CN116195891A - Cooking utensil - Google Patents

Abstract

The invention provides a cooking utensil which comprises a cover body, a cooker body and an electric gas exchange device. The cover body is arranged on the cooker body in an openable and closable manner, and when the cover body is covered on the cooker body, a cooking space is formed between the cover body and the cooker body. The electric gas exchange device is arranged in the cover body or the pot body and comprises an electric driving unit, a transmission device, an air flow generating device and an air inlet and outlet valve device. The transmission is connected to 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, and the flexible cavity is switched between a pressed state and a restored state under the reciprocating motion of the transmission device. 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. The cooking utensil can provide gas exchange for the cooking space, so that soup in the cooking space can be prevented from overflowing upwards.

Description

Cooking utensil

Technical Field

The invention relates to the technical field of household appliances, in particular to a cooking appliance.

Background

In order to increase the cooking rate, the known cooking appliance (such as an electric cooker) generally has a large heating power, but in the actual use process, when the food material is heated and boiled by continuous high-heat power, a large amount of foam is generated, so that the problem of pot overflow is caused.

Therefore, there is a need to propose a cooking appliance to at least partially solve the problems existing in the prior art.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The invention provides a cooking appliance. The cooking appliance includes:

a cover body;

the cover body is arranged on the cooker body in an openable and closable manner, and when the cover body is covered on 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 cover or the pot, comprising:

an electric drive unit;

a transmission device connected with the electric driving unit so as to be driven by the electric driving unit to do reciprocating motion; 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 pressed state and a restored state under the reciprocating motion action of the transmission device,

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, when food in the cooking space is in a boiling phase, the electric gas exchange device is capable of sucking gas through the valve gas inlet and delivering the gas into the cooking space through the valve gas outlet. The temperature difference between the conveyed gas and the foam in the cooking space is usually present, so that the conveyed gas can liquefy and shrink the steam in the foam to be broken after entering the cooking space to contact the foam accumulated in the cooking space, so as to prevent the steam from overflowing. The overflow can be avoided even in the case of high-fire quick cooking. In addition, in the scheme, the air flow generating device can realize pressure and speed change of air flow through compression and stretching of a flexible cavity with a certain volume, and can realize automatic control of the air flow by combining an electric driving unit, an air inlet and outlet valve device and the like, so that an air exchange function is provided for a cooking space. The scheme has the advantages of large air flow, low working noise and low cost.

Optionally, the side wall of the flexible cavity is a corrugated structure comprising at least one peak configuration. According to the scheme, the side wall of the flexible cavity is constructed into the corrugated structure, so that the flexible cavity can be compressed and stretched more easily, and is not easy to break, and the fatigue life is reliable.

Optionally, the corrugated structure includes n peak configurations, where 2 n is less than or equal to 8. The scheme can make the structure of the flexible cavity more compact under the condition of realizing atmospheric flow.

Optionally, the width L1 of the individual valleys in the corrugated structure along the axial direction of the flexible cavity satisfies: l1 is less 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 less than or equal to L2 is less than or equal to 4mm. By setting the width of a single wave trough in the above range, the contact area of two adjacent waves can be reduced, and the adjacent wave troughs can not be contacted while the adjacent wave crests are contacted to the maximum extent, therefore, friction between adjacent waves can be reduced, the service life of the corrugated board is prolonged, and noise generated by friction between the adjacent waves can be reduced by the scheme. Further, by setting the minimum distance between two adjacent peaks within the above-described range, the air flow rate can be increased.

Optionally, the wall thickness h1 of the main body portion of the flexible cavity satisfies: h1 is more than or equal to 0.2mm and less than or equal to 1.2mm. According to the scheme, the wall thickness of the flexible cavity is set in the range, so that the fatigue life of the flexible cavity can be prolonged on the premise of guaranteeing the elastic compression force of the flexible cavity, and the deformation of the flexible cavity is avoided, so that the air flow is influenced.

Optionally, the relationship between the diameter D of the peak 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 50mm. According to the scheme, the diameter D of the wave trough structure is larger than 5mm, so that the electric gas exchange device can achieve larger gas flow, in addition, the structure of the flexible cavity can be more compact by enabling the diameter D of the wave crest structure to be smaller than 50mm, and therefore the flexible cavity is easier to place in a cooking appliance, and the structure of the cooking appliance can be smaller and more compact.

Optionally, the side wall of the flexible cavity is configured as a cylindrical structure or a spherical structure. The scheme makes the cavity volume of flexible chamber great to the air current flow is great.

Optionally, a steam channel which is communicated with the cooking space and 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 periphery side of the cover air inlet.

In this scheme, because steam outlet sets up around the lid air inlet, consequently, via steam outlet exhaust steam can form around the lid air inlet and the top in circumference or confined steam curtain to filter the gas that inhales the lid air inlet, avoided debris such as oil smoke, dust to inhale in the lid air inlet, thereby avoided leaving greasy dirt or dirt even blocking in the gas line, 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 cover air inlet.

Optionally, the cover air inlet is communicated with the valve air inlet through an air inlet pipeline, the cover air inlet is arranged at a first end of the air inlet pipeline, the cooking utensil further comprises a stop member, and an air inlet gap is formed between the stop member and the first end of the air inlet pipeline and covers the first end of the air inlet pipeline. The scheme can further ensure that other sundries cannot enter the air inlet pipeline together with the external air, and the air inlet pipeline is prevented from being blocked.

Optionally, the cooking appliance further comprises a waterproof 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 force 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 generating device. The scheme is convenient to assemble and easy to realize.

Optionally, the airflow generating device comprises a closed end and an air guide end which are respectively positioned at two ends of the flexible cavity, the eccentric connecting rod 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 inlet and outlet valve device comprises a first one-way valve, a second one-way valve and a one-way valve film arranged between the first one-way valve and the second one-way valve, the valve air inlet and the valve air outlet are respectively arranged on the second one-way valve, the first one-way valve is provided with an air inlet channel and an air outlet channel which respectively correspond to the valve air inlet and the valve air outlet, the one-way valve film comprises two flexible films respectively corresponding to the valve air inlet and the valve air outlet, and the flexible films 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 membrane is connected to the one-way valve membrane through a connecting rib, and a through hole is formed between the flexible membrane 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 membrane and are abutted to the flexible membrane. The scheme can conveniently realize one-way gas inlet and outlet.

Optionally, the electrically powered gas exchange device is lying generally horizontally 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 are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and their description to explain the principles and apparatus of the invention. In the drawings of which there are shown,

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 a cover of the cooking appliance shown in fig. 1, wherein a face cover is omitted to clearly show the structure of the inside of the cover;

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

FIG. 4 is a schematic cross-sectional view of the cover shown in FIG. 2 taken along the M-N-C direction, wherein a portion of the cover structure is 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 view of an assembly of the electric drive unit, transmission and gas flow generating device of the electric gas exchange device shown in FIG. 5;

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

FIG. 8 is a schematic cross-sectional view of an air inlet and outlet valve assembly of the electrically operated 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 schematic cross-sectional view of a gas flow generating device of an electrically powered gas exchange device according to another embodiment of the invention;

FIG. 11 is a schematic cross-sectional view of a gas flow generating device of an electrically powered gas exchange device according to yet another embodiment of the invention; and

fig. 12 is a perspective view of an electric gas exchange device of the cooking appliance shown in fig. 1, wherein a vibration damping sleeve is provided at the outside of 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 invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.

In the following description, a detailed structure will be presented for the purpose of thoroughly understanding the present invention. It will be apparent that the invention is not limited to the specific details set forth in the skilled artisan. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions, and should not be construed as limited to the embodiments set forth herein.

The invention provides a cooking appliance. The cooking appliance may be an electric rice cooker, an electric pressure cooker or other electric heating appliance. In addition, the cooking appliance can have other functions of cooking porridge, soup and the like besides the function of cooking rice.

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

An inner pot heating means (not shown) for heating the inner pot 130 is also 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 or an induction heating device such as an electromagnetic coil.

As shown in fig. 1, a cover 120 is provided on the pot 110. The shape of the cover 120 substantially corresponds to the shape of the pot 110. For example, the cover 120 may have a rounded rectangular parallelepiped shape. The cover 120 includes an inner cover 123, and the inner cover 123 may be a detachable inner cover so as to facilitate the detachment of the inner cover 123 for cleaning. The cover 120 is openably and closably provided on the cooker body 110 for covering the entire top of the cooker body 110 or at least the inner pot 130 of the cooker body 110. Specifically, in the present embodiment, the cover 120 may be pivotably disposed above the pot 110 between a maximum open position and a closed position by, for example, a hinge. The hinge position of the cover 120 and the pot 110 is generally located at the rear end of the cooking appliance 100 so that a user can operate at the front end of the cooking appliance 100. It should be noted that, the terms "front" and "rear" herein are based on 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 in which 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 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 holding space 141 and the cavity space 142, and the volume sizes of both will vary according to the specific change of the food material volume.

The directional terms and positional terms used herein in describing the respective components and their positional relationship in the cover 120, such as "above", "below", "upper side", "lower side", "upward", "downward", "above", "below", "high", "low", "horizontal distance", and the like, are with respect to the cover 120 in the closed position.

As shown in fig. 1, a cover air inlet 121 is provided on the cover 120. One end of the cover air inlet 121 communicates with the outside, and the other end communicates with an electric air exchanging device 150 (shown in fig. 2, more specifically, an air inlet end of the electric air exchanging device 150) provided in the pot body 110 or the cover body 120, which will be described in detail below, to deliver outside air (e.g., cool air) to the cooking space 140 (more specifically, the cavity space 142) through the electric air exchanging 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 exchanging device 150, and the electric gas exchanging device 150 is used to suck air (e.g., external cool air) outside the cooking appliance 100 into the cavity space 142. Preferably, the electric gas exchange device 150 is disposed in the cover 120.

The electrically powered gas exchange device 150 may be disposed in any suitable location of the cooking appliance 100. In a preferred embodiment of the present invention, as shown in fig. 1 to 4, an electric gas exchanging apparatus 150 is provided in the cover 120 so as to communicate with the cover gas inlet 121 provided in the cover 120 through a gas inlet line. Further preferably, the electric gas exchange device 150 is generally horizontally recumbent in the cover 120 to reduce the size of the cover 120 in the vertical direction.

As shown in fig. 5, the electric gas exchanging apparatus 150 includes an electric driving unit 151, a transmission 160, a gas flow generating device 170, and a gas inlet and outlet 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 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 may be switched between a compressed state and a restored state, and when the flexible chamber 171 is switched between the two states, the chamber volume of the flexible chamber 171 may be changed, so that a pressure change may 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 all unidirectional through holes. The valve inlet 181 communicates with the ambient atmosphere such that the ambient atmosphere may enter the flexible chamber 171 via the valve inlet 181. The valve outlet 182 communicates with the cooking space such that the gas in the flexible chamber 171 can enter the cooking space via the valve outlet 182. The structure of the inlet and outlet valve device 180 will be described in detail later.

Specifically, the valve air inlet 181 communicates with the cover air inlet 121 through an air intake pipe (not shown) to allow the outside atmosphere to enter. A first end of the air intake conduit communicates with the cap air intake 121 and a second end of the air intake conduit is connected to the valve air intake 181. The valve outlet 182 communicates with the cover outlet 122 through an outlet line (an outlet route may refer to fig. 4), and the cover outlet 122 may be provided on the inner cover so that the external atmosphere enters the cooking space. The inlet and outlet lines may be made of an elastic material such as silicone.

As shown in fig. 5 and 6, the transmission 160 includes an eccentric wheel 161 and an eccentric link 162 connected to the eccentric wheel 161, the eccentric wheel 161 is connected to the electric driving unit 151, the electric driving unit 151 can drive the eccentric wheel 161 to rotate, the eccentric wheel 161 can drive the eccentric link 162 to rotate, and the eccentric link 162 is connected to the flexible chamber 171. Specifically, the airflow generating device 170 includes a closed end 172 and an air guiding end 173 at both ends of the flexible chamber 171, respectively, 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 guiding end 173.

As shown in fig. 7, the closed end 172 of the flexible chamber 171 has a through hole 174, and 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 driven to reciprocate along the axial direction thereof.

In a preferred embodiment, the side walls of the flexible chamber 171 are configured in a bellows-like structure that can be brought to reciprocally compress and stretch as the eccentric link 162 rotates. The corrugated structure comprises at least one peak structure, and further 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 peak configurations, as may be desired by one skilled in the art. This solution makes it possible to more easily compress and stretch the flexible chamber 171 by configuring the side walls of the flexible chamber 171 in a corrugated structure, and is not easily broken, and the fatigue life is reliable.

In order to reduce the area where adjacent two of the waves of the flexible chamber 171 contact during the reciprocating motion, thereby reducing friction and noise, it is preferable that the width L1 of the single trough in the corrugated structure in the axial direction of the flexible chamber 171, as shown in fig. 7, satisfies: l1 is less than or equal to 1mm and less than or equal to 2mm, and the minimum distance L2 between two adjacent wave peaks satisfies L2 is less than or equal to 3mm and less than or equal to 4mm. The scheme can minimize the area where the adjacent two waves are contacted by setting the width of a single wave trough in the axial direction of the flexible cavity 171 and the minimum distance between the adjacent two wave crests within the above range, and can ensure that the adjacent two wave crests are contacted while the adjacent wave troughs are contacted to the maximum extent, thereby reducing friction between the adjacent waves, improving the service life thereof, and also reducing noise generated by friction between the adjacent waves. In addition, by setting the interval between adjacent two peaks within the above range, the air flow rate can also be ensured. Illustratively, the width L1 of an individual trough along the axial direction of the flexible cavity 171 may be set to 1.5mm, 1.8mm, etc., and the minimum spacing L2 between two adjacent peaks may be set to 3.5mm, 3.6mm, etc., as may be desired by those skilled in the art.

Preferably, the wall thickness h1 of the main body portion of the flexible cavity 171 satisfies: 0.2 mm.ltoreq.h1.ltoreq.1.2 mm, wherein the main body portion of the flexible chamber 171 means a 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. By way of example, the wall thickness h1 of the main body portion of the flexible chamber 171 may be set to 0.5mm, 0.8mm, 1mm, or the like, and may be set as desired by those skilled in the art. By setting the wall thickness of the flexible cavity 171 in the above range, the fatigue life of the flexible cavity 171 can be prolonged and deformation of the flexible cavity 171 can be avoided to influence the air flow under the premise of ensuring the elastic compression force of the flexible cavity 171.

Preferably, the relationship between the diameter D of the peak 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 50mm. The applicant found that by making the diameter D of the trough formation greater than or equal to 5mm, the electric gas exchange device 150 can be made to achieve a gas flow rate of greater than 2L per minute, and furthermore, by making the diameter D of the crest formation less than or equal to 50mm, the structure of the flexible chamber 171 can be made more compact, so as to be more easily placed in the cooking appliance 100, and the structure of the cooking appliance 100 can be made smaller and more compact.

The gas inlet and outlet valve means 180 may enable 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 chamber 171, and the first check valve 178 is provided with an air inlet channel 184 and an air outlet channel 185, and the air inlet channel 184 and the air outlet channel 185 correspond to the valve air inlet 181 and the valve air outlet 182, respectively, and the valve air inlet 181 and the valve air outlet 182 are disposed on the second check valve 179, respectively.

The check valve film 183 is provided with an air inlet film 186 and an air outlet film 187 corresponding to the valve air inlet 181 and the valve air outlet 182 respectively, the air inlet film 186 and the air outlet film 187 are flexible, the two flexible films are connected to the check valve film 183 through connecting ribs, and a through hole is formed between the flexible films and the check valve film 183. Preferably, as shown in fig. 8, the portion of the check valve film 183 where the inlet diaphragm 186 and the outlet diaphragm 187 are disposed is thinner than the thickness of the other portion of the check valve film 183. In one embodiment, this is achieved by providing a recess in the check valve membrane 183. Specifically, the opening of the recess at the inlet diaphragm 186 is toward the first one-way valve 178 and the opening of the recess at the outlet diaphragm 187 is toward the second one-way valve 179. This arrangement allows the inlet and outlet diaphragms 186, 187 to deform more easily during inlet and outlet air, thereby facilitating the passage of air.

Further, in order to realize unidirectional passage of the gas, a first check ring 188 is disposed at a position of the first check valve 178 corresponding to the valve gas outlet 182, and the first check ring 188 protrudes toward the gas outlet membrane 187 and abuts against the gas outlet membrane 187. The second check valve 179 is provided with a second retainer 189 at a position corresponding to the valve intake port 181, the second retainer 189 protruding toward the intake diaphragm 186 and abutting against 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 channel 184. At this time, the air flow enters the valve air outlet 182, but the air flow cannot pass through the air outlet diaphragm 187 because the air outlet diaphragm is blocked by the first retainer 188 and cannot be bent; similarly, when the air flow in the flexible cavity 171 enters the cooking space through the valve air outlet 182, the air outlet diaphragm 187 is bent by the air flow and flows out through the valve air outlet 182, and the air flow in the flexible cavity 171 also passes through the air inlet channel 184, but the air inlet diaphragm 186 cannot be bent due to being blocked by the second retainer 189, so that the air flow cannot pass through. The purpose of unidirectional passage of a single channel can be achieved in the above manner.

During cooking, before the temperature of the food cooked in the inner pot is boiled critically or boiled for a while overflows or when the temperature in the inner pot reaches a set value, viscous substances such as starch and the like in the food are precipitated into water, and the steam is wrapped to form a large amount of bubbles, which are accumulated in the cavity space 142 above the food storage space 141 in a large amount. At this time, the electric driving unit 151 may be controlled to drive the driving device 160 to reciprocate, thereby performing compression and extension actions on the flexible chamber 171. When the flexible chamber 171 is compressed, the chamber volume decreases and the air pressure inside the chamber is greater than the pressure outside the chamber forcing air out through the air outlet channel and the valve outlet. When the flexible chamber 171 is stretched, the chamber volume increases, the air pressure in the chamber is small, and the air of the external large pressure enters the inside of the flexible chamber 171 through the valve air inlet 181 and the air inlet passage 184. The completion of the compression and extension of flexible chamber 171 corresponds to the completion of a cyclical motion such that the cyclical motion continues to circulate and valve outlet 182 provides a continuous flow of gas to chamber space 142. In general, the supplied gas has a temperature difference between the heat and the cold of the foam in the cavity space 142, so that the supplied gas can liquefy and shrink the steam in the foam to be broken after entering the cavity space 142 to contact the foam accumulated in the cavity space 142, thereby preventing the overflow. The overflow can be avoided even in the case of high-fire quick cooking.

As shown in fig. 1, 3 and 9, the cover 120 is further provided with a steam valve assembly 190, the steam valve assembly 190 includes a steam channel 191, a steam inlet 192 and a steam outlet 193, which communicate the cooking space with the outside of the cooking appliance, and the steam outlet 193 may be provided on a decorative cover of the cover 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 electric gas exchange device 150, after entering the cavity space 142, can liquefy and shrink the steam in the foam accumulated in the cavity space 142, and break the foam. After the supplied gas is impacted against the foam, it can be discharged to the outside together with or in the form of steam via the steam inlet 192, the steam passage 191 and the steam outlet 193, taking away a part of heat, so that the generation of the foam can be suppressed, and the pressure can be reduced to further prevent the overflow.

In a preferred embodiment, as shown in fig. 9, the steam outlet 193 is disposed around the cover air inlet 121. I.e. the steam outlet 193 is provided around the cover air inlet 121. During 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 is discharged through the steam inlet 192, the steam passage 191, and the steam outlet 193. Meanwhile, as described above, the electric gas exchange device 150 also starts to operate to suck gas from the cover gas inlet 121 and deliver the sucked gas into the cavity space 142 through the cover gas outlet 152. Since the steam outlet 193 is disposed around the cover air inlet 121, the steam discharged through the steam outlet 193 forms a steam curtain which is continuous or closed in the circumferential direction around and above the cover air inlet 121 to filter the air sucked into the cover air inlet 121, and impurities such as oil smoke, dust and the like are prevented from being sucked into the cover air inlet 121, thereby preventing greasy dirt or dirt from being left in the air pipeline and even blocking, and preventing the taste of food from being affected.

Specifically, in one embodiment of the present invention, as shown in fig. 9, the steam outlet 193 is disposed around the cover air inlet 121. The steam outlet 193 includes a plurality (e.g., 2, 3, or more) of sub-steam outlets disposed at intervals along the circumferential direction thereof. The plurality of sub-steam outlets may be equidistantly spaced or may be non-equidistantly spaced. The sub-steam outlets may be of any suitable shape, such as arcuate, circular, rectangular, etc. The shape of the plurality of sub steam outlets may be the same or different.

In another embodiment of the present invention, not shown, the steam outlet 193 is configured in a ring shape closed in the circumferential direction, which surrounds the cover air inlet 121. It should be noted that, the "annular" referred to herein refers to any suitable shape that is closed or end-to-end and hollow in the circumferential direction, and the outer contour thereof may be any suitable shape such as a circle, a rectangle, a pentagon, a hexagon, and the like.

Preferably, the cover 120 further includes a stopper member (not shown). The stopper member covers a first end of the intake duct, i.e., an end communicating with the cover intake port 121, and forms an intake gap with the first end of the intake duct. On the one hand, the first end of air inlet pipeline can be covered to the backstop component, has avoided the first end of air inlet pipeline to expose in the outside, and other debris (such as water, cockroach etc.) can not get into in the air inlet pipeline like this, have avoided air inlet pipeline to block up, can not influence in the culinary art in-process with external gas transport to the cavity space. On the other hand, an intake gap is formed between the stopper member and the first end of the intake duct so that the intake duct can communicate with the cover intake port 121, and external air can enter the intake duct through the cover intake port 121. The stop member may be configured, for example, as a decorative cover on the outer surface of the cover 120 covering the first end of the air intake conduit. Specifically, in one embodiment of the present invention, the stop member comprises a steam valve trim cover located on an outer surface of the steam valve assembly 190. The steam valve trim covers a first end of the intake conduit, i.e., an end in communication with the cover air inlet 121.

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

In one embodiment of the present invention, the waterproof member may be configured as a boss between the cover air inlet 121 and the steam outlet 193. The boss is spaced apart from the steam outlet 193. Preferably, the boss is higher than the steam outlet 193. In this way, the boss is blocked between the steam outlet 193 and the cover air inlet 121, and since the boss is higher than the steam outlet 193, condensed water does not pass over the boss into the cover air inlet 121 by gravity.

When the cover body according to the above-described aspects is used for a cooking appliance, since the steam outlet 193 is disposed around the cover air inlet, steam discharged through the steam outlet 193 may form a circumferentially continuous or closed steam curtain around and above the cover air inlet 121 to filter gas sucked into the cover air inlet 121, and impurities such as oil smoke, dust, etc. are prevented from being sucked into the cover air inlet 121, thereby preventing oil dirt or dirt from being left in the gas line or even from being blocked, and preventing the taste of food from being affected.

In another embodiment according to the present invention, as shown in fig. 10, the sidewall of the flexible chamber 271 is configured as a cylindrical structure. In yet another embodiment according to the present invention, as shown in fig. 11, the side walls of the flexible chamber 371 are constructed in a spherical structure. The flexible cavity according to the scheme has larger cavity volume, so that the airflow flow is larger, and the flexible cavity with the spherical structure can realize stable airflow output by compression and stretching in any mode.

In order to further reduce the noise of the electric gas exchange device 150 during operation, as shown in fig. 12, a vibration damping sleeve 199 is further sleeved on the outer portion of the electric gas exchange device 150, and the vibration damping sleeve 199 may be made of a flexible material such as silica gel, rubber, or 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 pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the invention. Terms such as "part," "member" and the like as used herein can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like as used herein may refer to one component being directly attached to another component or to one component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present invention has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. In addition, 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 variations and modifications are possible in light of the teachings of the invention, which variations and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (18)

1. A cooking appliance, comprising:

a cover (120);

the cover body (120) is arranged on the cooker body (110) in an openable and closable manner, and when the cover body (120) is covered on the cooker body (110), a cooking space is formed between the cover body (120) and the cooker body (110); and

-an electric gas exchange device (150), the electric gas exchange device (150) being provided in the cover (120) or the pot (110), comprising:

an electric drive unit (151);

a transmission device (160) connected to the electric driving unit (151) so as to be driven by the latter to reciprocate;

an air flow generating device (170) connected with the transmission device (160), wherein the air flow generating device (170) is provided with a flexible cavity (171), the flexible cavity (171) is switched between a pressed state and a restored state under the reciprocating motion of the transmission device (160),

the air inlet and outlet valve device (180), 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), the valve air inlet (181) is communicated with the outside atmosphere, and the valve air outlet (182) is communicated with the cooking space.

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

3. The cooking device of claim 2, wherein the corrugated structure comprises n peak configurations, wherein 2 n 8.

4. A cooking appliance according to claim 3, wherein the width L1 of the individual valleys in the corrugated structure along the axial direction of the flexible cavity (171) satisfies: l1 is less 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 less than or equal to L2 is less than or equal to 4mm.

5. The cooking appliance according to claim 2, wherein the wall thickness h1 of the main body portion of the flexible cavity (171) satisfies: h1 is more than or equal to 0.2mm and less than or equal to 1.2mm.

6. The cooking appliance of claim 2, wherein a relationship between a diameter D of a peak formation and a diameter D of a trough formation of the corrugated structure satisfies: d is more than or equal to 5mm and less than or equal to 50mm.

7. The cooking appliance according to claim 1, wherein the side wall of the flexible cavity (171) is configured as a cylindrical structure or as a spherical structure.

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

the cover body (120) is further 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 located on the outer periphery 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 cover air inlet (121).

10. The cooking appliance according to claim 8, wherein the cover air inlet (121) communicates with the valve air inlet (181) through an air inlet duct, the cover air inlet (121) being provided at a first end of the air inlet duct, the cooking appliance further comprising 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.

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 the waterproof structure is a boss that is higher than the steam outlet.

13. The cooking appliance according to claim 1, wherein the transmission means (160) comprises an eccentric (161) and an eccentric link (162) connected to the eccentric (161), the eccentric (161) being connected to the electric drive unit (151), the electric drive unit (151) being able to drive the eccentric (161) and the eccentric link (162) in rotation, the eccentric link (162) being connected to the air flow generating means (170).

14. The cooking appliance according to claim 13, wherein the air flow generating device (170) includes a closed end (172) and an air guide end (173) at both ends of the flexible chamber (171), respectively, 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).

15. Cooking appliance according to claim 1, wherein the inlet and outlet valve means (180) comprises a first non-return valve (178), a second non-return valve (179) and a non-return valve membrane (183) arranged between the first non-return valve (178) and the second non-return valve (179), the valve inlet (181) and the valve outlet (182) being arranged on the second non-return valve (179) respectively, the first non-return valve (178) being provided with an inlet channel (184) and an outlet channel (185) corresponding to the valve inlet (181) and the valve outlet (182), respectively, the non-return valve membrane (183) comprising two flexible membranes corresponding to the valve inlet (181) and the valve outlet (182), respectively, the flexible membranes being capable of elastic deformation with the direction of the air flow.

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

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

18. The cooking appliance according to claim 1, wherein the electric gas exchange device (150) lies substantially horizontally in the cover (120).

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