CN217447376U - Bubble breaker and pressure cooker - Google Patents

Abstract

The embodiment of the application provides a bubble breaking device and pressure cooker belongs to culinary art technical field, and bubble breaking device includes bottom cover assembly and upper cover, and the bottom cover assembly is formed with the sprue and with the first exhaust hole of sprue intercommunication. The upper cover and the bottom cover assembly are enclosed to form a speed reduction flow channel communicated with the first exhaust hole, the speed reduction flow channel is at least partially annular so that air flows can impact each other to reduce the flow speed of the air flows, and the upper cover is provided with a second exhaust hole used for discharging the air flows after the air flows impact each other. Because the shape of deceleration runner is at least partly annular, the air current that gets into in the deceleration runner through first exhaust hole from the sprue strikes each other in the deceleration runner for the velocity of flow of air current reduces, and the second exhaust hole discharges the air current after mutually striking, because the velocity of flow of the air current after mutually striking reduces, thereby has reduced the noise that the air current of following the second exhaust hole exhaust formed, obtains better use and experiences.

Description

Bubble breaker and pressure cooker

Technical Field

The application relates to the technical field of cooking, in particular to a bubble breaker and a pressure cooker.

Background

In the related art, when the pressure cooker reaches the preset pressure, the pressure cooker exhausts outwards, so that large noise is generated in the exhaust process, and the use experience is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present application are directed to providing a bubble breaker and a pressure cooker to reduce noise during venting.

In order to achieve the above object, an aspect of the embodiments of the present application provides a bubble breaker, including:

the bottom cover assembly is provided with a main flow channel and a first exhaust hole communicated with the main flow channel; and

the upper cover, with the bottom cover assembly encloses and establishes into the deceleration runner of intercommunication first exhaust hole, the deceleration runner is at least partly the annular so that the air current reduces the air current velocity of flow that strikes each other, the upper cover is formed with the second exhaust hole, the second exhaust hole is used for discharging the air current after striking each other.

In one embodiment, the deceleration flow path includes:

the annular flow channel is communicated with the second exhaust hole, the axial projection of the annular flow channel is formed, and the projection area of the second exhaust hole is positioned in the projection area of the annular flow channel;

one end of the auxiliary flow channel is communicated with the first exhaust hole; and

the transition gas pocket is located assist the runner to deviate from the one end of first exhaust hole, transition gas pocket intercommunication assist the runner with annular runner, first exhaust hole with the arrangement direction of transition gas pocket with the axial cross arrangement of sprue.

In an embodiment, the first exhaust hole, the transition hole and the auxiliary flow passage are located inside the annular flow passage.

In one embodiment, the number of the auxiliary flow passages is multiple, each auxiliary flow passage is communicated with the corresponding first exhaust hole, the number of the transition air holes is one, and the multiple auxiliary flow passages are converged at the transition air holes.

In an embodiment, a direction of the first exhaust hole pointing to the transition air hole is a first direction, a direction crossing the first direction is a second direction, a span of the auxiliary flow channel along the second direction is a reference distance, and the reference distance increases along the first direction in at least a partial region of the auxiliary flow channel.

In one embodiment, the bottom cap assembly comprises:

the bottom cover assembly is provided with a mounting cavity, the main flow channel is formed on the bottom cover assembly, and the mounting cavity is positioned above the main flow channel; and

the flow guide assembly is partially positioned in the installation cavity, the first exhaust hole is formed in the flow guide assembly, and the flow guide assembly, the upper cover and the bottom cover assembly are enclosed into the speed reduction flow channel.

In one embodiment, the speed reduction flow passage comprises an annular flow passage, an auxiliary flow passage and a transition air hole, the annular flow passage is communicated with the second exhaust hole and projects along the axial direction of the annular flow passage, the projection area of the second exhaust hole is positioned in the projection area of the annular flow passage, one end of the auxiliary flow passage is communicated with the first exhaust hole, the transition air hole is positioned at one end of the auxiliary flow passage, which is far away from the first exhaust hole, the transition air hole is communicated with the auxiliary flow passage and the annular flow passage, the arrangement directions of the first exhaust holes and the transition air holes are crossed with the axial direction of the main flow passage, the flow guide assembly and the upper cover are arranged in a surrounding mode to form the auxiliary flow channel and the transition air holes, the flow guide assembly, the upper cover and the bottom cover assembly are arranged in a surrounding mode to form the annular flow channel, and the annular flow channel surrounds the flow guide assembly.

In one embodiment, the flow guide assembly is provided with a first matching surface and a second matching surface which are arranged at intervals, and the transition air hole is at least partially positioned between the first matching surface and the second matching surface along the circumferential direction of the flow guide assembly;

the bottom cover assembly includes:

the bottom cover body is provided with a main flow channel; and

the limiting rib is positioned at one end, away from the main flow channel, of the bottom cover body, the limiting rib and the bottom cover body are enclosed into the installation cavity, the limiting rib, the bottom cover body, the flow guide assembly and the upper cover are enclosed into the annular flow channel, and the limiting rib is positioned between the installation cavity and the annular flow channel along the radial direction of the bottom cover body;

wherein, the one end of spacing muscle is located first fitting surface is followed diversion assembly's circumference deviates from one side of transition gas pocket, the other end of spacing muscle is located the second fitting surface is followed diversion assembly's circumference deviates from one side of transition gas pocket, with the restriction diversion assembly rotates.

In one embodiment, the shape of the first mating surface is different from the shape of the second mating surface, and/or the size of the first mating surface is different from the size of the second mating surface; the one end of spacing muscle is formed with first spacing face, the other end of spacing muscle is formed with the spacing face of second, first spacing face with first fitting surface looks adaptation and the spacing face of second with second fitting surface looks adaptation is in order to prevent the reverse dress of diversion assembly.

In one embodiment, the flow directing assembly comprises:

the flow guide disc is positioned in the mounting cavity, and the first exhaust hole is formed in the flow guide disc; and

the flow guide ribs are positioned between the flow guide disc and the upper cover, and the flow guide ribs, the flow guide disc, the upper cover and the bottom cover assembly are enclosed into the speed reduction flow channel.

In one embodiment, the speed reduction flow channel includes an annular flow channel, an auxiliary flow channel and a transition air hole, the annular flow channel is communicated with the second exhaust hole and projects along the axial direction of the annular flow channel, the projection area of the second exhaust hole is located in the projection area of the annular flow channel, one end of the auxiliary flow channel is communicated with the first exhaust hole, the transition air hole is located at one end of the auxiliary flow channel, which is far away from the first exhaust hole, the transition air hole is communicated with the auxiliary flow channel and the annular flow channel, and the arrangement direction of the first exhaust hole and the transition air hole is crossed with the axial direction of the main flow channel;

the water conservancy diversion muscle includes:

the diversion main ribs, the diversion disc, the bottom cover assembly and the upper cover are encircled to form the annular channel, and the diversion main ribs, the diversion disc and the upper cover are encircled to form the transition air holes; and

the muscle is assisted in the water conservancy diversion, is located partially at least the water conservancy diversion owner muscle is followed radially deviating from of bottom subassembly one side of annular channel, the water conservancy diversion is assisted the muscle the guiding disc the water conservancy diversion owner muscle and the upper cover encloses to establish into a plurality ofly assist the runner, the quantity of first exhaust hole is a plurality of, assist the runner with correspond first exhaust hole intercommunication.

In one embodiment, the auxiliary diversion rib is located on one side of the main diversion rib, which is away from the annular channel in the radial direction of the bottom cover assembly, the number of the transition air holes is one, and the auxiliary flow passages are converged at the transition air holes.

In an embodiment, at least two of the auxiliary flow channels are first auxiliary flow channels, at least one of the auxiliary flow channels is a second auxiliary flow channel, a direction of the first exhaust hole pointing to the transition air hole is a first direction, and a direction intersecting the first direction is a second direction;

the flow guide main rib comprises a first boundary rib and a first throttling rib, the first boundary rib, the flow guide disc, the bottom cover assembly and the upper cover are arranged in an annular flow channel outside the first boundary rib in a surrounding mode, the first throttling rib is connected to one side, deviating from the annular flow channel, of the first boundary rib, the flow guide disc and the upper cover are arranged in a surrounding mode to form the transition air hole, and the first exhaust hole and the auxiliary flow channel are located on the inner side of the first boundary rib;

the number of the flow guide auxiliary ribs is two, each flow guide auxiliary rib comprises a second boundary rib and a second throttling rib, the second throttling rib is connected to one side, away from the other second boundary rib, of the corresponding second boundary rib, the first throttling rib, each second boundary rib and the corresponding second throttling rib are arranged in a surrounding mode to correspond to the first auxiliary flow channel, the first auxiliary flow channel comprises a throttling area and a speed reducing area which is adjacent to the corresponding throttling area and located at the downstream of the corresponding throttling area, the size of the throttling area in the second direction is smaller than that of the speed reducing area in the second direction, the first throttling ribs and the second throttling ribs are in one-to-one correspondence, the throttling area is formed by surrounding the first throttling ribs and the corresponding second throttling ribs, and the speed reducing area is formed by surrounding the first boundary ribs, the second boundary ribs, the first throttling ribs and the corresponding second throttling ribs, one of them second boundary muscle deviates from and corresponds one side of second throttle muscle, another the second boundary muscle deviates from and corresponds one side of second throttle muscle and first boundary muscle encloses and establishes into to be located two between the first auxiliary runner the runner is assisted to the second, two distance between the second boundary muscle is followed first direction reduces gradually and increases gradually again.

A second aspect of the present application provides a pressure cooker, comprising:

a pan body;

the exhaust valve core is arranged on the pot body;

an exhaust valve cover mounted on the exhaust valve core to open or close the exhaust valve core; and

the bubble breaker of any one of the above is installed on the pot body, and the exhaust valve core and the exhaust valve cover are both at least partially located in the main flow passage.

The bubble breaker of this application embodiment, because the shape of deceleration runner is the annular at least partially, from the air current that the sprue got into in the deceleration runner through first exhaust hole impact each other in the deceleration runner for the velocity of flow of air current reduces, the air current after the second exhaust hole will impact each other is discharged, because the velocity of flow of the air current after impacting each other reduces, thereby the noise that the air current of having reduced from the second exhaust hole exhaust formed obtains better use and experiences.

Drawings

FIG. 1 is a schematic view of a lid portion of a pressure cooker according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a bubble breaker according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of a bubble breaker according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a bottom cap assembly according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a flow guide assembly according to an embodiment of the present disclosure;

FIG. 6 is an assembly view of the bottom cover assembly and the diversion assembly according to the embodiment of the present application;

FIG. 7 is an enlarged view at position B in FIG. 6;

FIG. 8 is an enlarged view of FIG. 6 at position C;

FIG. 9 is a cross-sectional view taken at location A-A of FIG. 6;

fig. 10 is a graph showing a noise pattern during the exhaust process of the prototype, i.e., the pressure cooker without the bubble breaker of the present application, in solid lines, and the noise pattern during the exhaust process of the pressure cooker with the improved bubble breaker of the present application, in broken lines, according to an embodiment of the present application.

Description of reference numerals: a bottom cover assembly 1; a main flow passage 11; a first exhaust hole 12; a bottom lid assembly 13; a mounting cavity 131; a bottom cover body 132; a limiting rib 133; a first stop surface 1331; a second stop surface 1332; a card slot 134; a disassembly and assembly port 135; a stopper 136; a flow directing assembly 14; a first mating face 141; a second mating face 142; a deflector 143; a flow guiding rib 144; a flow guiding main rib 1441; the first boundary rib 14411; a first throttle bead 14412; flow guide auxiliary ribs 1442; the second boundary rib 14421; the second restriction rib 14422; a limiting boss 145; an upper cover 2; a second exhaust hole 21; a deceleration flow passage 3; an annular flow passage 31; the first auxiliary flow passage 321; throttle zone 3211; a deceleration zone 3212; a second auxiliary runner 322; a transition vent 33; a pan body 100; an exhaust valve spool 200; an exhaust valve cover 300; the bubble breaker 400.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the embodiments of the present application, "upper", "lower", "top", "bottom", orientation or positional relationship is based on the orientation or positional relationship shown in fig. 9, it being understood that these orientation terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application. With reference to fig. 9, the direction indicated by the arrow R3 is the up-down direction.

Before describing the embodiments of the present application, it is necessary to analyze the reason why the noise is large in the exhaust process in the related art, and obtain the technical solution of the embodiments of the present application through reasonable analysis.

In the related art, since the pressure in the pressure cooker is high, the diameter of the exhaust valve core 200 is small, so that the flow rate of the exhaust gas flow is high. Research shows that the calculation formula of the loud power of the exhaust noise is as follows:

in the formula: w is the loud power of exhaust noise, K is a constant in a certain state, D is the diameter of a nozzle, rho _α As jet density, ρ ₀ C is the speed of sound and v is the ejection velocity of the exiting gas stream for the surrounding medium density.

According to the formula, the loud power of the exhaust noise is strongly related to the higher order of the injection speed of the discharged airflow, namely, the noise is larger as the injection speed of the discharged airflow is higher, so that the noise formed by the discharged airflow can be reduced by reducing the injection speed of the discharged airflow, and better use experience is obtained.

In view of the above, the present embodiment provides a pressure cooker, referring to fig. 1, the pressure cooker includes a cooker body 100, an exhaust valve core 200, an exhaust valve cover 300 and a bubble breaker 400. The vent valve core 200 is installed at the pot body 100, and the vent valve cover 300 is installed at the vent valve core 200 to open or close the vent valve core 200. The bubble breaker 400 is installed at the pot body 100. When the pressure in the cooker body 100 reaches a preset pressure, the exhaust valve cover 300 opens the exhaust valve core 200, and the pressure in the cooker body 100 is discharged from the exhaust valve core 200 to the bubble breaker 400 and is discharged outside through the bubble breaker 400.

In one embodiment, the pressure cooker may be an electric pressure cooker.

Referring to fig. 2 to 6, the bubble breaker 400 of the embodiment of the present application includes a bottom cover assembly 1 and an upper cover 2. The bottom cover assembly 1 is formed with a main flow passage 11 and a first exhaust hole 12 communicating with the main flow passage 11. The upper cover 2 and the bottom cover assembly 1 enclose a speed reduction flow channel 3 communicated with the first air exhaust hole 12, the speed reduction flow channel 3 is at least partially annular so that air flows impact each other to reduce the flow speed of the air flows, and the upper cover 2 is provided with a second air exhaust hole 21, and the second air exhaust hole 21 is used for exhausting the air flows after the air flows impact each other. According to the structure, the shape of the speed reduction flow channel 3 is at least partially annular, airflow entering the speed reduction flow channel 3 from the main flow channel 11 through the first exhaust holes 12 impacts each other in the speed reduction flow channel 3, the flow rate of the airflow is reduced, the airflow impacting each other is discharged from the second exhaust holes 21, and due to the fact that the flow rate of the airflow impacting each other is reduced, noise formed by the airflow discharged from the second exhaust holes 21 is reduced, and better use experience is obtained.

In one embodiment, both the vent valve cartridge 200 and the vent valve cap 300 are at least partially positioned within the primary flow passage 11. In this way, when the preset pressure is reached, the exhaust valve cover 300 opens the exhaust valve core 200 to allow the air flow discharged from the exhaust valve core 200 to enter the main flow passage 11 of the bubble breaker 400.

In one embodiment, referring to fig. 3 to 6, the deceleration flow path 3 includes an annular flow path 31, an auxiliary flow path and a transition air hole 33. The annular flow passage 31 is communicated with the second exhaust holes 21, and the projection area of the second exhaust holes 21 is positioned in the projection area of the annular flow passage 31 along the axial projection of the annular flow passage 31. One end of the auxiliary flow passage communicates with the first exhaust hole 12. The transition air hole 33 is located at one end of the auxiliary flow passage, which is far away from the first exhaust hole 12, the transition air hole 33 is communicated with the auxiliary flow passage and the annular flow passage 31, and the arrangement directions of the first exhaust hole 12 and the transition air hole 33 are arranged in a way of being crossed with the axial direction of the main flow passage 11. In such a structure, because the arrangement directions of the first exhaust holes 12 and the transition air holes 33 are arranged in a crossed manner with the axial direction of the main flow channel 11, when the air flow enters the auxiliary flow channel from the main flow channel 11 through the first exhaust holes 12 and flows to the transition air holes 33, the change of the air flow channel is beneficial to reducing the flow speed of the air flow, the air flow enters the auxiliary flow channel from the main flow channel 11 through the first exhaust holes 12 and flows to the annular flow channel 31 through the transition air holes 33 and then is discharged from the second exhaust holes 21, the path length of the air flow is longer, and the reduction of the flow speed of the air flow is beneficial. The air current after the velocity of flow reduces gets into the annular channel and is influenced and strike each other by annular flow channel 31 in, form two opposite directions's air current, make the air current velocity of flow further reduce, part air current is discharged from second exhaust hole 21 in two opposite directions's air current, part air current converges after flowing along opposite direction in annular flow channel 31, two air currents converge and make the air current strike each other once more, further reduce the velocity of flow, the air current after the velocity of flow reduces is discharged from second exhaust hole 21, thereby the noise that the air current that has reduced from second exhaust hole 21 discharge formed has been reduced. The projection area of the second exhaust hole 21 is located in the projection area of the annular flow passage 31, so that the second exhaust hole 21 and the base assembly 1 are prevented from interfering to influence exhaust.

It should be understood that the projection area of the second exhaust hole 21 is located in the projection area of the annular flow channel 31, which means that the projection area of the second exhaust hole 21 is located in an area surrounded by a contour line outside the projection of the annular flow channel 31, and the projection area of the second exhaust hole 21 overlaps with the projection area of the annular flow channel 31. The projection area of the second exhaust hole 21 is located in the projection area of the annular flow passage 31, and does not mean that the projection area of the second exhaust hole 21 is located inside the projection area of the annular flow passage 31, that is, the projection area of the second exhaust hole 21 is not located on one side of the projection area of the annular flow passage 31 radially directed to the center of the annular flow passage 31.

Referring to fig. 6, for example, the air flow enters the auxiliary flow channel from the main flow channel 11 through the first exhaust hole 12 on the left side shown in fig. 6, enters the annular flow channel 31 along the auxiliary flow channel through the transition air hole 33 on the right side shown in fig. 6, the air flow entering the annular flow channel 31 is influenced by the annular flow channel 31 on the right side shown in fig. 6 to impact each other to reduce the flow velocity of the air flow, two air flows with opposite flow directions are formed, the partial air flows in the two air flows with opposite flow directions are discharged from the second exhaust hole 21, the partial air flows in the two air flows with opposite flow directions are merged at the position on the right side shown in fig. 6 in the annular flow channel 31, the merged air flows impact each other to further reduce the flow velocity, and the merged air flow can be discharged from the second exhaust hole 21. For example, referring to fig. 9, in fig. 9, the axial direction of the main flow passage 11 is arranged along the up-down direction, the arrangement direction of the first exhaust holes 12 and the transition air holes 33 is arranged along the left-right direction, and the arrangement direction of the first exhaust holes 12 and the transition air holes 33 and the axial direction of the main flow passage 11 are crosswise arranged.

In one embodiment, referring to fig. 9, the arrangement direction of the first exhaust holes 12 and the transition holes 33 is perpendicular to the axial direction of the main channel 11.

In an embodiment, the auxiliary flow passage and the transition air hole 33 may not be provided, the air flow of the main flow passage 11 directly enters the annular flow passage 31 through the first exhaust hole 12, the air flows entering the annular flow passage 31 through the first exhaust hole 12 impact each other to form two opposite air flows, so that the flow velocity of the air flows is reduced, part of the two opposite air flows is discharged from the second exhaust hole 21, part of the air flows flow flows to a merging position in the annular flow passage 31 in opposite directions, the merged air flows impact each other, so that the flow velocity of the air flows is further reduced, and the air flow with the reduced flow velocity is discharged from the second exhaust hole 21, thereby reducing noise formed by the air flows discharged from the second exhaust hole 21.

In one embodiment, referring to fig. 6 and 9, the first exhaust holes 12, the transition holes 33, and the auxiliary flow channels are located inside the annular flow channel 31. With such a structure, the space inside the annular flow passage 31 can be fully utilized, which is beneficial to the miniaturization of the bubble breaker 400 and the space occupied by the bubble breaker 400.

It should be noted that the inner side of the annular flow passage 31 refers to a side of the annular flow passage 31 facing away from the center of the annular flow passage 31 in the radial direction, and the outer side of the annular flow passage 31 refers to a side of the annular flow passage 31 facing toward the center of the annular flow passage 31 in the radial direction.

In one embodiment, the first exhaust holes 12, the transition holes 33, and the auxiliary flow passages may be located outside the annular flow passage 31.

In one embodiment, referring to fig. 3 to 6, the number of the auxiliary flow channels is multiple, each of the auxiliary flow channels is communicated with the corresponding first exhaust hole 12, the number of the transition air holes 33 is one, and the multiple auxiliary flow channels are merged at the transition air holes 33. In such a structure, the airflow of the main flow passage 11 is divided by the plurality of auxiliary flow passages, and the plurality of auxiliary flow passages are converged at the transition air holes 33, so that the airflow of each auxiliary flow passage is converged and impacted at the transition air holes 33, and the flow velocity of the airflow is favorably reduced.

In one embodiment, the transition air holes 33 may also be separated, each of the secondary flow passages enters the annular flow passage 31 through the separated transition air holes 33, and the air flows of the secondary flow passages may not be merged at the transition air holes 33.

In one embodiment, referring to fig. 6, a direction of the first exhaust hole 12 pointing to the transition air hole 33 is a first direction, a direction crossing the first direction is a second direction, a span of the auxiliary flow channel along the second direction is a reference distance, and the reference distance increases along the first direction in at least a portion of the area of the auxiliary flow channel. According to the structure, the airflow can flow from the position with the narrower reference distance to the position with the wider reference distance along the first direction, so that the flow speed of the airflow is reduced, and the pressure of the airflow is reduced.

In one embodiment, referring to fig. 6, the first direction is indicated by an arrow R1 in the figure, and the second direction is indicated by an arrow R2 in the figure.

In one embodiment, the first direction is perpendicular to the second direction.

In one embodiment, the reference distance is gradually increased along the first direction.

It will be appreciated that when the reference distance is progressively increased along the first direction, with the position in the first direction being the abscissa and the reference distance being the ordinate, the reference distance is a continuous function of the position with respect to the first direction.

In one embodiment, the reference distance increases abruptly in the first direction.

It will be appreciated that when the reference distance increases abruptly in the first direction, with the position in the first direction being the abscissa and the reference distance being the ordinate, the reference distance is discontinuous as a function of position in respect of the first direction, and there is a discontinuity point position. Illustratively, the reference distance is abruptly changed from 2mm to 3mm at the discontinuity position.

In one embodiment, referring to fig. 3 and 4, the bottom cover assembly 1 is engaged with the top cover 2.

In an embodiment, referring to fig. 3 and 4, the bottom cover assembly 1 is formed with a locking groove 134, a mounting/dismounting opening 135 and a stopper 136, the stopper 136 is located on a side of the mounting/dismounting opening 135 facing the locking groove 134, the upper cover 2 is formed with a locking portion, the locking portion enters the locking groove 134 through the mounting/dismounting opening 135 by rotating, and the stopper 136 prevents the locking portion from moving out of the locking groove 134, so that the upper cover 2 is locked with the bottom cover assembly 1.

In one embodiment, referring to fig. 3, the bottom cover assembly 1 includes a bottom cover member 13 and a flow guiding member 14, the bottom cover member 13 is formed with a mounting cavity 131, the main flow channel 11 is formed on the bottom cover member 13, and the mounting cavity 131 is located above the main flow channel 11. The flow guide assembly 14 is partially located in the mounting cavity 131, the first exhaust hole 12 is formed in the flow guide assembly 14, and the flow guide assembly 14, the upper cover 2 and the bottom cover assembly 13 enclose the deceleration flow channel 3. According to the structure, the speed reduction flow channels 3 are partially distributed to the bottom cover component 13 and the flow guide component 14, when one of the bottom cover component 13 and the flow guide component 14 is damaged, only the damaged one of the bottom cover component 13 and the flow guide component 14 needs to be replaced, the whole bottom cover assembly 1 does not need to be replaced, and maintenance cost is reduced. In the installation process, the flow guide assembly 14 is not installed on the bottom cover assembly 13, the bottom cover assembly 13 is installed on a part needing to discharge gas with certain pressure, the main flow passage 11 is formed in the bottom cover assembly 13 to receive the gas flow with higher pressure and higher flow speed, and the flow guide assembly 14 is not installed on the bottom cover assembly 13, so that the position relation between the bottom cover assembly 13 and the corresponding part can be observed clearly through the main flow passage 11, and the installation of the bottom cover assembly 13 is facilitated.

It will be appreciated that the greatest noise tends to come from the vicinity of the covers of the vent valve spool 200 and the vent valve 300, the vent valve spool 200 and the vent valve cover 300 are both partially located in the primary flow passage 11, and the noise in the vicinity of the vent valve spool 200 and the vent valve 300 is isolated to some extent by the flow guide assembly 14 and the upper cover 2, which is beneficial for noise reduction.

In one embodiment, the bottom lid assembly 13 is mounted to the pan body 100.

In one embodiment, the bottom cover assembly 13 is sealingly coupled to the main body 100 to seal the main flow passage 11.

In one embodiment, referring to fig. 3 and 4, the locking slot 134, the removal opening 135 and the stop 136 are formed in the bottom cover assembly 13.

In one embodiment, the baffle assembly 14 and the bottom cap assembly 13 may be integrally formed.

In one embodiment, the upper cover 2 and the bottom cover assembly 1 may be integrally formed.

In one embodiment, referring to fig. 3-6 and fig. 9, the flow guide assembly 14 and the top cover 2 are enclosed to form a secondary flow passage and a transition air hole 33, the flow guide assembly 14, the top cover 2 and the bottom cover assembly 13 are enclosed to form an annular flow passage 31, and the annular flow passage 31 surrounds the flow guide assembly 14. With the structure, the flow guide assembly 14 is fully favorable for the space arrangement on the inner side of the annular flow passage 31, so that the bubble breaker 400 is compact in structure, small in occupied space and favorable for the miniaturization of the bubble breaker 400. The flow guide assembly 14 is enclosed as a part of the annular flow passage 31 and a part of the auxiliary flow passage, so that no additional parts are needed to be respectively enclosed as the annular flow passage 31 and the auxiliary flow passage, and the structure of the bubble breaker 400 is simplified.

In one embodiment, referring to fig. 7 and 8, the flow guide assembly 14 is formed with a first mating surface 141 and a second mating surface 142 that are spaced apart from each other, and the transition air hole 33 is at least partially located between the first mating surface 141 and the second mating surface 142 along the circumferential direction of the flow guide assembly 14.

In one embodiment, referring to fig. 4 to 8, the bottom cover assembly 13 includes a bottom cover body 132 and a limiting rib 133. The main flow passage 11 is formed in the bottom cover body 132. Spacing muscle 133 is located the one end that bottom body 132 deviates from the sprue 11, and spacing muscle 133 encloses with bottom body 132 and establishes into installation cavity 131, and spacing muscle 133, bottom body 132, water conservancy diversion subassembly 14 and upper cover 2 enclose and establish into annular runner 31, and spacing muscle 133 is located between installation cavity 131 and the annular runner 31 along the radial of bottom body 132. One end of the limiting rib 133 is located on one side of the first matching surface 141 deviating from the transition air hole 33 along the circumferential direction of the flow guide assembly 14, and the other end of the limiting rib 133 is located on one side of the second matching surface 142 deviating from the transition air hole 33 along the circumferential direction of the flow guide assembly 14, so as to limit the rotation of the flow guide assembly 14. In this structure, the limiting rib 133 and the bottom cover body 132 are enclosed to form the installation cavity 131, and the limiting rib 133 is located between the installation cavity 131 and the annular flow channel 31, and the limiting rib 133 is used for enclosing to form the annular flow channel 31 and also enables the installation cavity 131 to have a sufficient height to accommodate the diversion assembly 14, which is beneficial to preventing the diversion assembly 14 from being separated from the accommodation cavity. The position relation between the limiting rib 133 and the first matching surface 141 and the position relation between the limiting rib 133 and the second matching surface 142 make the rotation of the flow guide assembly 14 limited, and also make the flow guide assembly 14 participate in the limitation of the enclosed transition air hole 33 at a proper position, so that the limiting rib 133 does not block the transition air hole 33, and the air flow in the auxiliary flow channel can better flow into the annular flow channel 31 through the transition air hole 33 and can not be blocked by the blocking of the limiting rib 133 basically.

In one embodiment, referring to fig. 3 and 4, the locking slot 134, the mounting/dismounting opening 135 and the stopper 136 are formed on the bottom cap body 132.

In one embodiment, the bottom cover body 132 and the limiting rib 133 may be integrally formed.

In one embodiment, the bottom lid body 132 is mounted to the pan body 100.

In one embodiment, referring to fig. 6 to 8, the shape of the first mating surface 141 is different from the shape of the second mating surface 142, and/or the size of the first mating surface 141 is different from the size of the second mating surface 142. One end of the limiting rib 133 is formed with a first limiting surface 1331, the other end of the limiting rib 133 is formed with a second limiting surface 1332, the first limiting surface 1331 is adapted to the first matching surface 141, and the second limiting surface 1332 is adapted to the second matching surface 142 to prevent the reverse installation of the diversion assembly 14. With such a structure, when the flow guiding assembly 14 is installed normally, that is, the flow guiding assembly 14 is in an assembly state under normal operation, the first limiting surface 1331 is adapted to the first fitting surface 141, the second limiting surface 1332 is adapted to the second fitting surface 142, and the flow guiding assembly 14 located in the installation cavity 131 and the upper cover 2 can form an auxiliary flow channel. When the flow guiding assembly 14 is reversely installed, one side of the flow guiding assembly 14, which should be enclosed as the auxiliary flow channel, faces the main flow channel 11, and the flow guiding assembly 14 cannot be enclosed as the auxiliary flow channel with the upper cover 2. However, since the shape of the first mating face 141 is different from the shape of the second mating face 142, and/or the size of the first mating face 141 is different from the size of the second mating face 142; when the diversion assembly 14 is reversely installed, the first limiting surface 1331 of the limiting rib 133 cannot be matched with the second matching surface 142, and the second limiting surface 1332 of the limiting rib 133 cannot be matched with the first matching surface 141, so that the diversion assembly 14 can hardly be assembled in the installation cavity 131 defined by the limiting rib 133 and the bottom cover body 132 under the condition of reverse installation, and the purpose of preventing the diversion assembly 14 from being reversely installed is achieved.

In an embodiment, referring to fig. 7 and 8, the first engagement surface 141 is a plane, and the second engagement surface 142 is a bent surface.

In an embodiment, the first mating surface 141 and the second mating surface 142 are bending surfaces, but the number of the first bending surface bends is different from the number of the second bending surface bends.

In an embodiment, the limiting rib 133 may not be provided, the mounting cavity 131 is formed in the bottom cover body 132, and the airflow guiding assembly 14 may rotate in the mounting cavity 131.

In one embodiment, referring to fig. 5, the guiding assembly 14 includes a guiding plate 143 and a guiding rib 144. The baffle 143 is positioned in the mounting cavity 131, and the first exhaust holes 12 are formed in the baffle 143. The diversion ribs 144 are positioned between the diversion disc 143 and the upper cover 2, and the diversion ribs 144, the diversion disc 143, the upper cover 2 and the bottom cover assembly 13 enclose the speed reduction flow channel 3. According to the structure, most of the main flow passage 11 and the deceleration flow passage 3 are separated by the flow guiding disc 143, the deceleration flow passage 3 is communicated with the main flow passage 11 through the first exhaust hole 12, the flow guiding disc 143 is used for enclosing the deceleration flow passage 3, and the flow of the air flow is guided by the flow guiding ribs 144 to reduce the flow speed of the air flow in the deceleration flow passage 3.

It will be appreciated that the flow of air in the secondary flow path between the ribs 144 can increase the length of the path through which the air flows before exiting the second exhaust vent 21 to some extent.

In one embodiment, the deflector 143 is integrally formed with the deflector rib 144.

In one embodiment, the ribs 144 are integrally formed with the cover 2.

In one embodiment, the deflector 143 may be integrally formed with the base assembly.

In one embodiment, the main flow passage 11 may be formed in the baffle 143.

In one embodiment, referring to fig. 5 and 6, the air guiding ribs 144 include an air guiding main rib 1441 and an air guiding auxiliary rib 1442. The main diversion rib 1441, the diversion disc 143, the bottom cover assembly 13 and the upper cover 2 enclose an annular channel, and the main diversion rib 1441, the diversion disc 143 and the upper cover 2 enclose the transition air hole 33. The water conservancy diversion is assisted the muscle 1442 and is located the water conservancy diversion main muscle 1441 at least partially and deviates from one side of annular channel along the radial of bottom cap subassembly 13, and water conservancy diversion is assisted muscle 1442, guiding disc 143, water conservancy diversion main muscle 1441 and is enclosed to establish into a plurality of assistance runners with main upper cover 2, and the quantity of first exhaust hole 12 is a plurality of, assists the runner with correspond first exhaust hole 12 intercommunication. In such a structure, the main diversion rib 1441 is divided into a plurality of auxiliary flow passages along the radial space on one side departing from the annular channel of the bottom cover assembly 13 by the auxiliary diversion rib 1442, so that the airflow of the main flow passage 11 is separated into a plurality of airflows to enter the corresponding auxiliary flow passages respectively, and the airflows in the auxiliary flow passages impact each other after being separated from the corresponding auxiliary flow passages, so that the airflow flow rate is reduced, and the exhaust noise is reduced.

In one embodiment, referring to fig. 5 and 6, the flow guiding auxiliary rib 1442 is located on a side of the flow guiding main rib 1441 facing away from the annular channel along a radial direction of the bottom cover assembly 13, the number of the transition air holes 33 is one, and a plurality of auxiliary flow passages are merged at the transition air holes 33. In such a structure, the air flows in the auxiliary channels flow out of the corresponding auxiliary channels and then converge at the transition air holes 33, so that the air flows flowing out of the auxiliary channels impact each other, and the flow rate of the air flows is reduced.

In one embodiment, the auxiliary flow guiding ribs 1442 may be disposed through the transition air holes 33 such that the air flow of each auxiliary flow passage is separated by the auxiliary flow guiding ribs 1442 at the transition air holes 33.

In one embodiment, referring to fig. 5 and 6, at least two of the auxiliary flow channels are first auxiliary flow channels 321, and at least one of the auxiliary flow channels is a second auxiliary flow channel 322.

In one embodiment, referring to fig. 5 and 6, the main diversion rib 1441 includes a first boundary rib 14411 and a first flow restriction rib 14412, the first boundary rib 14411, the diversion plate 143, the bottom cover assembly 13, and the upper cover 2 enclose an annular flow passage 31 located outside the first boundary rib 14411, the first flow restriction rib 14412 is connected to a side of the first boundary rib 14411 facing away from the annular passage, the first boundary rib 14411, the diversion plate 143, and the upper cover 2 enclose a transition air hole 33, and the first exhaust hole 12 and the auxiliary flow passage are located inside the first boundary rib 14411.

In one embodiment, referring to fig. 5 and fig. 6, the number of the flow guiding auxiliary ribs 1442 is two, the first flow guiding auxiliary rib 1442 includes a second boundary rib 14421 and a second throttling rib 14422, the second throttling rib 14422 is connected to a side of the corresponding second boundary rib 14421 away from the other second boundary rib 14421, the first boundary rib 14411, the first throttling rib 14412, the second boundary rib 14421 and the corresponding second throttling rib 14422 are enclosed to correspond to the first auxiliary flow passage 321, the first auxiliary flow passage 321 includes a throttling area 3211 and a speed reducing area 3212 adjacent to the corresponding throttling area 3211 and located downstream of the corresponding throttling area 3211, the size of the throttling area 3211 in the second direction is smaller than the size of the speed reducing area 3212 in the second direction, the first throttling ribs 14412 and the second throttling ribs 14422 are in one-to-one correspondence, the enclosure between the first throttling rib 56327 and the corresponding second throttling rib 14422 is defined to be the throttling area 3211, the first boundary rib 14411, the second boundary rib 14421, the corresponding first throttling area 14421 and the corresponding second throttling area 32168 and the corresponding second throttling area 14422, one of the second boundary ribs 14421 is away from the side corresponding to the second throttling rib 14422, the other second boundary rib 14421 is away from the side corresponding to the second throttling rib 14422, and the first boundary rib 14411 is enclosed into the second auxiliary flow passage 322 between the two first auxiliary flow passages 321. The distance between the two second boundary ribs 14421 gradually decreases and gradually increases along the first direction. With such a structure, the airflow in the first auxiliary flow passage 321 flows alternately between the throttle region 3211 and the deceleration region 3212, and the distance between the throttle region 3211 and the deceleration region 3212 along the second direction vary greatly, so that the airflow in the first auxiliary flow passage 321 can be decelerated well. The throttling rib is not arranged in the second auxiliary flow passage 322 any longer, and the air flow in the second auxiliary flow passage 322 can move from the region with the smaller distance between the two second boundary ribs 14421 to the region with the larger distance between the two second boundary ribs 14421 by changing the distance between the two second boundary ribs 14421, so that the flow velocity of the air flow is reduced. The second auxiliary flow passage 322 reduces the air flow speed through the two second boundary ribs 14421, the second auxiliary flow passage 322 can be provided with less or no corresponding throttling ribs, and the occupied space of the second auxiliary flow passage 322 is smaller, so that the bubble breaker 400 has a more compact structure under the condition that all the auxiliary flow passages can reduce the air flow speed, and the bubble breaker 400 is beneficial to miniaturization.

It is understood that the size of the throttling area 3211 of the first auxiliary flow passage 321 along the second direction may gradually change or suddenly change, and the size of the decelerating area 3212 of the first auxiliary flow passage 321 along the second direction may gradually change or suddenly change.

In one embodiment, referring to fig. 6, the throttle area 3211 has a dimension D1 along the second direction, the deceleration area 3212 has a dimension D2 along the second direction, and the distance between two second boundary ribs 14421 is D3.

In one embodiment, the first boundary rib 14411 and the first restriction rib 14412 are integrally formed.

In one embodiment, the second boundary rib 14421 and the second restriction rib 14422 are integrally formed.

In one embodiment, referring to fig. 5-8, the flow guiding assembly 14 further includes a limiting boss 145. The number of the limiting bosses 145 is at least two, each limiting boss 145 is connected with the deflector 143 and/or the deflector rib 144, the first matching surface 141 is formed on one of the limiting bosses 145, and the second matching surface 142 is formed on the other limiting boss 145.

In one embodiment, the limiting boss 145, the deflector 143, and the deflector rib 144 are integrally formed.

In an embodiment, referring to fig. 10, the exhaust noise of the pressure cooker using the bubble breaker of the embodiment of the present application, i.e. the curve corresponding to the improved version in the figure, is shown from the test result that the average acoustic power is reduced from 73.59dB of the prototype to 60.71dB of the improved version, and the maximum noise is reduced from 77.65dB of the prototype to 63.97dB of the improved version, so the noise reduction effect is very significant.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

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

Claims (14)

1. A bubble breaker, comprising:

the bottom cover assembly (1) is provided with a main flow channel (11) and a first exhaust hole (12) communicated with the main flow channel (11); and

the upper cover (2) and the bottom cover assembly (1) are surrounded to form a speed reduction flow channel (3) communicated with the first exhaust hole (12), the speed reduction flow channel (3) is at least partially annular so that air flows impact each other to reduce the flow rate of the air flows, a second exhaust hole (21) is formed in the upper cover (2), and the second exhaust hole (21) is used for exhausting the air flows after impact each other.

2. The bubble breaker according to claim 1, wherein the deceleration flow path (3) comprises:

the annular flow channel (31) is communicated with the second exhaust hole (21), and the projection area of the second exhaust hole (21) is positioned in the projection area of the annular flow channel (31) along the axial projection of the annular flow channel (31);

one end of the auxiliary flow channel is communicated with the first exhaust hole (12); and

transition gas pocket (33), be located assist the runner to deviate from the one end of first exhaust hole (12), transition gas pocket (33) intercommunication assist the runner with annular runner (31), first exhaust hole (12) with the arrangement direction of transition gas pocket (33) with the axial cross arrangement of sprue (11).

3. A foam breaker according to claim 2 wherein the first vent hole (12), the transition vent hole (33) and the secondary flow channel are all located inside the annular flow channel (31).

4. The bubble breaker according to claim 2, wherein the number of the auxiliary flow passages is plural, each of the auxiliary flow passages is communicated with the corresponding first vent hole (12), the number of the transition vent holes (33) is one, and the plural auxiliary flow passages are merged at the transition vent holes (33).

5. A foam breaker according to claim 2 wherein the direction in which the first vent hole (12) points towards the transition vent hole (33) is a first direction, the direction crossing the first direction is a second direction, the secondary flow path spans a reference distance along the second direction, and the reference distance increases along the first direction in at least a partial region of the secondary flow path.

6. The bubble breaker of claim 1, wherein the bottom cap assembly (1) comprises:

a bottom cover assembly (13) formed with a mounting cavity (131), the main flow passage (11) being formed in the bottom cover assembly (13), the mounting cavity (131) being located above the main flow passage (11); and

the flow guide assembly (14) is partially positioned in the mounting cavity (131), the first exhaust hole (12) is formed in the flow guide assembly (14), and the flow guide assembly (14), the upper cover (2) and the bottom cover assembly (13) are enclosed into the speed reduction flow channel (3).

7. A bubble breaker according to claim 6, wherein the speed-reducing flow passage (3) comprises an annular flow passage (31), an auxiliary flow passage and a transition air hole (33), the annular flow passage (31) is communicated with the second air vent hole (21), the projection area of the second air vent hole (21) is positioned in the projection area of the annular flow passage (31) along the axial projection of the annular flow passage (31), one end of the auxiliary flow passage is communicated with the first air vent hole (12), the transition air hole (33) is positioned at the end of the auxiliary flow passage away from the first air vent hole (12), the transition air hole (33) is communicated with the auxiliary flow passage and the annular flow passage (31), the arrangement direction of the first air vent hole (12) and the transition air hole (33) is arranged to intersect with the axial direction of the main flow passage (11), the flow guiding assembly (14) and the upper cover (2) are enclosed into the auxiliary flow passage and the transition air hole (33), the flow guide assembly (14), the upper cover (2) and the bottom cover assembly (13) are enclosed into the annular flow channel (31), and the annular flow channel (31) surrounds the flow guide assembly (14).

8. The bubble breaker according to claim 7, wherein the flow guide assembly (14) is formed with a first mating surface (141) and a second mating surface (142) which are arranged at intervals, and the transition air hole (33) is at least partially located between the first mating surface (141) and the second mating surface (142) along the circumferential direction of the flow guide assembly (14);

the bottom lid assembly (13) includes:

a bottom cover body (132), wherein the main flow channel (11) is formed on the bottom cover body (132); and

the limiting rib (133) is located at one end, away from the main flow channel (11), of the bottom cover body (132), the limiting rib (133) and the bottom cover body (132) are enclosed to form the installation cavity (131), the limiting rib (133), the bottom cover body (132), the flow guide assembly (14) and the upper cover (2) are enclosed to form the annular flow channel (31), and the limiting rib (133) is located between the installation cavity (131) and the annular flow channel (31) along the radial direction of the bottom cover body (132);

wherein, the one end of spacing muscle (133) is located first fitting surface (141) are followed the circumference of water conservancy diversion subassembly (14) deviates from one side of transition gas pocket (33), the other end of spacing muscle (133) is located second fitting surface (142) are followed the circumference of water conservancy diversion subassembly (14) deviates from one side of transition gas pocket (33), in order to restrict water conservancy diversion subassembly (14) rotate.

9. The bubble breaker according to claim 8, wherein the shape of the first mating face (141) is different from the shape of the second mating face (142), and/or the size of the first mating face (141) is different from the size of the second mating face (142); one end of the limiting rib (133) is provided with a first limiting surface (1331), the other end of the limiting rib (133) is provided with a second limiting surface (1332), the first limiting surface (1331) is matched with the first matching surface (141), and the second limiting surface (1332) is matched with the second matching surface (142) to prevent the diversion assembly (14) from being reversely installed.

10. The bubble breaker according to claim 6, wherein said flow-directing assembly (14) comprises:

a deflector (143) positioned in the installation cavity (131), the first exhaust hole (12) being formed in the deflector (143); and

the flow guiding ribs (144) are positioned between the flow guiding disc (143) and the upper cover (2), and the flow guiding ribs (144), the flow guiding disc (143), the upper cover (2) and the bottom cover assembly (13) are enclosed into the speed reduction flow channel (3).

11. The bubble breaker according to claim 10, wherein the speed-reducing flow passage (3) comprises an annular flow passage (31), an auxiliary flow passage and a transition air hole (33), the annular flow passage (31) is communicated with the second air vent hole (21), the projection area of the second air vent hole (21) is positioned in the projection area of the annular flow passage (31), one end of the auxiliary flow passage is communicated with the first air vent hole (12), the transition air hole (33) is positioned at the end of the auxiliary flow passage opposite to the first air vent hole (12), the transition air hole (33) is communicated with the auxiliary flow passage and the annular flow passage (31), and the arrangement directions of the first air vent hole (12) and the transition air hole (33) are arranged to intersect with the axial direction of the main flow passage (11);

the flow guide rib (144) includes:

the flow guiding main rib (1441), the flow guiding disc (143), the bottom cover assembly (13) and the upper cover (2) are enclosed to form the annular channel, and the flow guiding main rib (1441), the flow guiding disc (143) and the upper cover (2) are enclosed to form the transition air hole (33); and

the water conservancy diversion is assisted muscle (1442), is located at least partially the water conservancy diversion owner muscle (1441) is followed the radial of bottom cover subassembly (13) deviates from one side of annular channel, water conservancy diversion is assisted muscle (1442) deflector (143) the water conservancy diversion owner muscle (1441) and upper cover (2) enclose and establish into a plurality ofly assist the runner, the quantity of first exhaust hole (12) is a plurality of, assist the runner with correspond first exhaust hole (12) intercommunication.

12. The bubble breaker according to claim 11, wherein the flow guiding auxiliary rib (1442) is located on a side of the flow guiding main rib (1441) facing away from the annular channel in a radial direction of the bottom cap assembly (13), the number of the transition air holes (33) is one, and a plurality of the auxiliary flow passages are merged at the transition air holes (33).

13. The bubble breaker according to claim 11, wherein at least two of the auxiliary flow channels are a first auxiliary flow channel (321), at least one of the auxiliary flow channels is a second auxiliary flow channel (322), the direction of the first vent hole (12) pointing to the transition vent hole (33) is a first direction, and the direction crossing the first direction is a second direction;

the main diversion rib (1441) comprises a first boundary rib (14411) and a first throttling rib (14412), the first boundary rib (14411), the diversion disc (143), the bottom cover assembly (13) and the upper cover (2) enclose the annular flow channel (31) located outside the first boundary rib (14411), the first throttling rib (14412) is connected to one side of the first boundary rib (14411) departing from the annular flow channel, the first boundary rib (14411), the diversion disc (143) and the upper cover (2) enclose the transition air hole (33), and the first exhaust hole (12) and the auxiliary flow channel are located inside the first boundary rib (14411);

the number of the auxiliary flow guiding ribs (1442) is two, each auxiliary flow guiding rib (1442) comprises a second boundary rib (14421) and a second throttling rib (14422), the second throttling rib (14422) is connected to one side of the corresponding second boundary rib (14421) facing away from the other second boundary rib (14421), the first boundary rib (14411), the first throttling rib (14412), each second boundary rib (14421) and the corresponding second throttling rib (14422) are enclosed to correspond to the first auxiliary flow passage (321), the first auxiliary flow passage (321) comprises a throttling area (3211) and a speed reducing area (3212) adjacent to and downstream of the corresponding throttling area (3211), the size of the throttling area (3211) in the second direction is smaller than that of the speed reducing area (3212) in the second direction, and the first throttling rib (14412) and the second throttling rib (14422) correspond one by one to one another, the throttling area (3211) is enclosed between the first throttling rib (14412) and the corresponding second throttling rib (14422), the decelerating area (3212) is enclosed between the first boundary rib (14411), the second boundary rib (14421) and the corresponding first throttling rib (14412) and the corresponding second throttling rib (14422), one side of the second boundary rib (14421) departing from the corresponding second throttling rib (14422), one side of the other second boundary rib (14421) departing from the corresponding second throttling rib (14422), and the first boundary rib (14411) are enclosed into the second auxiliary flow channel (322) between the two first auxiliary flow channels (321), and the distance between the two second boundary ribs (14421) is gradually reduced and gradually increased along the first direction.

14. A pressure cooker, comprising:

a pan body (100);

an exhaust valve core (200) mounted on the pan body (100);

an exhaust valve cover (300) mounted to the exhaust valve spool (200) to open or close the exhaust valve spool (200); and

the bubble breaker (400) according to any one of claims 1 to 13, mounted to the pan body (100), wherein the vent valve cartridge (200) and the vent valve cover (300) are both at least partially located within the main flow channel (11).

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