CN217185669U - Cooking utensil - Google Patents

Abstract

The utility model provides a cooking utensil, including lid, a kind of deep pot body and automatic gas exchange device. The automatic gas exchange device is arranged in the cover body or the cooker body and comprises an electric drive unit, a transmission device, an airflow generation device and an air inlet and outlet valve device. The transmission is connected to the electric drive unit. The airflow generating device is provided with a flexible cavity, a closed end and an air guide end, the closed end is connected with the transmission device, 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 connected to the air guide end. Wherein, one in blind end and the transmission is provided with the through opening, and another in blind end and the transmission is provided with the connecting axle, and the connecting axle extends and extends through the through opening, and interference fit between connecting axle and the through opening. The scheme can prevent the relative rotation between the flexible cavity and the transmission device from generating noise.

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.

It is known to solve the above problem by blowing air into the inner pot of the cooking appliance using an air pump. However, the existing air pump often generates large noise during operation, thereby affecting the use experience of users.

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 cooker body is provided with a cover body which can be opened and closed, and when the cover body covers the cooker body, a cooking space is formed between the cover body and the cooker body; and

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

an electric drive unit;

a transmission device connected with the electric drive unit so as to be driven by the electric drive unit to reciprocate; the air flow generating device is provided with a flexible cavity, and a closed end and an air guide end which are respectively arranged at two ends of the flexible cavity, the closed end is connected with the transmission device, and the flexible cavity is switched between a squeezed state and a recovered state along a first direction under the reciprocating motion effect of the transmission device;

an air inlet and outlet valve device connected to the air guide 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, one of blind end with among the transmission is provided with through opening, just another one of blind end with among the transmission is provided with the connecting axle, the connecting axle extends through opening, just the connecting axle with interference fit between the through opening.

During cooking, the automatic gas exchange device is capable of drawing in gas through the valve inlet and delivering the gas into the cooking volume through the valve outlet when food in the cooking volume is in a boiling phase. The delivered gas is typically in a cold-hot temperature differential with the foam in the cooking space, so that the delivered gas, after entering the cooking space and contacting the foam accumulated in the cooking space, can liquefy and contract to break the vapor in the foam, preventing it from overflowing the pot. The overflow can be avoided even under the condition of fast cooking with large fire. 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 addition, set up through opening through one in blind end and the transmission, another sets up the connecting axle, makes the connecting axle extend and extends through opening, and makes interference fit between connecting axle and the opening that runs through, can prevent to appear relative rotation between the two and lead to flexible chamber to appear deflecting and produce the friction and send the noise.

Optionally, the transmission comprises an eccentric connected with the electric drive unit and an eccentric connecting rod connected with the eccentric, the eccentric connecting rod being connected to the closed end. The scheme is convenient to assemble and easy to realize.

Optionally, the eccentric connecting rod includes the connecting shaft, the through opening is disposed at the closed end, the through opening extends along a second direction, and the second direction is perpendicular to the first direction. The scheme is convenient to assemble and easy to realize.

Optionally, the connecting shaft includes a shaft body with a circular cross section and positioning keys connected to two opposite ends of the shaft body along a radial direction of the shaft body, the through opening includes a shaft hole with a circular cross section and positioning holes arranged at two opposite ends of the shaft hole along the radial direction of the shaft hole, the shaft body is matched with the shaft hole, and the positioning keys are matched with the positioning holes. This scheme can improve the reliability of cooperation between axis body and the shaft hole.

Optionally, the diameter phi 2 of the cross section of the shaft body is larger than the diameter phi 1 of the cross section of the shaft hole, and phi 2-phi 1 are larger than or equal to 1mm and smaller than or equal to 2 mm. This scheme can improve the reliability of cooperation between axis body and the shaft hole.

Optionally, the radially largest distance between the positioning keys is larger than the radially largest distance between the positioning holes. This scheme can improve the reliability of cooperation between axis body and the shaft hole.

Optionally, the eccentric link includes the through opening, and the closed end includes the connecting shaft, and the through opening extends in the first direction. The scheme is convenient to assemble and easy to realize.

Optionally, the closed end further comprises a stopper connected at an end of the connecting shaft opposite to the flexible cavity, the stopper having a circumferential flange projecting radially outward relative to the connecting shaft. This scheme can prevent that the connecting axle from coming off from the through opening.

Optionally, an axial dimension of the connecting shaft in the first direction is smaller than or equal to an axial dimension of the through opening in the first direction, and/or a cross section of the connecting shaft and the through opening is circular, and a cross section diameter of the connecting shaft is larger than a cross section diameter of the through opening. This scheme can improve the reliability of cooperation between axis body and the shaft hole.

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

Optionally, the corrugated structure 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 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 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 that the circumference is continuous 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 blockked up even in having avoided the gas line, also avoided influencing the taste of food.

Drawings

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

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

FIG. 2 is a schematic top view of 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 automatic gas exchange device of the cooking appliance shown in FIG. 1;

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

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

FIG. 8 is a schematic view of a transmission cooperating with the airflow generating device of FIG. 7;

FIG. 9 is a schematic sectional view of an air flow generating apparatus of an automatic air exchanging apparatus of a cooking appliance according to another embodiment;

FIG. 10 is a schematic view of a transmission cooperating with the airflow generating device of FIG. 9;

FIG. 11 is a schematic cross-sectional view of an inlet and outlet gas valve assembly of the automatic gas exchange device shown in FIG. 5;

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

fig. 13 is a perspective view of an automatic gas exchanging device of the cooking appliance shown in fig. 1, in which a damping sleeve is provided outside the automatic gas exchanging 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, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details set forth herein which are known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions and should not be construed as being limited to the embodiments set forth herein.

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

As shown in fig. 1, the cooking appliance 100 includes a pot body 110. The pot body 110 may have a generally rounded rectangular parallelepiped shape, a generally cylindrical shape, or any other suitable shape. The pot body 110 is provided therein with an inner pot 111 of a generally cylindrical shape or any other suitable shape. The inner pot 111 can be freely put into or taken out of the inner pot receiving part of the pot body 110 to facilitate cleaning of the inner pot 111. The inner pot 111 is used to store food to be cooked, such as rice, soup, etc. The top of the inner pan 111 has a top opening. The user can store food to be cooked in the inner pot 111 through the top opening or take cooked food out of the inner pot 111 through the top opening.

An inner pot heating means (not shown) for heating the inner pot 111 is further provided in the pot body 110. The inner pot heating means may heat the inner pot 111 at the bottom and/or the side of the inner pot 111. The inner pot heating device can be an electric heating tube, and can also be an induction heating device such as an electromagnetic coil.

As shown in fig. 1, the pot body 110 is provided with a lid 120. The shape of the cover 120 substantially corresponds to the shape of the pot body 110. For example, the cover 120 may have a rounded rectangular parallelepiped shape. The cover body 120 includes an inner cover 123, and the inner cover 123 may be a detachable inner cover so that the inner cover 123 can be detached for cleaning. The lid 120 is provided to the pot body 110 in an openable and closable manner, and is used to cover the entire top of the pot body 110 or at least the inner pot 111 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 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 111 of the pot body 110). The cooking space 140 includes a food storage space 141 and a cavity space 142. Specifically, the food storage space 141 refers to a space where food is actually stored. The cavity space 142 is located above the food storage space 141. That is, when the cover 120 is covered on the pot body 110, the cavity space 142 is a space between the upper surface of the food and the cover 120. There is no strict distinction between the food storage space 141 and the cavity space 142, and the volume of the two spaces may change according to the specific change of the food material volume.

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

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

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

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

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

As shown in fig. 5, the automatic gas exchange device 150 includes an electric driving unit 151, a transmission 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 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 the squeezed state and the restored state along the first direction D1, and when the flexible chamber 171 is switched between the two states, the 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 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.

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

In one embodiment, as shown in fig. 5, 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 an output shaft of the electric driving unit 151, the electric driving unit 151 can drive the eccentric 161 to rotate, the eccentric 161 can drive the eccentric connecting rod 162 to rotate, and the eccentric connecting rod 162 is connected to the flexible chamber 171. Specifically, the eccentric link 162 includes a first link portion 163 and a second link portion 164 (as an example of a connecting shaft) disposed substantially perpendicular to the first link portion 163, the first link portion 163 being connected to the eccentric 161, and the second link portion 164 being connected to the flexible chamber 171. The air flow generating device 170 includes a closed end 172 and an air guide end 173 respectively located at both ends of the flexible chamber 171, the second link portion 164 of the eccentric link 162 is connected to the closed end 172 and thus indirectly connected to the flexible chamber 171, and the air inlet and outlet valve device 180 is connected to the air guide end 173.

As shown in fig. 5 to 7, the closed end 172 of the flexible chamber 171 has a through opening 174, the through opening 174 is penetrated in a second direction D2 perpendicular to the first direction D1, and the second link portion 164 extends into the through opening 174. The second link portion 164 is in interference fit with the through opening 174.

As shown in fig. 7 and 8, the second link portion 164 includes a shaft body 164a having a circular cross section and positioning keys 164b connected to opposite ends of the shaft body 164a in a radial direction of the shaft body 164a, and the through opening 174 includes a shaft hole 174a having a circular cross section and positioning holes 174b provided at opposite ends of the shaft hole 174a in the radial direction of the shaft hole 174 a. The shaft body 164a is engaged with the shaft hole 174a, and the positioning key 164b is engaged with the positioning hole 174 b. This arrangement can prevent the relative rotation between the shaft body 164a and the shaft hole 174a from causing the deflection of the flexible chamber 171 to generate friction and generate noise, and can improve the reliability of the fit between the shaft body 164a and the shaft hole 174 a.

Preferably, the cross-sectional diameter φ 2 of the shaft body 164a is greater than the cross-sectional diameter φ 1 of the shaft hole 174a, 1mm ≦ φ 2- φ 1 ≦ 2mm, and the radial maximum distance t2 between two positioning keys 164b is greater than the radial maximum distance t1 between the two positioning holes 174b corresponding thereto. This arrangement can improve the reliability of the fit between the shaft body 164a and the shaft hole 174 a.

Preferably, the eccentric link 162 further includes a stopper 165, and the stopper 165 is disposed at an end of the second link portion 164 opposite to the eccentric 161. The radial minimum dimension of the blocking portion 165 is larger than the radial maximum dimension of the through opening 174 to prevent the eccentric link 162 from falling out of the through opening 174.

In another embodiment, the through opening 174 is provided on the eccentric link 162, and the closed end 172 is provided with the connecting shaft 172 a. As shown in fig. 9 and 10, the closed end 172 includes a connecting shaft 172a and a stopper 172b connected to an end of the connecting shaft 172 a. The eccentric link 162 and a through opening 174 provided on the eccentric link 162 may extend in the first direction D1, and the connecting shaft 172a may extend through the through opening 174. It can be seen that in this embodiment, the body of the closed end 172 is used as a connecting shaft.

A stopper 172b is provided at an end of the connecting shaft 172a opposite to the flexible chamber 171, the stopper 172b having a circumferential flange 172c projecting radially outward relative to the connecting shaft 172 a. Preferably, the radial minimum dimension of the circumferential flange 172c is greater than the radial maximum dimension of the through opening 174. This arrangement can prevent the connecting shaft 172a from falling out of the through opening 174.

Preferably, with continued reference to fig. 9 and 10, an axial dimension L3 of the connecting shaft 172a in the first direction D1 is less than or equal to an axial dimension L4 of the through opening 174 in the first direction D1. The axial dimension of the connecting shaft 172a in the first direction D1 is the minimum distance between the stopping portion 172b and the flexible cavity 171. In this embodiment, by making the axial dimension L3 of the connecting shaft 172a along the first direction D1 smaller than or equal to the axial dimension L4 of the through opening 174 along the first direction D1, the through opening 174 and the connecting shaft 172a can be tightly fitted to each other, and the connecting shaft 172a is prevented from moving along the first direction D1 during the movement of the flexible cavity.

Preferably, the connecting shaft 172a and the through opening 174 are circular in cross-section, and the connecting shaft 172a has a cross-sectional diameter φ 3 larger than the cross-sectional diameter φ 4 of the through opening 174. This arrangement can improve the reliability of the fit between the connecting shaft 172a and the through opening 174.

In a preferred embodiment, as shown in fig. 5 and 7, the side wall of the flexible chamber 171 is constructed in a corrugated structure, and the corrugated flexible chamber 171 may be brought into reciprocal compression and tension as the eccentric link 162 rotates. The corrugated structure comprises at least one peak structure, and preferably, the corrugated structure comprises a plurality of peak structures, wherein the number n of peak structures satisfies: n is more than or equal to 2 and less than or equal to 8. Illustratively, the corrugated structure may include 3, 4 or 6 wave peak configurations, which can be set by one skilled in the art according to actual needs. This solution enables the flexible chamber 171 to be compressed and stretched more easily, and not to be easily broken, and has a reliable fatigue life by configuring the side wall of the flexible chamber 171 as a corrugated structure.

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

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

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

The gas inlet and outlet valve device 180 can realize the one-way passage of gas. Specifically, as shown in fig. 5 and 11, the air inlet and outlet valve device 180 includes a first valve body 178, a second valve body 179, and a check valve film 183 disposed between the first valve body 178 and the second valve body 179. The first valve body 178 is disposed closer to the flexible chamber 171, the first valve body 178 is provided with an inlet channel 184 and an outlet channel 185, the inlet channel 184 and the outlet channel 185 correspond to the valve inlet 181 and the valve outlet 182, respectively, and the valve inlet 181 and the valve outlet 182 are disposed on the second valve body 179, respectively.

Be provided with the diaphragm 186 that admits air and the diaphragm 187 of giving vent to anger that corresponds with valve air inlet 181 and valve gas outlet 182 respectively on the check valve membrane 183, admit air diaphragm 186 and the diaphragm 187 of giving vent to anger are the flexibility, and two flexible diaphragms pass through the splice bar and connect on check valve membrane 183, and have the through-hole between flexible diaphragm and the check valve membrane 183. Preferably, as shown in fig. 11, the portion of the check valve film 183 where the inlet diaphragm 186 and the outlet diaphragm 187 are provided is thinner than 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 recess at inlet diaphragm 186 opens toward first valve body 178, and the recess at outlet diaphragm 187 opens toward second valve body 179. This arrangement makes it easier for inlet diaphragm 186 and outlet diaphragm 187 to deform during inlet and outlet of gas, thereby facilitating the passage of gas.

Further, as shown in fig. 11, in order to realize one-way passage of gas, a first retainer ring 188 is provided at a position of the first valve body 178 corresponding to the valve outlet 182, and the first retainer ring 188 protrudes toward the outlet diaphragm 187 and abuts on the outlet diaphragm 187. A second stopper 189 is provided at a position of the second 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.

When ambient air flows from the valve inlet 181 into the flexible chamber 171, the air flow will bend the inlet diaphragm 186 so that it can enter the flexible chamber 171 through the inlet passage 184. At this time, the air flow enters the valve outlet 182, but the air flow cannot pass through because the air outlet diaphragm 187 is blocked by the first retaining ring 188 and cannot be bent; similarly, when the airflow in the flexible cavity 171 enters the cooking space through the valve outlet 182, the outlet diaphragm 187 is bent by the airflow and flows out through the valve outlet 182, and meanwhile, the airflow in the flexible cavity 171 also passes through the inlet channel 184, but the inlet diaphragm 186 is blocked by the second baffle 189 and cannot be bent, so that the airflow cannot pass through. The purpose of single channel one-way passing can be achieved through the mode.

During cooking, when the temperature of the food cooked in the inner pot is 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 can be controlled to drive the transmission 160 to reciprocate, so as to compress and stretch the flexible chamber 171. When the flexible chamber 171 is compressed, the chamber volume decreases and the pressure of the air inside the chamber is greater than the pressure outside the chamber, forcing the air out through the outlet passageway and valve outlet. When the flexible chamber 171 is stretched, the chamber volume increases, the air pressure inside the chamber is small, and the air with the large outside pressure enters the flexible chamber 171 through the valve inlet 181 and the inlet passage 184. The compression and extension of the flexible chamber 171 is accomplished in a cycle of motion, such that there is a continuous flow of gas out of the valve outlet 182 into the chamber volume 142. Generally, there is a temperature difference between the delivered gas and the foam in the chamber space 142, so that the delivered gas can liquefy and contract the vapor in the foam to break after entering the chamber space 142 and contacting the foam accumulated in the chamber space 142, thereby preventing the overflow. The overflow can be avoided even under the condition of fast cooking with large fire.

As shown in fig. 1, 3 and 12, the cover body 120 is further provided with a steam valve assembly 190, the steam valve assembly 190 includes a steam passage 191 communicating the cooking space with the outside of the cooking appliance, a steam inlet 192 and a steam outlet 193, and the steam outlet 193 may be provided on the decorative cover of the cover body 120 for discharging steam. The steam inlet 192 communicates with the cavity space 142. The steam inlet 192 may be provided on the inner lid 123.

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

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

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

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

Preferably, the cap body 120 further includes a stopper member (not shown). The stopper member covers a first end of the intake pipe, i.e., an end communicating with the cover intake port 121, and forms an intake gap with the first end of the intake pipe. On the one hand, the 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 the 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 120 may further include a waterproof member to prevent liquid from flowing into the cover inlet port 121.

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

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

Preferably, as shown in fig. 13, the cooking appliance 100 further comprises a housing, which is sleeved outside the automatic gas exchanging device 150. The housing may include a first housing 135, a second housing 136 and a third housing 137, the first housing 135 is disposed outside the electric driving unit 151, the third housing 137 is disposed outside the air valve device 180, and the second housing 136 connects the first housing 135 and the third housing 137, and is disposed outside the air flow generating device 170 and the transmission device 160. The first casing 135, the second casing 136 and the third casing 137 may be made of soft materials such as rubber, silicon gel and the like, so as to play a role of noise reduction. In other embodiments, the first casing, the second casing 136 and the third casing 137 may be made of other hard materials that can reduce noise to increase the strength.

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 being directly attached to another component or one component 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 not applicable 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 above embodiments, and that many variations and modifications may be made in accordance with the teachings of the present invention, all within the scope of the present invention as claimed. The scope of the present invention is defined by the appended claims and their equivalents.

Claims (12)

1. A cooking appliance, comprising:

a cover (120);

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

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

an electric drive unit (151);

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

the air flow generating device (170) is provided with a flexible cavity (171), and a closed end (172) and an air guide end (173) which are respectively arranged at two ends of the flexible cavity, the closed end (172) is connected with the transmission device (160), and under the reciprocating action of the transmission device (160), the flexible cavity (171) is switched between a squeezed state and a reset state along a first direction;

an air inlet and outlet valve device (180), the air inlet and outlet valve device (180) being connected to the air guide end (173), the air inlet and outlet valve device (180) having a valve air inlet (181) and a valve air outlet (182), the valve air inlet (181) being in communication with the outside atmosphere, the valve air outlet (182) being in communication with the cooking space,

wherein one of the closed end (172) and the transmission (160) is provided with a through opening (174), and the other of the closed end (172) and the transmission (160) is provided with a connecting shaft, the connecting shaft extends through the through opening (174), and the connecting shaft and the through opening (174) are in interference fit.

2. The cooking appliance according to claim 1, wherein the transmission means (160) comprises an eccentric (161) and an eccentric connecting rod (162) connected to the eccentric (161), the eccentric (161) being connected to the electric drive unit (151), the eccentric connecting rod (162) being connected to the closed end (172).

3. The cooking appliance according to claim 2, wherein the eccentric link (162) includes the connecting shaft, the through opening (174) is provided at the closed end (172), and the through opening (174) extends in a second direction perpendicular to the first direction.

4. The cooking appliance according to claim 3, wherein the connecting shaft includes a shaft body (164a) having a circular cross section and positioning keys (164b) connected to opposite ends of the shaft body (164a) in a radial direction of the shaft body (164a), the through opening (174) includes a shaft hole (174a) having a circular cross section and positioning holes (174b) provided at opposite ends of the shaft hole in the radial direction of the shaft hole, the shaft body (164a) is engaged with the shaft hole (174a), and the positioning keys (164b) are engaged with the positioning holes (174 b).

5. The cooking appliance according to claim 4, wherein a cross-sectional diameter Φ 2 of the shaft body (164a) is larger than a cross-sectional diameter Φ 1 of the shaft hole (174a), and 1mm ≦ Φ 2- Φ 1 ≦ 2 mm.

6. The cooking appliance according to claim 4, wherein a radial maximum distance between the positioning keys (164b) is greater than a radial maximum distance between the positioning holes (174 b).

7. The cooking appliance according to claim 2, wherein said eccentric link includes said through opening (174), said closed end (172) includes said connecting shaft, and said through opening (174) extends in said first direction.

8. The cooking appliance according to claim 7 wherein said closed end (172) further comprises a stop (172b) connected at an end of said connecting shaft opposite said flexible cavity, said stop having a circumferential flange (172c) projecting radially outward relative to said connecting shaft.

9. The cooking appliance according to claim 7, characterized in that the axial dimension of the connecting shaft in the first direction is smaller than or equal to the axial dimension of the through opening (174) in the first direction and/or in that the cross section of the connecting shaft and the through opening (174) is circular, the cross-sectional diameter of the connecting shaft being larger than the cross-sectional diameter of the through opening (174).

10. 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.

11. The cooking appliance of claim 10 wherein said corrugated structure includes n wave peak configurations, wherein 2 ≦ n ≦ 8.

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

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

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