CN216822988U

CN216822988U - Cooking utensil

Info

Publication number: CN216822988U
Application number: CN202123325677.7U
Authority: CN
Inventors: 朱泽春; 金恩来; 张雪岩; 章佳奇
Original assignee: Joyoung Co Ltd
Current assignee: Joyoung Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-28
Anticipated expiration: 2031-12-27

Abstract

The utility model relates to a cooking utensil. The cooking cavity of the existing cooking utensil cannot be maintained in a micro-pressure state. The utility model discloses an interior casing of establishing the culinary art chamber, culinary art chamber top is equipped with hot-blast chamber, hot-blast intracavity is equipped with hot-blast subassembly, and the hot-blast input culinary art chamber that hot-blast subassembly produced eats the material in order to make the ripe, be equipped with the exhaust subassembly that leads to with the culinary art chamber in the casing, be equipped with the cushion chamber in the exhaust subassembly, the air of culinary art intracavity passes through the cushion chamber and discharges to external space to make the culinary art chamber be in the minute-pressure state that atmospheric pressure is higher than external space atmospheric pressure. Set up the cushion chamber in exhaust assembly, the culinary art intracavity air current outwards discharges through the cushion chamber, and the culinary art chamber forms the micro-pressure state that atmospheric pressure is greater than external space atmospheric pressure through the carminative resistance of exhaust assembly through the increase, effectively promotes culinary art efficiency, promotes to use and experiences.

Description

Cooking utensil

Technical Field

The utility model relates to a food processing field, concretely relates to cooking utensil.

Background

The existing cooking appliance comprises a shell internally provided with a cooking cavity, wherein a hot air cavity is arranged at the top of the cooking cavity, a hot air assembly is arranged in the hot air cavity, and hot air generated by the hot air assembly is input into the cooking cavity to cook food materials. Be equipped with the exhaust subassembly on the culinary art chamber, because the windage in the exhaust subassembly is less, lead to culinary art intracavity atmospheric pressure and external space atmospheric pressure to tend to the same, be unfavorable for eating the material culinary art, influence and use experience.

SUMMERY OF THE UTILITY MODEL

In order to solve the not enough of prior art, the utility model provides a cooking utensil slows down the velocity of flow of the outer air current of culinary art intracavity through set up the cushion chamber in exhaust subassembly, and then forms the micropressure state at the culinary art intracavity, does benefit to the edible material culinary art, promotes to use and experiences.

The utility model discloses a following mode realizes: the utility model provides a cooking utensil, establishes the casing in the culinary art chamber in including, culinary art chamber top is equipped with hot-blast chamber, hot-blast intracavity is equipped with hot-blast subassembly, and hot-blast input cooking chamber that hot-blast subassembly produced is in order to make cooked food material, be equipped with the exhaust subassembly that leads to with the culinary art chamber in the casing, be equipped with the cushion chamber in the exhaust subassembly, the air of culinary art intracavity passes through the outside space emission of cushion chamber to make the culinary art chamber be in the minute-pressure state that atmospheric pressure is higher than outside space atmospheric pressure. Set up the cushion chamber in the exhaust subassembly, the culinary art intracavity air current outwards discharges through the cushion chamber, and the culinary art chamber forms the micropressure state that atmospheric pressure is greater than external space atmospheric pressure through the carminative resistance of exhaust subassembly through the increase, effectively promotes culinary art efficiency, promotes to use and experiences.

Preferably, the exhaust assembly is arranged at the top of the cooking cavity, the bottom of the buffer cavity is communicated with the cooking cavity through a lower through hole, and the top of the buffer cavity is communicated with the external space through an upper through hole, so that air in the cooking cavity vertically penetrates through the buffer cavity and is discharged outside. Exhaust assembly sets up at the culinary art chamber top, prevents that culinary art intracavity from eating material and liquid and passing through exhaust assembly and outwards spraying, ensures safe in utilization. Go up the through-hole and can effectively restrict airflow with lower through-hole, and then promote culinary art intracavity atmospheric pressure, can also block to eat the material and outwards spout.

Preferably, the exhaust assembly comprises an exhaust pipe which is vertically arranged, a lower plate provided with the lower through hole is arranged in the middle of the exhaust pipe, an upper plate provided with the upper through hole is arranged at the top of the exhaust pipe, and the buffer cavity is formed by the section of the exhaust pipe between the upper plate and the lower plate. The flowing distance of the air flow in the buffer cavity is increased by increasing the distance between the upper through hole and the lower through hole, and then the cooking cavity is ensured to be stably maintained in a micro-pressure state by increasing the wind resistance.

Preferably, a valve plate capable of being adjusted in a lifting mode is arranged below the lower plate, and the valve plate can be switched between a blocking state for blocking the lower through hole and an idle state separated from the lower plate in a lifting mode. The on-off state of the lower through hole is controlled through the lifting valve plate, so that the air pressure in the cooking cavity is adjustable, and the cooking requirement of food materials is met.

Preferably, the bottom section of the exhaust pipe forms a guide channel for lifting the valve plate, a vertical guide rib is arranged on the inner side wall of the guide channel, a notch is formed in the side edge of the valve plate, and the notch is sleeved on the guide rib, so that the valve plate can be lifted vertically in a horizontal posture. The guide channel plays the guide effect to the valve plate lift, ensures that the valve plate can remove and the shutoff through-hole down along predetermineeing the route, prevents that the valve plate from taking place unable circumstances of going up and down because of putting with blast pipe bottom section card, ensures valve plate lift reliability. The valve plate is slidably sleeved on the guide rib through the notch, so that the valve plate is ensured to lift along a preset path, the valve plate is also ensured to keep a preset posture, and the sealing reliability of the valve plate in the process of plugging the lower through hole is improved.

Preferably, an electromagnetic switch is arranged on the lower plate, the valve plate is a magnetic suction plate, and magnetic force generated by the electromagnetic switch drives the valve plate to rise and switch to a plugging state. The electromagnetic switch attracts the valve plate by generating magnetic force, so that the valve plate can rise under the action of the magnetic force to block the lower through hole, and can fall back by utilizing self gravity after the magnetic force disappears to open the lower through hole, thereby effectively controlling the on-off state of the lower through hole.

Preferably, the electromagnetic switches are arranged in the middle of the lower plate, and the lower through holes are multiple and are arranged around the electromagnetic switches in a separated mode. The electromagnetic switch arranged in the middle of the lower plate can attract the middle of the valve plate, so that the valve plate is ensured to stably lift in a horizontal posture, and the sealing reliability is further improved.

Preferably, the top surface of the valve plate is provided with a plug body which can be inserted into the corresponding lower through hole. When the valve plate rises and is attached to the lower plate, the plug body is inserted into the lower through hole from bottom to top, so that the lower through hole is sealed and plugged by the plug body.

Preferably, a liftable buffer ball is arranged in the buffer cavity, and when the air pressure in the cooking cavity is higher than the air pressure in the buffer cavity, the buffer ball can be lifted and switched from a blocking state of the lower blocking through hole to a suspended state of the lower separating through hole under the blowing of the air flow. The buffer ball falls down by utilizing the gravity of the buffer ball and seals the lower through hole, so that the pressure in the cooking cavity rises and is stably maintained in a micro-pressure state. When the air pressure in the cooking cavity exceeds the preset value, the buffer ball can be separated from the lower through hole due to the increase of the air pressure in the cooking cavity, so that the air pressure in the cooking cavity falls and is maintained in a micro-pressure state.

Preferably, the periphery of the upper port of the lower through hole is provided with a guide ring, so that the bottom of the buffer ball slides inwards along the guide ring to seal the lower through hole. The guide ring plays the effect of guide to the buffering ball in, ensures that the bottom of buffering ball can seal shutoff lower through-hole.

Preferably, the diameter of the lower through hole is smaller than that of the buffer ball, so that the buffer ball is prevented from being separated from the buffer cavity through the lower through hole, the buffer ball is ensured to completely cover the lower through hole by utilizing the bottom surface, and the sealing reliability is ensured.

Preferably, the upper through holes are divided on the top wall of the buffer cavity, and the axes of the upper through holes are inclined backwards from bottom to top so as to form an exhaust area at the rear part of the shell. Go up the through-hole and be used for arranging the interior air current of buffer chamber outward, go up the axis of through-hole and incline the setting backward for the air current can be discharged to the exhaust area at casing rear portion by last through-hole guide in the buffer chamber, prevents to take place to scald the condition of user.

The utility model has the advantages that: set up the cushion chamber in the exhaust subassembly, the culinary art intracavity air current outwards discharges through the cushion chamber, and the culinary art chamber forms the micropressure state that atmospheric pressure is greater than external space atmospheric pressure through the carminative resistance of exhaust subassembly through the increase, effectively promotes culinary art efficiency, promotes to use and experiences.

Drawings

FIG. 1 is a schematic cross-sectional view of a cooking appliance according to an embodiment;

FIG. 2 is a schematic cross-sectional view of an exhaust assembly according to a second embodiment;

FIG. 3 is a schematic cross-sectional view of an exhaust assembly according to a third embodiment;

FIG. 4 is a schematic structural view of a valve plate according to the third embodiment;

FIG. 5 is a schematic cross-sectional view of an exhaust assembly according to an embodiment;

in the figure: 1. the cooking device comprises a shell, 11, a cooking cavity, 2, an exhaust assembly, 21, a buffer cavity, 22, a lower plate, 221, a lower through hole, 222, a guide ring, 23, an upper plate, 231, an upper through hole, 24, an exhaust pipe, 25, a valve plate, 251, a notch, 252, a plug body, 26, a guide rib, 27, an electromagnetic switch, 28 and a buffer ball.

Detailed Description

The essential features of the invention will be further explained below with reference to the drawings and the detailed description of the invention.

The first embodiment is as follows:

the present embodiment provides a cooking appliance.

A cooking utensil as shown in fig. 1, by establishing the casing 1 of culinary art chamber 11 in and constitute, culinary art chamber 11 top is equipped with hot-blast chamber, hot-blast intracavity is equipped with hot-blast subassembly, and hot-blast input culinary art chamber 11 that hot-blast subassembly produced is with the cooked food material, be equipped with the exhaust subassembly 2 that leads to with culinary art chamber 11 in the casing 1, be equipped with cushion chamber 21 in the exhaust subassembly 2, the air in the culinary art chamber 11 passes through cushion chamber 21 and discharges to external space to make culinary art chamber 11 be in the minute-pressure state that the atmospheric pressure is higher than external space atmospheric pressure.

In this embodiment, cooking utensil includes the base, sets up the culinary art subassembly on the base and with culinary art subassembly complex hot-blast chamber, be equipped with culinary art chamber 11 in the culinary art subassembly, hot-blast intracavity is equipped with hot-blast subassembly, and the heat input culinary art chamber 11 that the hot-blast subassembly circular telegram produced to it is cooked by the heating to make edible material in the culinary art chamber 11.

In this embodiment, hot-blast subassembly includes fan and heating tube, and the heating tube is located the fan periphery, and the fan extracts 11 interior air of culinary art chamber and forms the air current that flows through the heating tube, and the air current flows through the heating tube and absorbs the heat and form the hot-blast to the 11 backward flows of culinary art chamber, and hot-blast meeting is with eating the material contact and realize the heat transfer after flowing into culinary art chamber 11 to make the edible material by outside-in gradually cooked. The hot air can be in contact with the food materials, the temperature of the hot air is reduced, and the hot air is diffused into the cooking cavity 11, so that an air source is provided for being extracted and heated again by the hot air assembly, and the air is circularly extracted and heated to improve the heat utilization efficiency.

When the cooking device is used, firstly, food materials are put into the cooking cavity 11, then the cooking cavity 11 is sealed, the cooking cavity 11 is isolated from the external space and communicated with the hot air cavity, finally, hot air is generated through the hot air assembly, and the hot air is input into the cooking cavity 11 so that the food materials are heated and cooked.

In the present embodiment, the casing 1 is provided with an exhaust assembly 2, and the exhaust assembly 2 is bridged between the cooking cavity 11 and the external space. During the use, liquid and the interior moisture of food material can form steam because of being heated in the culinary art chamber 11, lead to the culinary art chamber 11 in the air can be because of atmospheric pressure rises and arrange outward through exhaust assembly 2, ensure to cook safely. Because exhaust assembly 2's windage is less, lead to culinary art intracavity gas pressure to be close with external gas pressure all the time, the culinary art intracavity 11 interior edible material can influence culinary art efficiency because of culinary art intracavity gas pressure is lower, influence to use and experience. For this reason, set up buffer chamber 21 in exhaust subassembly 2, outer row after buffer chamber 21 need flow through of outer air current of arranging in the culinary art chamber 11, make culinary art chamber 11 need just can order about the air current to flow through buffer chamber 21 after accumulating higher atmospheric pressure outer row, and then make culinary art chamber 11 can maintain the micropressure state that is higher than external atmospheric pressure for a long time, existing effect promotes culinary art efficiency, promote to use experiences, can also ensure that the internal gas pressure of culinary art chamber 11 maintains at the within range of predetermineeing, ensure safe in utilizationly.

In the present embodiment, the air pressure in the cooking cavity 11 is increased due to the wind resistance in the exhaust assembly 2, so that the cooking cavity 11 is stably maintained in the micro-pressure state. When culinary art chamber 11 is in the minute-pressure state, the cooking chamber 11 internal gas pressure is a little higher than the atmospheric pressure in predetermineeing the within range, can eat the material through promoting ambient pressure promotes the water source boiling point, and then promotes cooking efficiency, can also prevent to cook 11 internal gas pressures too high and have the potential safety hazard.

In the present embodiment, the exhaust assembly 2 with the buffer cavity 21 is suitable for various cooking devices with a sealed cooking cavity 11, such as an air fryer, an oven, a cooking machine, a soymilk machine, etc., to effectively improve cooking efficiency and ensure cooking safety, and should be regarded as a specific implementation manner of the present embodiment.

Example two:

compared with the first embodiment, the present embodiment provides a specific cooking appliance.

As shown in fig. 2, the exhaust assembly 2 is disposed at the top of the cooking cavity 11, the bottom of the buffer cavity 21 is communicated with the cooking cavity 11 through a lower through hole 221, and the top is communicated with the external space through an upper through hole 231, so that the air in the cooking cavity 11 vertically passes through the buffer cavity 21 and is discharged outside.

When the cooking device is used, air flowing out of the cooking cavity 11 needs to sequentially pass through the lower through hole 221, the buffer cavity 21 and the upper through hole 231 and then flows into the external space, the upper through hole 231 and the lower through hole 221 are respectively arranged on the top wall and the bottom wall of the buffer cavity 21, the length of a flow path of air flow in the buffer cavity 21 is effectively increased, air pressure in the cooking cavity 11 is increased through improving wind resistance when the air flow flows through the buffer cavity 21, and food materials are guaranteed to be cooked quickly.

In this embodiment, the exhaust assembly 2 includes an exhaust pipe 24 vertically disposed, a lower plate 22 disposed in the middle of the exhaust pipe 24 and provided with the lower through hole 221, an upper plate 23 disposed in the top of the exhaust pipe and provided with the upper through hole 231, and the exhaust pipe 24 is located between the upper plate 23 and the lower plate 22 to form the buffer chamber 21. The exhaust pipe 24 is inserted on the housing 1 in an axial vertical posture, which not only facilitates production and assembly, but also ensures smooth gas path. An upper plate 23 and a lower plate 22 are provided in the exhaust pipe 24, and a buffer chamber 21 is formed by enclosing the inner side walls of the upper plate 23, the lower plate 22 and the exhaust pipe 24.

In this embodiment, the diameter of the lower through hole 221 is smaller than the radius of the exhaust pipe 24, so as to increase the wind resistance when the airflow flows through by reducing the diameter of the lower through hole 221, and further increase the air pressure required by the cooking cavity 11 when the airflow is discharged outside through the exhaust assembly 2, thereby ensuring that the food material can be cooked quickly in a higher temperature environment.

In this embodiment, the upper through holes 231 are plural and are separately provided on the top wall of the buffer chamber 21, and the axis of the upper through holes 231 is inclined rearward from bottom to top to form an exhaust region at the rear of the housing 1. The efficiency of the air flow in the buffer chamber 21 is improved by providing a plurality of upper through holes 231, thereby providing a space for subsequently receiving the air flow from the cooking chamber 11. The lower port axis of the upper through hole 231 is vertically arranged, and the upper port axis is obliquely inclined from bottom to top and is used for guiding high-temperature airflow to be conveyed to an exhaust area behind the shell 1, so that the condition that a user is scalded due to contact with the high-temperature airflow is effectively prevented, and the use safety is ensured.

Other structures and effects of the cooking appliance in the embodiment are consistent with those of the embodiment, and are not described again.

Example three:

compared with the second embodiment, the present embodiment provides another cooking apparatus structure.

As shown in fig. 3, a valve plate 25 that can be adjusted in a lifting manner is provided below the lower plate 22, and the valve plate 25 can be switched in a lifting manner between a blocking state for blocking the lower through hole 221 and an idle state for disengaging from the lower plate 22. The valve plate 25 is disposed under the lower plate 22 so as to be movable up and down, so that the valve plate 25 can be switched between a closed state in which the lower through hole 221 is closed by the cover and an idle state in which the valve plate is separated from the lower plate 22.

In the using process, when the valve plate 25 is in an idle state, the valve plate 25 is positioned below the lower plate 22 and is not contacted with each other, the valve plate 25 is provided with an air delivery hole which is arranged in a staggered manner with the vertical projection of the lower through hole, after the air pressure in the cooking cavity 11 rises, the air flow passes through the air delivery hole, passes over the valve plate 25 and enters the buffer cavity 21 after passing through the lower through hole 221, and the air pressure in the cooking cavity 11 is effectively reduced; when the valve plate 25 rises and is switched to the blocking state, the valve plate 25 is attached to the bottom surface of the lower plate 22 and blocks the lower through hole 221 through the plug body 252, the air pressure in the cooking cavity 11 rises due to the fact that air flow cannot be discharged through the exhaust assembly 2, and then the cooking efficiency is improved by improving the boiling point of a water source. When the air pressure in the cooking cavity 11 exceeds a preset value, the valve plate 25 falls from the blocking state to the idle state, and the air pressure in the cooking cavity 11 is reduced due to the outward discharge of the air flow, so that the use safety is ensured.

In this embodiment, an electromagnetic switch 27 is disposed on the lower plate 22, the valve plate 25 is a magnetic attraction plate, and a magnetic force generated by the electromagnetic switch 27 drives the valve plate 25 to rise and switch to the blocking state. The electromagnetic switch 27 is electrified to generate magnetic force and attract the valve plate 25 below upwards, so that the valve plate 25 is switched from an idle state to a blocking state; when the electromagnetic switch 27 is powered off, the magnetic force disappears, and the valve plate 25 falls from the blocking state to the idle state under the action of the gravity of the valve plate. The valve plate 25 is controlled to move up and down by the power-on and power-off operation of the electromagnetic switch 27, thereby ensuring that the air pressure in the cooking chamber 11 is maintained in a preset micro-pressure state. Because the valve plate 25 can be lifted and lowered controllably, the specific air pressure range in the micro-pressure state can be changed, and the requirements of cooking different food materials are met.

In the present embodiment, the electromagnetic switch 27 is disposed in the middle of the lower plate 22, so as to ensure that the magnetic force generated by the electromagnetic switch 27 is concentrated on the middle of the valve plate 25, and ensure that the valve plate 25 is lifted and lowered smoothly in a horizontal posture.

In this embodiment, the lower through holes 221 are multiple and are separately arranged around the electromagnetic switch 27, and the top surface of the valve plate 25 is provided with a plug body 252 (as shown in fig. 4) capable of being inserted into the corresponding lower through hole, so that the plug body 252 is conveniently plugged and blocked, the middle part of the valve plate 25 is ensured to be flat, and the suction reliability is ensured. The diameter of the plug body 252 is matched with the diameter of the lower through hole 221, the thickness of the plug body 252 is matched with the axial distance of the lower through hole 221, and after the plug body 252 is inserted in place, the outer side wall of the plug body 252 is matched and attached with the inner side wall of the lower through hole 221, so that the sealing performance of plugging is effectively improved.

In this embodiment, the bottom section of the exhaust pipe 24 forms a guide channel for the valve plate 25 to lift, a vertical guide rib 26 is arranged on the inner side wall of the guide channel, a notch 251 is formed on the side edge of the valve plate 25, and the notch 251 is sleeved on the guide rib 26, so that the valve plate 25 can lift vertically in a horizontal posture. The two guide ribs 26 are respectively arranged on two opposite inner side walls of the guide channel, and the notch 251 is sleeved on the corresponding guide rib 26 and ensures that the valve plate 25 stably ascends and descends in a horizontal posture.

Other structures and effects of the cooking appliance in this embodiment are consistent with those in the second embodiment, and are not described again.

Example four:

As shown in fig. 5, a liftable buffer ball 28 is disposed in the buffer chamber 21, and when the air pressure in the cooking chamber 11 is higher than the air pressure in the buffer chamber 21, the buffer ball 28 can be lifted and switched from a blocking state for blocking the lower through hole 221 to a floating state for separating from the lower through hole 221 by blowing the air flow. The buffering ball 28 blocks the lower through hole 221 by its own weight, so that the cooking chamber 11 needs to blow the buffering ball 28 upward away from the lower through hole 221 by increasing the air pressure therein, thereby maintaining the air pressure in the cooking chamber 11 in a micro-pressure state.

Specifically, the buffer ball 28 blocks the lower through hole 221 by its own weight, so that the air pressure in the cooking chamber 11 is maintained in a minute pressure state. When the air pressure in the cooking cavity 11 rises, the air flow can be discharged outwards after driving the buffer ball 28 to be separated from the lower through hole 221 upwards, the buffer ball 28 is discharged outwards in the air flow in the cooking cavity 11, and falls off and blocks the lower through hole 221 again after the air pressure drops, so that the cooking cavity 11 is ensured to be stably maintained in a micro-pressure state.

In this embodiment, the periphery of the upper port of the lower through hole 221 is provided with the guide ring 222, so that the bottom of the cushion ball 28 slides inwards along the guide ring 222 and blocks the lower through hole 221, and the diameter of the lower through hole 221 is smaller than that of the cushion ball 28, which not only can guide the cushion ball 28, ensure that the center of the cushion ball 28 coincides with the axis of the lower through hole 221, ensure that the cushion ball 28 is supported by the periphery of the upper port of the lower through hole, and ensure that the sealing reliability can be improved by increasing the contact area between the periphery of the upper port of the lower through hole and the surface of the cushion ball 28.

Claims

1. The utility model provides a cooking utensil, establishes the casing in the culinary art chamber in including, culinary art chamber top is equipped with hot-blast chamber, hot-blast intracavity is equipped with hot-blast subassembly, and hot-blast input culinary art chamber that hot-blast subassembly produced is in order to make cooked food material, a serial communication port, be equipped with the exhaust subassembly that leads to with the culinary art chamber in the casing, be equipped with the cushion chamber in the exhaust subassembly, the air of culinary art intracavity passes through the cushion chamber and outwards discharges in the space to make the culinary art chamber be in the minute-pressure state that atmospheric pressure is higher than external space atmospheric pressure.

2. The cooking appliance according to claim 1, wherein the exhaust assembly is disposed at the top of the cooking cavity, the bottom of the buffer cavity is communicated with the cooking cavity through a lower through hole, and the top of the buffer cavity is communicated with the external space through an upper through hole, so that air in the cooking cavity vertically passes through the buffer cavity and is discharged outside.

3. The cooking appliance according to claim 2, wherein the exhaust assembly comprises an exhaust pipe arranged vertically, a lower plate provided with the lower through hole is arranged in the middle of the exhaust pipe, an upper plate provided with the upper through hole is arranged at the top of the exhaust pipe, and the buffer cavity is formed by the section of the exhaust pipe between the upper plate and the lower plate.

4. The cooking appliance according to claim 3, wherein a valve plate is provided under the lower plate and can be adjusted in a lifting manner, and the valve plate can be switched between a blocking state for blocking the lower through hole and an idle state separated from the lower plate in a lifting manner.

5. The cooking appliance according to claim 4, wherein the bottom section of the exhaust pipe forms a guide channel for lifting the valve plate, a vertical guide rib is arranged on the inner side wall of the guide channel, a notch is formed on the side edge of the valve plate, and the notch is sleeved on the guide rib, so that the valve plate is lifted vertically in a horizontal posture.

6. The cooking utensil of claim 4, wherein the lower plate is provided with an electromagnetic switch, the valve plate is a magnetic attraction plate, and the magnetic force generated by the electromagnetic switch drives the valve plate to rise and switch to the blocking state.

7. The cooking utensil of claim 6, wherein the electromagnetic switch is arranged in the middle of the lower plate, and the plurality of lower through holes are distributed around the electromagnetic switch; or the top surface of the valve plate is provided with a plug body which can be inserted into the corresponding lower through hole.

8. The cooking utensil as claimed in claim 3, wherein the buffer chamber has a liftable buffer ball therein, and when the air pressure in the cooking chamber is higher than the air pressure in the buffer chamber, the buffer ball can be lifted and switched from a blocking state for blocking the lower through hole to a suspending state for separating from the lower through hole under the blowing of the air flow.

9. The cooking utensil of claim 8, wherein the lower through hole is provided with a guide ring at the periphery of the upper port, so that the bottom of the buffer ball slides inwards along the guide ring and blocks the lower through hole; or the diameter of the lower through hole is smaller than that of the buffer ball.

10. The cooking appliance according to any one of claims 2 to 9, wherein the upper through holes are plural and are provided on the top wall of the buffer chamber, and the axis of the upper through holes is inclined rearward from bottom to top to form an exhaust region at the rear of the housing.