pot body 110. At this time, the first sealing lip 1321 and the second sealing lip 1322 of the sealing ring 130 are tightly fitted with the bent part 11212 and the horizontal part 11211 of the flange 1121 of the inner pot 112, respectively, to form a preliminary seal.

[0062] Next, set the corresponding cooking program and parameters according to the cooking needs, such as selecting the required negative pressure value, cooking temperature, and time. After setting, start the vacuum cooking appliance 100, and the vacuum pump starts working, extracting the air from inside the inner pot 112, gradually creating a negative pressure environment inside the inner pot 112. During the extraction process, the pressure detection device monitors the pressure inside the inner pot 112 in real time and transmits the pressure signal to the control system. When the pressure reaches the preset negative pressure value, the control system controls the vacuum pump to stop working, at which point the inner pot 112 is in a stable negative pressure state.

[0063] Subsequently, the cooking appliance begins heating and cooking according to the preset temperature and time. During the cooking process, because the inner pot 112 is under negative pressure, the food can be cooked at a lower temperature, thus better preserving its nutrients and texture. At the same time, the first sealing lip 1321 and the second sealing lip 1322 of the sealing ring 130 maintain a tight fit with the flange 1121 of the inner pot 112 under both positive and negative pressure, effectively preventing gas leakage and entry, and ensuring that the cooking process takes place in a stable pressure environment.

[0064] When the cooking time is over, the vacuum cooking appliance 100 will automatically stop heating. At this point, you can choose whether to allow it to cool naturally or quickly. After cooling, open the lid 120, remove the cooked food, and the cooking process is complete.

[0065] In summary, the vacuum cooking appliance 100 of this utility model, through its reasonable structural design and the coordinated work of its components, can achieve a good sealing effect, effectively cope with the complex cooking environment of alternating positive and negative pressure, ensure stable pressure during cooking, improve cooking effect and food quality, and has high practicality and market promotion value.

[0066] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A vacuum cooking appliance with good sealing performance, comprising: The pot body includes a pot body and an inner pot disposed in the pot body, the inner pot being used to hold food to be cooked, and the opening of the inner pot having an outwardly extending flange. A lid is placed over the pot body; A sealing ring is provided on the pot lid. The sealing ring includes a connecting part and a sealing part connected to the connecting part. The connecting part is used for the installation and fixing of the sealing ring. Its features are: The sealing part includes a first sealing lip and a second sealing lip for sealing the flange of the inner pot; The first sealing lip is configured to extend obliquely from the connecting portion toward the inside of the sealing ring, and in the closed state, it abuts against the portion of the flange near the inside of the inner pot to prevent gas inside the inner pot from escaping under positive pressure. The second sealing lip is configured to extend obliquely from the connecting portion to the outside of the sealing ring, and in the closed state, it abuts against the portion of the flange away from the inside of the inner pot to prevent external gas from entering the inner pot's internal space under negative pressure.

2. The vacuum cooking appliance according to claim 1, characterized in that, The pot lid includes an inner lid, and the edge of the inner lid is provided with an annular fixing member, which is used to fix the sealing ring.

3. The vacuum cooking appliance according to claim 2, characterized in that, The fastener has an upward-facing fixing groove, and the connecting part of the sealing ring is bent at the end away from the sealing part and inserted into the fixing groove through the opening of the fixing groove.

4. The vacuum cooking appliance according to claim 2 or 3, characterized in that, The fastener is fixed to the inner cover by screws.

5. The vacuum cooking appliance according to claim 1, characterized in that, With the lid open, the tilt angle between the first and second sealing lips, based on the vertical direction, does not exceed 60 degrees.

6. The vacuum cooking appliance according to claim 1, characterized in that, The flange has a horizontal portion and a bent portion. When the lid is closed, the first sealing lip is attached to the bent portion, and the second sealing lip is attached to the horizontal portion.

7. The vacuum cooking appliance according to claim 1, characterized in that, The sealing ring is an integral structure formed by injection molding; the sealing ring is a silicone sealing ring or a rubber sealing ring.

8. The vacuum cooking appliance according to claim 2, characterized in that, The inner cover is made of a flexible metal sheet with a thickness of 0.1mm-1.2mm.

9. The vacuum cooking appliance according to claim 2, characterized in that, It also includes a vacuum pump, which draws air from the inside of the inner pot to create a negative pressure inside the inner pot.

10. The vacuum cooking appliance according to claim 9, characterized in that, The pot lid is equipped with a pressure detection device, which is connected to the inner lid to measure the phase change of the inner lid under the negative pressure state of the inner pot and obtain the pressure inside the inner pot.

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