CN219895430U - Household cooking appliance - Google Patents

Abstract

The utility model discloses a household cooking appliance. The household cooking appliance comprises a cavity, a supporting frame and a food basket. The support frame is detachably arranged in the cavity and comprises a central part and a plurality of support arms, the central part is provided with a central through hole, and the plurality of support arms are distributed at intervals around the circumference of the central through hole; the food basket is detachably arranged on the supporting frame, and is provided with a first air inlet communicated with the central through hole. According to the household cooking appliance, the central through hole is formed in the central part of the supporting frame, and the first air inlet communicated with the central through hole is formed in the food basket, so that air flow can pass through the first air inlet in the central part and enter the central area of the cavity, the temperature of the central area of the cavity is increased, and the problem of uneven heating of various parts of food due to low temperature of the central area of the cavity is solved.

Description

Household cooking appliance

Technical Field

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

Background

The air fryer uses a hot air convection circulation system to quickly take away moisture on the surface of food through hot air, so that the food achieves the frying effect. Because of the way of hot air circulation in the fryer cavity, the temperature of the central area in the fryer cavity is lower than the temperature of the surrounding area, so that the air fryer can heat food unevenly, the cooking doneness of each part of the food is different, and the food effect is affected. Therefore, how to design an air fryer that can uniformly heat portions of food is a challenge.

Disclosure of Invention

The utility model provides a household cooking appliance.

The household cooking appliance of the embodiment of the utility model comprises:

a cavity;

the support frame is detachably arranged in the cavity and comprises a central part and a plurality of support arms, wherein the central part is provided with a central through hole, and the plurality of support arms are distributed at intervals around the circumference of the central through hole;

the food basket is detachably arranged on the supporting frame and is provided with a first air inlet communicated with the central through hole.

According to the household cooking appliance, the central through hole is formed in the central part of the supporting frame, and the first air inlet communicated with the central through hole is formed in the food basket, so that air flow can pass through the first air inlet in the central part and enter the central area of the cavity, the temperature of the central area of the cavity is increased, and the problem of uneven heating of various parts of food due to low temperature of the central area of the cavity is solved.

In some embodiments, the food basket comprises a bottom wall and a side wall connected to the bottom wall, the bottom wall is abutted against the supporting arm, the bottom wall is provided with at least one first air inlet, and the first air inlet penetrates through the bottom wall.

In some embodiments, the side wall is provided with a second air inlet that extends through the side wall.

In some embodiments, the central portion includes a first wall and a second wall connected to an upper end of the first wall, the first wall and the second wall together enclosing the central through hole, the second wall having an inner diameter less than an inner diameter of the first wall.

In certain embodiments, the food basket is supported on the end of the second enclosure wall and the support arm.

In some embodiments, the first surrounding wall is provided with a first air inlet slot penetrating through the first surrounding wall along the thickness direction of the first surrounding wall, and the first air inlet slot is communicated with the central through hole.

In some embodiments, the first air inlet slot is located between two adjacent support arms.

In some embodiments, the second surrounding wall is provided with a second air inlet slot penetrating through the second surrounding wall along the thickness direction of the second surrounding wall, and the second air inlet slot is communicated with the central through hole.

In some embodiments, the second air inlet slot is located between two adjacent support arms.

In some embodiments, each of the support arms includes an air guiding surface that guides air flow to the first air intake corresponding to the central portion.

In certain embodiments, the wind guide is curved.

In certain embodiments, the household cooking appliance further comprises a heating plate, a detection probe and a liner, wherein the heating plate is arranged in the cavity, the detection probe is movably arranged in the heating plate, and the liner is selectively arranged on the heating plate;

when the inner container is positioned outside the cavity, the supporting frame is arranged on the heating plate, and the detection probe part protrudes out of the upper surface of the heating plate and stretches into the central through hole;

when the inner container is arranged on the heating plate, the supporting frame is arranged in the inner container, and the inner container props against the detection probe so that the detection probe is completely accommodated in the heating plate.

In some embodiments, the aperture of the portion of the central throughbore that receives the inspection probe is greater than the outer diameter of the inspection probe.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The foregoing and/or additional aspects and advantages of the present utility model will become apparent and readily appreciated 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 household cooking appliance according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an assembled structure of a food basket and a support frame according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a support frame according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a household cooking appliance according to an embodiment of the present utility model.

Description of main reference numerals: a household cooking appliance 100; a cavity 10; a support frame 20; a center portion 21; a support arm 22; a housing 101; a central through hole 23; a food basket 30; a first air inlet 31; a bottom wall 32; a side wall 33; a second air inlet 34; a first enclosure wall 210; a second surrounding wall 211; a first air intake slot 2101; a second air intake slot 2102; an air guiding surface 220; a connecting rib 221; a heating plate 40; an upper surface 41 of the heating plate; a detection probe 50; and a liner 60.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

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", 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 referred to must have a specific orientation, be configured and operated in a specific orientation, and thus 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 one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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 "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 and 2, a household cooking appliance 100 according to an embodiment of the present utility model includes a cavity 10, a support frame 20, and a food basket 30. The support frame 20 is detachably arranged in the cavity 10, the support frame 20 comprises a central part 21 and a plurality of support arms 22, the central part 21 is provided with a central through hole 23, and the plurality of support arms 22 are arranged at intervals around the circumference of the central through hole 23; the food basket 30 is detachably provided on the supporting frame 20, and the food basket 30 is provided with a first air inlet 31 communicated with the central through hole 23.

In the household cooking appliance 100 of the embodiment of the utility model, the central through hole 23 is arranged at the central part 21 of the supporting frame 20, and the first air inlet 31 communicated with the central through hole 23 is arranged at the food basket 30, so that air flow can pass through the first air inlet 31 at the central part 21 and enter the central area of the cavity 10, thereby raising the temperature of the central area of the cavity 10, and further solving the problem of uneven heating of each part of food caused by lower temperature of the central area of the cavity 10.

In particular, the household cooking appliance 100 may be an air fryer or other appliance employing the high-speed airflow circulation principle. The cavity 10 may be of a regular shape, such as a cylinder, a truncated cone, etc., or may be of an irregular shape. For ease of manufacture, the cavity 10 of the present embodiment is configured in a cylinder-like structure. The cavity 10 may be a sealed structure, the cavity 10 is formed by the housing 101 of the household cooking appliance 100, and when the household cooking appliance 100 is in an operating state, the air flow may circulate in the cavity 10, and further, the air flow may circulate in the cavity 10 at a high speed. Accordingly, the housing 101 forming the cavity 10 should be made of a material having a certain impact resistance, for example, the housing 101 may be made of stainless steel, aluminized, or the like. The direction of the air flow is shown in the figure in dashed lines with arrows.

In the present embodiment, the support 20 is disposed at the bottom of the chamber 10, and further, the support 20 is disposed at the bottom center of the chamber 10, or the central axis of the central portion 21 of the support 20 and the central axis of the chamber 10 are the same axis. The support 20 may also be disposed in the middle of the cavity 10, that is, the support 20 is suspended in the cavity 10, and the support 20 may even be disposed at any position in the cavity 10.

The support frame 20 may have a regular structure, such as an axisymmetric structure, a centrosymmetric structure, or the like, or may have an irregular structure. Alternatively, the support frame 20 is a centrally symmetrical structure, and the plurality of support arms 22 extend in a direction away from the central portion 21 with the central portion 21 as a center. The support arms 22 may be three, four, five or more, which is not limited in this embodiment of the present utility model, and the support arms 22 may have included angles between different support parts, and the included angles between the support parts may be 60 °, 90 °, 120 °, or the like. For example, the number of the support arms 22 is four, and the four support arms 22 are arranged at intervals of 90 ° two by two around the central axis of the central through hole 23. The plurality of support arms 22 may provide a guiding function for the airflow within the chamber 10, the air flow contacts support arm 22 and is directed in different directions to create a circulation of the air flow.

The food basket 30 is used for holding food, and the shape of the food basket 30 may be a regular shape, such as a cylinder, a truncated cone, etc., or an irregular shape. The shape of the food basket 30 may be adapted to the shape of the cavity 10 for ease of manufacture and aesthetic appeal. The first air inlet 31 is along the gravity direction of the food basket 30, the food basket 30 may be supported by the support frame 20, i.e., the food basket 30 may be disposed above the support frame 20, the central through hole 23 and the first air inlet 31 are spaced apart along the direction, and the air flow may circulate between the central through hole 23 and the first air inlet 31. The air flow circulates in the cavity 10 from the space between the food basket 30 and the cavity 10 and further flows to the first air inlet 31 through the central through hole 23, thereby contacting the food placed on the food basket 30.

The central through hole 23 and the first air inlet 31 may be regular, such as circular, square, or irregular. For ease of manufacture, the central through hole 23 and the first air inlet 31 of the embodiment of the present utility model are both configured in a circular shape.

Referring to fig. 1 and 2, in some embodiments, the food basket 30 includes a bottom wall 32 and a side wall 33 connected to the bottom wall 32, the bottom wall 32 abuts against the support arm 22, the bottom wall 32 is provided with at least one first air inlet 31, and the first air inlet 31 penetrates through the bottom wall 32.

Thus, the distance between the first air inlet 31 and the central through hole 23 is small, and the air flow rate introduced into the first air inlet 31 from the central through hole 23 is large. Also, the first air intake opening 31 provided on the bottom wall 32 is easy to manufacture.

Specifically, the bottom wall 32 and the side wall 33 may be integrally formed or may be formed separately. For example, the bottom wall 32 and the side walls 33 may be formed by a drawing process from a single sheet of material. The first air inlet 31 is a through hole penetrating the bottom wall 32, and air flow can enter the food basket 30 through the first air inlet 31 and circulate in the food basket 30. The number of first air inlets 31 may be one, two, three or even more. For example, the number of the first air inlets 31 may be fifteen, and the fifteen first air inlets 31 are disposed on the bottom wall 32 at intervals with the central axis of the bottom wall 32 as the symmetry axis along the length direction of the bottom wall 32.

Referring to fig. 1 and 2, in some embodiments, the side wall 33 is provided with a second air inlet 34, and the second air inlet 34 penetrates through the side wall 33.

In this way, the flow rate of the air flowing into the food basket 30 will be increased, and the air will flow towards the central area of the cavity 10 after passing through the second air inlet 34, so as to further increase the temperature of the central area of the cavity 10, thereby solving the problem of uneven heating of various parts of the food caused by the lower temperature of the central area of the cavity 10.

Specifically, the number of the second air inlets 34 may be three, four, five or more, the plurality of second air inlets 34 may be disposed on the side wall 33 at intervals, and the arrangement manner of the plurality of second air inlets 34 may be determined according to the requirement, which is not limited in the embodiment of the present utility model. The shape of the second air inlet 34 may be regular or irregular. For example, the second air intake 34 may be in the shape of a waist-shaped hole.

Referring to fig. 1 and 3, in some embodiments, the central portion 21 includes a first wall 210 and a second wall 211 connected to an upper end of the first wall 210, the first wall 210 and the second wall 211 together defining a central through hole 23, an inner diameter h2 of the second wall 211 being smaller than an inner diameter h1 of the first wall 210, and the food basket 30 being supported on an end of the second wall 211 and the support arm 22.

Thus, the food basket 30 has a large supporting area, the food basket 30 is not easy to shake in the use process, and the central part 21 has a stable structure and high reliability.

Specifically, the second surrounding wall 211 protrudes from the first surrounding wall 210 in the axial direction of the central through hole 23. The first and second walls 210 and 211 may be integrally formed or may be formed separately. The wall thicknesses of the first and second walls 210, 211 may or may not be equal. The first and second perimeter walls 210, 211 and the support arm 22 may be integrally formed or may be formed separately. The support arm 22 may protrude radially from the first and second peripheral walls 210, 211 beyond the first and second peripheral walls 210, 211 and extend in a direction away from the first and second peripheral walls 210, 211, and the support arm 22 may be regular or irregular in shape. The support arm 22 is used to support the food basket 30 and to direct the direction of the airflow within the chamber 10.

Referring to fig. 1 and 3, in some embodiments, the first surrounding wall 210 may be provided with a first air intake slot 2101 penetrating the first surrounding wall 210 along the thickness direction of the first surrounding wall 210, and the first air intake slot 2101 is located between two adjacent supporting arms 22 and communicates with the central through hole 23.

In this way, the first air inlet slot 2101 increases the airflow rate passing through the first air inlet 31, so that the temperature of the central area of the cavity 10 is increased, and the problem of uneven heating of various parts of food caused by lower temperature of the central area of the cavity 10 is solved.

Specifically, the number of the first air intake slots 2101 may be plural, for example, the number of the first air intake slots 2101 may be two, three, four or even more. Alternatively, the number of the first air intake grooves 2101 is four, and the four first air intake grooves 2101 are disposed around the central through hole 23.

The first air intake slot 2101 is used for air flow to pass through, so that the air flow rate flowing to the first air intake 31 is increased. It will be appreciated that after the air flows to the region of the support frame 20, the air is guided by the support arms 22 of the support frame 20, and if the first air inlet slot 2101 is not formed, a portion of the air guided to the first enclosure wall 210 may be lost, so that the temperature rise in the central region of the cavity 10 is not obvious.

Of course, in other embodiments, the first air intake slot 2101 may be omitted.

Referring to fig. 1 and 3, in some embodiments, the second peripheral wall 211 may be provided with a second air intake groove 2102 penetrating the second peripheral wall 211 in a thickness direction of the second peripheral wall 211, and the second air intake groove 2102 is located between two adjacent support arms 22 and communicates with the central through hole 23.

In this way, the second air inlet slot 2102 increases the airflow rate passing through the first air inlet 31, so that the temperature of the central area of the cavity 10 is increased, and the problem of uneven heating of various parts of food due to the low temperature of the central area of the cavity 10 is solved.

Specifically, the number of the second air intake grooves 2102 may be plural, for example, the number of the second air intake grooves 2102 may be two, three, four or even more. Alternatively, the number of the second air intake grooves 2102 is four, and four second air intake grooves 2102 are disposed around the central through hole 23. The second air intake slot 2102 is used for passing air flow, so that the air flow rate flowing to the first air intake 31 is increased. It will be appreciated that after the air flows to the region of the support frame 20, the air is guided by the support arms 22 of the support frame 20, and if the second air inlet slot 2102 is not formed, a portion of the air guided to the second wall 211 may be lost, so that the temperature rise in the central region of the cavity 10 is not obvious.

Of course, in other embodiments, the second air intake slot 2102 may be omitted.

Referring to fig. 1 and 3, in some embodiments, each support arm 22 includes a wind guiding surface 220, and the wind guiding surface 220 guides airflow to the first wind inlet 31 corresponding to the central portion 21.

In this way, the flow rate of the air flowing to the area of the first air inlet 31 is increased, so that the temperature of the central area of the cavity 10 is increased, and the problem of uneven heating of various parts of the food caused by the lower temperature of the central area of the cavity 10 is solved.

Specifically, one support arm 22 may have multiple air guiding surfaces 220, for example, one support arm 22 may have two air guiding surfaces 220, which two air guiding surfaces 220 may be on opposite outer surfaces of support arm 22. The air guiding surface 220 may be a plane or a curved surface. After the air flow reaches the supporting arm 22 area, the air guiding surface 220 applies an air flow reaction force to promote the air flow to the first air inlet 31 along the air guiding surface 220, so that the air flow in the central area of the cavity 10 is improved, and the problem of uneven heating of various parts of food due to low temperature in the central area of the cavity 10 is solved.

Referring to fig. 1 and 3, in some embodiments, the air guiding surface 220 is curved.

In this way, the flow speed of the air flow along the air guiding surface 220 is increased, so that the flow rate of the air flow conveyed to the first air inlet 31 is effectively increased, the temperature of the central area of the cavity 10 is increased, and the problem of uneven heating of various parts of food due to the lower temperature of the central area of the cavity 10 is solved.

Specifically, the wind guiding surface 220 is fitted by a function, and the wind guiding surface 220 may be a curved surface formed by a curve having at least one standing point or a curved surface formed by a curve having no standing point. For ease of manufacturing, the air guiding surface 220 of the embodiment of the present utility model may be a curved surface formed by a curve without a stagnation point. In the radial direction of the support arm 22 and the first enclosing wall 210, one end facing away from the support arm 22 and the first enclosing wall 210 toward the first air intake 31 may be provided with a connection rib 221.

The connecting ribs 221 define the radial dimension of the air guiding surface 220 along the supporting arm 22, and the connecting ribs 221 can ensure that the air flows along the air guiding surface 220, so as to avoid leakage of the air in the flowing process, that is, the air does not flow to the first air inlet 31 under the guidance of the air guiding surface 220. Meanwhile, the connection ribs 221 can ensure the connection stability between the support arm 22 and the first surrounding wall 210, and improve the structural stability of the support frame 20.

Referring to fig. 1 and 4, in some embodiments, the household cooking appliance 100 further includes a heating plate 40, a sensing probe 50, and a liner 60, the heating plate 40 is disposed in the cavity 10, the sensing probe 50 is movably disposed in the heating plate 40, and the liner 60 is selectively disposed on the heating plate 40; when the inner container 60 is positioned outside the cavity 10, the supporting frame 20 is arranged on the heating plate 40, and the detection probe 50 partially protrudes out of the upper surface 41 of the heating plate 40 and stretches into the central through hole 23; when the inner container 60 is arranged on the heating plate 40, the supporting frame 20 is arranged in the inner container 60, and the inner container 60 presses the detection probe 50 so that the detection probe 50 is completely accommodated in the heating plate 40.

In this way, the detection probe 50 can detect whether the liner 60 is in place, thereby avoiding the safety risk caused by the liner 60 not being in place.

Specifically, the heating plate 40 may be disposed at the bottom of the cavity 10, or may be disposed in the middle of the cavity 10, that is, the heating plate 40 is suspended in the cavity 10, and the heating plate 40 may even be disposed at any position in the cavity 10. The detection probe 50 may be provided on the housing 101 of the home cooking appliance 100, and the front projection of the detection probe 50 may be located in the heating pan 40. The central region of the heating plate 40 may have a slot through which the sensing probe 50 may be disposed at the center of the heating plate 40. The detection probe 50 may be provided in the central region of the heating plate 40, or may be provided in other regions of the heating plate 40.

The material of the liner 60 may be a material that is resistant to high temperatures and is not easily corroded, such as stainless steel, ceramic, etc. The inner container 60 may be manufactured by a deep drawing process, and the inner container 60 may be directly placed on the heating plate 40. Further, the method comprises the steps of, the outer surface of the bottom of the inner container 60 is in direct contact with the heating plate 40. When the inner container 60 is placed on the heating plate 40, since the cooking appliance of the inner container 60 has no slot or opening, the inner container 60 contacts the detecting probe 50 disposed in the heating plate 40, further the inner container 60 will press the detecting probe 50, and when the detecting probe 50 is pressed, the detecting probe 50 will be recessed into the upper surface 41 of the heating plate 40, or the highest point of the detecting probe 50 is lower than the plane of the upper surface 41 of the heating plate 40 along the axial direction of the detecting probe 50. Wherein the movement of the detection probe 50 with respect to the upper surface of the heating plate 40 can be achieved by means of a spring or the like. The sensing probe 50 may be turned on to a control system built in the home cooking appliance 100, and the home cooking appliance 100 may be put into an operating state, for example, an internal circuit is turned on, cooking may be started, etc., after the sensing probe 50 is recessed into the upper surface 41 of the heating plate 40.

Referring to fig. 1 and 4, in some embodiments, the aperture v1 of the portion of the central through hole 23 that receives the inspection probe 50 is greater than the outer diameter v2 of the inspection probe 50.

In this way, the detection probe 50 does not interfere with the hole wall of the central through hole 23, so that the support frame 20 of the food basket 30 is ensured not to touch the detection probe 50 by mistake.

Specifically, the detection probe 50 does not interfere with the center through hole 23 in the axial direction and the radial direction of the center through hole 23, regardless of whether the liner 60 is placed or not.

In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A household cooking appliance, comprising:

a cavity;

the support frame is detachably arranged in the cavity and comprises a central part and a plurality of support arms, wherein the central part is provided with a central through hole, and the plurality of support arms are distributed at intervals around the circumference of the central through hole;

the food basket is detachably arranged on the supporting frame and is provided with a first air inlet communicated with the central through hole.

2. The household cooking appliance of claim 1, wherein the food basket comprises a bottom wall and a side wall connecting the bottom wall, the bottom wall resting on the support arm, the bottom wall being provided with at least one first air inlet opening extending through the bottom wall.

3. The household cooking appliance of claim 2, wherein the side wall is provided with a second air inlet, the second air inlet penetrating the side wall.

4. The household cooking appliance according to claim 1, wherein the central portion comprises a first wall and a second wall connected to an upper end of the first wall, the first wall and the second wall together enclosing the central through hole, an inner diameter of the second wall being smaller than an inner diameter of the first wall.

5. The household cooking appliance of claim 4, wherein the food basket is supported on an end of the second enclosure wall and the support arm.

6. The household cooking appliance as claimed in claim 4, wherein the first surrounding wall is provided with a first air inlet groove penetrating through the first surrounding wall in a thickness direction of the first surrounding wall, and the first air inlet groove communicates with the central through hole.

7. The household cooking appliance of claim 6, wherein the first air inlet slot is located between two adjacent support arms.

8. The household cooking appliance as claimed in claim 4, wherein the second surrounding wall is provided with a second air inlet groove penetrating through the second surrounding wall in a thickness direction of the second surrounding wall, and the second air inlet groove communicates with the central through hole.

9. The household cooking appliance of claim 8, wherein the second air intake slot is located between two adjacent support arms.

10. The household cooking appliance of claim 1, wherein each support arm comprises an air guiding surface that guides an air flow to the first air intake corresponding to the central portion.

11. The household cooking appliance of claim 10, wherein the air guide surface is curved.

12. The household cooking appliance of claim 1, further comprising a heating plate disposed in the cavity, a detection probe movably disposed in the heating plate, and a liner selectively disposed on the heating plate;

when the inner container is positioned outside the cavity, the supporting frame is arranged on the heating plate, and the detection probe part protrudes out of the upper surface of the heating plate and stretches into the central through hole;

when the inner container is arranged on the heating plate, the supporting frame is arranged in the inner container, and the inner container props against the detection probe so that the detection probe is completely accommodated in the heating plate.

13. The household cooking appliance of claim 12, wherein the portion of the central through bore housing the detection probe has a larger aperture than an outer diameter of the detection probe.