CN220205707U - Cooking utensil - Google Patents

Abstract

The utility model relates to the technical field of kitchen appliances, in particular to a cooking appliance, which comprises a body, wherein a cooking cavity is formed in the body; the steam generation device is arranged at the bottom of the cooking cavity and comprises an evaporation disc and a steam ejection port, and the steam ejection port is arranged above the evaporation disc and is positioned in the cooking cavity; and the turbulence piece comprises a rotating shaft and a top cover arranged on the rotating shaft and relatively far away from one end of the steam spraying port, the rotating shaft is rotatably arranged on the steam spraying port, when steam generated by the evaporation tray is sprayed upwards through the steam spraying port, the turbulence piece is pushed to rotate, and the cooking cavity of the cooking appliance is provided with the turbulence piece capable of rotating automatically, so that the thermal uniformity in the cooking cavity is obviously improved.

Description

Cooking utensil

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a cooking utensil.

Background

With the improvement of living standard, various kitchen appliances such as steamer, whole box, steaming oven and the like appear. The kitchen appliances are all heat sources for curing food materials by using hot steam, so that the kitchen appliances often comprise a steam generating device for generating the hot steam in a structure. The steam outlet of the steam generating device inputs steam into the cooking cavity so as to cook food materials in the cooking cavity.

However, the steam output from the steam generating device is often directed in a specific direction, for example, the steam generating device of the steamer is usually directed vertically upwards, so that the food material near the steam outlet in the cooking cavity is cured faster due to first contacting with hot steam, while the food material far from the steam outlet is contacted with steam for a relatively long time, and even cannot be cured thoroughly due to insufficient contact with hot steam, and the uniformity of the heat in the whole cooking cavity is poor.

Disclosure of Invention

In view of the above, it is necessary to provide a cooking appliance having a cooking cavity provided with a spoiler capable of self-rotating, so that thermal uniformity in the cooking cavity is significantly improved.

A cooking appliance, the cooking appliance comprising:

a body having a cooking cavity formed therein;

the steam generation device is arranged at the bottom of the cooking cavity and comprises an evaporation disc and a steam ejection port, and the steam ejection port is arranged above the evaporation disc and is positioned in the cooking cavity; the method comprises the steps of,

the vortex piece comprises a rotating shaft and a top cover arranged on the rotating shaft and relatively far away from one end of the steam ejection port, the rotating shaft is rotatably arranged in the steam ejection port, and steam generated by the evaporation tray pushes the vortex piece to rotate when upwards ejected through the steam ejection port.

In the cooking utensil, the steam generating device is arranged at the bottom of the cooking cavity, the steam spraying opening is positioned in the cooking cavity, so that steam generated by the evaporating disc can impact the turbulence piece from bottom to top when being sprayed upwards through the steam spraying opening, the turbulence piece is driven to rotate in the cooking cavity, the steam flow is led to diffuse all around, and compared with the mode that steam is directly sprayed out through the steam spraying opening, the additionally-arranged turbulence piece can enable food materials in the cooking cavity to be heated more uniformly. Meanwhile, the turbulence piece directly uses steam air flow sprayed out of the steam spraying port as a power source, and structures such as a motor and the like are not required to be introduced to drive the turbulence piece to rotate, so that the whole cooking utensil structure is prevented from being complicated. In addition, the rotation of the turbulence piece not only can change the direction of steam flow sprayed out of the steam spraying port, but also can stir the gas in the cooking cavity to a certain extent, so that the overall temperature in the cooking cavity tends to be uniform.

In one embodiment, the spoiler further comprises a top cover arranged on the upper portion of the rotating shaft and located above the steam spraying opening, the bottom surface of the top cover is a flow blocking surface, a plurality of spoiler ribs are circumferentially arranged on the flow blocking surface at intervals, the spoiler ribs are arranged in a central symmetry mode and perpendicular to the plane of the rotating shaft, orthographic projections of the spoiler ribs and radial lines of the orthographic projections of the top cover are arranged in an included angle mode, and therefore upward sprayed steam can generate tangential force for pushing the spoiler to rotate when impacting the spoiler ribs.

So set up, from steam jet outlet spun steam flow can apply a rotatory tangential force of promotion for the vortex muscle through the vortex muscle for the vortex piece can rotate in the culinary art intracavity under steam flow effect, and steam is finally spouted the food to the culinary art intracavity from a plurality of steam outlet on the top cap, and steam outlet constantly changes along with the rotation of vortex piece and circumference position, finally makes steam jet outlet internal spun steam flow be guided to the diffusion all around, thereby makes the food in the culinary art intracavity can be more even be heated.

In one embodiment, steam outlets are formed in the top cover at regions corresponding to between adjacent spoiler ribs.

The arrangement can further homogenize the steam in the cooking cavity by dispersing the steam from the steam dispersing port on the top cover after the steam is stirred by the turbulence ribs.

In one embodiment, the top cover is provided as a spherical shell-like structure, or alternatively, the top cover is provided as a flat plate-like structure.

When the spherical shell-shaped structural member is used as the top cover, the flow blocking surface opposite to the airflow sprayed by the steam spraying port is formed into an arc-shaped surface, so that condensed water formed by condensing steam on the flow blocking surface can flow down more easily, and the phenomenon that the weight of the turbulence member is increased due to the fact that the steam stays on the turbulence member is avoided; meanwhile, the air flow sprayed upwards from the steam spraying port firstly impacts the flow blocking surface, and the contact area between the arc-shaped flow blocking surface and the steam air flow can be increased, so that the steam air flow can be jacked up and rotated by overcoming the gravity of the turbulence piece more easily. The whole top cover is arranged to be a spherical shell-shaped structural member, so that the thickness of the whole spoiler is relatively uniform, and the problem of overlarge local thickness caused by the adoption of an arc-shaped surface locally is avoided. When the baffle surface is arranged to be a plane, the structure of the whole spoiler can be simplified, and when the whole top cover adopts a flat plate-shaped structural member, the structural design and processing of the spoiler can be further simplified.

In one embodiment, the orthographic projection of the spoiler on the plane perpendicular to the rotating shaft is in a straight line or an arc along the axial direction of the rotating shaft.

So set up, the vortex muscle can be better rotatory under the drive of steam air current.

In one embodiment, the diameter D of the vapor vent is not greater than the outer diameter D of the cap.

By the arrangement, the top cover can be ensured to completely cover the whole steam spraying outlet, so that the spraying direction of all steam air flows can be changed by the turbulence piece. And simultaneously, the spoiler can obtain the maximum rotation power.

In one embodiment, the steam generating device comprises a top plate, and the steam outlet is arranged on the top plate; the rotating shaft comprises an insertion part capable of penetrating through the steam ejection opening and being inserted below the top plate, and a limiting part arranged between the top cover and the insertion part, wherein in an assembled state, the limiting part is positioned above the top plate and cooperates with the insertion part to limit the axial position of the spoiler relative to the top plate.

The insertion part and the limiting part are matched, so that the spoiler has a certain axial position relative to the top plate of the steam generating device, and the spoiler can rotate at a preset position stably under the driving of steam airflow.

In one embodiment, a first protrusion for reducing a contact area between the top plate and the insertion portion is provided on a lower surface of the top plate or the insertion portion; and/or the number of the groups of groups,

the upper surface of roof or be provided with on the spacing portion be used for reducing the roof with the area of contact between the spacing portion is protruding.

So set up, first protruding and second protruding contact form between can make spoiler and the roof is close the line contact, compares in the form of face contact, and frictional force between the two is reduced, and the spoiler can be under the drive of steam air current more smooth and easy rotation.

In one embodiment, the insert comprises at least two elastic catches, at least two of which are capable of being elastically folded when passing through the vapor-jet orifice and of springing back after passing through the vapor-jet orifice.

So set up, the form of drawing in, the resilience of elasticity buckle can make the insert portion smoothly pass the steam jet on the roof and connect both steadily, and overall structure is comparatively simple, connects the reliability height.

In one embodiment, the spoiler is provided as an integral piece.

The arrangement is beneficial to simplifying the processing of the turbulence piece and the assembly between the turbulence piece and the steam generating device.

In one embodiment, the rotating shaft is rotatably installed at the steam ejection port along the vertical direction.

The rotary shaft is arranged in the vertical direction, so that the steam airflow spraying direction is overlapped with the gravity direction of the turbulence piece, and the turbulence piece can be driven to rotate better under the driving of the steam airflow.

In one embodiment, the mass m of the spoiler satisfies the following formula:

wherein: n is the heating efficiency of a heating element in the steam generating device;

p ₀ heating power for a heating element in the steam generating device;

s is the opening area of the steam jet outlet;

lambda is the resistance coefficient of the steam ejection port;

r is the latent heat of vaporization of water.

So set up, when designing the spoiler structure, can directly calculate the biggest spoiler quality of permission according to above-mentioned formula for instruct the structure setting of spoiler, so can guarantee that the spoiler can be blown and stably rotate by the steam air current.

Drawings

Fig. 1 is a schematic view of a cooking appliance according to an embodiment of the present utility model;

FIG. 2 is an assembly view of a steam generator and spoiler of an embodiment;

fig. 3 is an enlarged view of a portion a of fig. 2;

FIG. 4 is a schematic view of a spoiler according to an embodiment;

FIG. 5 is another view of the spoiler of FIG. 4;

fig. 6 is a schematic structural view of a part of the structure of the cooking appliance, showing the related structure of the top plate and the steam spouting port thereon.

Reference numerals:

100. a body; 11. a cooking cavity;

200. a spoiler; 21. a rotating shaft; 211. an insertion section; 212. a limit part; 22. a top cover; 221. turbulence ribs; 222. a flow blocking surface; 223. a steam outlet;

300. a steam generating device; 31. an evaporation pan; 32. a heating member; 311. a steam ejection port; 3111. a steam outlet; 3112. an assembly port; 312. a top plate; 3121. a first protrusion; 3122. a second protrusion; 313. and a water inlet.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, a cooking apparatus according to an embodiment of the present utility model includes a main body 100, a spoiler 200, and a steam generating device 300, wherein: a cooking cavity 11 is formed in the body 100, and food materials to be heated and cured are placed in the cooking cavity 11.

The steam generating device 300 includes an evaporation pan 31 and a heating member 32, wherein: a steam spouting port 311 is provided on a top plate 312 of the evaporation pan 31, and the steam spouting port 311 is located in the cooking chamber 11 and serves to output steam generated in the evaporation pan 31 to the outside. In order to facilitate injection of water for generating steam into the evaporation pan 31 to ensure that the internal water level thereof is maintained at a preset value, the evaporation pan 31 may be further provided with a water inlet 313 communicating to an external water supply device.

As shown in connection with fig. 6 on the basis of fig. 1, in one embodiment, the steam outlet 311 may include a centrally located fitting 3112 and a plurality of steam outlets 3111 arcuately surrounding the fitting 3112. In other embodiments, the steam ejection port 311 may be provided with another orifice structure, as long as the steam generated in the evaporation tray 31 can be ejected outward.

As shown in fig. 3 to 5, the spoiler 200 includes a rotating shaft 21 and a top cover 22 disposed on the rotating shaft 21 at an end relatively far from the steam ejection opening 311. The rotation shaft 21 is rotatably installed in the fitting port 3112. A plurality of turbulators 221 are circumferentially spaced apart on a side of the top cover 22 facing the steam ejection outlet 311, and steam ejection outlets 223 are formed on the top cover 22 at regions corresponding to between adjacent turbulators 221.

All the turbulence ribs 221 are arranged in a central symmetry manner, and on a plane perpendicular to the rotating shaft 21, the orthographic projection of the turbulence ribs 221 and the radial line of the orthographic projection of the top cover 22 are arranged in an included angle, so that when the steam air flow sprayed out of the steam spraying outlet 311 upwards impacts the turbulence ribs 221, tangential force pushing the circumferential rotation of the turbulence ribs 221 can be generated, and the whole turbulence piece 200 can rotate in the cooking cavity 11. In one embodiment, the front projection of the spoiler 221 on the plane perpendicular to the rotating shaft 21 is in a straight line or an arc, so that the steam airflow can more easily rotate the spoiler 200.

In other embodiments, the steam outlet 223 may not be provided, and a lateral gap between adjacent turbulators 221 may be used as the steam outlet.

Compared with a mode in which the spoiler 200 is driven to rotate by a separate driving source, a mode in which the steam is ejected by the steam ejection port 311 as power can be omitted. In addition, the rotating shaft 21 of the spoiler 200 is installed at the steam jet outlet 311, so that the spoiler 200 is maximally close to the steam jet outlet, and thus the maximum kinetic energy is obtained. In contrast to the arrangement of the spoiler 200 in a separate steam channel, the spoiler 200 is directly arranged in the cooking cavity 11 to achieve a better spoiler effect. Moreover, the user can intuitively observe the working state of the spoiler 200 from the cooking cavity 11, and the visual effect is obviously improved.

As shown in fig. 4, in the radial direction of the rotating shaft 21, the flow-disturbing ribs 221 are spaced from the rotating shaft 21, the bottom surface of the top cover 22 is formed as a flow-blocking surface 222, and the steam flow ejected from the steam ejection port 311 first hits the flow-blocking surface 222 and flows toward the flow-disturbing ribs 221 on the outer periphery under the guidance of the flow-blocking surface 222, and after being guided by the flow-dividing direction of the gap between the flow-disturbing ribs 221, flows out from the steam-diffusing port 223 on the top cover 22.

The arrangement of the baffle surface 222 makes the steam flow forced to the turbulence rib 221 on the periphery of the steam flow, and the steam flow is split by the turbulence rib 221 and then flows out, so that the steam flow has better dispersing effect, and the uniformity of steam in the cooking cavity 11 is improved.

In one embodiment, the top cover 22 is configured as a spherical shell-like structure such that the baffle surface 222 is formed as an arcuate surface. Therefore, the steam flow can be more smoothly guided to the surrounding turbulence ribs 221, and meanwhile, when the hot steam contacts the baffle surface 222, some condensed water is inevitably generated, and the baffle surface 222 with an arc-shaped surface can make the condensed water flow down more easily, so that the weight of the turbulence member 200 is prevented from increasing due to the fact that the condensed water stays on the turbulence member 200.

Further, the baffle surface 222 is provided as an arc-shaped surface, which increases the contact area with the upward-sprayed air flow, thereby enabling the steam air flow to more easily lift and rotate the spoiler 200 against the gravity force thereof. The integral top cover 22 is made into a spherical shell-shaped structural member shown in fig. 3, and the turbulence ribs 221 are distributed on the inner arc surface of the spherical shell-shaped structural member. Such a direction may provide a relatively uniform thickness throughout the spoiler as compared to merely providing the baffle surface 222 as an arcuate surface.

In other embodiments, a flat plate-like structure may be used as the top cover 22. In this way, as with the spherical shell-shaped structural member as the top cover 22, the steam homogenizing function of the spoiler 200 can be realized, and the structural design is simplified.

In order to enable the spoiler 200 to fully utilize the steam flow as a motive force for its rotation and to ensure that as much of the flow of air ejected from the steam ejection opening 311 as possible is ejected through the steam ejection opening 223, the diameter D of the steam ejection opening 311 is not greater than the outer diameter D of the top cover 22. In this way, the cover 22 can be ensured to cover the entire steam ejection port 311.

As shown in fig. 2 and 3 in combination, the evaporation pan 31 includes a top plate 312, and the steam ejection port 311 is provided on the top plate 312, and correspondingly, the spoiler 200 is fixedly installed with respect to the top plate 312. The rotation shaft 21 includes an insertion portion 211 that can be inserted from the steam ejection port 311 to below the top plate 312, and a stopper portion 212 provided between the insertion portion 211 and the top cover 22, the stopper portion 212 being above the top plate 312 and the insertion portion 211 being below the top plate 312 in an assembled state, both together restricting the axial position of the spoiler 200 with respect to the top plate 312.

The air flow ejected from the steam ejection port 311 impacts the spoiler 200 in a direction away from the top plate 312, and the insertion portion 211 can restrict the spoiler 200 from being ejected from the steam ejection port 311 by the impact force; when the steam jet ports 311 do not jet the steam flow, the limiting portions 212 limit the whole spoiler 200 to approach the top plate 312. This allows the axial position between the spoiler 200 and the evaporation pan 31 to be relatively determined, so that the spoiler 200 can rotate in a relatively stable position.

As shown in fig. 3, in order to reduce the friction force at the time of relative rotation between the top plate 312 and the spoiler 200, the contact area between the two may be reduced by appropriate means. In one embodiment, a first protrusion 3121 is provided on the lower surface of the top plate 312 or the insertion portion 211, and a second protrusion 3122 may also be provided on the upper surface of the top plate 312 or the stopper portion 212.

The first protrusion 3121 and the second protrusion 3122 both encircle the steam ejection port 311, so that compared with the case where no protrusion is provided, the surface contact between the spoiler 200 and the top plate 312 is changed into the approximate loop line contact of the top of the protrusion, the contact area is greatly reduced, and therefore, the friction resistance generated by the contact is reduced when the spoiler 200 rotates, and the rotation thereof under the driving of the steam flow is smoother.

In the embodiment shown in fig. 3, the first and second protrusions 3121 and 3122 are each provided on the top plate 312, and in other embodiments, the first and second protrusions 3121 and 3122 may be provided on the rotation shaft 21.

In one embodiment, to facilitate the disassembly and assembly of the spoiler 200 and the top plate 312, the insertion portion 211 includes at least two elastic snaps, which elastically collapse to reduce the radial dimension of the insertion portion 211 when inserted into the steam ejection opening 311, so that the insertion portion 211 smoothly passes through, and after passing through, the elastic snaps rebound to expand the radial dimension of the insertion portion 211, thereby avoiding the spoiler 200 from being disconnected from the top plate 312.

The elastic buckle is easy to manufacture and assemble and disassemble, and is beneficial to simplifying the assembling and disassembling process of the spoiler 200 and the steam generating device 300. The spoiler 200 may be provided as a unitary, one-piece member, for example, integrally injection molded from a plastic material. Thus, the overall spoiler 200 is easier to machine, has higher overall strength, and facilitates more precise control of the weight of the spoiler 200.

Referring back to fig. 1, the steam generating device 300 may be provided at the bottom of the body 100, and the steam spouting holes 311 spouts the steam flow vertically upward, and the rotation shaft 21 is arranged in the vertical direction. In this way, the steam flow is ejected in the direction opposite to the gravity direction of the spoiler 200, and the steam flow can act on the spoiler 200 to the maximum extent. A cooking appliance such as an electric steamer is generally provided with the steam generating device 300 and the body 100 in the above-described relationship. In other embodiments, the cooking appliance may be other types of cooking appliances.

In order to ensure that the spoiler 200 can be blown up and stably rotated by the steam airflow, the mass m of the spoiler 200 should be controlled during design, and the following calculation process is performed:

the pressure f=p×s generated by the steam flow at the steam ejection port 311, where P is the pressure at the steam ejection port 311 and S is the opening area of the steam ejection port 311.

Further, the pressure P at the steam ejection port 311 and the heating power P of the heating member 32 ₀ In relation, the following relation is given between the Bernoulli equation and the latent heat of vaporization equation:

the conversion is carried out to obtain the following components:

wherein: v represents the volume of the steam generated in a unit time, and when the pressure is balanced, V is equal to the volume of the steam ejected from the steam ejection port 311;

r is the latent heat of vaporization of water;

ρ is the density of water vapor, 0.6kg/m ³ ；

λ is the resistance coefficient of the steam ejection port 311;

n is the heating efficiency of the heating element 32.

In order to ensure that the steam can support the turbulence piece 200, the gravity of the turbulence piece 200 and the pressure F generated by the steam flow meet mg less than or equal to F, the gravity is tied into the calculation formula of the converted P, and the value is taken into (wherein g is the gravity acceleration, and the value is 10m/s ² ) The following relationship is obtained:

the heating power p of the heating element 32 is used as follows ₀ The value of 2000W and the opening area S of the steam outlet 311 were 2×10 ^{- 4} m ² The value of the vaporization latent heat r is 2257kJ/kg, the resistance coefficient lambda is calculated according to the common material small hole value of 0.5 and the heating efficiency value of 0.9 of the heating element 32, and the mass of the turbulence element 200 is not more than 5.34g under the condition that the mass is obtained by taking the calculation formula of m.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (12)

1. A cooking appliance, the cooking appliance comprising:

a body (100), wherein a cooking cavity (11) is formed in the body (100);

the steam generation device (300), the steam generation device (300) is arranged at the bottom of the cooking cavity (11), the steam generation device (300) comprises an evaporation disc (31) and a steam ejection port (311), and the steam ejection port (311) is arranged above the evaporation disc (31) and is positioned in the cooking cavity (11); the method comprises the steps of,

the vortex piece (200), the vortex piece (200) includes pivot (21), pivot (21) rotatable install in steam jet (311), steam that evaporation dish (31) produced is via when steam jet (311) upwards spouts, promotes vortex piece (200) rotation.

2. The cooking appliance according to claim 1, wherein the turbulence member (200) further comprises a top cover (22) disposed on the upper portion of the rotating shaft (21) and located above the steam spraying opening (311), the bottom surface of the top cover (22) is a baffle surface (222), a plurality of turbulence ribs (221) are circumferentially arranged on the baffle surface (222) at intervals, the turbulence ribs (221) are arranged in a central symmetry manner, and on a plane perpendicular to the rotating shaft (21), an angle is formed between an orthographic projection of the turbulence ribs (221) and a radial line of the orthographic projection of the top cover (22), so that upward sprayed steam can generate tangential force pushing the turbulence member (200) to rotate when impacting the turbulence ribs (221).

3. Cooking appliance according to claim 2, wherein steam vents (223) are formed in the top cover (22) at regions corresponding to between adjacent turbulators (221).

4. Cooking appliance according to claim 2, wherein the top cover (22) is provided as a spherical shell-like structure or wherein the top cover (22) is provided as a flat plate-like structure.

5. Cooking appliance according to claim 2, wherein the orthographic projection of the spoiler rib (221) on a plane perpendicular to the rotation axis (21) is rectilinear or curved.

6. Cooking appliance according to claim 2, characterized in that the diameter D of the steam outlet opening (311) is not greater than the outer diameter D of the top cover (22).

7. The cooking appliance according to claim 2, wherein the steam generating device (300) comprises a top plate (312), the steam outlet (311) being provided on the top plate (312);

the rotating shaft (21) comprises an insertion part (211) capable of being inserted below the top plate (312) through the steam ejection opening (311), and a limiting part (212) arranged between the top cover (22) and the insertion part (211), wherein in an assembled state, the limiting part (212) is positioned above the top plate (312) and is matched with the insertion part (211) to limit the axial position of the turbulence piece (200) relative to the top plate (312) together.

8. The cooking appliance according to claim 7, wherein a first protrusion (3121) for reducing a contact area between the top plate (312) and the insertion portion (211) is provided on a lower surface of the top plate (312) or the insertion portion (211); and/or the number of the groups of groups,

the upper surface of the top plate (312) or the limit part (212) is provided with a second protrusion (3122) for reducing the contact area between the top plate (312) and the limit part (212).

9. Cooking appliance according to claim 8, wherein said insert (211) comprises at least two elastic catches, at least two of which are able to be elastically folded when passing through said steam ejection opening (311) and to rebound after passing through said steam ejection opening (311).

10. Cooking appliance according to any of claims 1-9, wherein the spoiler (200) is provided as an integral piece.

11. Cooking appliance according to any one of claims 1-9, wherein the shaft (21) is rotatably mounted in the vertical direction at the steam outlet opening (311).

12. The cooking appliance according to claim 11, wherein the mass m of the spoiler (200) satisfies the following formula:

wherein: n is the heating efficiency of the heating element (32) in the steam generator (300);

p ₀ heating power for a heating element (32) in the steam generator (300);

s is the opening area of the steam jet outlet (311);

lambda is the resistance coefficient of the steam ejection port (311);

r is the latent heat of vaporization of water.