Fan structure and steaming and baking all-in-one machine comprising same

Abstract

The utility model relates to the technical field of kitchen household appliances, and provides a fan structure and a steaming and baking integrated machine comprising the same. The fan structure comprises a rotating shaft and a fan blade set connected to the rotating shaft. The fan blade group comprises a base part connected to the rotating shaft and a plurality of blades connected to the base part, and the blades are arranged in the circumferential direction of the rotating shaft at intervals; at least part of the blades comprise first turbulent flow parts and second turbulent flow parts which are connected and arranged at an angle, and the cross sections, in the axial direction of the rotating shaft, of the first turbulent flow parts are gradually expanded from inside to outside. According to the fan structure, turbulent flow superposition in different directions is utilized, the turbulent flow effect is improved, then the gas distribution uniformity is improved, and the aerodynamic efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen household appliances, in particular to a fan structure and a steaming, baking and sterilizing all-in-one machine comprising the same. BACKGROUND

[0002] The fan generally comprises a motor, a rotating shaft and blades, the blades are connected to the rotating shaft, and the rotating shaft is connected to the motor to realize rotation of the blades. In the related art, in the steaming and baking inner container, the fan is usually used in cooperation with a heating pipe to generate hot air for cooking food. However, the fan used at present still has the problem of low efficiency, which affects the overall cooking time. In addition, during the cooking process, the airflow in the steaming and baking inner container is still unevenly distributed, which leads to uneven doneness of the food. SUMMARY

[0003] Therefore, it is necessary to provide a fan structure which utilizes superposition of different direction disturbances to improve disturbance effect, thereby improving airflow distribution uniformity and aerodynamic efficiency.

[0004] A fan structure comprises a rotating shaft and a fan blade group connected to the rotating shaft. The fan blade group comprises a base connected to the rotating shaft and blades connected to the base. The blades are arranged in a plurality and are spaced apart along the circumference of the rotating shaft. At least part of the blades comprises a first disturbance part and a second disturbance part which are connected and arranged at an angle. The first disturbance part has a gradually expanding trend from inside to outside along the cross section of the rotating shaft in the axial direction.

[0005] It can be understood that the rotating shaft rotates to drive the blades to rotate synchronously through the base to accelerate the airflow. In this process, since at least part of the blades comprises the first disturbance part and the second disturbance part which are arranged at an angle, the first disturbance part and the second disturbance part can produce different direction disturbances on the airflow, thereby promoting interaction of different direction disturbances to improve the efficiency of the fan. Moreover, since the different direction disturbances are superimposed, the airflow distribution uniformity is improved. At the same time, since the first disturbance part has a gradually expanding trend from inside to outside along the cross section of the rotating shaft in the axial direction, i.e. the size close to the base is smaller than the side of the first disturbance part away from the base. By utilizing the gradually expanding first disturbance part, the airflow speed and distribution uniformity are further improved, thereby improving the aerodynamic efficiency.

[0006] In some embodiments, the first disturbance part comprises a connecting side and a disturbance side which are spaced apart along the circumference of the rotating shaft, and the second disturbance part is connected to the connecting side.

[0007] In the above embodiments, the distance between the disturbance side and the connecting side along the circumference of the rotating shaft gradually increases from inside to outside.

[0008] In some embodiments, the spoiler side comprises a tapered section, a straight section and an expanding section, which are sequentially connected from the base towards the edge of the blade periphery, and the straight section is substantially parallel to the connecting side.

[0009] In some embodiments, the length direction of the connecting side is arranged at an angle with the radial direction of the rotation axis.

[0010] In some embodiments, the first spoiler part is provided with the second spoiler part on both sides of the rotation axis in the axial direction.

[0011] In some embodiments, the fan structure is provided with an air inlet side and an air outlet side arranged in the axial direction of the rotation axis; the protruding length of the second spoiler part at the air outlet side is greater than the protruding length of the second spoiler part at the air inlet side.

[0012] In some embodiments, the first spoiler part and / or the second spoiler part is provided with an arc-shaped notch near the top corner of the blade edge; and / or, the first spoiler part and the second spoiler part are both provided in the form of a flat plate.

[0013] In some embodiments, the fan blade group is provided with two groups and is arranged in the axial direction of the rotation axis, and the second spoiler part corresponding to each group of the fan blade group is arranged on the side opposite to the corresponding first spoiler part.

[0014] The application also provides a steaming and baking integrated machine, which comprises a steaming and baking inner container, a sterilization inner container and the above-mentioned fan structure, the steaming and baking inner container and the sterilization inner container are arranged in a first direction and are provided with an assembly gap, at least the steaming and baking inner container is provided with a ventilation opening communicating with the assembly gap, and the fan structure is arranged in the assembly gap and is located at the ventilation opening.

[0015] In one embodiment, the steaming and baking inner container and the sterilization inner container are both provided with the ventilation opening, one group of the fan blade group in the fan structure is arranged at one ventilation opening, and the other group of the fan blade group is arranged at the other ventilation opening. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 The schematic diagram of the fan structure provided by an embodiment of the application;

[0018] Figure 2 A front view of a fan structure is provided. Figure 1 A front view of a fan structure is provided.

[0019] Figure 3 A schematic view of a fan structure is provided for another embodiment of the present application.

[0020] Figure 4 A front view of a fan structure is provided. Figure 3 A front view of a fan structure is provided.

[0021] Figure 5 A first partial schematic view of a steaming-baking-disinfecting all-in-one machine is provided for an embodiment of the present application.

[0022] Figure 6 A second partial schematic view of a steaming-baking-disinfecting all-in-one machine is provided for an embodiment of the present application.

[0023] 10, fan structure; 11, rotating shaft; 12, fan blade group; 12a, first fan blade group; 12b, second fan blade group; 13, rotating support; 14, power source; 20, steaming-baking inner container; 30, disinfecting inner container; 40, fan baffle; 50, heating pipe; 111, first shaft segment; 112, second shaft segment; 121, base; 122, blade; 201, first ventilation opening; 301, second ventilation opening; 1201, connecting edge side; 1202, turbulence edge side; 1202a, tapered segment; 1202b, straight segment; 1202c, expanding segment; 1221, first turbulence portion; 1222, second turbulence portion; 1223, arc-shaped gap; 1224, reinforcing rib. DETAILED DESCRIPTION

[0024] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and it is intended that the present application cover all such modifications and changes. Thus, the present application should not be limited by the specific embodiments set forth below.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set to" or "disposed to" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are used for illustrative purposes only and are not intended to be limiting.

[0026] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0027] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0029] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a fan structure 10, comprising a rotating shaft 11 and a fan blade group 12 connected to the rotating shaft 11, the fan blade group 12 comprising a base 121 connected to the rotating shaft 11 and a blade 122 connected to the base 121, the blade 122 being provided with a plurality of and being arranged in a circumferential direction of the rotating shaft 11. The rotating shaft 11 is used to connect a motor, and under the action of the motor, the plurality of blades 122 are driven to rotate synchronously by the base 121 to accelerate airflow. The base 121 is provided to improve the assembly reliability of each blade 122 relative to the rotating shaft 11. Among them, the base 121 is integrally formed with the plurality of blades 122, for example, integrally formed by machining. The base 121 is stamped with a protrusion at a position close to the middle part, so as to connect the rotating shaft 11 by using the protrusion, so that the mounting position of the base 121 relative to the rotating shaft 11 is closer to the end part of the rotating shaft 11, and the assembly interference is reduced.

[0030] The first and second turbulence portions 1221 and 1222 are connected and arranged at an angle, and the first turbulence portion 1221 has a gradually expanding cross section along the axial direction of the rotating shaft 11 from the inside to the outside. It can be understood that, due to the arrangement of the first and second turbulence portions 1221 and 1222 arranged at an angle, when the blades 122 rotate with the rotating shaft 11, the first and second turbulence portions 1221 and 1222 can act on the airflow, thereby generating different direction shear forces on the airflow, that is, different direction turbulence effects, thereby improving the aerodynamic efficiency and facilitating uniform distribution of the gas. At the same time, the first turbulence portion 1221 has a gradually expanding cross section along the axial direction of the rotating shaft 11 from the inside to the outside, that is, from the base 121 to the outer peripheral edge of the blade 122. Such an arrangement, on the one hand, ensures that the size near the base 121 is small, reducing the connection interference of each blade 122 relative to the base 121; on the other hand, the gradually expanding arrangement further improves the airflow speed and uniform distribution of the airflow, thereby improving the aerodynamic efficiency. When the fan structure 10 is used in the steaming and roasting inner container, it can promote the uniform distribution of hot air in the steaming and roasting inner container, and ensure that the cooking effect with consistent doneness is achieved in a relatively short cooking time.

[0031] In actual use, each blade 122 can include the first and second turbulence portions 1221 and 1222.

[0032] Please continue to refer to Figure 1 and Figure 2 For example, the first and second turbulence portions 1221 and 1222 are both arranged as flat plates. The thickness direction of the first turbulence portion 1221 is along the axial direction of the rotating shaft 11, and the thickness direction of the second turbulence portion 1222 is arranged at an angle to the thickness direction of the first turbulence portion 1221, for example, can be perpendicular. Such an arrangement not only enhances the turbulence effect, but also optimizes the overall structural stability of the fan. It is due to the flat plate arrangement of the first turbulence portion 1221 along the radial direction of the rotating shaft 11 that a circumferential shear force is generated on the airflow, which can effectively guide the airflow, reduce resistance, and improve the operating efficiency of the fan. At the same time, the second turbulence portion 1222 perpendicular to the first turbulence portion 1221 is arranged to generate radial and axial shear forces on the airflow, further enhancing the turbulence of the airflow, so that the airflow can be more uniformly distributed during the rotation of the fan blade, reducing the generation of local vortex. In this way, when it is applied to the steaming and roasting inner container, it can significantly improve the hot air circulation effect of the steaming and roasting inner container, ensuring uniform heating of the food.

[0033] Please continue to refer to Figure 1 and Figure 2Further, the first spoiler portion 1221 comprises a connecting side 1201 and a spoiler side 1202, both of which are arranged along the circumference of the rotating shaft 11, and the second spoiler portion 1222 is connected to the connecting side 1201. The distance between the spoiler side 1202 and the connecting side 1201 along the circumference of the rotating shaft 11 gradually increases from inside to outside. That is, the spoiler side 1202 is arranged obliquely relative to the connecting side 1201, so that the cross section of the first spoiler portion 1221 gradually increases from inside to outside. Such an arrangement can improve the connection reliability of the second spoiler portion 1222 and the first spoiler portion 1221, facilitate processing, and reduce stress concentration; on the other hand, it can improve the spoiler effect.

[0034] The spoiler side 1202 comprises a tapered section 1202a, a straight section 1202b, and an expanding section 1202c, which are connected in turn from the base 121 to the outer peripheral edge of the blade 122, and the straight section 1202b is substantially parallel to the connecting side 1201. That is, the straight section 1202b is connected between the tapered section 1202a and the expanding section 1202c, and one end of the tapered section 1202a away from the straight section 1202b is connected to the base 121. The tapered section 1202a and the expanding section 1202c are both arranged obliquely relative to the straight section 1202b, so that the cross-sectional width of the first spoiler portion 1221 first gradually decreases, then remains unchanged, and then gradually increases. Such an arrangement not only reduces the assembly interference of any two adjacent blades 122 and ensures that there is sufficient space between any two adjacent blades 122 for airflow to flow and be disturbed, but also ensures that the blade 122 and the base 121 have high connection strength. The connection part of the blade 122 and the base 121 is provided with a rounded corner to reduce stress concentration.

[0035] Further, the blade 122 is provided with a reinforcing rib 1224, which extends from the base 121 to the middle or tends to the middle of the straight section 1202b of the first spoiler portion 1221. The reinforcing rib 1224 can be formed by stamping the blade 122 and the base 121. The use of the reinforcing rib 1224 improves the structural strength of the blade 122 group. The length direction of the reinforcing rib 1224 is the same as that of the straight section 1202b and the connecting side 1201, and the three can be arranged in parallel.

[0036] Please continue to refer to Figure 1 and Figure 2 In some optional embodiments, the length direction of the connecting side 1201 is arranged at an angle with the radial direction of the rotating shaft 11. Since the connecting side 1201 is connected to the second spoiler portion 1222, such an arrangement is equivalent to arranging the second spoiler portion 1222 at an angle with the radial direction. In this way, the second spoiler portion 1222 can generate components in different directions, improving the spoiler effect.

[0037] AsFigure 1 As shown, as some exemplary, the first turbulence portion 1221 is provided with a second turbulence portion 1222 on both sides of the axial direction of the rotating shaft 11. Such a setting ensures that the airflow on both sides of the thickness direction of the first turbulence portion 1221 can disturb the second turbulence portion 1222, further improving the aerodynamic efficiency. In actual use, the fan structure 10 has an air inlet side and an air outlet side, and the two are arranged in the axial direction of the rotating shaft 11. The protruding length of the second turbulence portion 1222 on the air outlet side is greater than the protruding length of the second turbulence portion 1222 on the air inlet side. It can be understood that when the fan structure 10 is applied to the steaming and roasting inner container, the side with a larger protruding length of the second turbulence portion 1222 compared to the first turbulence portion 1221 faces the middle part of the steaming and roasting inner container.

[0038] Further, the first turbulence portion 1221 and the second turbulence portion 1222 are both provided with an arc-shaped notch 1223 near the top corner of the outer peripheral edge of the blade 122. By using the arc-shaped notch 1223, the stress concentration at the top corner can be weakened, and the influence of the turbulent flow on the airflow can be slowed down, so as to ensure the smooth flow of the airflow on the basis of as large a disturbance as possible. In addition, such a setting can improve the structural strength of the blade 122 and reduce the interference with other structures, especially the stress concentration when colliding.

[0039] Please combine Figures 1 to 4 In actual use, the fan blade group 12 is provided with two groups and is arranged in the axial direction of the rotating shaft 11. The corresponding second turbulence portion 1222 in each group of fan blade groups 12 is arranged on the side opposite to the corresponding first turbulence portion 1221. That is, such a setting allows the air outlet sides of each group of fan blade groups 12 to be arranged opposite to each other and reduces the assembly interference between the groups of fan blade groups 12.

[0040] Further, the fan structure 10 further includes a rotating support 13 provided with an assembly hole for the rotating shaft 11 to pass through; and the fan structure 10 further includes a power source 14 fixedly arranged on the rotating support 13 and connected to the rotating shaft 11. The power source 14 drives the rotating shaft 11 to rotate relative to the rotating support 13 around its own axis, thereby driving the fan blade group 12 to rotate synchronously. The rotating support 13 can install the fan structure 10 to a target position, for example, the rotating support 13 can be connected with the inner container wall of the steaming and roasting inner container. The power source 14 adopts an electric motor.

[0041] For the two groups of fan blade groups 12, the rotating shaft 11 includes a first shaft segment 111 and a second shaft segment 112, which are connected through a shaft coupling. The first shaft segment 111 is connected with one of the groups of fan blade groups 12, and the second shaft segment 112 is connected with the other group of fan blade groups 12. One of the first shaft segment 111 and the second shaft segment 112 is connected with the electric motor, and of course one of them can be the motor shaft of the electric motor. This is only an example.

[0042] Please refer to Figures 3 to 6 In still another embodiment of the present application, a steaming and baking integrated machine is provided, which comprises a steaming and baking inner container 20, a sterilizing inner container 30, and the above-mentioned fan structure 10. The steaming and baking inner container 20 and the sterilizing inner container 30 are arranged in a first direction with an assembly gap therebetween, and at least the steaming and baking inner container 20 is provided with a ventilation port communicating with the assembly gap. The fan structure 10 is arranged in the assembly gap and located at the ventilation port. In actual use, the steaming and baking inner container 20 corresponds to a first ventilation port 201, and is provided with a heating pipe 50 at the first ventilation port 201. The heating pipe 50 can be arranged around the outer circumferential side of the corresponding fan blade group 12 to heat the air flow generated by the fan blade group 12, thereby maintaining the hot air in the steaming and baking inner container 20.

[0043] In actual use, the sterilizing inner container 30 is provided with a second ventilation port 301, and one group of fan blade groups 12 in the fan structure 10 is arranged at the first ventilation port 201, and another group of fan blade groups 12 is arranged at the second ventilation port 301. Specifically, the sterilizing inner container 30 corresponds to the second fan blade group 12b, and the steaming and baking inner container 20 corresponds to the first fan blade group 12a. The first fan blade group 12a is used for air circulation of the steaming and baking inner container 20, and the second fan blade group 12b is used for air circulation of the sterilizing inner container 30, so as to improve the sterilization and drying effect in the sterilizing inner container 30.

[0044] In actual use, the first ventilation port 201 and the second ventilation port 301 are each provided with a fan baffle 40, and each fan baffle 40 is provided with a plurality of ventilation holes arranged at intervals, which is beneficial to air flow. The fan baffle 40 is used for protecting the fan structure 10 from being interfered by food materials, tableware, etc. to affect rotation. Specifically, a first recess can be arranged corresponding to the wall of the steaming and baking inner container 20, so as to accommodate the first fan blade group 12a and the corresponding heating pipe 50; and the fan baffle 40 corresponding to the sterilizing inner container 30 is provided with a second recess, so as to accommodate the second fan blade group 12b.

[0045] The sterilization inner container 30 is provided with a sterilization lamp and a heating lamp. The sterilization lamp is arranged at an upper position of the sterilization inner container 30, and the heating lamp is arranged at a lower position of the sterilization inner container 30. The sterilization lamp generates ultraviolet light to sterilize and disinfect. The heating lamp is used for drying residual water on tableware. The sterilization lamp can be double-layer glass, and a cavity is arranged between the two layers of glass. The sterilization lamp is provided with an air inlet pipe and an air outlet pipe arranged along the axial direction of the sterilization lamp, and both of them are in communication with the cavity. The air inlet pipe can be in communication with the steaming and baking inner container 20 and the sterilization inner container 30 through the first pipeline and the second pipeline respectively, and the air outlet pipe can be in communication with the steaming and baking inner container 20 and the sterilization inner container 30 through the third pipeline and the fourth pipeline respectively. In this way, the steaming and baking inner container 20, the first pipeline, the cavity and the third pipeline form a first circulation loop, and the sterilization inner container 30, the second pipeline, the cavity and the fourth pipeline form a second circulation loop. Oxygen in the air in the cavity can be excited to ozone under the action of ultraviolet light, and then be shunted to the steaming and baking inner container 20 and the sterilization inner container 30 through the third pipeline and the fourth pipeline, which can be used for sterilization and disinfection. The first pipeline and the second pipeline are connected in parallel to the air inlet pipe through the first three-way pipe, and the third pipeline and the fourth pipeline are connected in parallel to the air outlet pipe through the second three-way pipe.

[0046] For example, the inner layer glass of the sterilization lamp is used to transmit ultraviolet light with a wavelength of 253.7 nm and ultraviolet light with a wavelength of 185 nm. The ultraviolet light with a wavelength of 253.7 nm passes through the outer layer glass of the sterilization lamp to irradiate the sterilization inner container 30. The ultraviolet light with a wavelength of 185 nm can excite oxygen in the air in the cavity to ozone.

[0047] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0048] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, which are all within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A fan structure, characterized by comprising: The fan structure (10) comprises a rotating shaft (11) and a fan blade group (12) connected to the rotating shaft (11); The fan blade group (12) comprises a base (121) connected to the rotating shaft (11) and a blade (122) connected to the base (121), and the blade (122) is provided with a plurality of blades arranged along the circumference of the rotating shaft (11); At least part of the blade (122) comprises a first spoiler part (1221) and a second spoiler part (1222) connected and arranged at an angle, and the first spoiler part (1221) has a gradually expanding trend from inside to outside along the cross section of the rotating shaft (11) in the axial direction.

2. The fan structure according to claim 1, characterized by The first spoiler part (1221) comprises a connecting side (1201) and a spoiler side (1202) arranged along the circumference of the rotating shaft (11) at intervals, and the second spoiler part (1222) is connected to the connecting side (1201); Wherein, the distance between the spoiler side (1202) and the connecting side (1201) along the circumference of the rotating shaft (11) gradually increases from inside to outside.

3. The fan structure according to claim 2, characterized in that, The spoiler side (1202) comprises a tapered section (1202a), a straight section (1202b) and an expanding section (1202c), which are connected in sequence from the base (121) to the outer peripheral edge of the blade (122), and the straight section (1202b) is substantially parallel to the connecting side (1201).

4. The fan structure according to claim 2, characterized by The length direction of the connecting side (1201) is arranged at an angle with the radial direction of the rotating shaft (11).

5. The fan structure according to claim 2, wherein The first spoiler part (1221) is convexly provided with the second spoiler part (1222) on both sides in the axial direction of the rotating shaft (11).

6. The fan structure according to claim 5, wherein The fan structure (10) has an air inlet side and an air outlet side arranged at intervals in the axial direction of the rotating shaft (11); The protruding length of the second spoiler part (1222) on the air outlet side is greater than the protruding length of the second spoiler part (1222) on the air inlet side.

7. The fan structure according to claim 1, wherein The first spoiler part (1221) and / or the second spoiler part (1222) is provided with an arc-shaped notch (1223) near the top corner of the edge of the blade (122); and / or, the first spoiler part (1221) and the second spoiler part (1222) are both flat.

8. The fan structure according to claim 1, wherein The fan blade group (12) is provided with two groups and arranged at intervals in the axial direction of the rotating shaft (11), and the corresponding second spoiler part (1222) in each group of the fan blade group (12) is arranged on the side opposite to the corresponding first spoiler part (1221).

9. A steaming, baking, and sterilizing all-in-one machine, characterized in that, The fan structure (10) comprises a steaming and roasting inner container (20), a sterilization inner container (30) and the fan structure of any one of claims 1 to 8, the steaming and roasting inner container (20) and the sterilization inner container (30) are arranged at intervals in a first direction and provided with an assembly gap, at least the steaming and roasting inner container (20) is provided with a ventilation opening communicating with the assembly gap, and the fan structure (10) is arranged in the assembly gap and located at the ventilation opening.

10. The steaming, roasting, and baking all-in-one machine of claim 9, wherein, The steaming and roasting inner container (20) and the sterilizing inner container (30) are both provided with the ventilation openings, one group of the fan blade groups (12) in the fan structure (10) is arranged at one of the ventilation openings, and another group of the fan blade groups (12) is arranged at another ventilation opening.

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