CN216438998U - Exhaust box and cooking utensil - Google Patents

Abstract

The utility model provides an exhaust box and a cooking appliance, wherein the exhaust box comprises: a first case; the second box body is arranged inside the first box body, and the inner side of the second box body is provided with a pressure limiting valve accommodating cavity; the exhaust channel is arranged between the first box body and the second box body, the inlet of the exhaust channel is communicated with the pressure limiting valve accommodating cavity, and the outlet of the exhaust channel is communicated with the outside of the exhaust box; the first backflow groove is arranged on the top wall of the second box body and is downwards inclined from the center of the second box body to the edge. The technical scheme of this application can solve the problem that the easy gathering of the comdenstion water influences the exhaust effect at the top of the exhaust box of inlayer among the correlation technique effectively.

Description

Exhaust box and cooking utensil

Technical Field

The utility model relates to the technical field of small household appliances, in particular to an exhaust box and a cooking appliance.

Background

In the related art, the pressure cooking appliance boils and rolls the liquid in the cooking cavity by different powers while cooking the food, and the food is cooked by intermittent exhaust; the steam is discharged out of the cooking utensil through the exhaust valve, and the steam gas generates irregular movement in the discharging process to generate larger noise.

In order to solve the noise problem, a double-layer exhaust box can be arranged on the outer side of the exhaust valve, so that the path in the steam gas exhaust process can be lengthened, the flow speed of steam is reduced, the steam can flow orderly and uniformly, and the airflow noise is reduced. Because the route in the steam gas discharge process has been lengthened to setting up like this, some steam can become the comdenstion water in the motion process, and the exhaust effect is influenced at the top of the exhaust box of inlayer in comdenstion water gathering, and the comdenstion water gathering to certain degree just can be left along the lateral wall of the exhaust box of inlayer.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an exhaust box and a cooking utensil, and aims to solve the problem that in the related art, condensed water is easy to collect on the top of the exhaust box of an inner layer to influence the exhaust effect.

In order to achieve the above object, according to one aspect of the present invention, there is provided an exhaust cassette including: a first case; the second box body is arranged inside the first box body, and the inner side of the second box body is provided with a pressure limiting valve accommodating cavity; the exhaust channel is arranged between the first box body and the second box body, the inlet of the exhaust channel is communicated with the pressure limiting valve accommodating cavity, and the outlet of the exhaust channel is communicated with the outside of the exhaust box; the first backflow groove is arranged on the top wall of the second box body and is downwards inclined from the center of the second box body to the edge.

By applying the technical scheme of the utility model, the exhaust box comprises: the first box body, the second box body, the exhaust passage and the first backflow groove. The first box body and the second box body are nested, the exhaust channel is arranged between the first box body and the second box body, the inlet of the exhaust channel is communicated with the pressure limiting valve accommodating cavity, and the outlet of the exhaust channel is communicated with the outside of the exhaust box. The steam discharged from the pressure limiting valve is discharged to the outer side of the cooking utensil along the exhaust channel, the length of the exhaust channel is long, the flowing speed of the steam can be reduced, the steam can flow orderly and uniformly, and then the airflow noise is reduced. Simultaneously, be provided with first backwash groove on the roof of second box body, first backwash groove downward sloping setting in the direction of center to border of second box body, first backwash groove can be with producing the border department that the comdenstion water guided to the second box body at the top of first box body and second box body, avoids the comdenstion water gathering to influence exhaust effect at the top of second box body. Therefore, the technology of the present application can effectively solve the problem that the condensed water in the related art is easily accumulated on the top of the exhaust box of the inner layer to affect the exhaust effect.

Further, the exhaust box also comprises a second backflow groove arranged on the outer side wall of the second box body, and the second backflow groove is communicated with the first backflow groove. The comdenstion water of border department of leading to the second box body through first backwash groove can flow back to the culinary art intracavity along the second backwash groove, avoids the comdenstion water gathering to influence exhaust effect at second box body top.

Further, the first return flow groove extends in a radial direction of the second container, and/or the second return flow groove extends in a height direction of a sidewall of the second container. This can make the return path of the condensed water the shortest, and this can make the processing of the exhaust box simpler at the same time.

Further, the width along the first backflow groove is gradually increased from the center of the second box body to the edge. This will make the collection of comdenstion water more smooth and easy, the easier processing of first backwash groove simultaneously.

Furthermore, the groove wall of the first backflow groove comprises a first flow guide surface and a second flow guide surface, wherein the first flow guide surface is obliquely arranged, and the lower edge of the first flow guide surface is intersected with the lower edge of the second flow guide surface. The lower edge of the first flow guide surface and the lower edge of the second flow guide surface are intersected to form a V-shaped groove, so that the collection of condensed water can be smoother, and the condensed water cannot be gathered in the first flow return groove.

Further, the second backflow groove comprises a third flow guide surface arranged in an inclined mode, a fourth flow guide surface arranged in an inclined mode and a fifth flow guide surface arranged between the third flow guide surface and the fourth flow guide surface. The third flow guide surface, the fourth flow guide surface and the fifth flow guide surface can effectively guide the condensed water, so that the condensed water can flow downwards.

Further, the exhaust passage comprises a plurality of bending flow channels, the number of the first backflow grooves and the number of the second backflow grooves are multiple, and the second backflow grooves and the bending flow channels are arranged in a staggered mode along the circumferential direction of the second box body. The second backflow groove and the bending flow channel are arranged in a staggered mode, so that the amount of condensed water collected by the first backflow grooves and the second backflow grooves is uniform. Meanwhile, the bent flow channel can prolong the discharge path of steam, further reduce the movement speed of the steam and ensure the noise reduction effect.

Further, an exhaust area is arranged between every two adjacent second backflow grooves, a plurality of first blocking ribs and a plurality of second blocking ribs are arranged in the exhaust area, and the first blocking ribs and the second blocking ribs are arranged in a staggered mode to form a bending flow channel. A plurality of first fender muscle and a plurality of second keep off the discharge route that the muscle can effectively increase steam, can block the velocity of motion that reduces steam to steam simultaneously, guarantee the noise reduction effect. Set up a plurality of first fender muscle and a plurality of second fender muscle in the exhaust region, simple structure, easily processing.

Furthermore, a baffle plate is arranged between the exhaust area and the second reflux groove, and the baffle plate extends along the height direction of the second box body to isolate the second reflux groove and the bending flow channel. Set up above-mentioned baffle and can avoid steam to enter into outside the direct exhaust box in the second backwash tank, the discharge route that can guarantee steam like this is longer, and then can reduce the velocity of motion of steam effectively, guarantees the noise reduction effect.

Furthermore, an overflow port is arranged in the exhaust area, the overflow port is arranged below the bent flow channel, and the overflow port forms an inlet of the exhaust channel; and/or the top of the first box body is provided with an exhaust port, the exhaust port forms an outlet of an exhaust passage, a spiral blocking rib is arranged on the inner surface of the top wall of the first box body, and the spiral blocking rib surrounds the periphery of the exhaust port. The flow passage opening is simple in structure and easy to process. Simultaneously, the overflow port is arranged below the bent flow channel, so that most steam can be discharged through the exhaust channel. The spiral blocking rib can further block steam, the movement speed of the steam is reduced, and the noise reduction effect is guaranteed.

According to another aspect of the present invention, a cooking appliance is provided, which comprises a pot body and a cover body covering the pot body, wherein the cover body is provided with an exhaust box, and the exhaust box is the exhaust box. The exhaust box can effectively solve the problem that the condensed water in the related art is easy to collect on the top of the exhaust box of the inner layer to affect the exhaust effect. Therefore, the cooking appliance with the exhaust box also has the advantages.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic cross-sectional view of a cover of an embodiment of a cooking appliance according to the utility model;

FIG. 2 shows a schematic view of a split construction of an embodiment of an exhaust box and a pressure limiting valve according to the present invention;

FIG. 3 shows a perspective view of the vent box and pressure limiting valve of FIG. 2;

FIG. 4 shows a top view of the vent box and pressure limiting valve of FIG. 2;

FIG. 5 shows a schematic cross-sectional view of the vent box and pressure limiting valve of FIG. 2;

FIG. 6 shows a cross-sectional schematic view of another angle of the vent box and pressure limiting valve of FIG. 2;

FIG. 7 shows a perspective view of a second cassette body of the vent cassette of FIG. 2;

FIG. 8 is a schematic perspective view of the second container of FIG. 7 at another angle;

FIG. 9 shows a schematic cross-sectional view of the second cartridge of FIG. 7;

FIG. 10 shows a perspective view of a first cassette body of the vent cassette of FIG. 2; and

fig. 11 is a perspective view illustrating another angle of the first container of fig. 10.

Wherein the figures include the following reference numerals:

10. a first case; 11. an exhaust port; 12. a spiral blocking rib; 20. a second box body; 21. a pressure limiting valve receiving cavity; 22. an exhaust region; 221. a baffle plate; 23. a first barrier rib; 24. a second rib; 25. a flow-through port; 30. an exhaust passage; 31. bending the flow channel; 41. a first backflow groove; 411. a first flow guide surface; 412. a second flow guide surface; 42. a second reflux tank; 421. a third flow guide surface; 422. a fourth flow guide surface; 423. a fifth flow guide surface; 50. a pressure limiting valve; 60. a cover body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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.

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 unless specifically stated otherwise. 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. 2 to 7, in the present embodiment, the exhaust box includes: a first case 10, a second case 20, an exhaust passage 30, and a first return flow groove 41. Wherein, the second box body 20 is arranged inside the first box body 10, and the inner side of the second box body 20 is provided with a pressure limiting valve accommodating cavity 21; the exhaust passage 30 is arranged between the first box body 10 and the second box body 20, the inlet of the exhaust passage 30 is communicated with the pressure limiting valve accommodating cavity 21, and the outlet of the exhaust passage 30 is communicated with the outside of the exhaust box; the first return flow groove 41 is provided on the top wall of the second container 20, and the first return flow groove 41 is provided to be inclined downward in a direction from the center to the edge of the second container 20.

With the technical solution of this embodiment, the exhaust box includes: a first case 10, a second case 20, an exhaust passage 30, and a first return flow groove 41. The first box body 10 and the second box body 20 are nested, the exhaust channel 30 is arranged between the first box body 10 and the second box body 20, the inlet of the exhaust channel 30 is communicated with the pressure limiting valve accommodating cavity 21, and the outlet of the exhaust channel 30 is communicated with the outside of the exhaust box. The steam discharged from the pressure limiting valve 50 is discharged to the outside of the cooking utensil along the exhaust passage 30, and the length of the exhaust passage 30 is long, so that the flow speed of the steam can be reduced, the steam can flow orderly and uniformly, and the airflow noise is further reduced. Meanwhile, the top wall of the second box body 20 is provided with a first backflow groove 41, the first backflow groove 41 is arranged in a downward inclined manner in the direction from the center to the edge of the second box body 20, the first backflow groove 41 can guide the condensed water generated at the top of the first box body 10 and the top of the second box body 20 to the edge of the second box body 20, and the condensed water is prevented from gathering at the top of the second box body 20 to affect the exhaust effect. Therefore, the technology of the embodiment can effectively solve the problem that the condensed water in the related art is easily accumulated on the top of the exhaust box of the inner layer to affect the exhaust effect.

It should be noted that, the downward inclination means that the groove bottom of the first backflow groove 41 is higher at the center position of the second container 20 and lower at the edge position of the second container 20.

Specifically, the pressure limiting valve 50 is arranged in the pressure limiting valve accommodating cavity 21, in the cooking process, high-temperature steam jacks a valve core plugged on an exhaust pipe of the pressure limiting valve 50, and the high-temperature steam enters the exhaust box and is exhausted out of the cooking appliance through the exhaust box.

As shown in fig. 7 and 8, the exhaust box further includes a second backflow groove 42 provided on an outer sidewall of the second case 20, and the second backflow groove 42 communicates with the first backflow groove 41. The condensed water guided to the edge of the second box 20 through the first backflow groove 41 can flow back to the cooking cavity along the second backflow groove 42, and the condensed water is prevented from being collected on the top of the second box 20 to affect the exhaust effect.

In the present embodiment, the condensed water can be refluxed to the inside of the cooking cavity by the first and second reflux grooves 41 and 42. Of course, in other possible embodiments, the condensed water may be introduced between the exhaust box and the cover 60 of the cooking appliance, and the user may periodically remove the introduced condensed water.

As shown in fig. 7 and 8, in the present embodiment, the first return grooves 41 extend in a radial direction of the second container 20, and the second return grooves 42 extend in a height direction of the side walls of the second container 20. This can make the return path of the condensed water the shortest, and this can make the processing of the exhaust box simpler at the same time. Of course, it should be noted that, due to manufacturing errors and the like, the extension of the first backflow groove 41 in the radial direction of the second box 20 means that the first backflow groove 41 extends in the direction from the center to the edge of the second box 20, and the first backflow groove 41 may have a certain included angle with the radial direction of the second box 20. The extension of the second backflow groove 42 along the height direction of the sidewall of the second container 20 is not limited to be parallel to the vertical axis of the second container 20, and the second backflow groove 42 may have an angle with the vertical axis of the second container 20.

As shown in fig. 7 and 8, in the present embodiment, the width of the first return flow groove 41 is gradually increased from the center to the edge of the second container 20. This results in a smoother collection of the condensed water, while the first return channel 41 is easier to process.

As shown in fig. 7 and 8, in the present embodiment, the groove wall of the first backflow groove 41 includes a first flow guiding surface 411 and a second flow guiding surface 412, and a lower edge of the first flow guiding surface 411 and a lower edge of the second flow guiding surface 412 intersect. The lower edge of the first guiding surface 411 and the lower edge of the second guiding surface 412 are intersected to form a V-shaped groove, and the V-shaped groove gradually decreases along the direction from the center of the second box body 20 to the edge, so that the collection of the condensed water is smoother, and the condensed water is not gathered in the first backflow groove 41.

As shown in fig. 7 and 8, in the present embodiment, the second backflow groove 42 includes a third flow guide surface 421 disposed obliquely, a fourth flow guide surface 422 disposed obliquely, and a fifth flow guide surface 423 disposed between the third flow guide surface 421 and the fourth flow guide surface 422. The third, fourth and fifth flow guide surfaces 421, 422 and 423 can effectively guide the condensed water so that the condensed water can flow downward.

As shown in fig. 7 and 8, in the present embodiment, the exhaust passage 30 includes a plurality of bent flow passages 31 disposed on the side wall of the second box body 20, each bent flow passage 31 is bent from bottom to top and extends, the number of the first backflow grooves 41 and the second backflow grooves 42 is plural, and the plurality of second backflow grooves 42 and the plurality of bent flow passages 31 are staggered along the circumferential direction of the second box body 20. The second backflow grooves 42 and the bent flow channels 31 are arranged in a staggered manner, so that the amount of condensed water collected by the plurality of first backflow grooves 41 and the plurality of second backflow grooves 42 is uniform. Meanwhile, the arrangement of the bent flow channel 31 can prolong the discharge path of steam, further reduce the movement speed of the steam and ensure the noise reduction effect.

In the present embodiment, the number of the first backflow grooves 41, the number of the second backflow grooves 42, and the number of the bending flow channels 31 are four, so that the condensed water can be collected more uniformly. Of course, in other possible embodiments. The number of the first backflow grooves, the second backflow grooves and the bending flow passages can also be three, six or other numbers.

As shown in fig. 7 and 8, in the present embodiment, an exhaust region 22 is provided between every two adjacent second backflow grooves 42, a plurality of first ribs 23 and a plurality of second ribs 24 are provided in the exhaust region 22, and the plurality of first ribs 23 and the plurality of second ribs 24 are arranged in a staggered manner to form the bent flow channel 31. A plurality of first muscle 23 and a plurality of second muscle 24 of keeping off can effectively increase the discharge route of steam, can block the velocity of motion that reduces steam to steam simultaneously, guarantee the noise reduction effect. The plurality of first blocking ribs 23 and the plurality of second blocking ribs 24 are arranged in the exhaust area 22, and the structure is simple and the processing is easy.

In the present embodiment, a baffle 221 is disposed between the exhaust region 22 and the second reflow groove 42, and the baffle 221 extends along the height direction of the second container 20 to isolate the second reflow groove 42 from the bent flow channel 31. The baffle 221 is arranged to prevent steam from entering the second reflux groove 42 and directly discharging the exhaust box, so that a longer discharge path of the steam can be ensured, the moving speed of the steam can be effectively reduced, and the noise reduction effect is ensured.

In this embodiment, the cover 60 of the cooking appliance is provided with corresponding backflow channels, so that the condensed water collected by the first backflow groove 41 and the second backflow groove 42 can be guided to the inside of the cooking cavity, most of the condensed water can flow back to the inside of the cooking cavity through the first backflow groove 41 and the second backflow groove 42, of course, a part of the steam can become condensed water without reaching the top of the second box body 20, and the condensed water generated by the part of the steam can flow back to the inside of the cooking cavity along the bent flow channel 31.

As shown in fig. 7 to 9, in the present embodiment, the overflow opening 25 is provided in the exhaust region 22, the overflow opening 25 is provided below the bent flow passage 31, and the overflow opening 25 forms an inlet of the exhaust passage 30. The steam enters the exhaust channel 30 through the flow-through opening 25, i.e. the flow-through opening 25 is an inlet of the exhaust channel 30. The overflow port 25 has a simple structure and is easy to process. Meanwhile, the through-flow opening 25 is arranged below the bent flow passage 31, so that most of steam can be discharged through the exhaust passage 30.

As shown in fig. 10 and 11, the top of the first container 10 is provided with an air outlet 11, the air outlet 11 forms an outlet of the air outlet channel 30, the inner surface of the top wall of the first container 10 is provided with a spiral blocking rib 12, and the spiral blocking rib 12 surrounds the periphery of the air outlet 11. The steam discharged along the exhaust passage 30 can be discharged to the outside of the cooking appliance through the exhaust port 11. The spiral blocking rib 12 can further block steam, reduce the moving speed of the steam and ensure the noise reduction effect.

In the present embodiment, high temperature steam generated in the cooking cavity during cooking food is exhausted through the exhaust pipe of the pressure limiting valve 50, flows through the valve core, and enters the flow passing port 25 of the second box 20, and the steam enters between the first box 10 and the second box 20; after colliding with the plurality of first barrier ribs 23 and the plurality of second barrier ribs 24 on the second box body 20, the steam discharge speed is reduced, and the steam discharge path is prolonged; the steam can be shunted through the first blocking rib 23 and the second blocking rib 24, a part of high-temperature steam continues to move upwards to enter between the tops of the first box body 10 and the second box body 20, and the other part of high-temperature steam is converted into condensed water to flow back to the inside of the cooking cavity. When the high-temperature steam moves to the position between the tops of the first box body 10 and the second box body 20 and collides with the spiral blocking rib 12, the steam discharging speed is reduced, meanwhile, the steam is divided, a part of the high-temperature steam is discharged out of the cooking utensil, and the other part of the high-temperature steam is converted into condensate water which is guided by the first backflow groove 41 and the second backflow groove 42 and flows back to the inside of the cooking cavity.

As shown in fig. 1, the present application further provides a cooking appliance, which includes a pot body and a cover body 60 covering the pot body, wherein an exhaust box is arranged on the cover body 60, and the exhaust box is the above exhaust box. The exhaust box can effectively solve the problem that the condensed water in the related art is easy to collect on the top of the exhaust box of the inner layer to affect the exhaust effect. Therefore, the cooking appliance with the exhaust box also has the advantages.

The lid body 60 further includes a handle assembly for opening and closing the lid of the cooking appliance.

In this embodiment, the cooking appliance is an electric pressure cooker. Of course, in the embodiment not shown in the figures, the cooking appliance can also be an electric cooker, a low-pressure rice cooker, a soybean milk maker, a food processor, a cooking machine, an electric stewpan, a multifunctional pot and the like.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, 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 simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered 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 … … surface," "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 the terms have no special meanings unless otherwise stated, 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 (11)

1. An exhaust box, comprising:

a first case (10);

the second box body (20) is arranged inside the first box body (10), and the inner side of the second box body (20) is provided with a pressure limiting valve accommodating cavity (21);

the exhaust channel (30) is arranged between the first box body (10) and the second box body (20), the inlet of the exhaust channel (30) is communicated with the pressure limiting valve accommodating cavity (21), and the outlet of the exhaust channel (30) is communicated with the outside of the exhaust box;

a first backflow groove (41) provided on a top wall of the second box body (20), the first backflow groove (41) being provided to be inclined downward in a direction from a center to an edge of the second box body (20).

2. The exhaust box according to claim 1, further comprising a second backflow groove (42) provided on an outer side wall of the second box body (20), the second backflow groove (42) communicating with the first backflow groove (41).

3. The venting box according to claim 2, wherein the first return groove (41) extends in a radial direction of the second box (20) and/or the second return groove (42) extends in a height direction of a side wall of the second box (20).

4. The exhaust box according to claim 2, wherein the width of the first return flow groove (41) is gradually increased from the center to the edge of the second box body (20).

5. The exhaust box according to claim 2, wherein the groove wall of the first flow-returning groove (41) comprises a first flow-guiding surface (411) and a second flow-guiding surface (412), the first flow-guiding surface (411) and the second flow-guiding surface (412) intersecting each other at a lower edge thereof.

6. The exhaust box according to claim 5, wherein the second backflow groove (42) includes a third flow guide surface (421) disposed obliquely, a fourth flow guide surface (422) disposed obliquely, and a fifth flow guide surface (423) disposed between the third flow guide surface (421) and the fourth flow guide surface (422).

7. The exhaust box according to any one of claims 2 to 6, wherein the exhaust channel (30) comprises a plurality of bent flow channels (31) arranged on a side wall of the second box body (20), each bent flow channel (31) is bent from bottom to top and extends, the number of the first backflow grooves (41) and the second backflow grooves (42) is multiple, and the plurality of the second backflow grooves (42) and the plurality of bent flow channels (31) are arranged in a staggered manner along the circumferential direction of the second box body (20).

8. The exhaust box according to claim 7, wherein an exhaust area (22) is arranged between every two adjacent second backflow grooves (42), a plurality of first blocking ribs (23) and a plurality of second blocking ribs (24) are arranged in the exhaust area (22), and the plurality of first blocking ribs (23) and the plurality of second blocking ribs (24) are arranged in a staggered manner to form the bent flow channel (31).

9. The exhaust box according to claim 8, wherein a baffle (221) is provided between the exhaust region (22) and the second return channel (42), and the baffle (221) extends in a height direction of the second box body (20) to isolate the second return channel (42) from the bent flow channel (31).

10. The exhaust box of claim 8,

an overflow port (25) is arranged in the exhaust area (22), the overflow port (25) is arranged below the bent flow passage (31), and the overflow port (25) forms an inlet of the exhaust channel (30); and/or

The top of first box body (10) is provided with gas vent (11), gas vent (11) form the export of exhaust passage (30), be provided with spiral fender muscle (12) on the internal surface of the roof of first box body (10), spiral fender muscle (12) enclose to be established the periphery of gas vent (11).

11. A cooking appliance comprising a pot body and a lid body (60) covering the pot body, the lid body (60) being provided with an exhaust box, characterized in that the exhaust box is the exhaust box of any one of claims 1 to 10.

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