CN217185668U - Cooking utensil - Google Patents

Abstract

The utility model provides a cooking utensil, including lid, a kind of deep pot body and electronic gas exchange device. The electric gas exchange device is arranged in the cover body or the cooker body and comprises an electric drive unit, a transmission device, an airflow generating device and an air inlet and outlet valve device. The transmission is connected to the electric drive unit so as to be driven in a reciprocating motion by the latter. The airflow generating device is connected with the transmission device and is provided with a flexible cavity, the flexible cavity is switched between a squeezed state and a restored state under the reciprocating motion effect of the transmission device, and the side wall of the flexible cavity is of a corrugated structure. The air inlet and outlet valve device is connected with the flexible cavity and 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. According to the utility model discloses a cooking utensil can provide gas exchange for the culinary art space to can prevent that the hot water in the culinary art space from punching the overflow.

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.

Therefore, there is a need for a cooking appliance that at least partially solves the problems of the prior art.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, 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 pivotally connected to 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

an electric gas exchange device disposed in the lid or the pot body, comprising:

an electric drive unit;

a transmission device connected with the electric drive unit so as to be driven by the latter to reciprocate; the air flow generating device is connected with the transmission device and is provided with a flexible cavity, the flexible cavity is switched between a squeezed state and a restored state under the action of the reciprocating motion of the transmission device, and the side wall of the flexible cavity is constructed into a corrugated structure;

and the air inlet and outlet valve device is connected with the flexible cavity and 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.

During cooking, the electrically powered gas exchange device is capable of drawing gas in through the valve inlet and delivering gas into the cooking volume through the valve outlet when food in the cooking volume is in a boiling stage. 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. In addition, in the scheme, the airflow generating device can realize the pressure and speed change of the airflow through the compression and the stretching of the flexible cavity with a certain volume, and can realize the automatic control of the airflow by combining the electric driving unit, the air inlet and outlet valve device and the like, thereby providing a gas exchange function for the cooking space. In addition, the scheme enables the flexible cavity to be compressed and stretched more easily and not to be easily broken through constructing the side wall of the flexible cavity into a corrugated structure, and the fatigue life is reliable. The scheme can realize large air flow, and has low working noise and low cost.

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

Optionally, the corrugated structure comprises n peak configurations, wherein 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, the transmission has an eccentric structure having an eccentricity, and the corrugated structure comprises a plurality of wave peak configurations, wherein a minimum spacing between two adjacent wave peaks is greater than the eccentricity. Because the compression degree of the flexible cavity is related to the eccentricity of the eccentric structure, the scheme can avoid friction between adjacent corrugations when the flexible cavity is compressed by enabling the eccentricity of the eccentric structure to be smaller than the minimum distance between two adjacent wave crests, thereby avoiding the generation of friction noise.

Optionally, the width L1 of an individual wave trough in the corrugated structure in the axial direction of the flexible cavity satisfies: l1 is more than or equal to 1mm and less than or equal to 2mm, and/or the minimum distance L2 between two adjacent wave crests satisfies 3mm and less than or equal to L2 and less than or equal to 4 mm. According to the scheme, the width of the single wave trough is set in the range, the contact area of two adjacent waves can be reduced, the adjacent wave troughs can be prevented from contacting while two adjacent wave crests are in maximum contact, the friction between the adjacent waves can be reduced, the service life of the adjacent waves can be prolonged, and the noise generated by the friction between the adjacent waves can be reduced. Further, by setting the minimum pitch between adjacent two peaks within the above range, the amount of air flow can be increased.

Optionally, the wall thickness h1 of the main body portion of the flexible chamber satisfies: h1 is more than or equal to 0.2mm and less than or equal to 1.2 mm. This scheme is through setting up the wall thickness in above-mentioned within range with flexible chamber, can prolong the fatigue life in this flexible chamber under the prerequisite of the elastic compression power of guaranteeing flexible chamber, avoids it to appear warping, influences the air flow.

Optionally, 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. This solution enables the electric gas exchange device to achieve a larger gas flow rate by making the diameter D of the wave trough configuration larger than 5mm, and in addition, by making the diameter D of the wave crest configuration smaller than 50mm, the structure of the flexible chamber can be made more compact, so as to be placed more easily in the cooking appliance, and so as to make the structure of the cooking appliance smaller and more compact.

Optionally, a steam channel 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 steam outlet is annular; or the steam outlet comprises a plurality of sub-steam outlets spaced around the lid air inlet.

Optionally, the lid air inlet communicates with the valve air inlet through an air inlet duct, the lid air inlet is disposed at a first end of the air inlet duct, the cooking appliance further comprises a stopper member covering the first end of the air inlet duct and forming an air inlet gap with the first end of the air inlet duct. The scheme can further ensure that other impurities cannot enter the air inlet pipeline together with the outside air, and avoids the blockage of the air inlet pipeline.

Optionally, the cooking appliance further comprises a water-proof structure disposed at least partially between the steam outlet and the lid air inlet to prevent liquid from entering the lid air inlet.

Optionally, the waterproof structure is a boss, and the boss is higher than the steam outlet.

In this way, condensate will not pass over the boss into the cover air inlet under the influence of gravity.

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 flexible 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.

Optionally, the air valve inlet and outlet device includes a first check valve, a second check valve, and a check valve film disposed between the first check valve and the second check valve, the valve air inlet and the valve air outlet are disposed on the second check valve respectively, an air inlet channel and an air outlet channel corresponding to the valve air inlet and the valve air outlet are disposed on the first check valve respectively, the check valve film includes two flexible diaphragms corresponding to the valve air inlet and the valve air outlet respectively, and the flexible diaphragms can realize elastic deformation along with the air flow direction. The scheme is convenient to assemble, easy to realize and low in cost.

Optionally, the flexible diaphragm is connected to the one-way valve membrane through a connecting rib, and a through opening is formed between the flexible diaphragm and the one-way valve membrane. The scheme is convenient to assemble, easy to realize and low in cost.

Optionally, a first check ring is arranged at a position of the first check valve corresponding to the valve air outlet, a second check ring is arranged at a position of the second check valve corresponding to the valve air inlet, and the first check ring and the second check ring respectively protrude towards the corresponding flexible diaphragm and abut against the flexible diaphragm. The scheme can conveniently realize the one-way inlet and outlet of gas.

Optionally, the electrically powered gas exchange device is generally horizontally recumbent in the cover. In this way, the space in the cover can be more fully utilized, making the structure of the cover more compact.

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 part of a cooking appliance according to an embodiment of the invention;

FIG. 2 is a schematic top view 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 cross-sectional view of the cover shown in FIG. 2 taken along the direction A-B-C;

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

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

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

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

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

fig. 9 is a schematic view of a portion of a cover of a cooking appliance according to an embodiment of the present invention;

fig. 10 is a perspective view of an electric gas exchange device of the cooking appliance shown in fig. 1, in which a damping sleeve is provided outside the electric gas exchange device.

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, 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 following detailed description of the preferred embodiments of the invention, however, is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

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 be in 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 the 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 cover 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 cover 120 is provided to 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 cover 120 may be pivotably disposed above the pot body 110 between the maximum open position and the closed position by, for example, hinging. 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 covered on 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 boundary between the food storage space 141 and the cavity space 142, and the sizes of the two spaces may change according to the specific change of the volume of the food material.

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

As shown in fig. 1, the cover 120 is provided with a cover inlet 121. One end of the lid air inlet 121 communicates with the outside, and the other end communicates with an electric gas exchange device 150 (as shown in fig. 2, more specifically, an air inlet end of the electric gas exchange device 150) provided in the pot body 110 or the lid 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 electric gas exchange device 150.

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

The cooking appliance 100 further includes an electric gas exchange device 150, and the electric 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 electrically powered gas exchange device 150 is disposed in the cover 120.

The electrically powered gas exchange device 150 may be disposed at any suitable location on the cooking appliance 100. In a preferred embodiment of the present invention, as shown in fig. 1-4, an electric 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 electrically powered gas exchange device 150 be substantially horizontally reclined in the cover 120 to reduce the size of the cover 120 in the vertical direction.

As shown in fig. 5, the electric 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 having an output shaft 151 a. The transmission device 160 is connected to the electric driving unit 151, and the transmission device 160 has an eccentric structure, so that the electric driving unit 151 can drive the transmission device 160 to perform an eccentric rotary reciprocating motion with a certain eccentricity c. The airflow generating device 170 has 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 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 can 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 connecting rod 162 connected to the eccentric 161 via an eccentric shaft 161a, the eccentric 161 is connected to an output shaft 151a of the electric driving unit 151, the electric driving unit 151 can drive the eccentric 161 to rotate, the eccentric 161 can drive the eccentric connecting rod 162 to rotate, and the eccentric connecting rod 162 is connected to the flexible chamber 171. It should be noted that the "eccentricity" mentioned above refers to a distance that the force-receiving center of the transmission 160 deviates from the central axis of the output shaft 151a, that is, a distance c between the central axis of the eccentric wheel shaft 161a and the central axis of the output shaft 151a shown in fig. 5. 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 into reciprocating compression and tension when the eccentric link 162 rotates. The corrugated structure comprises at least one peak structure, and preferably, the corrugated structure comprises a plurality of peak structures, wherein the number n of peak structures satisfies: n is more than or equal to 2 and less than or equal to 8. Illustratively, the corrugated structure may include 3, 4 or 6 wave peak configurations, which can be set by one skilled in the art according to actual needs. 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.

Since the degree of compression of the compliance cavity 171 is related to the eccentricity of the eccentric configuration, in order to reduce the area where two adjacent waves of the compliance cavity 171 contact during the reciprocating motion, thereby reducing friction and noise, it is preferable that the minimum distance L2 between two adjacent peaks be greater than the eccentricity c. This arrangement prevents friction between adjacent corrugations when the flexible chamber 171 is compressed, thereby preventing frictional noise. Further preferably, as shown in fig. 7, the width L1 of the single wave trough in the corrugated structure in the axial direction of the flexible cavity 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 contact area of the adjacent two corrugations and can ensure that the adjacent two crests do not contact the adjacent troughs while contacting at the maximum by setting the width of the single trough in the axial direction of the flexible chamber 171 and the minimum distance between the adjacent two crests within the above-mentioned ranges, so that the friction between the adjacent corrugations can be reduced, the service life thereof can be prolonged, and the scheme can further 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.

Preferably, the wall thickness h1 of the main body portion of the flexible chamber 171 satisfies: 0.2mm h1 1.2mm, wherein the main portion of the flexible chamber 171 is the corrugated structure of the middle section of the flexible chamber 171 and does not include the closed end 172 and the air guide end 173. Illustratively, the wall thickness h1 of the main body portion of the flexible cavity 171 may be set to 0.5mm, 0.8mm, 1mm, etc., which may 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 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 electric gas exchange device 150 achieve an air flow rate greater than 2L per minute, and moreover, 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 cooking appliance 100, and to make the structure of the cooking appliance 100 smaller and more compact.

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

Be provided with respectively the diaphragm 186 and the diaphragm 187 of giving vent to anger that correspond with valve air inlet 181 and valve air outlet 182 on the check valve membrane 183, the diaphragm 186 that admits air is flexible with the diaphragm 187 of giving vent to anger, and two flexible diaphragms pass through the splice bar and connect on check valve membrane 183, and have the through-hole between flexible diaphragm and the check valve membrane 183. Preferably, as shown in fig. 8, the portion of check valve film 183 where inlet diaphragm 186 and outlet diaphragm 187 are provided is thinner than the other portion of check valve film 183. In one embodiment, this is accomplished by providing a recess in the check valve membrane 183. Specifically, the recess at inlet diaphragm 186 opens toward first check valve 178, and the recess at outlet diaphragm 187 opens toward second check valve 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.

Further, in order to realize one-way passage of gas, the first one-way valve 178 is provided with a first retainer ring 188 at a position corresponding to the valve outlet 182, and the first retainer ring 188 protrudes toward the outlet diaphragm 187 and abuts on the outlet diaphragm 187. A second stopper 189 is provided at a position of the second check valve 179 corresponding to the valve inlet 181, and the second stopper 189 protrudes toward the intake diaphragm 186 and abuts on the intake diaphragm 186.

When ambient air flows from the valve inlet 181 into the flexible chamber 171, the air flow will bend the inlet diaphragm 186 so that it can enter the flexible chamber 171 through the inlet passage 184. At this time, the air flow also enters the valve outlet 182C, 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 airflow in the flexible cavity 171 enters the cooking space through the valve outlet 182, the outlet diaphragm 187 is bent by the airflow and flows out through the valve outlet 182, and meanwhile, the airflow in the flexible cavity 171 also passes through the inlet channel 184, but the inlet diaphragm 186 is blocked by the second baffle 189 and cannot be bent, so that the airflow cannot pass through. The purpose of single channel one-way passing can be achieved through the mode.

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 flexible chamber 171 is compressed, the chamber volume decreases and the pressure of the air inside the chamber is greater than the pressure outside the chamber, forcing the air out through the outlet passageway and valve outlet. When the flexible chamber 171 is stretched, the chamber volume increases, the air pressure inside the chamber is small, and the air of the external large pressure enters the inside of the flexible chamber 171 through the valve inlet 181 and the inlet passage 184. The compression and extension of the flexible chamber 171 is accomplished in a cycle of motion, such that there is a continuous flow of gas out of the valve outlet 182 into the chamber volume 142. Generally, there is a temperature difference between the delivered gas and the foam in the chamber space 142, so that the delivered gas can liquefy and contract the vapor in the foam to break 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 9, 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 delivered from the electrical gas exchange device 150 can liquefy and contract the vapor in the foam accumulated in the cavity space 142 and break the foam after entering the cavity 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. 9, the vapor outlet 193 is disposed around the lid air inlet 121. I.e., the steam outlet 193 is disposed 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, as described above, the electric gas exchange device 150 also starts operating to suck gas from the lid gas inlet 121 and to deliver the sucked gas into the cavity space 142 through the lid gas outlet 152. Since 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 gas sucked into the cover inlet 121, thereby preventing impurities such as oil smoke, dust and the like 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 avoiding affecting the taste of the food.

Specifically, in one embodiment of the present invention, as shown in fig. 9, 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 shapes of the plurality of sub-steam outlets may be the same or different.

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 cover 120 further includes a stopper member (not shown). The stopper member covers a first end of the intake pipe, i.e., an end communicating with the cover 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 cap 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 lid air inlet 121, and since the bosses are higher than the steam outlets 193, the condensate does not pass over the bosses into the lid air 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 electric gas exchange device 150 during operation, as shown in fig. 10, a damping sleeve 199 is further sleeved outside the electric 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 present invention is defined by the appended claims and their equivalents.

Claims (18)

1. A cooking appliance, comprising:

a cover (120);

the cooker body (110), the cover body (120) can be pivotally connected to 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 electrically powered gas exchange device (150), the electrically powered gas exchange device (150) disposed in the lid (120) or the boiler 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 a flexible cavity (171), under the reciprocating action of the transmission device (160), the flexible cavity (171) is switched between a squeezed state and a reset state, and the side wall of the flexible cavity (171) is constructed into a corrugated structure;

an air inlet and outlet valve device (180), the air inlet and outlet valve device (180) being connected to the flexible chamber (171), the air inlet and outlet valve device (180) having a valve air inlet (181) and a valve air outlet (182), the valve air inlet (181) being in communication with the outside atmosphere and the valve air outlet (182) being in communication with the cooking space.

2. The cooking appliance according to claim 1, wherein the side wall of the flexible chamber (171) is a corrugated structure comprising at least one wave-crest configuration.

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

4. The cooking appliance of claim 2 wherein said transmission has an eccentric configuration having an eccentricity, said corrugated configuration comprising a plurality of wave peak configurations wherein the minimum spacing between adjacent wave peaks is greater than said eccentricity.

5. The cooking appliance according to any of the claims 1 to 4, wherein 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/or the minimum distance L2 between two adjacent wave crests satisfies 3mm and less than or equal to L2 and less than or equal to 4 mm.

6. The cooking appliance according to claim 1, wherein the wall thickness h1 of the main portion of the flexible chamber (171) is such that: h1 is more than or equal to 0.2mm and less than or equal to 1.2 mm.

7. The cooking appliance according to claim 1, wherein the relationship between the diameter D of the crest formation and the diameter D of the trough formation of the corrugated structure is such that: d is more than or equal to 5mm and less than or equal to D and less than or equal to 50 mm.

8. 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).

9. The cooking appliance according to claim 8, wherein the steam outlet (193) is annular; or the steam outlet (193) comprises a plurality of sub-steam outlets spaced around the lid air inlet (121).

10. The cooking appliance according to claim 8, wherein the lid inlet opening (121) communicates with the valve inlet opening (181) through an inlet duct, the lid inlet opening (121) being provided at a first end of the inlet duct, the cooking appliance further comprising a stop member covering the first end of the inlet duct and forming an inlet gap with the first end of the inlet duct.

11. The cooking appliance according to claim 8, further comprising a waterproof structure disposed at least partially between the steam outlet (193) and the lid air inlet (121) to prevent liquid from entering the lid air inlet (121).

12. The cooking appliance of claim 11 wherein said water resistant structure is a boss, said boss being higher than said steam outlet.

13. 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).

14. The cooking appliance according to claim 13, wherein the air flow generating means (170) comprises a closed end (172) and an air guide end (173) at both ends of the flexible chamber (171), respectively, the eccentric link (162) being connected to the closed end (172), and the air inlet and outlet valve means (180) being connected to the air guide end (173).

15. The cooking appliance according to claim 1, wherein the air inlet and outlet valve device (180) comprises a first check valve (178), a second check valve (179) and a check valve film (183) disposed between the first check valve (178) and the second check valve (179), the valve air inlet (181) and the valve air outlet (182) are respectively disposed on the second check valve (179), an air inlet channel (184) and an air outlet channel (185) corresponding to the valve air inlet (181) and the valve air outlet (182) respectively are disposed on the first check valve (178), and the check valve film (183) comprises two flexible diaphragms corresponding to the valve air inlet (181) and the valve air outlet (182) respectively, and the flexible diaphragms are capable of elastically deforming along with the air flow direction.

16. The cooking appliance according to claim 15, wherein the flexible membrane is connected to the one-way valve membrane (183) by a connecting rib, and a through port is provided between the flexible membrane and the one-way valve membrane (183).

17. The cooking appliance according to claim 15, wherein the first check valve (178) is provided with a first retaining ring (188) at a position corresponding to the valve outlet (182), the second check valve (179) is provided with a second retaining ring (189) at a position corresponding to the valve inlet (181), and the first retaining ring (188) and the second retaining ring (189) respectively protrude toward and abut against the corresponding flexible membrane.

18. The cooking appliance according to claim 1, wherein the electrically operated gas exchange device (150) is lying substantially horizontally in the lid (120).

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