CN217185728U - 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 comprises an electric drive unit, a transmission device, a gas flow generating device and a gas inlet and outlet valve device. The airflow generating device is connected with the transmission device and comprises a flexible cavity and an opening end arranged at one end of the flexible cavity, and the flexible cavity is switched between a squeezed state and a recovered state under the reciprocating motion effect of the transmission device. The air inlet and outlet valve device is provided with a rigid connecting end, the connecting end is connected to the opening end, the air inlet and outlet valve device 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. Wherein the open end of the flexible cavity is in tight fit with the rigid connection end in a flexible deformation manner. The scheme can prevent the air inlet and outlet valve device and the air flow generating device from falling off.

Description

Cooking utensil

Technical Field

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

Background

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

A solution to the above problem is known by using an air pump to blow air into the inner pot of the cooking appliance. Air pumps are generally provided with a one-way valve to enable one-way ingress and egress of air flow. Existing check valves often risk falling out due to the impact of the air flow pressure. It is also known to fasten part of the non-return valve to the air pump by means of a screw assembly, but this construction and installation are relatively complex and at the same time relatively costly.

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

SUMMERY OF THE UTILITY MODEL

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

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

a cover body;

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

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 airflow generating device is connected with the transmission device and comprises a flexible cavity and an opening end arranged at one end of the flexible cavity, and the flexible cavity is switched between a squeezed state and a recovered state under the reciprocating motion action of the transmission device;

an air inlet and outlet valve device having a rigid connection end connected to the open end, the air inlet and outlet valve device having a valve air inlet and a valve air outlet, the valve air inlet communicating with the outside atmosphere, the valve air outlet communicating with the cooking space,

wherein the open end of the flexible cavity is in tight fit with the rigid connection end in a flexible deformation manner.

During cooking, the electrically powered gas exchange device is capable of drawing gas in through the valve inlet port and delivering the gas into the cooking volume through the valve outlet port when food in the cooking volume is in a boiling phase. The temperature difference between the delivered gas and the foam in the cooking space exists, so that the delivered gas can liquefy and shrink the steam in the foam to break after entering the cooking space and contacting the foam accumulated in the cooking space, and the overflow of the pot is prevented. 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. The scheme has the advantages of large air flow, low working noise and low cost.

In this scheme, the open end receives airflow pressure's impact with business turn over pneumatic valve device connection department, has the risk of dragging and dropping, and closely cooperates through the flexible deformation mode with flexible open end and rigid link, can prevent to produce between the two and drop. The structure is simple, the assembly is easy, and the cost is low.

Optionally, the air valve inlet and outlet device comprises a valve body, at least one circle of clamping groove is formed in one of the inner side wall of the opening end and the outer side wall of the valve body, and at least one circle of convex rib matched with the clamping groove is formed in the other one of the inner side wall of the opening end and the outer side wall of the valve body. The scheme can further realize the close fit between the opening end of the flexible cavity and the valve body, and the falling off is prevented.

Optionally, the cross section of the open end is elliptical, the inner long axis of the inner side wall of the open end is phia, the inner short axis is phia 1, the cross section of the valve body is elliptical, the outer long axis of the outer side wall of the valve body is phib, and the outer short axis is phib 1, wherein phia < phib, and phia 1 < phib 1. This scheme can guarantee to have better sealed effect between valve body and the open end to can further anti-drop.

Optionally, the inner long axis phia, the inner minor axis phia 1 of the inner sidewall of the open end and the outer long axis phib, the outer minor axis phib 1 of the outer sidewall of the valve body satisfy: 1mm < phi b-phi a < 2mm and 1mm < phi b 1-phi a1 < 2 mm. This scheme can further guarantee to have better sealed effect between valve body and the open end to can further anti-drop.

Optionally, the outer sidewall of the open end of the ellipse has a major axis φ c, a minor axis φ c1, wherein (φ c- φ a)/2 is greater than or equal to 2mm, (φ c1- φ a1)/2 is greater than or equal to 2 mm. This scheme can guarantee the firmness of the lateral wall of open end.

Optionally, the at least one circle of clamping groove is formed in the inner side wall of the opening end, the at least one circle of convex rib is formed in the outer side wall of the valve body, and the radial maximum size of the at least one circle of convex rib is larger than that of the at least one circle of clamping groove.

Optionally, the cross sections of the ribs and the slots are both elliptical, and the major axis dimension phid and the minor axis dimension phid 1 of the at least one circle of ribs and the major axis dimension phie and the minor axis dimension phie 1 of the at least one circle of slots satisfy: (phi d-phi e)/2 is more than or equal to 0.5mm and (phi d 1-phi e1)/2 is more than or equal to 0.5 mm.

The two schemes can enable the clamping groove to be acted by radial force of the convex rib, so that the phenomenon that the flexible cavity is pulled frequently for a long time and falls off can be prevented.

Optionally, the transmission device includes 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 further includes a closed end located at the other end of the flexible cavity, respectively, the closed end is provided with a through hole, and the eccentric link is connected to the closed end. The scheme is convenient to assemble and easy to realize.

Optionally, the central axis of the through hole, the central axis of the valve air inlet and the central axis of the valve air outlet are all in the same plane. This scheme can guarantee that its body of flexible chamber motion keeps in a relatively straight state all the time, avoids its body to take place relative skew or dislocation, and leads to the body to break and decreases or produce unnecessary friction and produce the noise.

Optionally, a fool-proof structure is arranged between the opening end and the valve body. This scheme can guarantee the correct installation between open end and the valve body.

Optionally, the fool-proof structure includes a convex portion disposed on the valve body and a concave portion disposed on the opening end and corresponding to the convex portion. This scheme can guarantee the correct installation between open end and the valve body.

Optionally, the air valve access device further comprises:

the additional valve body is provided with an air inlet channel and an air outlet channel which are communicated with the flexible cavity, the air inlet channel and the air outlet channel respectively correspond to the valve air inlet and the valve air outlet, the valve air inlet is communicated with the outside atmosphere, and the valve air outlet is communicated with the cooking space; and

the one-way valve film is arranged between the additional valve body and the valve body and comprises a film body, and an air inlet film and an air outlet film which are connected with the film body and have a gap between the film body and the air inlet film.

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

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

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

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

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

Drawings

The following drawings of the utility model are used as part of the utility model for understanding the utility model. 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 a portion of the lid of the cooking appliance shown in FIG. 1 with the face cover omitted to clearly show the structure of the interior of the lid;

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

FIG. 4 is a schematic 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 one-way valve membrane of the air inlet and outlet valve assembly shown in FIG. 8;

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

FIG. 11 is a schematic view of the assembly of the gas flow generating device and the gas inlet and outlet valve device of the electrical gas exchange device shown in FIG. 5;

fig. 12 is a schematic view of a portion of a lid of a cooking appliance, according to an embodiment of the present invention;

FIG. 13 is a perspective view of the electric gas exchange device of the cooking appliance shown in FIG. 1, wherein a damping sleeve is provided on the exterior 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 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 known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions and should not be construed as being limited to the embodiments set forth herein.

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

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

As shown in fig. 1, when the cover 120 is closed over the pot body 110, a cooking space 140 is formed between the cover 120 and the pot body 110 (specifically, the inner pot 130 of the pot body 110). The cooking space 140 includes a food storage space 141 and a cavity space 142. Specifically, the food storage space 141 refers to a space where food is actually stored. The cavity space 142 is located above the food storage space 141. That is, when the cover 120 is covered on the pot body 110, the cavity space 142 is a space between the upper surface of the food and the cover 120. There is no strict 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 generally horizontally recumbent within the cover 120 to reduce the size of the cover 120 in the vertical direction. For example, the electrical gas exchange device 150 may be disposed between the inner liner and the upper cover of the cover 120.

As shown in fig. 5, the 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. The transmission 160 is connected to the electric drive unit 151 such that the electric drive unit 151 can drive the transmission 160 to reciprocate. The air flow generating means 170 has an air flow receiving chamber, preferably a flexible chamber 171, and the flexible chamber 171 is connected to the actuator 160 so as to be changed in shape by the reciprocating motion of the actuator 160. Specifically, the flexible chamber 171 can be switched between a squeezed state and a restored state, and when the flexible chamber 171 is switched between the two states, the volume of the flexible chamber 171 can be changed, so that a pressure change can be generated in the flexible chamber 171.

The air inlet and outlet valve device 180 is connected with the flexible cavity 171, the air inlet and outlet valve device 180 is provided with a valve air inlet 181 and a valve air outlet 182 which can be communicated with the cavity of the flexible cavity 171, and the valve air inlet 181 and the valve air outlet 182 are both one-way through ports. The valve inlet port 181 is in communication with the ambient atmosphere such that ambient atmosphere may enter the flexible chamber 171 via the valve inlet port 181. Valve outlet 182 communicates with the cooking volume such that gas in flexible chamber 171 can enter the cooking volume via valve outlet 182. The structure of the air valve unit 180 will be described in detail later.

Specifically, the valve inlet port 181 communicates with the cap inlet port 121 through an inlet line (not shown) to allow the outside atmosphere to enter. A first end of the inlet line communicates with the cap 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 and 6, the transmission device 160 includes an eccentric 161 and an eccentric connecting rod 162 connected to the eccentric 161, the eccentric 161 is connected to the electric driving unit 151, the electric driving unit 151 can drive the eccentric 161 to rotate, the eccentric 161 can drive the eccentric connecting rod 162 to rotate, and the eccentric connecting rod 162 is connected to the flexible chamber 171. Specifically, the airflow generating device 170 includes a closed end 172 and an open 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 valve device 180 is connected to the open end 173. Preferably, the flexible chamber 171 and the closed end 172 and the open end 173 of both ends of the flexible chamber 171 are integrally made of a flexible material.

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 length direction of the eccentric link 162, and the eccentric link 162 extends into the through hole 174. As eccentric link 162 rotates, flexible chamber 171 is caused to reciprocate 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. As shown in fig. 5 and 7, the corrugated structure includes a plurality of peak configurations. This solution enables the flexible chamber 171 to be more easily compressed and stretched, and less easily broken, and has a reliable fatigue life by configuring the sidewalls of the flexible chamber 171 as a corrugated structure.

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

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 valve body 178 (as an example of an additional valve body), a second valve body 179 (as an example of a valve body), and a check valve film 183 provided between the first valve body 178 and the second valve body 179. The first and second valve bodies 178 and 179 are each connected in the flexible open end 173, thus collectively forming a connection end to and from the air valve assembly 180. The first valve body 178 and the second valve body 179 are made of a rigid material. Reference herein to "rigid" is to "flexible" and means that the material has the property of being hard and not easily deformed. In this embodiment, the connection between the open end 173 and the air valve device 180 is impacted by the airflow pressure, which may cause the risk of pulling and falling off, and the flexible open end 173 and the rigid connection end are closely matched in a flexible deformation manner, thereby preventing the falling off between the two. The structure is simple, the assembly is easy, and the cost is low.

The first valve body 178 is disposed closer to the flexible chamber 171. An air inlet channel 184 and an air outlet channel 185 are arranged on the first valve body 178, the air inlet channel 184 and the air outlet channel 185 are both communicated with the flexible cavity 171, the air inlet channel 184 and the air outlet channel 185 respectively correspond to the valve air inlet 181 and the valve air outlet 182, and the valve air inlet 181 and the valve air outlet 182 are respectively arranged on the second valve body 179.

As shown in fig. 8 and 9, the check valve film 183 includes a film body 183a, and an inlet diaphragm 186 and an outlet diaphragm 187 corresponding to the valve inlet 181 and the valve outlet 182, respectively, and the check valve film 183 is made of a flexible material. Both of the inlet diaphragm 186 and the outlet diaphragm 187 are connected to the diaphragm body 183a, and a gap 183b extending in the circumferential direction is provided between each of the inlet diaphragm 186 and the outlet diaphragm 183 a.

Further, in order to realize the one-way passage of the gas, as shown in fig. 5 and 8, a first retainer 188 is provided at a position of the first valve body 178 corresponding to the valve outlet 182, and the first retainer 188 protrudes toward the outlet diaphragm 187 and abuts on the outlet diaphragm 187. The first retainer ring 188 is disposed around the air outlet passage 185. A second stopper 189 is provided at a position of the second valve body 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. A second stop 189 is disposed about the valve inlet 181.

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

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

As shown in fig. 7 and 8, in order to achieve a tight fit between the air flow generator 170 and the air valve device 180, the inner sidewall of the open end 173 of the air flow generator 170 is provided with at least one ring of catch 173a, and the catch 173a is continuously provided in the circumferential direction of the open end 173. Correspondingly, the outer side wall of the second valve body 179 is provided with at least one circle of ribs 179a, and the ribs 179a are continuously provided in the circumferential direction of the second valve body 179. The rib 179a has a size corresponding to the size of the card slot 173a, and the rib 179a can be fitted in the card slot 173 a. In the illustrated embodiment, the inner sidewall of the open end 173 is provided with two rings of detents 173a, and the outer sidewall of the second valve body 179 is provided with two rings of ribs 179 a.

In the present embodiment, the open end 173 and the air inlet/outlet valve device 180 are connected between flexible and rigid parts, and the connection part between the open end 173 and the air inlet/outlet valve device 180 is impacted by the air flow pressure, so that the air inlet/outlet valve device may be pulled and detached, and the inner sidewall of the open end 173 and the outer sidewall of the second valve body 179 are provided with the locking groove 173a and the protruding rib 179a, which are engaged with each other, so as to further achieve the tight engagement between the two parts, and prevent the air flow generator 170 from being detached during the movement process. The structure is simple, the assembly is easy, and the cost is low.

In one embodiment, the open end 173 has an elliptical cross-section and the second valve body 179 has an elliptical cross-section. As shown in fig. 7 and 8, the inner major axis of the inner sidewall of the open end 173 is phia, the inner minor axis is phia 1 (not shown), the outer major axis of the outer sidewall of the second valve body 179 is phib, and the outer minor axis is phib 1 (not shown), wherein phia < phib, phia 1 < phib 1. Further preferably, 1mm < φ b- φ a < 2mm, and 1mm < φ b1- φ a1 < 2 mm. This arrangement allows the second valve body 179 to be interference fit in the open end 173, thereby ensuring a good seal between the second valve body 179 and the open end 173.

As shown in FIG. 7, the outer sidewall of the open end 173 has a major axis φ c, a minor axis φ c1 (not shown), wherein (φ c- φ a)/2 ≧ 2mm, (φ c1- φ a1)/2 ≧ 2mm, that is, the sidewall thickness of the open end 173 is greater than or equal to 2 mm. This scheme can guarantee the firmness of the lateral wall of open end 173, reduces the deformation, improves its life.

Preferably, the cross sections of the convex ribs and the clamping grooves are also oval. The radial maximum dimension of each ring of ribs 179a is greater than the radial maximum dimension of its corresponding ring of detents 173 a. Further preferably, the major axis dimension phid and the minor axis dimension phid 1 (not shown) of the rib 179a and the major axis dimension phie and the minor axis dimension phie 1 (not shown) of the notch 173a satisfy: (φ d- φ e)/2 is not less than 0.5mm and (φ d1- φ e1)/2 is not less than 0.5 mm. This arrangement allows the locking groove 173a to be acted upon by the radial force of the rib 179a, thereby preventing the flexible chamber 171 from falling off due to frequent stretching for a long time.

In a preferred embodiment, the central axis of the through bore 174, the central axis of the valve inlet 181, and the central axis of the valve outlet 182 all lie in the same plane. This scheme can guarantee that its body of flexible chamber 171 motion in-process keeps a relatively straight state all the time, avoids its body to take place relative skew or dislocation, and leads to the body to break or produce unnecessary friction and produce the noise. To achieve this, and to ensure proper installation between the open end 173 and the second valve body 179, a foolproof structure is provided between the open end 173 and the second valve body 179. As shown in fig. 11, the fool-proof structure includes a protrusion (not shown) provided on the second valve body 179 and a recess 173b provided on the open end 173, the protrusion corresponding to the recess 173 b. This arrangement further facilitates assembly of the open end 173 and the second valve body 179 together, avoiding assembly errors.

As shown in fig. 9, inlet diaphragm 186 and outlet diaphragm 187 are each configured as circular diaphragms. The inlet diaphragm 186 and the membrane body 183a are connected by two first connecting ribs 186a disposed oppositely, and the outlet diaphragm 187 and the membrane body 183a are connected by two second connecting ribs 187a disposed oppositely. Preferably, the first and second tie ribs 186a and 187a have the same width w. The width of the connecting ribs referred to herein refers to the extension of the connecting ribs in the circumferential direction of the membrane sheet. Because the diaphragm 186 that admits air and the diaphragm 187 of giving vent to anger receive intermittent type nature to make a round trip to buckle for a long time, in order to prevent its fatigue fracture's problem, the width of splice bar is crucial, and the too wide angle that can influence the diaphragm and buckle of splice bar, and the too narrow again of splice bar reduces intensity, and the width of splice bar is also relevant with the diameter of the diaphragm 186 that admits air and the diaphragm 187 of giving vent to anger simultaneously. Therefore, in a preferred embodiment, the width w of the first connecting rib 186a and the second connecting rib 187a and the diameter Φ 2 of the inlet diaphragm 186 and the diameter Φ 1 of the outlet diaphragm 187 satisfy: 0.2 phi 2 < w < 0.5 phi 1. This scheme can improve the joint strength between diaphragm and the membrane body 183a, prevents that admit air diaphragm 186 and the diaphragm 187 of giving vent to anger from receiving intermittent back and forth bending fatigue fracture for a long time.

During cooking, when the temperature of the food cooked in the inner pot is critically boiled or just before the boiling time is over, or when the temperature in the inner pot reaches a set value, viscous substances such as starch in the food are separated 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 is controlled to drive the transmission 160 to reciprocate, thereby compressing and stretching the flexible chamber 171. When the eccentric 161 is in a position proximate to the flexible chamber 171, the flexible chamber 171 is compressed, the chamber volume is reduced, the pressure of the air inside the chamber is greater than the pressure outside the chamber, forcing the air out through the air outlet channel 185 and the valve air outlet 182. When the eccentric 161 is in a position away from the flexible cavity 171, the flexible cavity 171 is stretched, the cavity volume is increased instantaneously, the air pressure inside the cavity is small, and the air with the external large pressure enters the flexible cavity 171 through the valve air inlet 181 and the air 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, the temperature difference between the delivered gas and the foam in the chamber space 142 exists, so that the delivered gas can liquefy and shrink the steam in the foam to be broken after entering the chamber space 142 and contacting the foam accumulated in the chamber space 142, thereby preventing the overflow. The overflow can be avoided even under the condition of fast cooking with large fire.

As shown in fig. 1, 3 and 12, the cover body 120 is further provided with a steam valve assembly 190, the steam valve assembly 190 including 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. 12, 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. 12, the vapor outlet 193 is disposed around the lid 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 configured as a circumferentially closed ring which surrounds the lid 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, that is, an end communicating with the cap intake port 121, and forms an intake gap with the first end of the intake pipe. On the one hand, the backstop component can cover the first end of air inlet pipe way, has avoided the first end of air inlet pipe way to expose outside, and other debris (such as water, cockroach etc.) can not get into the air inlet pipe way like this, have avoided the air inlet pipe way to block up, can not influence and carry external gas to the cavity space at the culinary art in-process. 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 external air can enter the intake pipe through the cap intake port 121. The stop member may be configured, for example, as a decorative cover that covers the first end of the intake conduit at the outer surface of the cover 120. Specifically, in one embodiment of the present invention, the stop member comprises a steam valve trim cover located on an outer surface of steam valve assembly 190. The steam valve trim cover covers a first end of the intake duct, i.e., an end communicating with the cover intake port 121.

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

In one embodiment of the present invention, the waterproofing member may be configured as a boss located between the cover air inlet 121 and the steam outlet 193. The boss is spaced apart from the vapor outlet 193. Preferably, the boss is higher than the steam outlet 193. In this way, the bosses are blocked between the steam outlets 193 and the 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. 13, 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," "member," and the like, when 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 as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

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

Claims (16)

1. A cooking appliance, comprising:

a cover (120);

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

an electrically powered gas exchange device (150), said electrically powered gas exchange device (150) being disposed in said lid (120) or pot (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) comprises a flexible cavity (171) and an opening end (173) arranged at one end of the flexible cavity, and under the reciprocating motion action of the transmission device (160), the flexible cavity (171) is switched between a squeezed state and a reset state;

an air inlet and outlet valve arrangement (180), said air inlet and outlet valve arrangement (180) having a rigid connection end, said connection end being connected to said open end (173), said air inlet and outlet valve arrangement (180) having a valve air inlet (181) and a valve air outlet (182), said valve air inlet (181) being in communication with the outside atmosphere and said valve air outlet (182) being in communication with said cooking volume,

wherein the open end of the flexible cavity is in tight fit with the rigid connection end in a flexible deformation manner.

2. The cooking appliance according to claim 1, wherein the air inlet and outlet valve assembly (180) comprises a valve body (179), one of the inner sidewall of the open end (173) and the outer sidewall of the valve body (179) is provided with at least one ring of catch grooves (173a), and the other of the inner sidewall of the open end (173) and the outer sidewall of the valve body (179) is provided with at least one ring of ribs (179a) which are engaged with the catch grooves (173 a).

3. The cooking appliance of claim 2, wherein the open end (173) is elliptical in cross-section, and wherein the inner major axis of the inner sidewall of the open end (173) is φ a and the inner minor axis is φ a1, wherein the cross-section of the valve body (179) is elliptical, and wherein the outer major axis of the outer sidewall of the valve body (179) is φ b and the outer minor axis is φ b1, wherein φ a < φ b, φ a1 < φ b 1.

4. The cooking appliance according to claim 3, wherein the inner long axis φ a and the inner short axis φ a1 of the inner sidewall of the open end (173) and the outer long axis φ b and the outer short axis φ b1 of the outer sidewall of the valve body (179) satisfy: 1mm < phi b-phi a < 2mm and 1mm < phi b 1-phi a1 < 2 mm.

5. The cooking appliance of claim 3, wherein the outer sidewall of said open end of the oval shape has a major axis φ c, a minor axis φ c1, wherein (φ c- φ a)/2 is greater than or equal to 2mm and (φ c1- φ a1)/2 is greater than or equal to 2 mm.

6. The cooking appliance according to claim 2, wherein the at least one ring of detents (173a) is provided on an inner sidewall of the open end (173), the at least one ring of ribs (179a) is provided on an outer sidewall of the valve body (179), and a radial maximum dimension of the at least one ring of ribs (179a) is greater than a radial maximum dimension of the at least one ring of detents (173 a).

7. The cooking appliance according to claim 6, wherein the cross-section of the rib and the slot is elliptical, and the major axis dimension phid and the minor axis dimension phid 1 of the at least one ring of rib (179a) and the major axis dimension phie and the minor axis dimension phie 1 of the at least one ring of slot (173a) satisfy: (phi d-phi e)/2 is more than or equal to 0.5mm and (phi d 1-phi e1)/2 is more than or equal to 0.5 mm.

8. Cooking appliance according to claim 1, characterized in that said transmission means (160) comprise an eccentric wheel (161) and an eccentric connecting rod (162) connected to said eccentric wheel (161), said eccentric wheel (161) being connected to said electric drive unit (151), said electric drive unit (151) being able to drive in rotation said eccentric wheel (161) and said eccentric connecting rod (162), said eccentric connecting rod (162) being connected to said air flow generating means (170).

9. The cooking appliance according to claim 8, wherein the airflow generating device (170) further comprises a closed end (172) at the other end of the flexible chamber, respectively, the closed end being provided with a through hole (174), the eccentric link (162) being connected to the closed end (172).

10. The cooking appliance according to claim 9, wherein the central axis of the through hole (174), the central axis of the valve inlet (181) and the central axis of the valve outlet (182) are all in the same plane.

11. The cooking appliance according to claim 2, wherein a foolproof structure is provided between the open end (173) and the valve body (179).

12. The cooking appliance according to claim 11, wherein the fool-proof structure comprises a protrusion provided on the valve body (179) and a recess (173b) provided on the open end (173) corresponding to the protrusion.

13. The cooking appliance of claim 2, wherein said air valve means (180) further comprises:

an additional valve body (178), wherein an air inlet channel (184) and an air outlet channel (185) communicated with the flexible cavity are arranged on the additional valve body (178), the air inlet channel (184) and the air outlet channel (185) respectively correspond to the valve air inlet (181) and the valve air outlet (182), the valve air inlet (181) is communicated with the outside atmosphere, and the valve air outlet (182) is communicated with the cooking space; and

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

14. 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.

15. The cooking appliance of claim 14 wherein said corrugated structure includes n wave peak configurations, wherein 2 ≦ n ≦ 8.

16. 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 lid body (120) is further provided with a lid inlet port (121), the lid inlet port (121) communicates with the valve inlet port (181), and the position of the steam outlet (193) on the lid body (120) is located on the outer peripheral side of the lid inlet port (121).

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