CN217510303U - Cooking utensil - Google Patents

Abstract

The utility model provides a cooking utensil, including lid, a kind of deep pot body and automatic gas exchange device. The automatic gas exchange device comprises an electric drive unit, a transmission device, a gas flow generating device and a gas inlet and outlet valve device. The air inlet and outlet valve device is connected with the accommodating cavity and comprises a first valve body, a second valve body and a one-way valve film. And the first valve body is provided with an air inlet channel and an air outlet channel which are communicated with the accommodating cavity. The second valve body is provided with a valve air inlet and a valve air outlet, the valve air inlet is communicated with the outside atmosphere, and the valve air outlet is communicated with the cooking space. The check valve membrane is arranged between the first valve body and the second valve body and comprises a membrane body, an air inlet membrane and an air outlet membrane. The first valve body is provided with a first blocking rib, and the second valve body is provided with a second blocking rib. According to the scheme, the bending angle of the diaphragm can be within a reasonable range, the service life of the diaphragm is prolonged, and meanwhile, the airflow noise is reduced.

Description

Cooking utensil

Technical Field

The utility model relates to the technical field of household appliances, more specifically, the utility model relates to a cooking utensil.

Background

In order to increase the cooking rate, the known cooking appliances (such as electric cookers) usually have high heating power, but in the actual use process, when the food materials are heated and boiled by continuous high fire, a large amount of foam is generated, so that the problem of overflowing is caused.

A solution to the above problem is known by using an air pump to blow air into the inner pot of the cooking appliance. The air pump generally has the function of making the one-way business turn over of air current, but current air pump generally realizes the one-way business turn over of air current through making two or more check valve diaphragms install each other in reverse, and the structure is comparatively complicated to this installation need professional instrument to realize, and installation cost is higher. In addition, because the diaphragm in the existing air pump needs to be intermittently bent at a certain angle for a long time to realize the one-way passing of the air flow, the diaphragm is easy to generate fatigue and irreversible deformation, and in addition, a part of the air pump is easy to generate the vortex of the air flow when the air flow passes through, thereby generating air flow noise.

Therefore, there is a need for a reasonable structure to at least partially solve the problems of the prior art.

SUMMERY OF THE UTILITY MODEL

A series of concepts in a simplified form are introduced in the summary section, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

The utility model provides a cooking utensil. The cooking appliance includes:

a cover body;

the cover body is arranged on the cooker body, and when the cover body covers the cooker body, a cooking space is formed between the cover body and the cooker body; and

automatic gas exchange device, automatic gas exchange device set up in lid or a kind of deep pot body, it includes:

an electric drive unit;

a transmission device connected with the electric drive unit so as to be driven by the electric drive unit to reciprocate; the airflow generating device is connected with the transmission device and is provided with an accommodating cavity, and the volume of the accommodating cavity is changed under the reciprocating motion effect of the transmission device;

business turn over pneumatic valve device, business turn over pneumatic valve device with hold the chamber and connect, business turn over pneumatic valve device includes:

the first valve body is provided with an air inlet channel and an air outlet channel which are communicated with the accommodating cavity;

the second valve body is provided with a valve air inlet and a valve air outlet which respectively correspond to the air inlet channel and the air outlet channel, the valve air inlet is communicated with the outside atmosphere, and the valve air outlet is communicated with the cooking space; and

the one-way valve membrane sets up first valve body with between the second valve body, the one-way valve membrane include the membrane body and with this body coupling of membrane and with there is the diaphragm that admits air and the diaphragm of giving vent to anger in the clearance between the membrane body, wherein, be provided with the first muscle that blocks on the first valve body, the first muscle that blocks is in inlet channel's axial direction with it has the distance to admit air between the diaphragm, and/or it blocks the muscle to be provided with the second on the second valve body, the second blocks the muscle and is in axial direction with it has the distance to give vent to anger between the diaphragm.

During cooking, the automatic gas exchange device is capable of drawing in gas through the valve inlet and delivering the gas into the cooking volume through the valve outlet when food in the cooking volume is in a boiling phase. The delivered gas is typically in a cold-hot temperature differential with the foam in the cooking space, so that the delivered gas, after entering the cooking space and contacting the foam accumulated in the cooking space, can liquefy and contract to break the vapor in the foam, preventing it from overflowing the pot. The overflow can be avoided even under the condition of fast cooking with large fire. This scheme still with a plurality of check valve diaphragms integration on a check valve membrane, through combining first valve body and the second valve body that sets up in this check valve membrane both sides, can realize the one-way purpose of business turn over of single passageway of air current, simple structure, convenient operation.

In addition, above-mentioned scheme blocks the muscle through setting up the first muscle that blocks that corresponds with the diaphragm that admits air, the second that corresponds with the diaphragm that gives vent to anger, can play certain effect of blockking respectively when admitting air the diaphragm and the diaphragm that gives vent to anger is buckled to ensure that the motion position that the deformation of diaphragm was buckled is injectd in certain extent, can avoid the diaphragm angle of buckling too big and the production irreversible deformation of fatigue appears on the one hand, and on the other hand can avoid the diaphragm angle of buckling too little and the swirl of air current appears, the production noise.

Optionally, a projection of the first blocking rib on a horizontal plane perpendicular to the axial direction is at least partially located within a projection of the air inlet diaphragm on the horizontal plane, and a projection of the second blocking rib on the horizontal plane is at least partially located within a projection of the air outlet diaphragm on the horizontal plane. According to the valve structure of this scheme, the deformation of accessible diaphragm realizes admitting air and giving vent to anger, ensures simultaneously that the deformation of diaphragm is spacing by blockking the muscle in the distance space of design, can avoid the diaphragm to buckle the angle on the one hand too big and appear tiredly and produce irreversible deformation, and on the other hand can avoid the diaphragm to buckle the angle too little and the swirl of air current appears, produces the noise.

Optionally, the first blocking rib is disposed on an inner peripheral wall of the first valve body that surrounds the air inlet passage and extends radially inward from the inner peripheral wall of the air inlet passage, and the second blocking rib is disposed on an inner peripheral wall of the second valve body that surrounds the valve air outlet and extends radially inward from the inner peripheral wall of the valve air outlet. The scheme can be more convenient to manufacture and easy to realize.

Optionally, the first valve body is provided with two first blocking ribs arranged oppositely along a first direction, and/or the second valve body is provided with two second blocking ribs arranged oppositely along a second direction. Can improve in this scheme and block the muscle block the effect to make the diaphragm angle of buckling at reasonable within range, when improving the diaphragm life-span, reduce the air current noise.

Optionally, the air inlet membrane and the membrane body are connected through two first connecting ribs oppositely arranged along a third direction, and/or the air outlet membrane and the membrane body are connected through two second connecting ribs oppositely arranged along a fourth direction. The scheme has simple structure and is easy to realize.

Optionally, the first direction is perpendicular to the third direction and/or the second direction is perpendicular to the fourth direction. This scheme makes two first muscle that block correspond with the both ends that the diaphragm buckles just in time of admitting air to improve and block the effect, and can make two seconds block the muscle and correspond with the both ends that the diaphragm buckles just in time of giving vent to anger, thereby improve and block the effect.

Optionally, the widths w of the first connecting rib and the second connecting rib are the same, the air inlet diaphragm and the air outlet diaphragm are both configured as circular diaphragms, the diameter of the air inlet diaphragm is Φ 2, and the diameter of the air outlet diaphragm is Φ 1, where a minimum distance h5 between the air inlet diaphragm and the first blocking rib satisfies: 0.4 (phi 2-0.5w) ≦ h5 ≦ 0.9 (phi 2-0.5w), and/or a minimum distance h6 between the vent membrane and the second barrier rib satisfies: h6 is more than or equal to 0.4 (phi 1-0.5w) and less than or equal to 0.9 (phi 1-0.5 w). The scheme can ensure that the bending angle of the diaphragm is within a reasonable range (20-70 degrees), on one hand, the phenomenon that the diaphragm is too large in bending angle and fatigue generates irreversible deformation can be avoided, and on the other hand, the phenomenon that the diaphragm is too small in bending angle and vortex of airflow occurs and noise is generated can be avoided.

Optionally, the air inlet diaphragm and the air outlet diaphragm are both configured as circular diaphragms, the diameter of the air inlet diaphragm is Φ 2, the diameter of the air outlet diaphragm is Φ 1, and the minimum radial distance L3 between the circle center of the air inlet diaphragm and the first blocking rib satisfies: l3 is less than or equal to 0.5 phi 2, and/or the minimum radial distance L4 between the center of the air outlet diaphragm and the second blocking rib satisfies the following condition: l4 is less than or equal to 0.5 phi 1. This scheme can prevent that first length that blocks the muscle along radially blockking is too little and the diaphragm card appears and advance between the first muscle that blocks, leads to the problem that the diaphragm buckled the inefficacy to can prevent that the second from blockking that the muscle is too little along the length that radially blocks and the diaphragm card appears and advance between the muscle, lead to the problem that the diaphragm buckled the inefficacy.

Optionally, a first supporting portion is arranged at a position, corresponding to the air outlet membrane, on the first valve body, the first supporting portion abuts against the air outlet membrane, a second supporting portion is arranged at a position, corresponding to the air inlet membrane, on the second valve body, and the second supporting portion abuts against the air inlet membrane. The scheme can realize the purpose of unidirectional inlet and outlet of a single airflow channel, and has simple structure and convenient operation.

Optionally, a valve plate groove is arranged on the first valve body, and the one-way valve membrane is assembled in the valve plate groove. The scheme can make the structure of the air valve device more compact.

Optionally, the first support portion is configured as a first collar projecting towards the outlet diaphragm, the first collar being arranged around the outlet passage, the second support portion is configured as a second collar projecting towards the inlet diaphragm, the second collar being arranged around the valve inlet. This scheme can make first retaining ring and second retaining ring realize blockking the effect that the corresponding diaphragm buckled better to simple structure, easily realization.

Optionally, the accommodating cavity is configured as a flexible cavity, and the side wall of the flexible cavity is a corrugated structure comprising at least one wave crest configuration. The scheme makes the flexible cavity be compressed and stretched more easily, not easy to break and reliable in fatigue life by constructing the side wall of the flexible cavity into a corrugated structure.

Optionally, the corrugated structure includes n peak configurations, where 2 ≦ n ≦ 8. The scheme can enable the structure of the flexible cavity to be more compact under the condition of realizing the atmospheric flow.

Optionally, a steam channel for communicating the cooking space with the outside of the cooking appliance is arranged on the cover body, and the steam channel is communicated with the outside of the cooking appliance through a steam outlet arranged on the cover body;

the cover body is also provided with a cover air inlet which is communicated with the valve air inlet, and the position of the steam outlet on the cover body is positioned on the outer peripheral side of the cover air inlet.

In this scheme, because the steam outlet sets up around the lid air inlet, consequently, steam via steam outlet exhaust can form around the lid air inlet and the top in the circumference in succession or confined steam curtain to filter the gas of inhaling the lid air inlet, avoided debris such as oil smoke, dust to inhale in the lid air inlet, thereby left greasy dirt or dirt and even blockked up in having avoided the gas pipeline, also avoided influencing the taste of food.

Optionally, the transmission device comprises an eccentric wheel and an eccentric connecting rod connected with the eccentric wheel, the eccentric wheel is connected with the electric driving unit, the electric driving unit can drive the eccentric wheel and the eccentric connecting rod to rotate, and the eccentric connecting rod is connected with the airflow generation device. The scheme is convenient to assemble and easy to realize.

Optionally, the air flow generating device includes a closed end and an air guide end respectively located at two ends of the accommodating cavity, the eccentric link is connected to the closed end, and the air inlet and outlet valve device is connected to the air guide end. The scheme is convenient to assemble and easy to realize.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic cross-sectional view of a portion of a cooking appliance according to an embodiment of the present invention;

FIG. 2 is a schematic top view of a portion of the lid of the cooking appliance shown in FIG. 1, with the face cover omitted to clearly show the structure of the interior of the lid;

FIG. 3 is a schematic sectional view of the cover shown in FIG. 2 taken along the direction A-B-C, in which a portion of the structure of the cover is omitted;

FIG. 4 is a schematic sectional view of the cover shown in FIG. 2 taken along the direction M-N-C, in which a portion of the structure of the cover is omitted;

FIG. 5 is a schematic cross-sectional view of an automatic gas exchange device of the cooking appliance shown in FIG. 1;

FIG. 6 is an assembled schematic view of the electric drive unit, transmission and gas flow generating device of the automatic gas exchange device shown in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the gas flow generating device of the automatic gas exchange device shown in FIG. 5;

FIG. 8 is a schematic cross-sectional view of an inlet and outlet gas valve assembly of the automatic gas exchange device shown in FIG. 5;

FIG. 9 is another schematic cross-sectional view of the air inlet and outlet valve assembly of the automatic gas exchange device shown in FIG. 5, wherein the air inlet and outlet valve assembly is in an exploded state;

FIG. 10 is another schematic cross-sectional view of the air inlet and outlet valve assembly of the automatic gas exchange device shown in FIG. 5, wherein the air inlet and outlet valve assembly is in an assembled state;

FIG. 11 is a schematic view of a one-way valve membrane of the access valve assembly shown in FIGS. 8-10;

FIG. 12 is a right side elevational view, in full, of the access valve assembly illustrated in FIG. 8 as viewed from the right side;

fig. 13 is a schematic view of a portion of a lid of a cooking appliance, according to an embodiment of the present invention;

fig. 14 is a perspective view of an automatic gas exchanging apparatus of the cooking appliance shown in fig. 1, in which a damper housing is provided outside the automatic gas exchanging apparatus.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details set forth herein which are known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions and should not be construed as being limited to the embodiments set forth herein.

The utility model provides a cooking utensil. The cooking appliance may be an electric rice cooker, an electric pressure cooker or other electric heating appliance. In addition, the cooking appliance may have other functions such as cooking porridge and cooking soup in addition to the function of cooking rice.

As shown in fig. 1, the cooking appliance 100 includes a pot body 110. The pot body 110 may have a generally rounded rectangular parallelepiped shape, a generally cylindrical shape, or any other suitable shape. The pot body 110 has a substantially cylindrical shape or any other suitable shape of the inner pot 130 disposed therein. The inner pot 130 can be freely put into or taken out of the inner pot receiving part of the pot body 110 to facilitate the cleaning of the inner pot 130. The inner pot 130 is used to store food to be cooked, such as rice, soup, etc. The top of the inner pot 130 has a top opening. The user can store food to be cooked in the inner pot 130 through the top opening or take cooked food out of the inner pot 130 through the top opening.

An inner pot heating means (not shown) for heating the inner pot 130 is further provided in the pot body 110. The inner pot heating means may heat the inner pot 130 at the bottom and/or side of the inner pot 130. The inner pot heating device can be an electric heating tube, and can also be an induction heating device such as an electromagnetic coil.

As shown in fig. 1, the pot body 110 is provided with a lid 120. The shape of the cover 120 substantially corresponds to the shape of the pot body 110. For example, the cover 120 may have a rounded rectangular parallelepiped shape. The cover body 120 includes an inner cover 123, and the inner cover 123 may be a detachable inner cover so that the inner cover 123 can be detached for cleaning. The lid 120 is provided at the pot body 110 in an openable and closable manner for covering the entire top of the pot body 110 or at least the inner pot 130 of the pot body 110. Specifically, in the present embodiment, the lid body 120 may be pivotably provided above the pot body 110 between the maximum open position and the closed position by, for example, a hinge. The hinged position of the lid 120 and the pot body 110 is generally located at the rear end of the cooking appliance 100, so that the user can operate at the front end of the cooking appliance 100. It should be noted that the terms "front" and "rear" are used herein with reference to the position where the user uses the cooking appliance. Specifically, a direction in which the cooking appliance faces the user is defined as "front", and a direction opposite thereto is defined as "rear".

As shown in fig. 1, when the cover 120 is closed over the pot body 110, a cooking space 140 is formed between the cover 120 and the pot body 110 (specifically, the inner pot 130 of the pot body 110). The cooking space 140 includes a food storage space 141 and a cavity space 142. Specifically, the food storage space 141 refers to a space where food is actually stored. The cavity space 142 is located above the food storage space 141. That is, when the cover 120 is covered on the pot body 110, the cavity space 142 is a space between the upper surface of the food and the cover 120. There is no strict distinction between the food storage space 141 and the cavity space 142, and the volume of the two spaces may change according to the specific change of the food material volume.

It should be noted that directional terms and positional terms used herein in describing the respective components and their positional relationships in the cover body 120, such as "above", "below", "upper side", "lower side", "upward", "downward", "above", "below", "high", "low", "horizontal distance", etc., are relative to the cover body 120 when in the covering position.

As shown in fig. 1, the cover 120 is provided with a cover inlet 121. One end of the cover air inlet 121 communicates with the outside, and the other end communicates with an automatic air exchanging device 150 (as shown in fig. 2, more specifically, an air inlet end of the automatic air exchanging device 150) provided in the pot body 110 or the cover body 120, which will be described in detail later, to deliver the outside air (e.g., cold air) to the cooking space 140 (more specifically, the cavity space 142) through the automatic air exchanging device 150.

Hereinafter, an automatic gas exchange device according to an embodiment of the present invention will be described in detail.

The cooking appliance 100 further includes an automatic gas exchange device 150, and the automatic gas exchange device 150 is used for sucking gas (e.g., external cold air) outside the cooking appliance 100 into the cavity space 142. Preferably, the automatic gas exchange device 150 is provided in the cover 120.

The automatic gas exchange device 150 may be disposed at any suitable location of the cooking appliance 100. In a preferred embodiment of the present invention, as shown in fig. 1 to 4, an automatic gas exchange device 150 is provided in the cover body 120 so as to communicate with a cover air inlet 121 provided in the cover body 120 through an air inlet line. It is further preferred that the automatic gas exchange device 150 be generally horizontally recumbent in the cover 120 to reduce the size of the cover 120 in the vertical direction. For example, the automatic gas exchange device 150 may be disposed between the inner liner and the upper cover of the cover 120.

As shown in fig. 5, the automatic gas exchange device 150 includes an electric driving unit 151, a transmission device 160, a gas flow generating device 170, and an inlet and outlet gas valve device 180 connected to the gas flow generating device 170. The electric drive unit 151 may be configured as a motor. The transmission 160 is connected to the electric drive unit 151 such that the electric drive unit 151 can drive the transmission 160 to reciprocate. The air flow generating means 170 has an air flow receiving chamber, preferably a flexible chamber 171, and the flexible chamber 171 is connected to the actuator 160 so as to be changed in shape by the reciprocating motion of the actuator 160. Specifically, the flexible chamber 171 can be switched between a squeezed state and a restored state, and when the flexible chamber 171 is switched between the two states, the volume of the flexible chamber 171 can be changed, so that a pressure change can be generated in the flexible chamber 171. The air inlet and outlet valve device 180 is connected with the flexible cavity 171, the air inlet and outlet valve device 180 is provided with a valve air inlet 181 and a valve air outlet 182 which can be communicated with the cavity of the flexible cavity 171, and the valve air inlet 181 and the valve air outlet 182 are both one-way through ports. The valve inlet port 181 is in communication with the ambient atmosphere such that ambient atmosphere may enter the flexible chamber 171 via the valve inlet port 181. Valve outlet 182 communicates with the cooking volume such that gas in flexible chamber 171 can enter the cooking volume via valve outlet 182. The structure of the air valve unit 180 will be described in detail later.

Specifically, the valve inlet port 181 communicates with the cap inlet port 121 through an inlet line (not shown) to allow the outside atmosphere to enter. A first end of the inlet line communicates with the lid inlet port 121 and a second end of the inlet line is connected to the valve inlet port 181. The valve outlet 182 communicates with the lid outlet 122 via an outlet conduit (outlet route can refer to fig. 4), and the lid outlet 122 can be disposed on the inner lid to allow the outside atmosphere to enter the cooking space. The inlet and outlet conduits may be made of an elastomeric material such as silicone.

As shown in fig. 5, the transmission device 160 includes an eccentric 161 and an eccentric link 162 connected to the eccentric 161, the eccentric 161 is connected to the electric driving unit 151, the electric driving unit 151 can drive the eccentric 161 to rotate, the eccentric 161 can drive the eccentric link 162 to rotate, and the eccentric link 162 is connected to the flexible chamber 171. Specifically, the air flow generating device 170 includes a closed end 172 and an air guide end 173 respectively located at both ends of the flexible chamber 171, the eccentric link 162 is connected to the closed end 172, and the air inlet and outlet valve device 180 is connected to the air guide end 173.

As shown in fig. 6 and 7, the closed end 172 of the flexible chamber 171 has a through hole 174, the through hole 174 penetrates in the longitudinal direction of the eccentric link 162, and the eccentric link 162 extends into the through hole 174. When the eccentric link 162 rotates, the flexible chamber 171 is reciprocated in the axial direction thereof.

In a preferred embodiment, the side wall of the flexible chamber 171 is configured as a corrugated structure, and the corrugated flexible chamber 171 may be brought to be compressed and stretched reciprocally when the eccentric link 162 rotates. As shown in fig. 5 and 7, the corrugated structure has a first end wall 171a adjacent the transmission 160. A closed end 172 is connected to the first end wall 171 a. The corrugated structure includes a plurality of peak configurations. This solution enables the flexible chamber 171 to be more easily compressed and stretched, and less easily broken, and has a reliable fatigue life by configuring the sidewalls of the flexible chamber 171 as a corrugated structure.

Because the air cavity quantity of flexible chamber and air flow size become the positive correlation's relation, for making the air flow be greater than 2L/min to satisfy the requirement of quick cooking, and for making this flexible chamber can more adapt to the size of current cooking utensil's inside lining (current cooking utensil's inside lining diameter is less than 245mm usually), in this scheme, make the quantity n of crest structure satisfy: n is more than or equal to 2 and less than or equal to 8. Further preferably, the number n of peak configurations satisfies: n is more than or equal to 2 and less than or equal to 4. Illustratively, the corrugated structure may include 2 or 3 wave peak configurations, which can be set by one skilled in the art according to actual needs.

In order to reduce the area where two adjacent corrugations contact during the reciprocating motion of the flexible chamber 171, thereby reducing friction and noise, it is preferable that, as shown in fig. 7, the width L1 of the individual wave troughs in the corrugated structure in the axial direction of the flexible chamber 171 satisfies: l1 is more than or equal to 1mm and less than or equal to 2mm, and the minimum distance L2 between two adjacent wave crests meets the requirement that L2 is more than or equal to 3mm and less than or equal to 4 mm. This scheme can minimize the area where the adjacent two corrugations contact by setting the width of the single wave trough in the axial direction of the flexible chamber 171 and the minimum distance between the adjacent two wave crests within the above-mentioned ranges, and can ensure that the adjacent two wave crests do not contact while contacting at the maximum, so that the friction between the adjacent corrugations can be reduced, the service life thereof can be improved, and the scheme can also reduce the noise generated by the friction between the adjacent corrugations. Further, by setting the interval between the adjacent two peaks within the above range, the air flow amount can be secured. For example, the width L1 of a single wave trough along the axial direction of the flexible cavity 171 may be set to 1.5mm, 1.8mm, etc., and the minimum distance L2 between two adjacent wave crests may be set to 3.5mm, 3.6mm, etc., which may be set by one skilled in the art according to actual needs.

It will be appreciated that as eccentric link 162 switches flex chamber 171 between the compressed and extended states, eccentric link 162 exerts a radially directed force on flex chamber 171 as well as axially directed forces F1 and F2, as shown in fig. 7. This may cause relative slippage at the junction of the closed ends 172 of the flexible chamber 171 and may also cause the flexible chamber 171 to deflect and rub to generate noise. Therefore, in the cooking appliance according to the present invention, the wall thickness h2 of the first end wall 171a of the corrugated structure is made greater than the wall thickness h1 of the remaining main portion of the corrugated structure, and h2-h1 are not less than 1.2 mm. Illustratively, h2 may be 1mm or 1.2mm, etc., larger than h 1.

In the above-mentioned scheme, the wall thickness of the first end wall 171a of the corrugated structure close to the eccentric link 162 is greater than the wall thickness of the rest of the main body of the corrugated structure, so that the strength and stability of the first end wall 171a can be enhanced, the relative deflection of the flexible cavity 171 during movement can be avoided, and the friction between the flexible cavity 171 and the eccentric link 162 and the noise generated thereby can be reduced. Further, this arrangement can prevent the first end wall 171a from rubbing against the valleys of the body portion to generate noise as much as possible during movement.

Further preferably, the wall thickness h1 of the remaining body part of the corrugated structure satisfies: 0.2mm h1 ≦ 1.2mm, where the main body portion of the corrugated structure refers to the middle main body section of the corrugated structure and does not include the closed end 172 and the air guide end 173. Illustratively, the wall thickness h1 of the main body part can be set to 0.5mm, 0.8mm, 1mm, etc., which can be set by one skilled in the art according to actual needs. This scheme is through setting up the wall thickness of flexible chamber 171 in above-mentioned within range, can be under the prerequisite of guaranteeing the elasticity compressive force of flexible chamber 171, prolongs the fatigue life of this flexible chamber 171, avoids it to appear warping, influences the air flow.

Preferably, the relationship between the diameter D of the crest formation and the diameter D of the trough formation of the corrugated structure satisfies: d is more than or equal to 5mm and less than or equal to D and less than or equal to 50 mm. The applicant has found that by making the diameter D of the wave trough configuration greater than or equal to 5mm, it is possible to make the automatic gas exchange device 150 achieve an air flow rate greater than 2L per minute, and furthermore, by making the diameter D of the wave crest configuration less than or equal to 50mm, it is possible to make the structure of the flexible chamber 171 more compact, and thus easier to place in the lid of the cooking appliance 100, and to make the structure of the cooking appliance 100 more compact. Further preferably, the relationship between the diameter D of the peak formation and the diameter D of the valley formation of the corrugated structure satisfies: d is more than or equal to 10mm and less than or equal to 25 mm.

The gas inlet and outlet valve device 180 can realize the one-way passage of gas. Specifically, as shown in fig. 5 and 8-10, the inlet and outlet gas valve assembly 180 includes a first valve body 178, a second valve body 179, and a one-way valve membrane 183 disposed between the first valve body 178 and the second valve body 179. The first valve body 178 is disposed closer to the flexible cavity 171, the first valve body 178 is provided with an air inlet channel 184 and an air outlet channel 185, the air inlet channel 184 and the air outlet channel 185 are both communicated with the flexible cavity 171, the air inlet channel 184 and the air outlet channel 185 respectively correspond to the valve air inlet 181 and the valve air outlet 182, and the valve air inlet 181 and the valve air outlet 182 are respectively disposed on the second valve body 179.

The check valve film 183 includes a film body 183a, and an inlet diaphragm 186 and an outlet diaphragm 187 corresponding to the valve inlet 181 and the valve outlet 182, respectively, and the check valve film 183 is made of a flexible material. Both of the inlet diaphragm 186 and the outlet diaphragm 187 are connected to the diaphragm body 183a, and a gap 183b extending in the circumferential direction is provided between each of the inlet diaphragm 186 and the outlet diaphragm 183 a.

Further, in order to achieve one-way passage of gas, a first retainer 188 (as an example of a first support portion) is provided at a position of the first valve body 178 corresponding to the valve outlet 182, and the first retainer 188 protrudes toward the outlet diaphragm 187 and abuts on the outlet diaphragm 187. A first retainer ring 188 is disposed around the air outlet passage 185. A second stopper 189 (as an example of a second support portion) is provided at a position of the second valve body 179 corresponding to the valve inlet port 181, and the second stopper 189 protrudes toward the inlet diaphragm 186 and abuts on the inlet diaphragm 186. A second stop 189 is disposed about the valve inlet 181.

When an external air flow passes from the valve inlet port 181 into the flexible chamber 171, the air flow bends the intake diaphragm 186 so that it can pass through the gap 183b between the intake diaphragm 186 and the diaphragm body 183a and enter the flexible chamber 171 through the intake passage 184. At this time, the air flow enters the valve outlet 182, but the air flow cannot pass through because the air outlet diaphragm 187 is blocked by the first retaining ring 188 and cannot be bent; similarly, when the air flow inside the flexible cavity 171 enters the cooking space through the valve outlet 182, the air outlet diaphragm 187 is bent by the air flow and can flow out through the gap 183b between the air outlet diaphragm 187 and the diaphragm body 183a and through the valve outlet 182, and meanwhile, the air flow inside the flexible cavity 171 also passes through the air inlet channel 184, but the air inlet diaphragm 186 cannot be bent because it is blocked by the second stopper 189, so that the air flow cannot pass through. The purpose of single channel one-way passing can be achieved through the mode.

According to the scheme, a plurality of one-way valve membranes are integrated on one-way valve membrane, and the purpose of unidirectional inlet and outlet of a single airflow channel can be realized by combining the first valve body 178 and the second valve body 179 which are arranged on two sides of the one-way valve membrane, so that the structure is simple, and the operation is convenient.

As shown in fig. 9 and 11, inlet diaphragm 186 and outlet diaphragm 187 are each configured as circular diaphragms. In order to prevent the vent membrane 187 from being stuck in the vent path 185 due to an excessive bending angle of the vent membrane 187 when a large air flow passes through the vent membrane 187, a relationship between a diameter Φ 1 of the vent membrane 187 and a diameter Φ 1' of the first stopper 188 satisfies: phi 1 is more than or equal to 2 phi 1'. Also, in order to prevent the intake diaphragm 186 from being bent at an excessive angle to be caught in the valve intake port 181 when a large air flow passes through the intake diaphragm 186, it is preferable that the relationship between the diameter Φ 2 of the intake diaphragm 186 and the diameter Φ 2' of the second stopper 189 satisfies: phi 2 is more than or equal to 2 phi 2'.

As shown in fig. 9, preferably, the thickness of inlet diaphragm 186 is the same as that of outlet diaphragm 187, and both the thickness of inlet diaphragm 186 and the thickness of outlet diaphragm 187 are smaller than that of membrane body 183 a. In one embodiment, this is achieved by providing a recess in the check valve membrane 183. Specifically, the recess at inlet diaphragm 186 opens toward first valve body 178, and the recess at outlet diaphragm 187 opens toward second valve body 179. This arrangement makes it easier for inlet diaphragm 186 and outlet diaphragm 187 to deform during inlet and outlet, thereby facilitating the passage of gas.

Preferably, the relationship between thickness h1 of inlet diaphragm 186 and thickness h1 of outlet diaphragm 187 and thickness h2 of diaphragm body 183a satisfies: 1/4h2 is not more than h1 is not more than 3/4h 2. This scheme is through the thickness setting that will admit air diaphragm 186 and the diaphragm 187 of giving vent to anger in above-mentioned within range, can be so that admit air diaphragm 186 and the diaphragm 187 of giving vent to anger all have suitable thickness, can avoid the too thick condition that leads to the angle of buckling too little and appear blowing whistle noise of diaphragm on the one hand, can avoid the diaphragm too thin to lead to the angle of buckling great simultaneously, influences the fatigue life of diaphragm and irreversible deformation appears.

Preferably, the first valve body 178 is provided with a valve sheet groove 178a, and the check valve film 183 is fitted in the valve sheet groove 178 a. The valve flap groove 178a has a depth h3 in the axial direction, wherein the thickness h2 of the membrane body 183a is greater than the depth h3 of the valve flap groove 178 a. This arrangement can ensure that the check valve film 183 is interference-fitted between the first valve body 178 and the second valve body 179, and thus can have a good sealing property. Further preferably, the thickness h2 of the film body 183a and the depth h3 of the valve sheet groove 178a satisfy: h2-h3 is more than 0.2mm and less than 1 mm. This arrangement further ensures that the check valve membrane 183 has a good sealing property between the first valve body 178 and the second valve body 179.

As shown in fig. 11, the inlet diaphragm 186 and the diaphragm body 183a are connected by two first connecting ribs 186a disposed opposite to each other, and the outlet diaphragm 187 and the diaphragm body 183a are connected by two second connecting ribs 187a disposed opposite to each other. Preferably, the first and second tie ribs 186a and 187a have the same width w. The width of the tie bars referred to herein refers to the extension of the tie bars in the circumferential direction of the membrane sheet. Because the diaphragm 186 that admits air and the diaphragm 187 of giving vent to anger receive intermittent type nature to make a round trip to buckle for a long time, in order to prevent its fatigue fracture's problem, the width of splice bar is crucial, and the too wide angle that can influence the diaphragm and buckle of splice bar, and the too narrow again of splice bar reduces intensity, and the width of splice bar is also relevant with the diameter of the diaphragm 186 that admits air and the diaphragm 187 of giving vent to anger simultaneously. Therefore, in a preferred embodiment, the width w of the first connecting rib 186a and the second connecting rib 187a and the diameter Φ 2 of the inlet diaphragm 186 and the diameter Φ 1 of the outlet diaphragm 187 satisfy: 0.2 phi 2 < w < 0.5 phi 1. This scheme can improve the joint strength between diaphragm and the membrane body 183a, prevents that admit air diaphragm 186 and the diaphragm 187 of giving vent to anger from receiving intermittent back and forth bending fatigue fracture for a long time.

Preferably, the head of the first retainer ring 188 is flush with the groove bottom of the valve plate groove 178a, and the head of the second retainer ring 189 is flush with the surface of the second valve body 179 closest to the first valve body 178. This arrangement can further ensure that the check valve diaphragm 183 can fit tightly and compactly between the first valve body 178 and the second valve body 179.

In order to prevent the diaphragm from being deformed irreversibly by fatigue due to too large bending angle and to prevent the diaphragm from being deformed irreversibly by swirl of air flow due to too small bending angle, and to generate noise, as shown in fig. 8 to 10, the first valve body 178 is provided with a first blocking rib 176, the first blocking rib 176 is spaced from the intake diaphragm 186 in the axial direction of the intake passage 184 by a certain distance, and a projection of the first blocking rib 176 on a horizontal plane perpendicular to the axial direction (i.e., a horizontal plane parallel to the check valve diaphragm) is at least partially located within a projection of the intake diaphragm 186 on the horizontal plane, which can be referred to fig. 12. Second blocking rib 177 is disposed on second valve body 179, second blocking rib 177 is spaced apart from outlet diaphragm 187 in the above axial direction, and a projection of second blocking rib 177 on a horizontal plane is at least partially located within a projection of outlet diaphragm 187 on the same horizontal plane.

Above-mentioned scheme is through setting up the first muscle 176 that blocks that corresponds with the diaphragm 186 that admits air, the second that corresponds with the diaphragm 187 of giving vent to anger blocks the muscle 177, can make first muscle 176 that blocks stop and the second stops the muscle 177 and play certain effect of blockking when admitting air diaphragm 186 and the diaphragm 187 of giving vent to anger buckles respectively, thereby make the angle of buckling of diaphragm in reasonable within range, can avoid the diaphragm angle of buckling too big and appear tired production irreversible deformation on the one hand, on the other hand can avoid the diaphragm angle of buckling too little and the swirl of air current appears, the noise is generated.

As shown in fig. 8, the first blocking rib 176 is provided on the inner peripheral wall of the first valve body 178 that surrounds the intake passage 184 and extends a certain distance in the axial direction of the intake passage 184, and the first blocking rib 176 extends radially inward from the inner peripheral wall of the intake passage 184. The second blocking rib 177 is provided on the inner peripheral wall of the second valve body 179 that surrounds the valve outlet 182 and extends a certain distance in the axial direction of the valve outlet 182, and the second blocking rib 177 extends radially inward from the inner peripheral wall of the valve outlet 182. The scheme can be more convenient to manufacture and easy to realize.

As shown in fig. 12, the first valve body 178 is preferably provided with two first blocking ribs 176 oppositely arranged along a first direction D1, and the second valve body 179 is preferably provided with two second blocking ribs 177 oppositely arranged along a second direction D2 (not shown), and the first direction D1 and the second direction D2 are preferably the same. This scheme can improve the first muscle 176 that blocks and the second blocks the effect that blocks of muscle 177 to make the diaphragm angle of buckling at reasonable within range, when improving the diaphragm life-span, reduce the air current noise.

As schematically shown in fig. 11, the two first tie ribs 186a are oppositely disposed in the third direction D3, and the two second tie ribs 187a are oppositely disposed in the fourth direction D4, and it can be seen that the third direction D3 is the same as the fourth direction D4. Referring to fig. 12, preferably, the first direction D1 is perpendicular to the third direction D3, and the second direction D2 is perpendicular to the fourth direction D4. This scheme makes two first muscle 176 that block when admitting air diaphragm 186 buckles can just in time correspond with the both ends that admit air diaphragm 186 buckles to the improvement blocks the effect, and can make two second when giving vent to anger diaphragm 187 buckles block muscle 177 can just in time correspond with the both ends that give vent to anger diaphragm 187 buckles, thereby the improvement blocks the effect.

Preferably, as shown in fig. 10, the minimum distance h5 between the intake diaphragm 186 and the first blocking rib 176 satisfies: 0.4 (phi 2-0.5w) ≦ h5 ≦ 0.9 (phi 2-0.5w), and a minimum distance h6 between air escape patch 187 and second barrier rib 177 satisfies: h6 is more than or equal to 0.4 (phi 1-0.5w) and less than or equal to 0.9 (phi 1-0.5 w). The scheme can ensure that the bending angle of the diaphragm is within a reasonable range (20-70 degrees), on one hand, the phenomenon that the diaphragm is too large in bending angle and fatigue generates irreversible deformation can be avoided, and on the other hand, the phenomenon that the diaphragm is too small in bending angle and vortex of airflow occurs and noise is generated can be avoided.

As shown in fig. 12, the minimum radial distance L3 between the center of the inlet diaphragm 186 and the first blocking rib 176 preferably satisfies: l3 is less than or equal to 0.5 φ 2, and the minimum radial distance L4 (not shown in FIG. 12) between the center of the air outlet diaphragm 187 and the second barrier rib 177 satisfies: l4 is less than or equal to 0.5 phi 1. This scheme can prevent that first length that blocks muscle 176 and radially block is too little and the diaphragm card appears and advance between the first muscle 176 that blocks, leads to the problem that the diaphragm became invalid of buckling to can prevent that the second from blockking that the length that muscle 177 radially blocked is too little and the diaphragm card appears and advance between the second muscle 177, lead to the problem that the diaphragm buckled and became invalid.

During cooking, when the temperature of the food cooked in the inner pot is critical boiling or just before boiling over for a certain period of time, or when the temperature in the inner pot reaches a set value, viscous substances such as starch in the food are precipitated into water, and steam is wrapped to form a large amount of foam, which is accumulated in the cavity space 142 above the food storage space 141. The electric driving unit 151 can be controlled to drive the transmission 160 to reciprocate, so as to compress and stretch the flexible chamber 171. When the eccentric 161 is in a position proximate to the flexible chamber 171, the flexible chamber 171 is compressed, the chamber volume is reduced, the chamber interior air pressure is greater than the chamber exterior air pressure, forcing air out through the air outlet passage 185 and the valve air outlet 182. When the eccentric 161 is in a position away from the flexible chamber 171, the flexible chamber 171 is stretched, the volume of the chamber is increased instantaneously, the air pressure inside the chamber is small, and the air with the large external pressure enters the flexible chamber 171 through the valve inlet 181 and the air inlet passage 184. The compression and extension of the compliance chamber 171 is accomplished in a cycle of motion that is continuous, and thus there is a continuous flow of gas out of the valve outlet port 182 into the chamber volume 142. Generally, the temperature difference between the delivered gas and the foam in the chamber space 142 exists, so that the delivered gas can liquefy and shrink the steam in the foam to be broken after entering the chamber space 142 and contacting the foam accumulated in the chamber space 142, thereby preventing the overflow. The overflow can be avoided even under the condition of fast cooking with large fire.

As shown in fig. 1, 3 and 13, the cover body 120 is further provided with a steam valve assembly 190, the steam valve assembly 190 includes a steam passage 191 communicating the cooking space with the outside of the cooking appliance, a steam inlet 192 and a steam outlet 193, and the steam outlet 193 may be provided on the decorative cover of the cover body 120 for discharging steam. The steam inlet 192 communicates with the cavity space 142. The steam inlet 192 may be provided on the inner lid 123.

As described above, the gas supplied from the automatic gas exchange device 150 can liquefy and contract the vapor in the foam accumulated in the chamber space 142 and break the vapor after entering the chamber space 142. The transferred gas can be discharged to the outside together with or in the form of steam through the steam inlet 192, the steam channel 191 and the steam outlet 193 after striking the bubbles, taking away a part of heat, so that the generation of bubbles can be suppressed, and the pressure can be lowered to further prevent overflowing.

In a preferred embodiment, as shown in FIG. 13, the vapor outlet 193 is disposed around the lid air inlet 121. I.e. the steam outlet 193 is provided around the lid air inlet 121. During the operation of the cooking appliance 100, when the food in the food storage space 141 is in the boiling stage, a large amount of steam is generated in the cavity space 142, and the steam is discharged through the steam inlet 192, the steam channel 191 and the steam outlet 193. At the same time, the automatic gas exchange device 150 also starts to operate to suck gas from the cap gas inlet 121 and to transfer the sucked gas into the chamber space 142 through the cap gas outlet 152, as described above. Because the steam outlet 193 is disposed around the cover inlet 121, the steam discharged through the steam outlet 193 forms a circumferentially continuous or closed steam curtain around and above the cover inlet 121 to filter the air sucked into the cover inlet 121, thereby preventing impurities such as oil smoke and dust from being sucked into the cover inlet 121, avoiding oil stains or dirt from remaining in the gas pipeline and even blocking the gas pipeline, and also avoiding affecting the taste of food.

Specifically, in one embodiment of the present invention, as shown in fig. 13, the steam outlet 193 is disposed around the cap air inlet 121. The steam outlet 193 includes a plurality of (e.g., 2, 3, or more) sub-steam outlets arranged at intervals in a circumferential direction thereof. The plurality of sub-steam outlets may or may not be equally spaced. The sub-vapor outlets may be in any suitable shape, such as arc, circle, rectangle, etc. The plurality of sub-steam outlets may be identical in shape or different in shape.

In a further embodiment of the invention, which is not shown, the steam outlet 193 is designed as a circumferentially closed ring which surrounds the cover air inlet 121. It should be noted that the term "annular" as used herein refers to any suitable shape that is closed or end-to-end in the circumferential direction and is hollow, and the outer contour may be any suitable shape such as circular, rectangular, pentagonal, hexagonal, etc.

Preferably, the cap body 120 further includes a stopper member (not shown). The stopper member covers a first end of the intake pipe, that is, an end communicating with the cap intake port 121, and forms an intake gap with the first end of the intake pipe. On the one hand, the stop component can cover the first end of the air inlet pipeline, so that the first end of the air inlet pipeline is prevented from being exposed outside, other sundries (such as water, cockroaches and the like) cannot enter the air inlet pipeline, the air inlet pipeline is prevented from being blocked, and the condition that the external air is conveyed to the cavity space in the cooking process is not influenced. On the other hand, an intake gap is formed between the stopper member and the first end of the intake pipe so that the intake pipe can communicate with the cap intake port 121, and the outside air can enter the intake pipe through the cap intake port 121. The stop member may be configured, for example, as a decorative cover that covers the first end of the intake conduit at the outer surface of the cover 120. Specifically, in one embodiment of the present invention, the stop member comprises a steam valve trim cover located on an outer surface of steam valve assembly 190. The steam valve trim cover covers a first end of the intake duct, i.e., an end communicating with the cover intake port 121.

Since the steam outlet 193 is disposed around the lid air inlet 121, the steam from the steam outlet 193 easily forms a small amount of condensed water around the lid air inlet 121. Preferably, the cover body 120 may further include a waterproof member to prevent liquid from flowing into the cover inlet port 121.

In one embodiment of the present invention, the waterproofing member may be configured as a boss located between the cover air inlet 121 and the steam outlet 193. The boss is spaced apart from the vapor outlet 193. Preferably, the boss is higher than the steam outlet 193. In this way, the bosses are blocked between the steam outlets 193 and the cover inlet 121, and since the bosses are higher than the steam outlets 193, the condensate does not pass over the bosses into the cover inlet 121 under the force of gravity.

When the cover body according to the above scheme is used for a cooking appliance, the steam outlet 193 is arranged around the cover air inlet, so that steam discharged through the steam outlet 193 forms a circumferentially continuous or closed steam curtain around and above the cover air inlet 121 to filter air sucked into the cover air inlet 121, and impurities such as oil smoke and dust are prevented from being sucked into the cover air inlet 121, so that oil stains or dirt even blockage left in an air pipeline is avoided, and the influence on the taste of food is also avoided.

In order to further reduce the noise of the automatic gas exchange device 150 during operation, as shown in fig. 14, a damping sleeve 199 is further sleeved outside the automatic gas exchange device 150, and the damping sleeve 199 may be made of a flexible material such as silicone rubber, and the like.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "section," and the like, appearing herein may refer to either a single component or a combination of components. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (16)

1. A cooking appliance, comprising:

a cover (120);

the cooker body (110), the cover body (120) is arranged on the cooker body (110), and when the cover body (120) covers the cooker body (110), a cooking space is formed between the cover body (120) and the cooker body (110); and

an automatic gas exchange device (150), said automatic gas exchange device (150) being provided in said lid (120) or pot body (110), comprising:

an electric drive unit (151);

-a transmission (160) connected to said electric drive unit (151) so as to be driven by the latter in a reciprocating motion;

the air flow generating device (170) is connected with the transmission device (160), the air flow generating device (170) is provided with an accommodating cavity, and the cavity volume of the accommodating cavity is changed under the reciprocating action of the transmission device (160);

an air inlet and outlet valve device (180), the air inlet and outlet valve device (180) being connected to the receiving cavity, the air inlet and outlet valve device (180) comprising:

the first valve body (178), an air inlet channel (184) and an air outlet channel (185) which are communicated with the containing cavity are arranged on the first valve body (178);

a second valve body (179) provided with a valve inlet (181) and a valve outlet (182) corresponding to the inlet channel (184) and the outlet channel (185), respectively, the valve inlet (181) communicating with the outside atmosphere, the valve outlet (182) communicating with the cooking space; and

a check valve film (183) disposed between the first valve body (178) and the second valve body (179), the check valve film (183) including a film body (183a) and an inlet diaphragm (186) and an outlet diaphragm (187) connected to the film body (183a) with a gap therebetween,

the first valve body (178) is provided with a first blocking rib (176), the first blocking rib (176) is spaced from the air inlet diaphragm (186) in the axial direction of the air inlet channel (184), and/or the second valve body (179) is provided with a second blocking rib (177), and the second blocking rib (177) is spaced from the air outlet diaphragm (187) in the axial direction.

2. The cooking appliance according to claim 1, wherein a projection of the first blocking rib (176) on a horizontal plane perpendicular to the axial direction is located at least partially within a projection of the inlet diaphragm (186) on the horizontal plane, and a projection of the second blocking rib (177) on the horizontal plane is located at least partially within a projection of the outlet diaphragm (187) on the horizontal plane.

3. The cooking appliance according to claim 1, wherein the first blocking rib (176) is provided on an inner peripheral wall of the first valve body (178) that surrounds the air inlet passage (184) and extends radially inward from the inner peripheral wall of the air inlet passage (184), and the second blocking rib (177) is provided on an inner peripheral wall of the second valve body that surrounds the valve outlet port (182) and extends radially inward from the inner peripheral wall of the valve outlet port (182).

4. The cooking appliance according to claim 3, wherein the first valve body (178) is provided with two first blocking ribs (176) oppositely arranged in a first direction and/or the second valve body (179) is provided with two second blocking ribs (177) oppositely arranged in a second direction.

5. The cooking appliance according to claim 4, wherein the inlet diaphragm (186) and the membrane body (183a) are connected by two first connecting ribs (186a) disposed opposite to each other in the third direction, and/or the outlet diaphragm (187) and the membrane body (183a) are connected by two second connecting ribs (187a) disposed opposite to each other in the fourth direction.

6. The cooking appliance of claim 5, wherein said first direction is perpendicular to said third direction and/or said second direction is perpendicular to said fourth direction.

7. The cooking appliance according to claim 5, wherein the first connecting rib (186a) and the second connecting rib (187a) have the same width w, the inlet diaphragm (186) and the outlet diaphragm (187) are each configured as a circular diaphragm, the inlet diaphragm (186) has a diameter Φ 2, the outlet diaphragm (187) has a diameter Φ 1, and wherein the minimum distance h5 between the inlet diaphragm and the first blocking rib (176) satisfies: 0.4 (phi 2-0.5w) ≦ h5 ≦ 0.9 (phi 2-0.5w), and/or a minimum distance h6 between the vent membrane (187) and the second barrier rib (177) satisfies: h6 is more than or equal to 0.4 (phi 1-0.5w) and less than or equal to 0.9 (phi 1-0.5 w).

8. The cooking appliance according to claim 3, wherein the inlet diaphragm (186) and the outlet diaphragm (187) are each configured as circular diaphragms, the diameter of the inlet diaphragm (186) is Φ 2, the diameter of the outlet diaphragm (187) is Φ 1, and the minimum radial distance L3 between the center of the inlet diaphragm and the first blocking rib (176) satisfies: l3 is less than or equal to 0.5 phi 2, and/or the minimum radial distance L4 between the circle center of the air outlet diaphragm (187) and the second blocking rib (177) meets the following conditions: l4 is less than or equal to 0.5 phi 1.

9. The cooking appliance according to claim 1, wherein a first support portion is provided on the first valve body (178) at a position corresponding to the outlet diaphragm (187), the first support portion abutting against the outlet diaphragm (187), and a second support portion is provided on the second valve body (179) at a position corresponding to the inlet diaphragm (186), the second support portion abutting against the inlet diaphragm (186).

10. The cooking appliance according to claim 1, wherein a valve piece groove (178a) in which the check valve film (183) is fitted is provided on the first valve body (178).

11. The cooking appliance according to claim 9, wherein the first support is configured as a first collar (188) projecting towards the air outlet diaphragm (187), the first collar being arranged around the air outlet passage (185), and the second support is configured as a second collar (189) projecting towards the air inlet diaphragm (186), the second collar being arranged around the valve air inlet (181).

12. The cooking appliance according to claim 1, wherein the receiving cavity is configured as a flexible cavity (171), and the side wall of the flexible cavity (171) is a corrugated structure comprising at least one wave-peak configuration.

13. The cooking appliance of claim 12 wherein said corrugated structure includes n wave peak configurations, wherein 2 ≦ n ≦ 8.

14. The cooking appliance according to claim 1, wherein the cover (120) is provided with a steam channel (191) communicating the cooking space with the outside of the cooking appliance, the steam channel (191) communicating with the outside of the cooking appliance (100) through a steam outlet (193) provided on the cover (120);

the cover body (120) is also provided with a cover air inlet (121), the cover air inlet (121) is communicated with the valve air inlet (181), and the position of the steam outlet (193) on the cover body (120) is positioned at the outer peripheral side of the cover air inlet (121).

15. The cooking appliance according to claim 1, wherein the transmission means (160) comprises an eccentric (161) and an eccentric connecting rod (162) connected to the eccentric (161), the eccentric (161) being connected to the electric drive unit (151), the electric drive unit (151) being capable of driving the eccentric (161) and the eccentric connecting rod (162) in rotation, the eccentric connecting rod (162) being connected to the air flow generating means (170).

16. The cooking appliance according to claim 15, wherein the air flow generating means (170) comprises a closed end (172) and an air guide end (173) at both ends of the receiving chamber, respectively, the eccentric link (162) is connected to the closed end (172), and the air inlet and outlet valve means (180) is connected to the air guide end (173).

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