Exhaust structure, cover assembly and cooking appliance

Abstract

This invention provides an exhaust structure, a cover assembly, and a cooking appliance. The exhaust structure includes: a shell made of plastic or metal; an exhaust channel disposed within the shell, the exhaust channel having an inlet and an outlet, and including a first exhaust channel and a second exhaust channel; and a buffer chamber located between the first and second exhaust channels, the width of the buffer chamber being greater than the width of the first and second exhaust channels. The technical solution of this application effectively solves the problem of poor bubble-breaking effect in related technologies.

Description

Technical Field

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

[0002] To make cooking easier for users, there is an increasing variety of cooking appliances, such as rice cookers, electric pressure cookers, and electric slow cookers. When cooking certain foods, such as porridge or soup, these appliances sometimes overflow during the venting process. The main reason for this overflow is that liquid porridge and thick soup form bubbles, which escape through the vent. These bubbles often carry broth or liquid, causing the overflow. Overflowing spills make the surface of the appliance dirty and can easily burn the user.

[0003] In related technologies, a bubble-breaking structure is installed on the steam valve to prevent the soup inside the container from overflowing. However, the bubble-breaking effect of the above-mentioned structure is not good during use, resulting in a high risk of overflow. Summary of the Invention

[0004] The main objective of this invention is to provide an exhaust structure, a cover assembly, and a cooking appliance to solve the problem of poor bubble-breaking effect in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, an exhaust structure is provided, comprising: a housing made of plastic or metal; an exhaust channel disposed within the housing, the exhaust channel having an inlet and an outlet, the exhaust channel including a first exhaust channel and a second exhaust channel; and a buffer chamber located between the first exhaust channel and the second exhaust channel, the width of the buffer chamber being greater than the width of the first exhaust channel and the width of the second exhaust channel.

[0006] Applying the technical solution of this invention, when bubbles enter the first exhaust channel from the air inlet, the bubbles flow at a relatively high speed. During the flow, the bubbles come into contact with the sidewall of the first exhaust channel, causing them to break. Due to the buffer chamber, when bubbles enter, the large width of the buffer chamber reduces the flow speed, which facilitates gas-liquid separation. When bubbles enter the second exhaust channel from the buffer chamber, the connection between the buffer chamber and the second exhaust channel is small, and the width of the second exhaust channel is also small. Therefore, the bubbles will squeeze against each other, resulting in bubble breakage. Simultaneously, bubbles that fail to break continue to contact the sidewall of the second exhaust channel, causing further breakage. This bubble breakage allows any entrained liquid or food residue to settle in the exhaust channel, preventing it from flowing out through the exhaust port. Therefore, because the technical solution of this application can achieve multiple bubble breakages, it effectively solves the problem of poor bubble breakage in related technologies.

[0007] Furthermore, both the first and / or second exhaust channels include multiple channel segments connected in sequence, forming a reversible flow channel. This reversible flow channel allows for a longer exhaust channel length, thus requiring a longer flow time for the bubbles within the exhaust channel.

[0008] Furthermore, multiple channel segments are arranged concentrically or parallel, each channel segment being either an arc-shaped channel segment or a straight channel segment. Both the aforementioned arc-shaped and straight channel segments allow for bubble flow. Different channel segment shapes can be selected for different shell shapes, allowing for the arrangement of more channel segments. Concentric or parallel arrangement enables a more rational and compact arrangement of channel segments, thus allowing for the placement of more channel segments within a limited space.

[0009] Furthermore, the bottom surface of the exhaust structure's casing is circular, and the length of the channel segment farther from the buffer chamber in two adjacent channel segments is greater than the length of the channel segment closer to the buffer chamber, and / or, adjacent channel segments are connected by an arc-shaped connecting segment. This arrangement allows for a more reasonable ratio of channel segments and maintains a relatively long exhaust channel. The arc-shaped connecting segment makes the connection between adjacent channel segments smoother, thus allowing for smoother gas flow.

[0010] Furthermore, the air inlet is located at the end of the first exhaust channel furthest from the buffer chamber, and the exhaust outlet is located at the end of the second exhaust channel furthest from the buffer chamber. The air inlet and exhaust outlet are located at the ends of the first and second exhaust channels, respectively, so that the distance between the air inlet and exhaust outlet is large, thereby allowing the bubbles to flow a longer distance in the exhaust channel and improving the bubble breaking effect.

[0011] Furthermore, the centerline of the buffer cavity coincides with the centerline of the shell. The aforementioned buffer cavity is located at the center of the shell, and placing it at this location makes the overall layout more rational.

[0012] Furthermore, both the first and second exhaust channels are grooved structures, and the buffer chamber is a first concave cavity. The grooves and concave cavities have simple structures and are easy to install.

[0013] Furthermore, the depth of the buffer chamber is greater than the depth of the first exhaust channel and the second exhaust channel. This arrangement allows the liquid after the bubbles break to collect in the buffer chamber, facilitating user handling.

[0014] Furthermore, the exhaust structure also includes a relief cavity, which is connected to the exhaust port and is a second concave cavity. The aforementioned relief cavity is connected to the exhaust port and the exhaust pipe, and part of the exhaust pipe structure is located inside the relief cavity. On the one hand, the relief cavity can provide space for fixing the exhaust pipe, and on the other hand, the relief cavity can also buffer the gas, preventing excessive impact force when the gas is discharged through the pressure relief valve.

[0015] Furthermore, the air inlet is located on the side wall of the housing, and the distance between the air inlet and the top surface of the housing is less than the distance between the air inlet and the bottom surface of the housing. This arrangement prevents food residue from entering the exhaust channel through the air inlet, thus effectively preventing blockage of the exhaust channel.

[0016] Furthermore, the exhaust structure also includes a relief chamber, which is connected to the exhaust port. A reflux hole is provided at the bottom of the relief chamber, and a one-way valve is installed at the reflux hole. The aforementioned reflux hole allows the liquid in the relief chamber to flow back into the container, preventing excessive liquid in the relief chamber from affecting the overflow prevention effect.

[0017] Furthermore, the exhaust structure also includes a seal. A mounting groove is provided on the housing, and the seal is installed within the mounting groove. The seal includes a first sealing section surrounding the exhaust passage and the buffer chamber. This seal effectively seals the exhaust passage, preventing gas from the cooking cavity from entering the housing from other locations and affecting the spill prevention effect.

[0018] Furthermore, the first exhaust passage and / or the second exhaust passage includes multiple passage segments connected in sequence, forming a foldback flow channel. The seal also includes a second sealing section located between two adjacent passage segments. This second sealing section effectively prevents gas from flowing between the various passage segments, thereby improving the sealing effect.

[0019] According to a second aspect of the present invention, a cover assembly is provided, including a cover and a vent hole disposed on the cover. The cover assembly further includes a venting structure disposed below the cover, the venting structure being the aforementioned venting structure, with its vent outlet communicating with the vent hole. The aforementioned venting structure can effectively break bubbles and prevent overflow. Therefore, the cover assembly having this structure also has the aforementioned advantages.

[0020] Furthermore, the lid assembly also includes an exhaust pipe located at the vent and a pressure relief valve located on the exhaust pipe. The aforementioned pressure relief valve can control the pressure inside the container, thereby effectively shortening the cooking time of food and improving the taste of the cooked food.

[0021] Furthermore, the exhaust structure also includes a clearance cavity, which communicates with the exhaust port. The clearance cavity is a second concave cavity into which the bottom of the exhaust pipe extends. The aforementioned clearance cavity provides space for the installation of the exhaust pipe.

[0022] Furthermore, the bottom surface of the exhaust structure's casing is circular, and the ratio between the outer diameter D1 of the casing and the outer diameter D2 of the cover is in the range of 0.65-0.86. This ratio setting ensures that the exhaust channel is long enough while also allowing the casing to make reasonable use of space.

[0023] Furthermore, the exhaust structure is detachably mounted on the cover. This exhaust structure is easy to install, and users can easily disassemble and clean it themselves.

[0024] According to a third aspect of the present invention, a cooking appliance is provided, including a lid assembly, which is the lid assembly described above. The lid assembly described above is capable of effectively breaking bubbles and is easy for the user to clean; therefore, the cooking appliance having this lid assembly also has the aforementioned advantages. Attached Figure Description

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

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

[0027] Figure 2 It shows Figure 1 A top view of the exhaust structure;

[0028] Figure 3 It shows Figure 2 A cross-sectional schematic diagram of the exhaust structure;

[0029] Figure 4 It shows Figure 3 A three-dimensional structural diagram of the sealing element of the exhaust structure;

[0030] Figure 5 A three-dimensional structural schematic diagram of an embodiment of the cover assembly according to the present invention is shown;

[0031] Figure 6 It shows Figure 5 An exploded structural diagram of the cover assembly;

[0032] Figure 7 A perspective structural schematic diagram of an embodiment of a cooking appliance according to the present invention is shown; and

[0033] Figure 8 It shows Figure 7 A three-dimensional structural diagram of a cooking utensil.

[0034] The above figures include the following reference numerals:

[0035] 10. Housing; 11. Mounting groove; 20. Exhaust passage; 21. Air inlet; 22. Exhaust outlet; 23. First exhaust passage; 24. Second exhaust passage; 25. Passage section; 26. Arc-shaped connecting section; 30. Buffer chamber; 31. First concave cavity; 40. Clearance chamber; 41. Second concave cavity; 42. Return hole; 43. One-way valve; 50. Seal; 51. First sealing section; 52. Second sealing section; 60. Cover; 61. Exhaust hole; 62. Exhaust pipe; 63. Pressure relief valve. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] like Figure 1 and Figure 2 As shown, in Embodiment 1, the exhaust structure includes: a housing 10, an exhaust channel 20, and a buffer chamber 30. The housing 10 is made of plastic or metal. The exhaust channel 20 is disposed within the housing 10 and has an inlet 21 and an outlet 22. The exhaust channel 20 includes a first exhaust channel 23 and a second exhaust channel 24. The buffer chamber 30 is located between the first exhaust channel 23 and the second exhaust channel 24, and the width of the buffer chamber 30 is greater than the width of the first exhaust channel 23 and the width of the second exhaust channel 24.

[0040] Applying the technical solution of this embodiment, when bubbles enter the first exhaust channel 23 from the air inlet 21, the bubbles flow at a relatively high speed. During the flow, the bubbles come into contact with the sidewall of the first exhaust channel 23, causing them to break. Due to the buffer chamber 30, when bubbles enter, the large width of the buffer chamber 30 (i.e., the large space) reduces the flow speed of the bubbles, which facilitates gas-liquid separation. When bubbles enter the second exhaust channel 24 from the buffer chamber 30, the connection between the buffer chamber 30 and the second exhaust channel 24 is small, and the width of the second exhaust channel 24 is also small. Therefore, the bubbles will squeeze against each other, causing them to break. Simultaneously, bubbles that fail to break can continue to contact the sidewall of the second exhaust channel 24, causing them to break further. This bubble breakage allows any entrained broth or food residue to settle in the exhaust channel 20, preventing the broth or food residue from flowing out through the exhaust port 22. Therefore, since the technical solution of this embodiment can achieve multiple bubble breaking, it effectively solves the problem of poor bubble breaking effect in related technologies.

[0041] The buffer chamber is an enlarged structure relative to the first and second exhaust channels. The buffer chamber can be a long, narrow structure, such as rectangular or elliptical, in which case the width of the buffer chamber refers to its minimum width. Of course, as... Figure 1 As shown, in this embodiment, the buffer cavity 30 is circular, and the width of the buffer cavity 30 is the diameter of the circle.

[0042] To achieve a longer exhaust channel and thus a better bubble-breaking effect, such as Figure 1 and Figure 2 As shown, in Embodiment 1, both the first exhaust channel 23 and the second exhaust channel 24 include multiple channel segments 25 connected in sequence, forming a zigzag flow channel. The zigzag flow channel allows for a longer length of exhaust channel 20, thereby requiring the bubbles to flow in exhaust channel 20 for a longer period of time.

[0043] It should be noted that the aforementioned zigzag flow channel refers to a channel with a bend between two adjacent channel segments, and the included angle between the two adjacent channel segments is less than 90°, preferably less than or equal to 45° or arranged in parallel.

[0044] Of course, in embodiments not shown in the figures, as a feasible implementation, regarding the number of channel segments, multiple channel segments can be provided in the first exhaust channel and only one channel segment in the second exhaust channel; alternatively, only one channel segment can be provided in the first exhaust channel and multiple channel segments can be provided in the second exhaust channel. These methods can also improve the bubble-breaking effect, thereby improving the overflow prevention effect. Furthermore, regarding the arrangement of the channel segments, multiple channel segments can also be arranged in parallel. The arrangement of the channel segments needs to be selected according to the different shapes of the shell. When the shell is rectangular, the channel segments are arranged in parallel, which makes the arrangement of the channel segments more reasonable and allows for the arrangement of more channel segments, thus making the exhaust channel longer.

[0045] like Figure 1 and Figure 2 As shown, in Embodiment 1, multiple channel segments 25 are concentrically arranged, with each channel segment 25 being an arc-shaped channel segment. The arc-shaped channel segments are specifically designed according to the shape of the housing to make the arrangement of the channel segments 25 within the housing 10 more reasonable. The concentric arrangement allows for a more reasonable and compact arrangement of the channel segments 25, thereby enabling more channel segments 25 to be arranged within a limited space. Of course, the channel segments can also be set as straight channels, etc.

[0046] like Figure 1 and Figure 2 As shown in Embodiment 1, the bottom surface of the housing 10 of the exhaust structure is circular, and the length of the channel segment 25 farther from the buffer chamber 30 is greater than the length of the channel segment 25 closer to the buffer chamber 30 in two adjacent channel segments 25. When the length of the channel segment 25 farther from the buffer chamber 30 is greater than the length of the channel segment 25 closer to the buffer chamber 30, on the one hand, the arrangement of the channel segments 25 can be more reasonable, and on the other hand, more channel segments can be arranged in a limited space, so that the length of the exhaust channel is as long as possible.

[0047] In this embodiment, two adjacent channel segments 25 are connected by an arc-shaped connecting segment 26. The arc-shaped connecting segment 26 makes the junction of the two adjacent channel segments 25 more gradual, thereby allowing the gas to flow more smoothly.

[0048] In Embodiment 1, the first exhaust passage 23 is provided with a total of six passage segments 25, such as... Figure 2 As shown, in the first exhaust channel 23, the channel segment 25 located at the bottom (farthest from the buffer chamber) is the longest, and the channel segment 25 located at the top (closest to the buffer chamber) is the shortest. Furthermore, the lengths of multiple channel segments 25 decrease sequentially from bottom to top. The second exhaust channel 24 has a total of five channel segments 25.

[0049] In order to allow the bubbles to travel a greater distance in the exhaust channel, such as Figure 1 and Figure 2 As shown, in Embodiment 1, the air inlet 21 is located at the end of the first exhaust channel 23 away from the buffer chamber 30, and the exhaust outlet 22 is located at the end of the second exhaust channel 24 away from the buffer chamber 30. The air inlet 21 and the exhaust outlet 22 are located at the ends of the first exhaust channel 23 and the second exhaust channel 24, respectively, so that the distance between the air inlet 21 and the exhaust outlet 22 is large, thereby allowing the bubbles to flow a longer distance in the exhaust channel 20 and improving the bubble breaking effect.

[0050] like Figures 1 to 3 As shown, in Embodiment 1, the centerline of the buffer cavity 30 coincides with the centerline of the housing 10. The buffer cavity 30 is located at the center of the housing 10, effectively balancing the size of the buffer cavity 30 with the lengths of the first exhaust channel 23 and the second exhaust channel 24. Specifically, to improve the overflow prevention effect, the size of the buffer cavity 30 is as large as possible, and the lengths of the first exhaust channel 23 and the second exhaust channel 24 also need to be as long as possible. Coinciding the centerline of the buffer cavity 30 with the centerline of the housing 10 balances the dimensions of both, maximizing the size of the buffer cavity 30 while ensuring a relatively long length for the first exhaust channel 23 and the second exhaust channel 24.

[0051] Considering the difficulty of processing and the cost of manufacturing, such as Figures 1 to 3 As shown, in Embodiment 1, both the first exhaust channel 23 and the second exhaust channel 24 are groove structures, and the buffer cavity 30 is a first concave cavity 31. The groove and concave cavity have simple structures and are easy to set up.

[0052] To facilitate cleaning of the exhaust system and prevent long-term accumulation of liquid inside, such as... Figures 1 to 3 As shown, in Embodiment 1, the depth of the buffer chamber 30 is greater than the depth of the first exhaust channel 23 and the second exhaust channel 24, meaning the buffer chamber 30 is lower than the exhaust channels. This arrangement allows the liquid generated after the bubbles break to flow along the exhaust channel 20 into the buffer chamber 30, facilitating user cleaning. The buffer chamber 30 is 5 mm to 15 mm lower than the first exhaust channel 23 and 5 mm to 15 mm lower than the second exhaust channel 24. In Embodiment 1, the buffer chamber 30 is 10 mm lower than both the first and second exhaust channels 23 and 24. Specific settings can be determined based on actual conditions. This structure helps retain a portion of the liquid within the buffer chamber.

[0053] like Figure 1 and Figure 2As shown, in Embodiment 1, the exhaust structure further includes a relief cavity 40, which communicates with the exhaust port 22. The relief cavity 40 is a second concave cavity 41. The relief cavity 40 communicates with the exhaust port 22 and the exhaust pipe 62. A portion of the exhaust pipe 62 is located inside the relief cavity 40. The relief cavity 40 provides space for fixing the exhaust pipe 62 and also acts as a buffer for the gas, preventing excessive impact force when the gas is discharged through the pressure relief valve 63. The relief cavity 40 is located near the side wall of the housing 10.

[0054] If the air inlet is located at the bottom of the cover, the distance between the air bubble and the inlet is too small, allowing the air bubble to easily enter the inlet directly. The solution in Embodiment 1 effectively avoids this problem. Figure 1 and Figure 2 As shown, in Embodiment 1, the air inlet 21 is located on the side wall of the housing 10. This makes it difficult for air bubbles to enter the air inlet. To further prevent air bubbles from entering the air inlet, the distance between the air inlet 21 and the top surface of the housing 10 is less than the distance between the air inlet 21 and the bottom surface of the housing 10. That is, the air inlet 21 is located close to the upper end of the housing 10, which can further prevent food residue from entering the exhaust channel 20 through the air inlet 21, thereby effectively preventing the exhaust channel 20 from being blocked.

[0055] like Figure 1 and Figure 2 As shown, in Embodiment 1, the exhaust structure also includes a relief chamber 40, which is connected to the exhaust port 22. A return hole 42 is provided at the bottom of the relief chamber 40, and a one-way valve 43 is provided at the return hole 42. The return hole 42 allows the liquid in the relief chamber 40 to flow back into the container, preventing excessive liquid in the relief chamber 40 from affecting the overflow prevention effect.

[0056] The one-way valve 43 includes a column, a limiting member disposed at a first end of the column, and a sealing plate disposed at a second end of the column. The sealing plate is located below the housing 10, and the limiting member is located inside the housing 10. The column passes through a reflux hole, the diameter of which is larger than the diameter of the column but smaller than the diameter of the limiting member and the diameter of the sealing plate.

[0057] To improve the sealing performance of the exhaust structure, such as Figure 4 As shown, in Embodiment 1, the exhaust structure further includes a sealing element 50. A mounting groove 11 is provided on the housing 10, and the sealing element 50 is installed within the mounting groove 11. The sealing element 50 includes a first sealing section 51 surrounding the exhaust channel 20 and the buffer chamber 30. The sealing element 50 effectively seals the exhaust channel 20, preventing gas from the cooking cavity from entering the housing 10 from other locations and affecting the overflow prevention effect.

[0058] like Figure 4As shown, in Embodiment 1, the seal 50 further includes a second sealing section 52 located between two adjacent channel sections 25. The second sealing section 52 can effectively prevent gas from flowing between the respective channel sections 25, thereby improving the sealing effect.

[0059] Of course, in embodiments not shown in the figure, the exhaust channel may also include a third exhaust channel, a fourth exhaust channel, etc. In this case, a buffer chamber may be provided only between the first and second exhaust channels, or multiple buffer chambers may be provided. A buffer chamber may be provided between two adjacent exhaust channels. The above-mentioned configuration method can be selected according to the actual situation. All of the above-mentioned configuration methods can effectively achieve the function of preventing bubble breaking and overflow.

[0060] like Figure 5 and Figure 6 As shown, in Embodiment 2, a cover assembly is provided, including a cover 60 and a vent 61 disposed on the cover 60. The cover assembly also includes a venting structure disposed below the cover assembly. The venting structure is the venting structure described above, and the vent outlet 22 of the venting structure is connected to the vent 61. The venting structure described above can effectively break bubbles and prevent overflow. Therefore, the cover assembly with this structure also has the aforementioned advantages.

[0061] like Figure 5 and Figure 6 As shown, in Embodiment 2, the cover assembly further includes an exhaust pipe 62 disposed at the exhaust port 61 and a pressure limiting valve 63 disposed on the exhaust pipe 62. The pressure limiting valve 63 can control the pressure inside the container, thereby effectively shortening the cooking time of the food and improving the taste of the cooked food.

[0062] like Figure 5 and Figure 6 As shown, in Embodiment 2, the exhaust structure further includes a clearance cavity 40, which is connected to the exhaust port 22. The clearance cavity 40 is a second concave cavity 41, and the bottom of the exhaust pipe 62 extends into the clearance cavity 40. The clearance cavity 40 provides space for the installation of the exhaust pipe 62.

[0063] like Figure 5 and Figure 6 As shown in Embodiment 2, the bottom surface of the housing 10 of the exhaust structure is circular, and the ratio between the outer diameter of the housing 10 and the outer diameter of the cover 60 is 0.75. This ratio ensures that the exhaust channel is long enough and allows the housing 10 to make reasonable use of space. Of course, the above-mentioned effect can be achieved as long as the ratio between the outer diameter of the housing and the outer diameter of the cover is within the range of 0.65-0.86.

[0064] like Figure 5 and Figure 6As shown, in Embodiment 2, the exhaust structure is detachably mounted on the cover 60. The exhaust structure is easy to install and can be disassembled and cleaned by the user. Multiple connecting portions are provided on the outer wall of the housing 10, each with a first threaded hole. Similarly, a second threaded hole is provided inside the cover. The first and second threaded holes are correspondingly arranged, allowing the user to manually fix the exhaust structure to the cover using screws. In embodiments not shown in the figures, the exhaust structure can also be fixed using a snap-fit ​​structure or similar method.

[0065] like Figure 7 and Figure 8 As shown, in Embodiment 3, a cooking utensil is provided, including a lid assembly, characterized in that the lid assembly is the aforementioned lid assembly. The aforementioned lid assembly can effectively break bubbles and is easy for the user to clean; therefore, the cooking utensil having this lid assembly also has the aforementioned advantages.

[0066] like Figure 7 and Figure 8 As shown, in Embodiment 3, the cooking appliance includes a container, a lid assembly is mounted on the container, and the housing 10 is located inside the container, i.e., the exhaust structure is located inside the container. A gap is provided between the outer wall of the housing 10 and the inner wall of the container. When the pressure limiting valve 63 is opened, the gas inside the container enters through the air inlet 21, flows through the exhaust channel 20 to the clearance chamber 40, and then exits through the exhaust pipe 62. Because the exhaust channel 20 is relatively long, the time for bubbles or food residue to travel from the container to the exhaust pipe 62 is prolonged. When the pressure limiting valve 63 is in the open state, the pressure in the exhaust channel 20 is less than the pressure inside the container. Since the sealing plate of the one-way valve 43 is located on the outer side of the bottom surface of the housing, i.e., inside the container, the sealing plate is under greater pressure at this time, thus blocking the backflow hole 42. When the pressure relief valve 63 is closed, the pressure inside the container is equal to the pressure inside the exhaust channel 20. The one-way valve 43 falls under the influence of gravity, causing the reflux orifice 42 to open, allowing the liquid generated by the bursting of bubbles to flow back into the container. The reciprocating opening and closing of the pressure relief valve 63 extends the duration of each opening, thus reducing the total time required to open the lid, enabling rapid opening, and minimizing overflow.

[0067] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0068] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0069] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A venting structure for a cooking appliance, characterized in that, include: The housing (10) is made of plastic or metal; An exhaust passage (20) is provided inside the housing (10). The exhaust passage (20) has an air inlet (21) and an exhaust outlet (22). The exhaust passage (20) includes a first exhaust passage (23) and a second exhaust passage (24). A buffer chamber (30) is located between the first exhaust channel (23) and the second exhaust channel (24), and the width of the buffer chamber (30) is greater than the width of the first exhaust channel (23) and the width of the second exhaust channel (24); The first exhaust passage (23) and / or the second exhaust passage (24) include a plurality of passage segments (25) connected in sequence, and the plurality of passage segments (25) form a foldback channel.

2. The exhaust structure of the cooking appliance according to claim 1, characterized in that, Multiple channel segments (25) are arranged concentrically or in parallel, and each channel segment (25) is an arc-shaped channel segment or a straight channel segment.

3. The exhaust structure of the cooking appliance according to claim 1, characterized in that, The bottom surface of the housing (10) of the exhaust structure of the cooking appliance is circular, and the length of the channel segment (25) farther from the buffer cavity (30) in two adjacent channel segments (25) is greater than the length of the channel segment (25) closer to the buffer cavity (30), and / or, two adjacent channel segments (25) are connected by an arc-shaped connecting segment (26).

4. The exhaust structure of the cooking appliance according to claim 1, characterized in that, The air inlet (21) is located at one end of the first exhaust channel (23) away from the buffer chamber (30), and the exhaust outlet (22) is located at one end of the second exhaust channel (24) away from the buffer chamber (30).

5. The exhaust structure of the cooking appliance according to claim 1, characterized in that, The centerline of the buffer cavity (30) coincides with the centerline of the housing (10).

6. The exhaust structure of the cooking appliance according to claim 1, characterized in that, The first exhaust channel (23) and the second exhaust channel (24) are both groove structures, and the buffer cavity (30) is the first concave cavity (31).

7. The exhaust structure of the cooking appliance according to any one of claims 1 to 6, characterized in that, The depth of the buffer cavity (30) is greater than the depth of the first exhaust channel (23) and the depth of the second exhaust channel (24).

8. The exhaust structure of the cooking appliance according to any one of claims 1 to 6, characterized in that, The exhaust structure of the cooking appliance also includes a relief cavity (40), which is connected to the exhaust port (22), and the relief cavity (40) is a second concave cavity (41).

9. The exhaust structure of the cooking appliance according to any one of claims 1 to 6, characterized in that, The air inlet (21) is located on the side wall of the housing (10), and the distance between the air inlet (21) and the top surface of the housing (10) is less than the distance between the air inlet (21) and the bottom surface of the housing (10).

10. The exhaust structure of the cooking appliance according to any one of claims 1 to 6, characterized in that, The exhaust structure of the cooking appliance also includes a relief cavity (40), which is connected to the exhaust port (22). A return hole (42) is provided at the bottom of the relief cavity (40), and a one-way valve (43) is provided at the return hole (42).

11. The exhaust structure of the cooking appliance according to any one of claims 1 to 6, characterized in that, The exhaust structure of the cooking appliance also includes a sealing element (50), and the housing (10) is provided with an installation groove (11). The sealing element (50) is installed in the installation groove (11), and the sealing element (50) includes a first sealing section (51) surrounding the exhaust channel (20) and the buffer cavity (30).

12. The exhaust structure of the cooking appliance according to claim 11, characterized in that, The seal (50) also includes a second sealing section (52) located between two adjacent channel sections (25).

13. A cover assembly, comprising a cover (60) and a vent (61) disposed on the cover (60), characterized in that, The cover assembly further includes a venting structure for a cooking appliance disposed below the cover (60), wherein the venting structure for the cooking appliance is the venting structure for the cooking appliance as described in any one of claims 1 to 12, and the venting port (22) of the venting structure for the cooking appliance is connected to the venting hole (61).

14. The cover assembly according to claim 13, characterized in that, The cover assembly also includes an exhaust pipe (62) disposed at the exhaust port (61) and a pressure relief valve (63) disposed on the exhaust pipe (62).

15. The cover assembly according to claim 14, characterized in that, The exhaust structure of the cooking appliance also includes a relief cavity (40), which is connected to the exhaust port (22). The relief cavity (40) is a second concave cavity (41), and the bottom of the exhaust pipe (62) extends into the relief cavity (40).

16. The cover assembly according to claim 13, characterized in that, The bottom surface of the housing (10) of the exhaust structure of the cooking appliance is circular, and the ratio between the outer diameter D1 of the housing (10) and the outer diameter D2 of the cover (60) is in the range of 0.65-0.

86.

17. The cover assembly according to claim 13, characterized in that, The exhaust structure of the cooking appliance is detachably mounted on the cover (60).

18. A cooking utensil, comprising a lid assembly, characterized in that, The cover assembly is the cover assembly according to any one of claims 13 to 17.

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