CN212394630U - Exhaust structure, lid subassembly and cooking utensil - Google Patents

Abstract

The utility model provides an exhaust structure, lid subassembly and cooking utensil, wherein, exhaust structure includes: a housing; the exhaust passage is arranged in the shell and provided with an air inlet and an air outlet, and the exhaust passage comprises a first exhaust passage and a second exhaust passage; the buffer cavity is located between the first exhaust passage and the second exhaust passage, and the width of the buffer cavity is larger than the width of the first exhaust passage and the width of the second exhaust passage. The technical scheme of this application can solve the poor problem of broken bubble effect among the correlation technique effectively.

Description

Exhaust structure, lid subassembly and cooking utensil

Technical Field

The utility model relates to a small household appliances technical field particularly, relates to an exhaust structure, lid subassembly and cooking utensil.

Background

In order to facilitate users to cook food, the variety of cooking appliances, such as electric cookers, electric pressure cookers, and electric stewpots, is increasing. When a user cooks some food, such as porridge and soup, the cooking utensil has the problem of overflowing a pot when exhausting air. The reasons for the overflow are as follows: the porridge and puree in a liquid state may form bubbles, which are discharged from the gas outlet. The soup can be carried in the bubbles, and then the bubbles are discharged to cause overflowing. The outer surface of the cooking appliance is soiled after overflowing, and the user is easily scalded.

In the related art, a bubble breaking structure is provided on the steam valve to prevent the soup inside the container from flowing out. However, the foam breaking structure has poor foam breaking effect in the using process, and the risk of overflowing the pot is high.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an exhaust structure, a lid assembly and a cooking appliance, which solve the problem of poor bubble breaking effect in the related art.

In order to achieve the above object, according to an aspect of the present invention, there is provided an exhaust structure including: a housing; the exhaust passage is arranged in the shell and provided with an air inlet and an air outlet, and the exhaust passage comprises a first exhaust passage and a second exhaust passage; the buffer cavity is located between the first exhaust passage and the second exhaust passage, and the width of the buffer cavity is larger than the width of the first exhaust passage and the width of the second exhaust passage.

Use the technical scheme of the utility model, when the bubble entered into first exhaust passage by the air inlet during, the speed that the bubble flows was very fast, at the in-process that the bubble flows, can take place to contact with first exhaust passage's lateral wall, and then makes the bubble breakage. Due to the arrangement of the buffer cavity, when bubbles enter the buffer cavity, the width of the buffer cavity is large, namely the space of the buffer cavity is large, so that the flowing speed of the bubbles can be reduced, and the gas-liquid separation can be favorably realized by reducing the flow speed of the bubbles. When the bubbles enter the second exhaust channel from the buffer cavity, the communication position of the buffer cavity and the second exhaust channel is small, and the width of the second exhaust channel is small, so that the bubbles can be mutually extruded to realize extrusion and bubble breaking. Meanwhile, after bubbles which cannot be broken enter the second exhaust channel, the bubbles can be continuously contacted with the side wall of the second exhaust channel so as to be broken continuously. The bubble breakage can make the soup or food residue carried in the bubbles deposit in the exhaust passage, and then can prevent the bubbles from carrying the soup or food residue and flowing out through the exhaust port. Therefore, the technical scheme of the application can realize multiple times of bubble breaking, and further effectively solves the problem of poor bubble breaking effect in the related technology.

Further, the first exhaust channel and/or the second exhaust channel respectively comprise a plurality of channel sections which are communicated in sequence, and the plurality of channel sections form a return flow channel. The turn-back flow channel can enable the length of the exhaust channel to be longer, and further enables the time that bubbles need to flow in the exhaust channel to be longer

Further, a plurality of channel segments are concentrically arranged or arranged in parallel, and each channel segment is an arc-shaped channel segment or a straight-line channel segment. The arc-shaped channel section or the straight channel section can enable air bubbles to flow. Different shapes of channel segments may be selected for different shapes of housing, so that more channel segments can be arranged. The concentric arrangement or the parallel arrangement can enable the arrangement of the channel sections to be more reasonable and compact, and further more channel sections can be arranged in a limited space.

Further, the bottom surface of the shell of the exhaust structure is circular, the length of the channel section far away from the buffer cavity in the two adjacent channel sections is larger than that of the channel section close to the buffer cavity, and/or the two adjacent channel sections are connected through an arc-shaped connecting section. The arrangement mode can enable the ratio of the channel section to be more reasonable when the exhaust is carried out, and enable the length of the exhaust channel to be longer. The arc connecting section can enable the joint of two adjacent channel sections to be more moderate, and then the gas can flow more smoothly in the flowing process.

Further, the air inlet is located at one end, far away from the buffer cavity, of the first exhaust channel, and the air outlet is located at one end, far away from the buffer cavity, of the second exhaust channel. Foretell air inlet and gas vent are located first exhaust passage and second exhaust passage's tip respectively to make the distance between air inlet and the gas vent great, and then can make the distance that the bubble flows in exhaust passage longer, promote broken bubble effect.

Further, the center line of the buffer cavity coincides with the center line of the housing. The buffer cavity is located in the center of the shell, and the buffer cavity is arranged in the position, so that the overall arrangement is more reasonable.

Furthermore, the first exhaust passage and the second exhaust passage are both groove structures, and the buffer cavity is a first concave cavity. The grooves and the concave cavities are simple in structure and convenient to arrange.

Further, the depth of the buffer chamber is greater than the depth of the first exhaust passage and the depth of the second exhaust passage. The arrangement can enable the liquid after the bubbles are broken to be gathered in the buffer cavity, and the liquid is convenient for a user to handle.

Further, the exhaust structure further comprises an avoiding cavity, the avoiding cavity is communicated with the exhaust port, and the avoiding cavity is a second concave cavity. Foretell dodge the chamber and gas vent and blast pipe intercommunication, the partial structure of blast pipe is located the inside of dodging the chamber, dodges the chamber and can provide the space for the fixed of blast pipe on the one hand, and on the other hand dodges the chamber and can also play buffer gas's effect, and the impact force when can preventing gaseous passing through the pressure limiting valve discharge is too big.

Further, the air inlet is located on the side wall of the shell, and the distance between the air inlet and the top surface of the shell is smaller than the distance between the air inlet and the bottom surface of the shell. The arrangement can prevent food residues from entering the exhaust channel through the air inlet, and further can effectively prevent the exhaust channel from being blocked.

Furthermore, the exhaust structure further comprises an avoiding cavity, the avoiding cavity is communicated with the exhaust port, a backflow hole is formed in the bottom of the avoiding cavity, and a one-way valve is arranged at the backflow hole. The backflow hole can enable liquid in the avoiding cavity to flow back to the container, and the situation that the overflow prevention effect is influenced due to the fact that too much liquid in the avoiding cavity is avoided.

Further, exhaust structure still includes the sealing member, is provided with the mounting groove on the casing, and the sealing member is installed in the mounting groove, and the sealing member includes the first seal section around exhaust passage and cushion chamber outside. The sealing piece can effectively seal the exhaust channel, and prevent gas in the cooking cavity from entering the shell from other positions to influence the anti-overflow effect.

Further, the first exhaust channel and/or the second exhaust channel comprise a plurality of channel sections which are communicated in sequence, the channel sections form a return flow channel, and the sealing element further comprises a second sealing section which is located between two adjacent channel sections. The second sealing section can effectively prevent the gas in each channel section from flowing mutually, and further improves the sealing effect.

According to the utility model discloses a second aspect provides a lid subassembly, including lid and the exhaust hole of setting on the lid, lid subassembly is still including setting up the exhaust structure in the lid below, and exhaust structure is foretell exhaust structure, and exhaust structure's gas vent is linked together with the exhaust hole. The exhaust structure can effectively break bubbles and prevent overflow. Therefore, the cover assembly with the structure also has the advantages.

Furthermore, the cover body assembly also comprises an exhaust pipe arranged at the exhaust hole and a pressure limiting valve arranged on the exhaust pipe. The pressure limiting valve can control the pressure inside the container, so that the cooking time of food can be effectively shortened, and the mouthfeel of the cooked food is improved.

Further, the exhaust structure further comprises an avoiding cavity, the avoiding cavity is communicated with the exhaust port and is a second concave cavity, and the bottom of the exhaust pipe extends into the avoiding cavity. The avoidance cavity provides space for the installation of the exhaust pipe.

Further, the bottom surface of the case of the exhaust structure is circular, and the ratio of the outer diameter D1 of the case to the outer diameter D2 of the cover is in the range of 0.65-0.86. The above-mentioned proportion sets up on the one hand and can guarantee that exhaust passage's length is enough long, on the other hand can make the casing rationally utilize the space.

Further, the exhaust structure is detachably disposed on the cover body. The exhaust structure is convenient to install, and a user can disassemble and assemble the exhaust structure by himself, so that the exhaust structure is convenient to clean.

According to a third aspect of the present invention, there is provided a cooking appliance, comprising a cover assembly, the cover assembly being the above-mentioned cover assembly. The cover body assembly can effectively break bubbles and is convenient for a user to clean, so that the cooking appliance with the cover body assembly also has the advantages.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of an exhaust structure according to the present invention;

FIG. 2 shows a schematic top view of the venting structure of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of the exhaust structure of FIG. 2;

FIG. 4 illustrates a perspective view of a seal of the venting structure of FIG. 3;

fig. 5 shows a schematic perspective view of an embodiment of a cover assembly according to the present invention;

FIG. 6 is an exploded view of the cover assembly of FIG. 5;

fig. 7 shows a schematic perspective view of an embodiment of a cooking appliance according to the present invention; and

fig. 8 shows a perspective view of the cooking appliance of fig. 7.

Wherein the figures include the following reference numerals:

10. a housing; 11. mounting grooves; 20. an exhaust passage; 21. an air inlet; 22. an exhaust port; 23. a first exhaust passage; 24. a second exhaust passage; 25. a channel section; 26. an arc-shaped connecting section; 30. a buffer chamber; 31. a first cavity; 40. an avoidance cavity; 41. a second cavity; 42. a return orifice; 43. a one-way valve; 50. a seal member; 51. a first seal section; 52. a second seal section; 60. a cover body; 61. an exhaust hole; 62. an exhaust pipe; 63. a pressure limiting valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 and 2, in the first embodiment, the exhaust structure includes: a housing 10, an exhaust passage 20, and a buffer chamber 30. An exhaust passage 20 provided in the housing 10, the exhaust passage 20 having an intake port 21 and an exhaust port 22, the exhaust passage 20 including a first exhaust passage 23 and a second exhaust passage 24; and a buffer chamber 30 between the first exhaust passage 23 and the second exhaust passage 24, the buffer chamber 30 having a width greater than the width of the first exhaust passage 23 and the width of the second exhaust passage 24.

By applying the technical scheme of the embodiment, when the air bubbles enter the first exhaust channel 23 from the air inlet 21, the flowing speed of the air bubbles is high, and the air bubbles can contact with the side wall of the first exhaust channel 23 in the flowing process of the air bubbles, so that the air bubbles are broken. Due to the arrangement of the buffer cavity 30, when bubbles enter the buffer cavity 30, the width of the buffer cavity 30 is large, namely the space of the buffer cavity 30 is large, so that the flowing speed of the bubbles can be reduced, and the gas-liquid separation can be favorably realized by reducing the flow speed of the bubbles. When the air bubbles enter the second air exhaust channel 24 from the buffer cavity 30, the communication part of the buffer cavity 30 and the second air exhaust channel 24 is smaller, and the width of the second air exhaust channel 24 is also smaller, so that the air bubbles can be mutually extruded to realize extrusion and breaking of the air bubbles. Meanwhile, after the bubbles which cannot be broken enter the second air exhaust channel 24, the bubbles can continuously contact with the side wall of the second air exhaust channel 24, so that the bubbles are continuously broken. The bubble breakup enables the soup or food waste entrained in the bubbles to be deposited in the exhaust passage 20, and thus prevents the bubbles from entraining the soup or food waste to flow out through the exhaust port 22. Therefore, the technical scheme of the embodiment can realize multiple times of bubble breaking, and further effectively solves the problem of poor bubble breaking effect in the related technology.

The buffer chamber is an enlarged structure with respect to the first exhaust passage and the second exhaust passage. The buffer chamber may have an elongated configuration, such as a rectangular or oval configuration, and the width of the buffer chamber refers to the minimum width of the buffer chamber. Of course, as shown in fig. 1, in the present embodiment, the buffer chamber 30 is circular, and the width of the buffer chamber 30 is the diameter of the circle.

In order to make the length of the exhaust passage longer and obtain better bubble breaking effect, as shown in fig. 1 and fig. 2, in the first embodiment, the first exhaust passage 23 and the second exhaust passage 24 each include a plurality of passage sections 25 which are communicated in sequence, and the plurality of passage sections 25 form a return flow passage. The turn-back flow path enables the length of the exhaust passage 20 to be long, and thus the time required for bubbles to flow in the exhaust passage 20 to be long.

It should be noted that the above-mentioned reentrant flow path means that a bend is disposed between two adjacent channel segments, and an included angle between two adjacent channel segments is less than 90 °, preferably less than or equal to 45 °, or is disposed in parallel.

Of course, in the embodiment not shown in the figures, in terms of the number of channel segments, as a possible embodiment, there may be provided a plurality of channel segments in the first exhaust passage, and only one channel segment in the second exhaust passage; alternatively, only one passage section may be provided in the first exhaust passage, and a plurality of passage sections may be provided in the second exhaust passage. The above mode also can improve broken bubble effect, and then improves the anti-overflow effect. In addition, a plurality of channel segments can also be arranged in parallel with respect to the arrangement of the channel segments. The setting mode of passageway section needs to select according to the casing of different shapes, and when the casing was the rectangle, passageway section parallel arrangement can make the arranging of passageway section more reasonable like this, can arrange more passageway sections equally, and then makes exhaust passage's length longer.

As shown in fig. 1 and 2, in the first embodiment, a plurality of channel segments 25 are concentrically arranged, and each channel segment 25 is an arc-shaped channel segment. The arcuate channel sections are specifically configured according to the shape of the housing to make the arrangement of the channel sections 25 inside the housing 10 more reasonable. The concentric arrangement enables a more rational and compact arrangement of the channel segments 25, which in turn enables a larger number of channel segments 25 to be arranged in a limited space. Of course the channel segments may also be arranged as straight channels etc.

As shown in fig. 1 and 2, in the first embodiment, the bottom surface of the casing 10 of the air discharge structure is circular, and the length of the channel section 25 far away from the buffer chamber 30 is greater than the length of the channel section 25 near the buffer chamber 30 in two adjacent channel sections 25. When the length of the channel section 25 away from the buffer cavity 30 is greater than the length of the channel section 25 close to the buffer cavity 30, on one hand, the arrangement of the channel section 25 can be more reasonable, and on the other hand, more channel sections can be arranged in a limited space, namely, the length of the exhaust channel is as long as possible.

In the present embodiment, two adjacent channel segments 25 are connected by an arc-shaped connecting segment 26. The arc-shaped connecting section 26 can make the junction of two adjacent channel sections 25 more moderate, so that the gas can flow more smoothly.

In the first embodiment, the first exhaust passage 23 is provided with six passage segments 25 in total, and as shown in fig. 2, in the first exhaust passage 23, the passage segment 25 located at the lower side in the drawing (farthest from the buffer chamber) has the longest length, the passage segment 25 located at the upper side in the drawing (closest to the buffer chamber) has the shortest length, and the lengths of the plurality of passage segments 25 decrease in order in the direction from the bottom to the top. The second exhaust passage 24 is provided with five passage sections 25 in total.

In order to enable the bubbles to move a greater distance in the exhaust passage, as shown in fig. 1 and 2, in the first embodiment, the air inlet 21 is located at one end of the first exhaust passage 23 away from the buffer chamber 30, and the air outlet 22 is located at one end of the second exhaust passage 24 away from the buffer chamber 30. The air inlet 21 and the air outlet 22 are respectively arranged at the end parts of the first air outlet channel 23 and the second air outlet channel 24, so that the distance between the air inlet 21 and the air outlet 22 is larger, the distance for the bubbles to flow in the air outlet channel 20 is longer, and the bubble breaking effect is improved.

As shown in fig. 1 to 3, in the first embodiment, the center line of the buffer chamber 30 coincides with the center line of the housing 10. The buffer chamber 30 is located at the center of the casing 10, and the size of the buffer chamber 30 and the lengths of the first exhaust passage 23 and the second exhaust passage 24 can be effectively considered. Specifically, in order to improve the spill-proof effect, the size of the buffer chamber 30 is as large as possible, and at the same time, the lengths of the first exhaust passage 23 and the second exhaust passage 24 are required to be as long as possible. The center line of the cushion chamber 30 and the center line of the casing 10 are overlapped with each other, so that both the sizes can be compatible, the size of the cushion chamber 30 can be enlarged as much as possible, and the lengths of the first exhaust passage 23 and the second exhaust passage 24 can be ensured to be long.

In consideration of the difficulty in manufacturing and the manufacturing cost, as shown in fig. 1 to 3, in the first embodiment, the first exhaust passage 23 and the second exhaust passage 24 are both groove structures, and the buffer chamber 30 is a first cavity 31. The grooves and the concave cavities are simple in structure and convenient to arrange.

To facilitate cleaning of a gas discharge structure by a user and prevent liquid from accumulating in the gas discharge structure for a long period of time. As shown in fig. 1 to 3, in the first embodiment, the depth of the buffer chamber 30 is greater than the depth of the first exhaust passage 23 and the depth of the second exhaust passage 24, that is, the buffer chamber 30 is lower than the exhaust passage. Through the arrangement, liquid generated after the bubbles are broken can flow into the buffer cavity 30 along the air exhaust channel 20, and the cleaning by a user is facilitated. The buffer chamber 30 is 5 mm to 15 mm lower than the first exhaust passage 23, and the buffer chamber 30 is 5 mm to 15 mm lower than the second exhaust passage 24. In the first embodiment, the buffer chamber 30 is 10 mm lower than the first exhaust passage 23 and 10 mm lower than the second exhaust passage 24. The specific setting can be determined according to actual conditions. The structure is favorable for keeping a part of liquid in the buffer cavity.

As shown in fig. 1 and 2, in the first embodiment, the exhaust structure further includes an evacuation chamber 40, the evacuation chamber 40 is communicated with the exhaust port 22, and the evacuation chamber 40 is a second concave cavity 41. The avoiding cavity 40 is communicated with the exhaust port 22 and the exhaust pipe 62, part of the structure of the exhaust pipe 62 is located inside the avoiding cavity 40, on one hand, the avoiding cavity 40 can provide a space for fixing the exhaust pipe 62, on the other hand, the avoiding cavity 40 can also play a role of buffering gas, and the impact force of the gas when the gas is exhausted through the pressure limiting valve 63 can be prevented from being too large. The bypass chamber 40 is disposed in the housing 10 adjacent to the sidewall.

If the air inlet is arranged at the bottom of the cover body, the distance between the air bubbles and the air inlet is easy to be smaller, and the air bubbles are easy to directly enter the air inlet. The solution of embodiment one effectively avoids the above-mentioned problems. As shown in fig. 1 and 2, in the first embodiment, the air inlet 21 is located on a side wall of the housing 10. So that air bubbles do not easily enter the air inlet. To further prevent air bubbles from entering into the air inlet, the distance between the air inlet 21 and the top surface of the housing 10 is smaller than the distance between the air inlet 21 and the bottom surface of the housing 10. That is, the air inlet 21 is disposed near the upper end of the housing 10, so that the food residue can be prevented from entering the air discharge passage 20 through the air inlet 21, and the air discharge passage 20 can be effectively prevented from being blocked.

As shown in fig. 1 and 2, in the first embodiment, the exhaust structure further includes an avoiding cavity 40, the avoiding cavity 40 is communicated with the exhaust port 22, a backflow hole 42 is formed at the bottom of the avoiding cavity 40, and a check valve 43 is arranged at the backflow hole 42. The backflow hole 42 enables the liquid in the avoidance cavity 40 to flow back into the container, and the situation that the overflow prevention effect is influenced due to the fact that too much liquid is in the avoidance cavity 40 is avoided.

The one-way valve 43 comprises a cylinder, a limiting member disposed at a first end of the cylinder, and a blocking piece disposed at a second end of the cylinder, wherein the blocking piece is located below the housing 10, and the limiting member is located inside the housing 10. The cylinder passes through the backward flow hole, and the diameter in backward flow hole is greater than the diameter of cylinder, is less than the diameter of spacing portion and the diameter of shutoff piece.

In order to improve the sealing performance of the exhaust structure, as shown in fig. 4, in the first embodiment, the exhaust structure further includes a sealing member 50, the housing 10 is provided with a mounting groove 11, the sealing member 50 is mounted in the mounting groove 11, and the sealing member 50 includes a first sealing section 51 surrounding the exhaust passage 20 and the buffer chamber 30. The sealing member 50 can effectively seal the exhaust passage 20 and prevent gas in the cooking cavity from entering the housing 10 from other positions, which affects the anti-overflow effect.

As shown in fig. 4, in the first embodiment, the sealing member 50 further includes a second sealing section 52 located between two adjacent channel sections 25. The second seal section 52 can effectively prevent the gas in each channel section 25 from flowing to each other, thereby improving the sealing effect.

Of course, in embodiments not shown in the figures, the exhaust passages may also include a third exhaust passage, a fourth exhaust passage, and so on. In this case, the buffer chamber may be provided only between the first exhaust passage and the second exhaust passage, or a plurality of buffer chambers may be provided. A buffer chamber is arranged between two adjacent exhaust passages. The above arrangement may be selected according to actual conditions. The arrangement mode can effectively realize the functions of breaking bubbles and preventing overflow.

As shown in fig. 5 and fig. 6, in the second embodiment, a cover assembly is provided, which includes a cover 60 and an exhaust hole 61 disposed on the cover 60, and the cover assembly further includes an exhaust structure disposed under the cover assembly, the exhaust structure is the above exhaust structure, and the exhaust port 22 of the exhaust structure is communicated with the exhaust hole 61. The exhaust structure can effectively break bubbles and prevent overflow. Therefore, the cover assembly with the structure also has the advantages.

As shown in fig. 5 and 6, in the second embodiment, the cover assembly further includes an exhaust pipe 62 provided at the exhaust hole 61 and a pressure limiting valve 63 provided on the exhaust pipe 62. The pressure limiting valve 63 can control the pressure inside the container, so that the cooking time of food can be effectively shortened, and the taste of the cooked food is improved.

As shown in fig. 5 and 6, in the second embodiment, the exhaust structure further includes an evacuation chamber 40, the evacuation chamber 40 is communicated with the exhaust port 22, the evacuation chamber 40 is a second concave cavity 41, and the bottom of the exhaust pipe 62 extends into the evacuation chamber 40. The bypass chamber 40 provides space for the exhaust tube 62 to be installed.

As shown in fig. 5 and 6, in the second embodiment, the bottom surface of the casing 10 of the exhaust structure is circular, and the ratio between the outer diameter of the casing 10 and the outer diameter of the cover 60 is 0.75, which can ensure the length of the exhaust passage to be long enough and can make the casing 10 use space reasonably. Of course, the ratio of the outer diameter of the housing to the outer diameter of the cover can be in the range of 0.65 to 0.86.

As shown in fig. 5 and 6, in the second embodiment, the air discharge structure is detachably provided on the lid body 60. The exhaust structure is convenient to install, and a user can disassemble and assemble the exhaust structure by himself, so that the exhaust structure is convenient to clean. The outer side wall of the shell 10 is provided with a plurality of connecting portions, the connecting portions are provided with first threaded holes, similarly, second threaded holes are formed in the cover body, the first threaded holes and the second threaded holes are correspondingly arranged, and a user can fix the exhaust structure to the cover body manually by using screws. In embodiments not shown in the figures, the exhaust structure may also be secured by snap-fit structures or the like.

In a third embodiment, as shown in fig. 7 and 8, a cooking appliance is provided, which comprises a cover assembly, wherein the cover assembly is the above-mentioned cover assembly. The cover body assembly can effectively break bubbles and is convenient for a user to clean, so that the cooking appliance with the cover body assembly also has the advantages.

In a third embodiment, as shown in fig. 7 and 8, the cooking utensil comprises a container, the cover assembly is mounted on the container, the housing 10 is located inside the container, i.e. the venting structure is located inside the container, and a space is provided between the outer side wall of the housing 10 and the inner side wall of the container. When the pressure limiting valve 63 is opened, the gas in the container enters from the gas inlet 21, passes through the gas exhaust channel 20, flows to the avoidance cavity 40 and is exhausted from the gas exhaust pipe 62, and the gas bubbles or food residues are exhausted from the container to the gas exhaust pipe 62 due to the fact that the gas exhaust channel 20 is long. When the pressure limiting valve 63 is in the open state, the pressure in the air discharge passage 20 is lower than the pressure inside the container, and since the blocking piece of the check valve 43 is located outside the bottom surface of the housing, i.e. inside the container, the pressure applied to the blocking piece is higher, so that the backflow hole 42 can be blocked. When the pressure limiting valve 63 is in the closed state, the pressure inside the container is equal to the pressure inside the air discharging passage 20, the check valve 43 falls down under the action of gravity, so that the backflow hole 42 is in the open state, and the liquid generated by breaking the bubbles can flow back to the inside of the container. In the reciprocating movement of opening and closing the pressure limiting valve 63, the duration of opening the pressure limiting valve 63 each time can be prolonged, so that the total time of opening the cover is reduced, the quick opening of the cover is realized, and the overflow of the cooker is reduced.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and 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 interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (19)

1. An exhaust structure, comprising:

a housing (10);

an exhaust passage (20) provided in the housing (10), the exhaust passage (20) having an intake port (21) and an exhaust port (22), the exhaust passage (20) including a first exhaust passage (23) and a second exhaust passage (24);

a buffer chamber (30) located between the first exhaust passage (23) and the second exhaust passage (24), the buffer chamber (30) having a width greater than a width of the first exhaust passage (23) and a width of the second exhaust passage (24).

2. An exhaust structure according to claim 1, characterized in that the first exhaust passage (23) and/or the second exhaust passage (24) includes a plurality of passage sections (25) that communicate in sequence, the plurality of passage sections (25) forming a turn-back flow passage.

3. The exhaust structure according to claim 2, wherein a plurality of the channel segments (25) are arranged concentrically or in parallel, each of the channel segments (25) being an arc-shaped channel segment or a straight channel segment.

4. The exhaust structure according to claim 2, characterized in that the bottom surface of the housing (10) of the exhaust structure is circular, the length of the channel section (25) far away from the buffer chamber (30) in two adjacent channel sections (25) is larger than the length of the channel section (25) near the buffer chamber (30), and/or the two adjacent channel sections (25) are connected by an arc-shaped connecting section (26).

5. An exhaust structure according to claim 1, characterized in that the air inlet (21) is located at an end of the first exhaust passage (23) remote from the buffer chamber (30), and the air outlet (22) is located at an end of the second exhaust passage (24) remote from the buffer chamber (30).

6. Exhaust structure according to claim 1, characterized in that the centre line of the buffer chamber (30) coincides with the centre line of the housing (10).

7. The exhaust structure according to claim 1, wherein the first exhaust passage (23) and the second exhaust passage (24) are each a groove structure, and the buffer chamber (30) is a first cavity (31).

8. Exhaust structure according to any of claims 1 to 7, characterized in that the depth of the buffer chamber (30) is greater than the depth of the first exhaust channel (23) and the depth of the second exhaust channel (24).

9. The exhaust structure according to any one of claims 1 to 7, further comprising an evacuation chamber (40), the evacuation chamber (40) communicating with the exhaust port (22), the evacuation chamber (40) being a second cavity (41).

10. The exhaust structure according to any one of claims 1 to 7, characterized in that the intake port (21) is located on a side wall of the housing (10), and a distance between the intake port (21) and a top surface of the housing (10) is smaller than a distance between the intake port (21) and a bottom surface of the housing (10).

11. The exhaust structure according to any one of claims 1 to 7, further comprising an avoiding cavity (40), wherein the avoiding cavity (40) is communicated with the exhaust port (22), a backflow hole (42) is formed in the bottom of the avoiding cavity (40), and a check valve (43) is arranged at the backflow hole (42).

12. The exhaust structure according to any one of claims 1 to 7, further comprising a sealing member (50), wherein a mounting groove (11) is provided on the housing (10), the sealing member (50) is mounted in the mounting groove (11), and the sealing member (50) includes a first sealing section (51) surrounding the exhaust passage (20) and the buffer chamber (30) outside.

13. The exhaust structure according to claim 12, characterized in that the first exhaust passage (23) and/or the second exhaust passage (24) includes a plurality of passage sections (25) that communicate in sequence, the plurality of passage sections (25) forming a turn-around flow passage, and the seal member (50) further includes a second seal section (52) between adjacent two of the passage sections (25).

14. A cover assembly comprising a cover (60) and a vent hole (61) provided in the cover (60), characterized in that the cover assembly further comprises a venting structure provided under the cover (60), the venting structure being as claimed in any one of claims 1 to 13, the vent hole (61) being in communication with the vent hole (22) of the venting structure.

15. The cover assembly according to claim 14, further comprising an exhaust tube (62) provided at the exhaust hole (61) and a pressure limiting valve (63) provided on the exhaust tube (62).

16. The cover assembly of claim 15, wherein the venting structure further comprises an evacuation chamber (40), the evacuation chamber (40) is in communication with the vent (22), the evacuation chamber (40) is a second cavity (41), and a bottom of the vent tube (62) extends into the evacuation chamber (40).

17. The cover assembly of claim 14, wherein the bottom surface of the housing (10) of the venting structure 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.

18. The cover assembly of claim 14, wherein the venting structure is removably disposed on the cover (60).

19. A cooking appliance comprising a lid assembly, wherein the lid assembly is as claimed in any one of claims 14 to 18.

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