CN217885790U - Air duct assembly and cooking appliance - Google Patents

Abstract

The application provides an air duct assembly and cooking utensil, the air duct assembly includes: the side wall of the container body is provided with container air inlets which are circumferentially distributed; the air duct is arranged around the container body and provided with air outlets distributed circumferentially, and the air outlets are arranged opposite to the air inlets of the container; the air supply piece is arranged in the air duct and can blow air in the air duct to the container body. According to the air duct assembly provided by the embodiment of the invention, the air flow blown out by the air supply piece can enter the container body through the air outlet and the air inlet of the container and is blown off towards the inner center of the container body, so that the air flow is uniformly distributed in the container body, and the air drying degree of the food materials can be more uniform under the condition of air drying of the food materials and the like; in addition, when the food is baked by matching with the heating element, the food material can be heated more uniformly, the maturity is consistent, and the cooking effect is better.

Description

Air duct assembly and cooking appliance

Technical Field

The application relates to the technical field of household appliances, in particular to an air duct assembly and a cooking utensil.

Background

Current air is fried pot and is equipped with hot-blast chamber including the casing of built-in culinary art chamber, the top in culinary art chamber, and hot-blast intracavity is equipped with hot-blast subassembly, and hot-blast subassembly includes the fan and generates heat the piece, and the hot-blast input that hot-blast subassembly produced cooks the chamber and in order to heat the internal edible material of pot. The hot-blast pot body that can downwards flow in of hot-blast subassembly production because whole wind direction is direct vertical decurrent, under the influence of fan, it has ascending rotatory wind current in circumference to it is inhomogeneous to lead to getting into the interior wind current of pot body, thereby influences holistic effect of toasting.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve at least that exist among the above-mentioned prior art or the correlation technique because the vertical downdraught of wind that the fan produced leads to having the ascending rotatory distinguished and admirable of circumference, it is inhomogeneous to get into the interior distinguished and admirable of pot body, influences the problem of holistic effect of toasting.

To this end, a first aspect of the present application is to provide an air duct assembly.

A second aspect of the present application is to provide a cooking appliance.

According to the utility model discloses an aspect provides an air duct assembly, include: the side wall of the container body is provided with container air inlets which are circumferentially distributed; the air duct is arranged around the container body and provided with air outlets distributed circumferentially, and the air outlets are arranged opposite to the air inlets of the container; the air supply piece is arranged in the air duct and can blow air in the air duct into the container body.

The air duct assembly provided by the embodiment of the aspect comprises a container body, an air duct and an air supply piece, wherein the container body can be used for containing food materials and the like; the air supply piece blows outside fresh air into the air duct and blows out the fresh air from the air outlets distributed circumferentially on the inner ring of the air duct, the air outlets of the air duct are opposite to a circle of container air inlets arranged on the side wall of the container body, so that air flow blown out by the air supply piece can enter the container body through the air outlets and the container air inlets and is blown off towards the inner center of the container body, the air flow is uniformly distributed in the container body, and under the condition of air drying of food materials and the like, the air drying degree of the food materials can be more uniform; in addition, when the food is baked by matching with the heating element, the food material can be heated more uniformly, the maturity is consistent, and the cooking effect is better.

In addition, the air duct assembly provided by the above embodiment of the present application may also have the following additional technical features:

in some embodiments, an annular air cavity and a mounting cavity located on the periphery of the air cavity are formed in the air duct, one end of the mounting cavity is communicated to the outside, the other end of the mounting cavity is communicated with the air cavity, the air supply piece is arranged in the mounting cavity, and the air outlet surface of the air supply piece faces the air cavity.

In these embodiments, the air supply member blows external fresh air into the annular air cavity, and under the action of air pressure, the air can rotate clockwise or counterclockwise (clockwise or counterclockwise and the fan setting position are related) in the air cavity, and is blown out from the air outlet located at the inner ring of the air duct, and then enters the container body via the air inlet of the container, and blows towards the inner center of the container body, so that the distribution of the air flow in the container body is more uniform.

In some embodiments, the air outlet direction of the air supply member is tangential to the inner wall of the air cavity. So set up for the air that the air feed spare blew off flows more smoothly in annular wind chamber, reduces the windage.

In some embodiments, the air duct further comprises: the container comprises an upper air duct shell and a lower air duct shell, wherein the upper air duct shell and the lower air duct shell enclose to form a cavity; the air guide piece is arranged in the upper air duct shell and comprises an air guide part, and the air guide part gradually inclines downwards towards the opening and extends into the opening.

In the embodiments, the upper duct shell and the lower duct shell enclose to form a cavity, and one side of the upper duct shell and the lower duct shell facing the container body are provided with a circle of openings, and the air guiding part of the air guiding sheet gradually inclines downwards from the inside of the cavity to the direction of the openings and extends into the openings to play a role in guiding air flow inside the air cavity, so that the air flow rotating in the air cavity is obliquely downwards guided into the container body, and the air flow can flow to food materials at the bottom of the container body.

In some embodiments, the air duct further comprises: the air guide ring is positioned at the opening, the lower end of the air guide ring is abutted with the lower air duct shell, the air guide ring comprises a ring body, a top wall of the ring body and a plurality of supporting blocks which are convexly arranged on the top wall of the ring body, and the supporting blocks are abutted with the lower surface of the air guide part to form an air outlet between the air guide part and the air guide ring.

In the embodiments, the air guide ring is arranged at the opening to shield a part of the opening, and the supporting block of the air guide ring is abutted against the lower surface of the air guide part, so that a circle of gap is formed between the air guide part and the air guide ring, the gap forms an air outlet, the air duct is integrally split into the upper air duct shell, the lower air duct shell, the air guide sheet and the air guide ring, and each part can be independently processed and produced, so that the air duct is simpler to process.

In some embodiments, the top wall of the ring body extends obliquely downwards from outside to inside, and forms an air outlet facing obliquely downwards by matching with the air guiding part; the lower surface of the air guide part is approximately parallel to the top wall of the ring body, and the distance between the lower surface of the air guide part and the top wall of the ring body is 1.5mm to 5mm.

In these embodiments, the top wall of the ring body extends obliquely downward toward the container body, and forms an obliquely downward air outlet in cooperation with the air guiding portion, so that the obliquely downward air outlet can better guide the direction of the air flow, and the air flow flows toward the bottom wall of the container body. Further, the distance between the lower surface of wind-guiding portion and the roof of ring body is 1.5mm to 5mm, and in this scope, can enough guarantee the air output, makes the wind speed via the air outlet great again to make the air current can distribute the most space of this internal of container, specifically, the wind speed of air outlet department can be reduced to the oversize, and the air output can be reduced to the undersize.

In some embodiments, the angle between the lower surface of the wind guiding part and the vertical direction is 20-45 °. In the range, the interior of the container body can be uniformly heated, specifically, if the inclination angle is too small, wind can reach the bottom wall of the container body in advance, and the wind can not reach the central range of the bottom wall of the container body, can rotate in the container body, and is thrown to the side wall of the container body, so that uneven heating is caused; and if inclination is too big, wind can postpone reaching the bottom of a boiler, can exceed the central scope of container body diapire, then at the inside rotation of container body, and then get rid of the lateral wall to container body, cause the heating inhomogeneous.

In some embodiments, the top end of the ring body is higher than the bottom end of the air guiding part, so that the ring body and the air guiding part are partially structurally staggered; the staggered size of the ring body and the air guide part is 0.5mm to 5mm.

In the embodiments, the ring body and the air guide part are arranged in a staggered manner from inside to outside to form a structure similar to a shutter, and the top end of the ring body positioned inside is higher than the bottom end of the air guide part, so that oil drops and the like splashed from the inside of the container body through the air inlet of the container can be shielded, the risk of splashing flying oil into an air duct is avoided, and tainting odor is formed; furthermore, the staggered size of the ring body and the air guide part is 0.5mm to 5mm, if the staggered size is too large, the air outlet can be shielded, the blowing-in air speed is influenced, the cooking efficiency is reduced, and if the staggered size is too small, the effect of shielding oil drops cannot be achieved.

In some embodiments, the number of support blocks is 3 or greater. 3 and more than 3 supporting blocks can realize the stable support between wind-guiding portion and the ring body.

In some embodiments, the distance between two adjacent support blocks is greater than or equal to 20mm. If the distance between two adjacent supporting blocks is too close, wind is easy to be blocked, and the wind outlet efficiency is influenced.

In some embodiments, the ratio of the projected area of the outlet vent in the horizontal plane to the projected area of the support block in the horizontal plane is 10 to 200. In this scope, the area of air outlet is far greater than the area of supporting shoe, and the supporting shoe is little to the influence of air-out, and the air-out effect is more smooth and easy.

In some embodiments, the lower portion of the container body is inwardly shrunk to form a shrinking portion, and the container air inlet is arranged on the shrinking portion; the length of the air inlet of the container in the vertical direction is larger than that of the air outlet in the vertical direction, and the air outlet is located in the range of the air inlet of the container in the vertical direction.

In the embodiments, the air duct is arranged around the periphery of the container body, so that the lower part of the container body is contracted, the air duct is arranged around the periphery of the contracted part, and a smaller space can be occupied, the volume of the air duct assembly is smaller, and the miniaturization of a product is facilitated; further, the length of the air inlet of the container in the vertical direction is larger than that of the air outlet in the vertical direction, and the air outlet is located in the range of the air inlet of the container in the vertical direction, so that leakage of hot air is reduced as much as possible.

According to a second aspect of the present invention, there is provided a cooking appliance, comprising: a heating member; and the air duct assembly as in any one of the embodiments of the first aspect, the heating member is disposed in the air duct of the air duct assembly, and the air outlet surface of the air supply member faces the heating member.

The utility model discloses a cooking utensil that the second aspect provided, owing to have the wind channel subassembly that any embodiment of the first aspect provided, consequently, have the whole beneficial effect of the wind channel subassembly that any embodiment of the first aspect provided, do not enumerate here one by one. And the heating member is arranged in the air duct and can heat the air in the air duct, so that the air blown into the container body by the air supply member is hot air, and the effect of baking food is achieved.

In some embodiments, the heating element comprises an annular heating tube. The annular heating tube can be better matched with the annular air cavity, and the heating area is increased as much as possible, so that the heating efficiency is high, and the heating is uniform.

In some embodiments, the heating element includes an annular heating tube and a plurality of heat transfer fins arranged around the annular heating tube, and the extending direction of the heat transfer fins faces the center of the air duct. So set up, the heat transfer piece can play the effect to hot-blast direction, with the center of hot-blast direction container body, can also effectual increase heating area improve heating efficiency.

In some embodiments, in the case where the heating member includes a heat transfer sheet, the heat transfer sheet is a circular sheet, and a plurality of heat transfer sheets are disposed at intervals on the outer periphery of the annular heat generating pipe in the circumferential direction of the annular heat generating pipe. The wafer has simple structure and is easy to process.

In some embodiments, the heat transfer sheet is spirally wound around the outer circumference of the annular heat generating tube along the circumferential direction of the annular heat generating tube. The spiral heat transfer sheet can be tightly coiled on the periphery of the annular heating tube, and the spiral heat transfer sheet is more favorable for being assembled with the annular heating tube.

In some embodiments, the heat transfer sheet of one of the plurality of heat transfer sheets, which can be tangent to an extension of the axis of the air supply member, extends at an obtuse angle to the axis of the air supply member. So set up, can reduce the direction resistance of the air current that the air feed spare blew, make the air current flow more smooth and easy.

In some embodiments, the pipe diameter of the annular heating pipe is 5mm to 8mm. If the pipe diameter is too large, the air duct needs to be enlarged at the same time, so that the whole machine is overstaffed and the cost is increased; and if the pipe diameter is too small, the heat dissipation area is small, the heat is concentrated, and the annular heating pipe is easy to damage.

In some embodiments, the heat transfer fins have a diameter of 10mm to 25mm. If the diameter of the heat transfer sheet is too large, the air duct needs to be enlarged at the same time, so that the whole machine is too bulky and the cost is increased; if the diameter of the heat transfer sheet is too small, the heat dissipation area is small, the heat is concentrated, and the annular heating tube is easy to damage.

In some embodiments, the annular heating tube is divided into a plurality of sub-tube sections from the air outlet surface of the air supply member, and the power of the plurality of sub-tube sections is gradually reduced along the flow direction of the outlet air flow of the air supply member.

In some embodiments, the power of the annular heating tube is segmented, the power of the position of the annular heating tube at the position with large wind speed is set to be larger, and the power of the position of the annular heating tube at the position with small wind speed is set to be smaller, so that the heating uniformity can be effectively improved, the overlarge power of the annular heating tube at the position with low wind speed can be avoided, and the annular heating tube is further damaged due to untimely cooling, and the service life of the annular heating tube is prolonged.

In some embodiments, the lowest power one of the plurality of sub-segments is a low power sub-segment, and the ring-shaped heat generating tube includes a cold end and a wiring portion, the cold end and the wiring portion being located in the low power sub-segment. So set up, set up cold junction and wiring portion in low-power sub-pipe section, promptly, the lower position of temperature can prevent to damage annular heating tube because the high temperature.

In some embodiments, the cooking appliance further comprises: the pot cover can be covered on the container body of the air duct assembly, the pot cover comprises a handle arranged on the cover body, and the handle is provided with an exhaust hole communicated with the inside of the container body. The hot air after cooking can be got rid of through the exhaust hole on the handle to form the extrinsic cycle wind channel, make and blow the inside fresh air of container body at every turn, the food material does not taint the flavor.

In some embodiments, the cooking appliance further comprises: the heat preservation cover is arranged below the air duct and is used for heat insulation; the heating disc assembly is arranged on the heat insulation cover, the air duct is annular, and the heating disc assembly is located in the middle of the air duct and can heat a container body of the air duct assembly.

In the embodiments, the heat-insulating cover can insulate heat, prevent the heat from overflowing and improve the heating efficiency; further, set up the dish subassembly that generates heat in the middle part in wind channel to make the dish subassembly that generates heat can be used for heating the container body of installing in its top, realize dual heating to the edible material in the container body. Or after the container body is taken down, the heating plate assembly can be used for heating the small pot placed on the heating plate assembly and is used for cooking, steaming, frying food materials and the like, and therefore the multifunctional cooking container is multifunctional.

In some embodiments, the cooking utensil further comprises a base assembly, the base assembly comprises a base and an upper cover, the upper cover covers the base and encloses with the base to form an accommodating cavity, the air duct assembly is arranged in the accommodating cavity, a through hole for accommodating the container body is formed in the middle of the upper cover, and the container body penetrates through the through hole and is detachably mounted on the base assembly.

In the embodiments, the air duct assembly is arranged in the base assembly, the container body is placed on the base assembly to form a structure which can be separated from the upper part and the lower part, when cooking is carried out, the heating element and/or the heating disc assembly in the base assembly can heat the container body, hot air can rise, and the heating effect is more uniform.

Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.

Drawings

The above and other objects and features of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of a cooking appliance provided according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a cooking device according to an embodiment of the present invention;

fig. 3 is another schematic sectional view of a cooking appliance according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

fig. 5 is a partial schematic structural view of a base assembly of a cooking appliance according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional structure of the structure of FIG. 5;

FIG. 7 is a top view of the structure of FIG. 5;

FIG. 8 is a schematic structural view of the structure of FIG. 5 in an inverted state;

FIG. 9 is an exploded view of the structure of FIG. 5;

fig. 10 is a schematic structural view of an upper duct housing of a cooking appliance according to an embodiment of the present invention;

fig. 11 is another schematic structural view of an upper duct housing of a cooking appliance according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a heating element of a cooking appliance according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a heat retaining cover of a cooking appliance according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a wind deflector of a cooking appliance according to an embodiment of the present invention;

fig. 15 is another schematic structural view of a wind deflector of a cooking appliance according to an embodiment of the present invention;

fig. 16 is a schematic structural view of a lower duct housing of a cooking appliance according to an embodiment of the present invention;

fig. 17 is another structural schematic diagram of a lower air duct shell of a cooking appliance according to an embodiment of the present invention;

fig. 18 is a schematic structural view of a wind guide ring of a cooking appliance according to an embodiment of the present invention;

fig. 19 is another schematic structural view of a wind guide ring of a cooking appliance according to an embodiment of the present invention;

fig. 20 is a schematic structural view of a heating disc assembly of a cooking appliance according to an embodiment of the present invention;

fig. 21 is another schematic structural view of a heating disc assembly of a cooking appliance according to an embodiment of the present invention;

fig. 22 is a schematic structural diagram of a pot assembly of a cooking appliance according to an embodiment of the present invention;

FIG. 23 is a schematic cross-sectional view of the structure of FIG. 22 and showing the flow path of the gas flow;

FIG. 24 is a schematic cross-sectional structure view of the structure of FIG. 22;

fig. 25 is a schematic structural view of a container body of a cooking appliance according to an embodiment of the present invention;

FIG. 26 is a schematic cross-sectional structure view of the structure of FIG. 25;

fig. 27 is a schematic view of a projected area of the annular air outlet and the support block of the cooking appliance according to an embodiment of the present invention;

fig. 28 is a schematic view of air flow in the air duct of a cooking appliance provided in accordance with an embodiment of the present invention;

fig. 29 is a schematic view of air flow at a heating element of a cooking appliance provided in accordance with an embodiment of the present invention;

fig. 30 is a schematic cross-sectional view of a base assembly of a cooking appliance showing the power trend of a heating element according to an embodiment of the present invention;

fig. 31 is a schematic structural diagram of a heating element of a cooking appliance according to an embodiment of the present invention, which illustrates a power variation trend of the heating element.

Fig. 1 to 31 are numbered as follows:

10 pot components, 110 container bodies, 111 cooking cavities, 112 container air inlets, 113 contraction parts, 120 pot covers, 121 cover bodies, 122 handles, 1221 exhaust holes, 140 frying plates,

20 air ducts, 210 an upper air duct shell, 211 an avoidance port, 220 a lower air duct shell, 230 an air guide sheet, 231 an air guide part, 232 mounting columns, 240 an air guide ring, 241 a ring body, 242 supporting blocks, 243 the top wall of the ring body, 250 an air outlet, 260 an air cavity, 270 an installation cavity,

310 air supply parts, 320 heating parts, 321 annular heating pipes, 3211 high-power sub-pipe sections, 3212 middle-power sub-pipe sections, 3213 low-power sub-pipe sections, 3214 cold ends, 3215 wiring parts and 322 heat transfer sheets,

40 heat preservation cover, 50 heating plate component, 510 heating plate, 520 temperature measurement component,

60 base assembly, 610 base, 620 cover.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art upon reading the disclosure of the present application. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be changed as will become apparent after understanding the present disclosure, in addition to operations that must occur in a particular order. Moreover, descriptions of features known in the art may be omitted for greater clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, apparatus and/or systems described herein, which will be apparent after understanding the disclosure of the present application.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in the examples described herein can also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.

In the specification, when an element such as a layer, region or substrate is referred to as being "on," "connected to" or "coupled to" another element, it can be directly on, connected to or coupled to the other element or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there may be no intervening elements present.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular is also intended to include the plural unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof. The term "plurality" means any number of two or more.

The definitions of the terms of orientation such as "upper", "lower", "top" and "bottom" in the present application are all defined based on the orientation of the air fryer when the air fryer is in a normal use state and is placed upright.

Unless otherwise defined, all terms including 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 after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal sense.

Further, in the description of the examples, when it is considered that detailed description of well-known related structures or functions will cause a vague explanation of the present invention, such detailed description will be omitted.

The air duct assembly and the cooking appliance of some embodiments of the present application will be described below with reference to fig. 1 to 31.

As shown in fig. 2-5 and 22-25, a first aspect of the present invention provides an air duct assembly, comprising: the container comprises a container body 110, wherein container air inlets 112 distributed circumferentially are formed in the side wall of the container body 110; the air duct 20 is arranged around the periphery of the container body 110, the air duct 20 is provided with air outlets 250 distributed circumferentially, and the air outlets 250 are arranged opposite to the container air inlets 112; and an air supply member 310 disposed in the air duct 20, wherein the air supply member 310 can blow air in the air duct 20 into the container body 110.

The air duct assembly provided in the embodiment of the present aspect includes a container body 110, an air duct 20, and an air supply member 310, where the container body 110 may be used to accommodate food materials and the like; the air supply piece 310 blows outside fresh air into the air duct 20 and blows out the fresh air from the air outlets 250 circumferentially distributed on the inner ring of the air duct 20, the air outlets 250 of the air duct 20 are opposite to a circle of container air inlets 112 formed in the side wall of the container body 110, so that air flow blown out by the air supply piece 310 can enter the container body 110 through the air outlets 250 and the container air inlets 112 and blow off the air flow towards the inner center of the container body 110, the air flow is uniformly distributed in the container body 110, and the air drying degree of the food materials can be more uniform under the condition of air drying the food materials and the like; in addition, when the heating element 320 is matched to bake food, the food can be heated more uniformly, the maturity is consistent, and the cooking effect is better.

In some embodiments, the air outlet 250 may be an opening that is circumferentially and continuously distributed, in which case, the air outlet 250 is an annular air outlet; the air outlets 250 may also be through openings circumferentially spaced, and the number of the through openings is plural; similarly, the container inlet 112 may be a circumferentially continuous opening, in which case the container inlet 112 is an annular inlet; the container inlet 112 may also be a plurality of circumferentially spaced openings.

Regarding the specific structure of the air duct 20 and the installation position of the air supply member 310, in some embodiments, as shown in fig. 5 to 8, 10, 11, 16 and 17, an annular air cavity 260 and an installation cavity 270 located at the periphery of the air cavity 260 are formed in the air duct 20, one end of the installation cavity 270 communicates with the outside, the other end communicates with the air cavity 260, the air supply member 310 is disposed in the installation cavity 270, and an air outlet surface of the air supply member 310 faces the air cavity 260.

In these embodiments, the air supply member 310 blows fresh air from the outside into the annular air chamber 260, and under the action of the wind pressure, the air will rotate clockwise or counterclockwise in the air chamber 260 (clockwise or counterclockwise is related to the position where the fan is disposed), and is blown out from the air outlet 250 located at the inner ring of the air duct 20, and then enters the interior of the container body 110 through the container inlet 112, and is blown towards the inner center of the container body 110, so that the distribution of the air flow in the container body 110 is more uniform.

Alternatively, the air supply 310 may be a fan, preferably an axial fan.

In some embodiments, as shown in fig. 28, the wind outlet direction of the wind supply member 310 is tangential to the inner wall of the wind cavity 260. By the arrangement, the air blown out by the air supply member 310 flows more smoothly in the annular air cavity 260, and the wind resistance is reduced.

Further, in some embodiments, as shown in fig. 28, the minimum distance L7 between the air supply member 310 and the annular center line of the air cavity 260 is in a range of 5mm to 25mm, so as to prevent the air supply member 310 from being too close to the heating member 320 and being damaged due to too high temperature.

It should be noted that, because the wind cavity 260 is annular, any cross section of the wind cavity 260 is circular, and the annular center line of the wind cavity 260 is: the centers of the cross sections of the wind cavities 260 are connected to form a circle.

With respect to the specific structure of the air chute 20, in some embodiments, as shown in fig. 4, 5, 6, and 9, the air chute 20 further comprises: the container comprises an upper air duct shell 210 and a lower air duct shell 220, wherein the upper air duct shell 210 and the lower air duct shell 220 enclose to form a cavity, and one side, facing the container body 110, of the enclosed upper air duct shell 210 and the enclosed lower air duct shell 220 is provided with a circle of openings; the air guide sheet 230 is disposed in the upper duct shell 210, and the air guide sheet 230 includes an air guide portion 231, and the air guide portion 231 gradually inclines downward toward the opening and extends into the opening.

In these embodiments, the upper duct casing 210 and the lower duct casing 220 enclose a cavity, and have a circle of openings on a side facing the container body 110, the wind guiding portion 231 of the wind guiding plate 230 gradually inclines downward from the inside of the cavity toward the direction of the openings and extends into the openings, so as to guide the airflow inside the wind cavity 260, and thus the airflow rotating in the ring shape in the wind cavity 260 can be obliquely and downwardly guided into the container body 110, so that the airflow can flow to the food material at the bottom of the container body 110.

It is worth noting that the cavities include a mounting cavity 270 and a plenum 260.

As to the specific structure of the air guiding sheet 230, in some embodiments, as shown in fig. 14 and fig. 15, optionally, as an example, the air guiding sheet 230 further includes a mounting column 232 for fixedly connecting with the upper duct casing 210, for example, a plurality of through holes or threaded holes may be provided on the upper duct casing 210, and the through holes or threaded holes may be provided in the mounting column 232, so that the assembly of the air guiding sheet 230 and the upper duct casing 210 is achieved by using a connecting member such as a screw or a bolt.

With respect to the specific structure of the air chute 20, in some embodiments, as shown in fig. 4, 5, 6, and 9, the air chute 20 further comprises: as shown in fig. 18 and 19, the air guide ring 240 includes a ring body 241, a top wall 243 of the ring body, and a plurality of supporting blocks 242 protruding from the top wall 243 of the ring body, and the supporting blocks 242 abut against the lower surface of the air guide portion 231 to form an air outlet 250 between the air guide portion 231 and the air guide ring 240.

In these embodiments, the wind-guiding ring 240 is disposed at the opening to shield a portion of the opening, and the supporting block 242 of the wind-guiding ring 240 abuts against the lower surface of the wind-guiding portion 231, so as to form a circle of gap between the wind-guiding portion 231 and the wind-guiding ring 240, the gap forms the wind outlet 250, and the wind duct 20 is integrally split into the upper wind duct shell 210, the lower wind duct shell 220, the wind-guiding sheet 230 and the wind-guiding ring 240, which can be processed and produced separately for each component, so that the processing of the wind duct 20 is simpler.

In some embodiments, as shown in fig. 5, the top wall 243 of the ring body extends obliquely downward from outside to inside, and forms an air outlet 250 facing obliquely downward in cooperation with the air guiding portion 231; the lower surface of the wind-guiding portion 231 is substantially parallel to the top wall 243 of the ring body, as shown in fig. 5, and the distance H1 between the lower surface of the wind-guiding portion 231 and the top wall 243 of the ring body is 1.5mm to 5mm. It can be understood that, in the embodiment, the air outlet 250 formed by a circle of gap between the air guiding portion 231 and the air guiding ring 240 is an annular air outlet.

In these embodiments, the top wall 243 of the ring body extends obliquely downward toward the container body 110, and forms the air outlet 250 obliquely downward in cooperation with the air guiding portion 231, and the air outlet 250 obliquely downward can better guide the direction of the air flow, so that the air flow flows toward the bottom wall of the container body 110. Further, the distance H1 between the lower surface of the air guiding portion 231 and the top wall 243 of the ring body is 1.5mm to 5mm, and in this range, the air output can be ensured, and the air speed through the air outlet 250 is larger, so that the air flow can be distributed to most of the space in the container body 110, specifically, the air speed at the air outlet 250 is reduced when the size is too large, and the air output is reduced when the size is too small.

In some embodiments, as shown in fig. 5, the angle α 1 between the lower surface of the wind guiding portion 231 and the vertical direction is 20 ° to 45 °. In this range, the interior of the container body 110 can be uniformly heated, specifically, if the inclination angle is too small, the wind may reach the bottom wall of the container body 110 in advance, and the wind may not reach the central range of the bottom wall of the container body 110, and may rotate inside the container body 110, and then throw the wind toward the side wall of the container body 110, thereby causing uneven heating; if the inclination angle is too large, the wind can delay to reach the bottom of the pan, can exceed the central range of the bottom wall of the container body 110, then rotates in the container body 110, and is thrown to the side wall of the container body 110, so that uneven heating is caused.

In some embodiments, as shown in fig. 5, the top end of the ring body 241 is higher than the bottom end of the wind guiding portion 231, so that the ring body 241 and the wind guiding portion 231 are partially staggered; the staggered size H3 of the ring body 241 and the air guiding portion 231 is 0.5mm to 5mm.

In these embodiments, the ring body 241 and the air guiding portion 231 are arranged in a staggered manner from inside to outside to form a structure similar to a louver, and the top end of the ring body 241 inside is higher than the bottom end of the air guiding portion 231, so as to shield oil drops and the like splashed from the inside of the container body 110 through the container air inlet 112, thereby avoiding the risk of splashing of the oil into the air duct 20 and forming tainted odor; further, as shown in fig. 5, the cross dimension H3 of the ring body 241 and the air guiding portion 231 is 0.5mm to 5mm, if the cross dimension is too large, the air outlet 250 is blocked, the blowing-in air speed is affected, the cooking efficiency is reduced, and if the cross dimension is too small, the oil drop blocking effect cannot be achieved.

In some embodiments, as shown in fig. 18 and 19, the number of support blocks 242 is equal to or greater than 3. The 3 and more than 3 supporting blocks 242 can realize stable support between the air guiding part 231 and the ring body 241.

Alternatively, the number of the supporting blocks 242 is preferably 3, and 3 supporting blocks 242 can stably support and facilitate the wind to flow through due to the minimum occupied area of the wind outlet 250.

In some embodiments, as shown in fig. 18, the distance L8 between two adjacent support blocks 242 is greater than or equal to 20mm. If the distance L8 between two adjacent supporting blocks 242 is too close, wind is easily blocked, which affects the wind-out efficiency.

In some embodiments, as shown in fig. 27, the ratio of the projected area of the outlet 250 in the horizontal plane to the projected area of the support blocks 242 in the horizontal plane is 10 to 200. In this range, the area of the air outlet 250 is much larger than that of the supporting blocks 242, the supporting blocks 242 have little influence on the air outlet, and the air outlet effect is smoother.

In some embodiments, as shown in fig. 22 to 26, the lower portion of the container body 110 is inwardly shrunk to form a shrinking portion 113, and the container inlet 112 is disposed on the shrinking portion 113; the length of the container inlet 112 in the vertical direction is greater than the length of the outlet 250 in the vertical direction, and the outlet 250 in the vertical direction is located within the range of the container inlet 112.

In these embodiments, since the air duct 20 is enclosed around the container body 110, the lower portion of the container body 110 is contracted and the air duct 20 is enclosed around the contracted portion 113, which can occupy a smaller space, so that the volume of the air duct assembly is smaller, which is beneficial to the miniaturization of the product; further, the length of the container inlet 112 in the vertical direction is greater than the length of the outlet 250 in the vertical direction, and the outlet 250 in the vertical direction is located within the range of the container inlet 112, so as to reduce the leakage of the hot air as much as possible.

In some embodiments, as an example, optionally, as shown in fig. 26, the length H2 of the container air inlet 112 in the vertical direction is 2mm to 7mm, and in this range, it can be better matched with the size of the air outlet 250 and is slightly larger than the air outlet 250, thereby reducing the leakage of the hot air as much as possible.

As shown in fig. 1 to 4, 12, according to a second aspect of the present invention, there is provided a cooking appliance, including: a heating member 320; and the air duct assembly according to any of the embodiments of the first aspect described above, the heating member 320 is disposed in the air duct 20 of the air duct assembly, and the air outlet surface of the air supply member 310 faces the heating member 320.

The utility model discloses a cooking utensil that the second aspect provided, owing to have the wind channel subassembly that any embodiment of the first aspect provided, consequently, have the whole beneficial effect of the wind channel subassembly that any embodiment of the first aspect provided, do not enumerate here one by one. The heating member 320 is disposed in the air duct 20 to heat air in the air duct 20, so that the air blown into the container body 110 by the air supply member 310 is hot air, thereby achieving an effect of baking food.

In some embodiments, the heating element 320 includes an annular heating tube 321. The annular heating pipe 321 can be better matched with the annular air cavity 260, and the heating area is increased as much as possible, so that the heating efficiency is high, and the heating is uniform.

In some embodiments, as shown in fig. 12 and 29, the heating member 320 includes an annular heat generating pipe 321 and a plurality of heat transfer fins 322 surrounding the annular heat generating pipe 321, and the heat transfer fins 322 extend toward the center of the air duct 20. So set up, heat transfer piece 322 can play the effect to hot-blast direction, with the center of hot-blast direction container body 110, can also effectual increase heating area improve heating efficiency.

In some embodiments, as shown in fig. 12 and 29, in the case where the heating member 320 includes the heat transfer sheet 322, the heat transfer sheet 322 is a circular sheet, and a plurality of heat transfer sheets 322 are disposed at intervals on the outer circumference of the annular heat generating pipe 321 along the circumferential direction of the annular heat generating pipe 321. The wafer has simple structure and is easy to process.

In some embodiments, as shown in fig. 12 and 29, the heat transfer fins 322 are spirally wound around the outer circumference of the annular heat-generating pipe 321 along the circumferential direction of the annular heat-generating pipe 321. The spiral heat transfer fins 322 can be tightly wound around the periphery of the annular heating tube 321, and are more favorable for assembly with the annular heating tube 321.

In some embodiments, as shown in fig. 29, an angle α 9 between an extending direction of one of the heat transfer sheets 322, which can be tangent to an extension line of the axis of the air supply member 310, and the axis of the air supply member 310 is an obtuse angle. With such an arrangement, the guide resistance of the air flow blown by the air supply member 310 can be reduced, and the air flow can be smoother.

In some embodiments, the diameter of the ring-shaped heat-generating pipe 321 is 5mm to 8mm. If the pipe diameter is too large, the air duct 20 needs to be enlarged at the same time, so that the whole machine is overstaffed and the cost is increased; however, if the pipe diameter is too small, the heat dissipation area is small, the heat is concentrated, and the annular heating pipe 321 is easily damaged.

In some embodiments, the heat transfer fins 322 have a diameter of 10mm to 25mm. If the diameter of the heat transfer sheet 322 is too large, the air duct 20 needs to be enlarged at the same time, so that the whole machine is too bulky and the cost is increased; however, if the diameter of the heat transfer fin 322 is too small, the heat dissipation area is small, the heat is concentrated, and the annular heat pipe 321 is easily damaged.

In some embodiments, as shown in fig. 30 and 31, the annular heat generating pipe 321 is divided into a plurality of sub-pipe sections from the outlet surface of the air supply member 310, and the power of the plurality of sub-pipe sections is gradually reduced along the outlet airflow flowing direction of the air supply member 310.

In some embodiments, the power of the annular heating tube 321 is segmented, and the power of the position of the annular heating tube 321 at the position with high wind speed is set to be higher, and the power of the position of the annular heating tube 321 at the position with low wind speed is set to be lower, so that the heating uniformity can be effectively improved, the power of the annular heating tube 321 at the position with low wind speed can be prevented from being too high, and further, the annular heating tube 321 is damaged due to untimely cooling, and the service life of the annular heating tube 321 is prolonged.

In a specific embodiment, optionally, as shown in fig. 30 and fig. 31, starting from a position of the annular heating tube 321 opposite to the air outlet surface of the air supply member 310, the annular heating tube 321 is divided into a plurality of sub-tube segments, for example, the annular heating tube 321 is divided into three segments in this embodiment, which are a high-power sub-tube segment 3211, a medium-power sub-tube segment 3212, and a low-power sub-tube segment 3213 in sequence, the high-power sub-tube segment 3211 can be directly blown by the air supply member 310, the air speed is high, and the heat dissipation is fast, so the high-power sub-tube segment 3211 is set to be high power; the middle power sub-pipe segment 3212 connected with the wind power generator is located in the middle, the wind speed is moderate, and the heat dissipation is centered, so that the middle power sub-pipe segment 3212 is set to be middle power; the wind speed at the end of the air supply member 310 in the direction of the flow of the outlet air is low, the heat dissipation is slow, and the low-power sub-pipe segment 3213 in this region is set to be low-power.

It can be understood that the power in each segment of sub-pipe segment can be equal or gradually changed, and the designer can select the power according to actual requirements, but the power belongs to the protection scope of the scheme on the premise of not departing from the design concept.

In some embodiments, as shown in fig. 30 and 31, the lowest power one of the plurality of sub-tube segments is a low-power sub-tube segment 3213, the annular heating tube 321 includes a cold end 3214 and a junction 3215, and the cold end 3214 and the junction 3215 are located in the low-power sub-tube segment 3213. So configured, the cold end 3214 and the wiring portion 3215 are disposed in the low-power sub-pipe segment 3213, that is, at a position with a lower temperature, so as to prevent the ring-shaped heating pipe 321 from being damaged due to an excessively high temperature.

In some embodiments, as shown in fig. 7, 10 and 11, an avoiding opening 211 is provided on the upper duct housing 210, and the connection portion 3215 extends from the avoiding opening 211 to the outside of the upper duct housing 210 for connecting to a power supply.

In some embodiments, as shown in fig. 1 to 3 and 22, 23, 24, the cooking appliance further includes: the lid 120 can be covered on the container body 110, the lid 120 includes a handle 122 disposed on the lid body 121, and the handle 122 is provided with an air vent 1221 communicated with the inside of the container body 110. The hot air after cooking can be exhausted through the air outlet 1221 of the handle 122, so as to form the external circulation air duct 20, so that fresh air is blown into the container body 110 every time, and the food materials are not tainted.

In some embodiments, as shown in fig. 1 to 3 and 22, 23 and 24, the vent hole 1221 is disposed on the side wall of the handle 122, so that hot air can be discharged toward the side, thereby preventing the user from being burnt easily by discharging the hot air straight upward, and the user can select the orientation of the vent hole 1221, which is more advantageous for the cooking operation.

Specifically, the lid 120 and the container body 110 form a pot assembly 10 for containing food to be cooked.

In some embodiments, as shown in fig. 6, 7, 8, 9, 13, 20, 21, the cooking appliance further comprises: the heat preservation cover 40 is arranged below the air duct 20, and the heat preservation cover 40 is used for heat insulation; the heating disc assembly 50 is arranged on the heat preservation cover 40, the air duct 20 is annular, and the heating disc assembly 50 is located in the middle of the air duct 20 and can heat the container body 110.

In the embodiments, the heat insulation cover 40 can insulate heat, prevent the heat from overflowing and improve the heating efficiency; further, the heating disc assembly 50 is disposed in the middle of the air duct 20, so that the heating disc assembly 50 can be used for heating the container body 110 mounted above the heating disc assembly, and double heating of the food material in the container body 110 is achieved. Or, after the container body 110 is taken down, the heating disc assembly can be used for heating a small pot placed on the heating disc assembly, and is used for cooking, steaming, frying food materials and the like, so that the multifunctional container is multifunctional.

It should be noted that the heating plate assembly 50 and the heating member 320 may work simultaneously or separately, and the user may select the heating plate assembly according to specific requirements, so as to expand the application range of the product.

In some embodiments, optionally, the heat insulation cover 40 is provided with a flange and a fixing portion, the flange is used for expanding a volume of a cavity formed by the lower air duct shell 220 and the heat insulation cover 40, and provides an enough accommodating space for the heating plate assembly 50, and the fixing portion is used for being fixedly connected with the lower air duct shell 220, and specifically can be fastened on the lower air duct shell 220 by a fastening member such as a screw passing through the fixing portion.

Further, optionally, as shown in fig. 20 and 21, the heating tray assembly 50 includes a heating tray 510 and a temperature measuring member 520, and the temperature measuring member 520 can be used to detect the temperature of the bottom of the pot or the container body 110, so as to improve the temperature control effect.

In some embodiments, as shown in fig. 1, 2, 3 and 4, the cooking appliance further includes a base assembly 60, the base assembly 60 includes a base 610 and an upper cover 620, the upper cover 620 covers the base 610 and encloses with the base 610 to form a containing cavity, the air duct assembly is disposed in the containing cavity, a through hole for containing the container body 110 is formed in the middle of the upper cover 620, and the container body 110 is detachably mounted on the base assembly 60 through the through hole.

In these embodiments, the air duct assembly is disposed in the base assembly 60, the container body 110 is placed on the base assembly 60, and the upper and lower parts of the container body 110 can be separated from each other, and when cooking is performed, the heating element 320 and/or the heating plate assembly 50 in the base assembly 60 can heat the container body 110, and hot air can rise, so that the heating effect is more uniform.

It is understood that the exterior of the container body 110 may have an outer shell for preventing heat from being diffused, preventing burn, etc.; the container body 110 internally forms a cooking cavity 111. In addition, the shell can be provided with a handle, so that the shell is convenient to take and place.

Further, optionally, the upper cover 620 is connected to the base 610 by fasteners such as screws.

In some embodiments, as shown in fig. 2, 3 and 23, the cooking appliance further comprises a frying plate 140, the frying plate 140 can be placed in the container body 110 for supporting the food materials for baking and air-frying, and a plurality of oil leaking holes are formed in the frying plate 140 for filtering grease, so as to prevent grease from accumulating at the bottom of the food materials and being too greasy. Further, the frying plate 140 is located above the air inlet 112 of the container, so that hot air is prevented from directly blowing to the food material to cause scorching, and the hot air rotates in the container body 110 and upwards passes through the frying plate 140 to cook the food material due to the rising of the hot air, so that the food material is heated more uniformly.

In the cooking appliance of the embodiment of the present application, the air heated by the heating member 320 is substantially divided into two paths, the first path: the hot air passes through the heating member 320, and based on the condition that the heating member 320 includes the heat transfer sheet 322, most of the hot air is guided by the heat transfer sheet 322, so that the hot air enters the cooking cavity 111 of the container body 110 through the air outlet 250 and the container air inlet 112, and the air blows toward the center of the container body 110; a second path: the hot air passes through the lower part of the heating element 320, part of the air rotates clockwise along with the annular air duct 20, the other part of the air enters the container body 110 from the air outlet 250, and the air obliquely rotates to blow away from the center of the container body 110; the heated air rotates within the container body 110 and the heated air passes upwardly through the frying plate 140 to cook the food material, which is heated more uniformly.

In some embodiments, optionally, the cooking appliance is an air fryer.

Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that such modifications and variations that may appear to those skilled in the art will still fall within the spirit and scope of the embodiments of the invention as defined by the appended claims.

Claims (18)

1. An air duct assembly, comprising:

the container comprises a container body (110), wherein the side wall of the container body (110) is provided with container air inlets (112) which are distributed circumferentially;

the air duct (20) is arranged around the container body (110) in a surrounding mode, the air duct (20) is provided with air outlets (250) distributed in the circumferential direction, and the air outlets (250) are arranged opposite to the container air inlets (112);

the air supply piece (310) is arranged in the air duct (20), and the air supply piece (310) can blow air in the air duct (20) to the container body (110).

2. The air duct assembly of claim 1,

an annular air cavity (260) and a mounting cavity (270) located on the periphery of the air cavity (260) are formed in the air duct (20), one end of the mounting cavity (270) is communicated to the outside, the other end of the mounting cavity is communicated with the air cavity (260), the air supply piece (310) is arranged in the mounting cavity (270), and the air outlet surface of the air supply piece (310) faces the air cavity (260).

3. The air duct assembly of claim 2,

the air outlet direction of the air supply piece (310) is tangent to the inner wall of the air cavity (260).

4. The air duct assembly according to any one of claims 1 to 3, characterized in that the air duct (20) further comprises:

the container comprises an upper air duct shell (210) and a lower air duct shell (220), wherein the upper air duct shell (210) and the lower air duct shell (220) enclose to form a cavity, and one side, facing the container body (110), of the upper air duct shell (210) and the lower air duct shell (220) after enclosing is provided with a circle of openings;

the air guide sheet (230) is arranged in the upper air duct shell (210), the air guide sheet (230) comprises an air guide part (231), and the air guide part (231) gradually inclines downwards towards the direction of the opening and extends into the opening.

5. The air duct assembly of claim 4, further comprising:

the air guide ring (240) is located at the opening, the lower end of the air guide ring (240) is abutted against the lower air duct shell (220), the air guide ring (240) comprises a ring body (241), a top wall (243) of the ring body and a plurality of supporting blocks (242) which are convexly arranged on the top wall (243) of the ring body, and the supporting blocks (242) are abutted against the lower surface of the air guide part (231) so as to form the air outlet (250) between the air guide part (231) and the air guide ring (240).

6. The air duct assembly of claim 5,

the top wall (243) of the ring body extends downwards from outside to inside in an inclined manner and is matched with the air guide part (231) to form the air outlet (250) facing downwards in an inclined manner;

the lower surface of the air guide part (231) is substantially parallel to the top wall (243) of the ring body, and the distance between the lower surface of the air guide part (231) and the top wall (243) of the ring body is 1.5mm to 5mm;

the included angle between the lower surface of the air guide part (231) and the vertical direction is 20-45 degrees.

7. The air duct assembly of claim 6,

the top end of the ring body (241) is higher than the bottom end of the air guide part (231) so that the ring body (241) and the air guide part (231) are partially structurally staggered;

the staggered size of the ring body (241) and the air guide part (231) is 0.5mm to 5mm.

8. The air duct assembly of claim 5,

the number of the supporting blocks (242) is more than or equal to 3; and/or

The distance between two adjacent supporting blocks (242) is more than or equal to 20mm; and/or

The ratio of the projection area of the air outlet (250) on the horizontal plane to the projection area of the supporting block (242) on the horizontal plane is 10-200.

9. The air duct assembly according to any one of claims 1-3,

the lower part of the container body (110) is contracted inwards to form a contraction part (113), and the container air inlet (112) is arranged on the contraction part (113);

the length of the container air inlet (112) in the vertical direction is larger than the length of the air outlet (250) in the vertical direction, and the air outlet (250) is located within the range of the container air inlet (112) in the vertical direction.

10. A cooking appliance, comprising:

a heating member (320); and

an air duct assembly as claimed in any one of claims 1 to 9, the heating member (320) being disposed in an air duct (20) of the air duct assembly with an air outlet face of the air supply member (310) facing the heating member (320).

11. The cooking appliance of claim 10,

the heating member (320) includes an annular heat generating pipe (321); or

The heating element (320) comprises an annular heating pipe (321) and a plurality of heat transfer sheets (322) arranged around the annular heating pipe (321), and the extending direction of the heat transfer sheets (322) faces to the center of the air duct (20).

12. The cooking appliance of claim 11,

under the condition that the heating element (320) comprises a heat transfer sheet (322), the heat transfer sheet (322) is a circular sheet, and a plurality of heat transfer sheets (322) are arranged on the periphery of the annular heating pipe (321) at intervals along the circumferential direction of the annular heating pipe (321); or

The heat transfer sheet (322) is spirally wound on the periphery of the annular heating tube (321) along the circumferential direction of the annular heating tube (321).

13. The cooking appliance of claim 12,

the included angle between the extending direction of one heat transfer sheet (322) which can be tangent to the extension line of the axis of the air supply part (310) in the plurality of heat transfer sheets (322) and the axis of the air supply part (310) is an obtuse angle; and/or

The pipe diameter of the annular heating pipe (321) is 5mm to 8mm; and/or

The heat transfer sheet (322) has a diameter of 10mm to 25mm.

14. The cooking appliance of claim 11,

the annular heating tube (321) is divided into a plurality of sub-tube sections from the air outlet surface of the air supply member (310), and the power of the sub-tube sections is gradually reduced along the flowing direction of the air outlet airflow of the air supply member (310).

15. The cooking appliance of claim 14,

the lowest power one of the plurality of sub-pipe sections is a low-power sub-pipe section (3213), the annular heating pipe (321) comprises a cold end (3214) and a wiring part (3215), and the cold end (3214) and the wiring part (3215) are located in the low-power sub-pipe section (3213).

16. The cooking appliance of any one of claims 10 to 15, further comprising:

the pot cover (120) can be covered on the container body (110) of the air duct assembly, the pot cover (120) comprises a cover body (121), a lifting handle (122) arranged on the cover body (121), and an exhaust hole (1221) communicated with the inside of the container body (110) is formed in the lifting handle (122).

17. The cooking appliance of any one of claims 10 to 15, further comprising:

the heat preservation cover (40) is arranged below the air duct (20), and the heat preservation cover (40) is used for heat insulation;

the heating disc assembly (50) is arranged on the heat preservation cover (40), the air duct (20) is annular, and the heating disc assembly (50) is located in the middle of the air duct (20) and can heat the container body (110) of the air duct assembly.

18. The cooking appliance according to any one of the claims 10 to 15, wherein the cooking appliance further comprises a base assembly (60), the base assembly (60) comprises a base (610) and an upper cover (620), the upper cover (620) covers the base (610) and encloses with the base (610) to form a receiving cavity, the air duct assembly is arranged in the receiving cavity, the upper cover (620) has a through hole in the middle for receiving the container body (110), and the container body (110) is detachably mounted on the base assembly (60) through the through hole.

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