Centrifugal fan blade and air fryer

Abstract

The utility model provides a centrifugal fan blade and an air fryer, and relates to the technical field of cooking equipment. The centrifugal fan blade comprises a mounting part and a fan blade, wherein the mounting part comprises a mounting hole; the blades are connected with the mounting part, the blades are arranged on the peripheral side of the mounting part, the number of the blades is multiple, and the multiple blades are distributed in the peripheral direction of the mounting part at intervals; wherein each blade comprises a plurality of windward sides, the windward sides are connected end to end in the direction away from the mounting part, and the inclination angles of every two adjacent windward sides relative to the radial direction of the mounting hole are different. According to the centrifugal fan blade, the multiple windward faces with the different windward angles are arranged on the single blade, and the multiple windward faces are sequentially arranged in the direction away from the mounting part, so that the technical problems of large rotation resistance and low aerodynamic efficiency existing in the prior art can be solved, and the technical effects of optimizing the shape of the centrifugal fan blade and improving the gas driving efficiency of the centrifugal fan blade are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, and in particular to a centrifugal fan blade and an air fryer. Background Art

[0002] Centrifugal fan blades are commonly found in cooking equipment. The rotating centrifugal fan blades can generate a directional airflow, thereby meeting the cooking needs of food through the airflow.

[0003] In the related art, for centrifugal fan blades formed by a stamping process, the windward surface of each blade is a single plane.

[0004] However, the blades consisting of only a single plane are subject to greater wind resistance during rotation, resulting in technical problems of large rotational resistance and low aerodynamic efficiency in centrifugal fan blades. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, a first aspect of the present invention provides a centrifugal fan blade.

[0007] A second aspect of the present invention provides an air fryer.

[0008] In view of this, the first aspect of the present invention provides a centrifugal fan blade, which includes: a mounting portion, the mounting portion includes a mounting hole; blades, the blades are connected to the mounting portion, the blades are arranged on the circumferential side of the mounting portion, the number of blades is multiple, and the multiple blades are spaced apart in the circumferential direction of the mounting portion; wherein, each blade includes multiple windward surfaces, the multiple windward surfaces are connected end to end in the direction away from the mounting portion, and the inclination angles of two adjacent windward surfaces relative to the radial direction of the mounting hole are different.

[0009] In this technical solution, the centrifugal fan blades include a mounting portion and blades. The mounting portion is used to connect to the rotating shaft of the drive motor, and the blades are connected to the mounting portion. The mounting portion can provide support for multiple blades. The mounting portion is provided with multiple blades, and the multiple blades are spaced apart in the circumferential direction of the mounting portion to form an array surrounding the mounting portion. Specifically, a mounting hole is provided in the central area of ​​the mounting portion, and the rotating shaft of the drive motor can be connected to the mounting hole, so that the drive motor can drive the centrifugal fan blades to rotate. The rotating centrifugal fan blades can generate an outlet airflow that spreads in all directions. In the process of blade rotation, the air flow is driven through the windward surface, and the resistance generated by the air on the windward surface corresponds to the rotational resistance of the centrifugal fan blades.

[0010] On this basis, the present application proposes a blade with multiple windward surfaces, each of which is connected end-to-end in a direction away from the mounting portion to form a series of windward arrays on the blade. Furthermore, in this windward array, adjacent windward surfaces have different inclination angles relative to the radial direction of the mounting hole.

[0011] Specifically, if the windward surface is flat, the angle between the windward surface and the radial direction of the mounting hole is the inclination angle of the windward surface relative to the radial direction of the mounting hole. If the windward surface is curved, the angle between the line connecting the starting and ending points of the windward surface and the radial direction of the mounting hole is the inclination angle of the windward surface relative to the radial direction of the mounting hole.

[0012] Compared to the solution of driving the airflow movement through a single plane, by providing multiple windward surfaces with different windward angles on a single blade, and arranging the multiple windward surfaces in sequence in the direction away from the mounting portion, on the one hand, the shape of the windward streamline on each fan blade can be refined so that the windward streamline can approach the flow direction of the gas, thereby reducing the aerodynamic resistance encountered by the blade during rotation. On the other hand, the shape formed by the combination of multiple windward surfaces can be made closer to the movement mode of the air, which is a fitting fluid, thereby improving the aerodynamic efficiency of the blade. This solves the technical problems of large rotational resistance and low aerodynamic efficiency existing in the related technology, and achieves the technical effect of optimizing the shape of the centrifugal fan blade and improving the gas drive efficiency of the centrifugal fan blade.

[0013] In addition, the centrifugal fan blades provided by the present invention may also have the following additional technical features:

[0014] In some technical solutions of the present invention, optionally, the windward surface is a plane.

[0015] In this technical solution, the windward surface is a plane, and the angle between the windward surface and the radial direction of the mounting hole is the inclination angle of the windward surface relative to the radial direction of the mounting hole.

[0016] By designing the windward surface to be flat, the centrifugal fan blade can be suitable for stamping and bending processes.

[0017] Specifically, during the production of centrifugal fan blades, the shape of the centrifugal fan blades is first punched out through a stamping process after blanking the sheet metal, and then the windward surface of the blades is bent through a bending process.

[0018] This production process is suitable for large-scale production and is beneficial to reducing the process complexity and process cost of centrifugal fan blades.

[0019] In some technical solutions of the present invention, optionally, a reference plane is determined by the axial direction and the radial direction of the mounting hole, and the inclination angle of the windward surface relative to the same reference plane gradually increases in the direction away from the mounting portion.

[0020] In this technical solution, a reference plane is determined by the axial and radial directions of the mounting holes. For each of the multiple windward surfaces on a blade, these surfaces are compared with the reference plane passing through the root of the blade. Specifically, the inclination angles of the windward surfaces relative to the reference plane gradually increase from the root to the tip of the blade, meaning that the windward surfaces gradually flare outward as they move away from the mounting portion.

[0021] By setting multiple windward surfaces on the blades with gradually increasing inclination angles relative to the same reference plane, the shape of the windward streamline on the blades can be made close to the flow direction of the gas around the blades, thereby reducing the air resistance encountered by the blades during rotation, and then reducing the rotational resistance of the centrifugal fan blades, achieving the technical effect of optimizing the shape of the centrifugal fan blades, reducing the rotational energy consumption of the centrifugal fan blades, and improving the aerodynamic efficiency of the centrifugal fan blades.

[0022] In some technical solutions of the present invention, optionally, the length of the windward surface gradually decreases in a direction away from the mounting portion.

[0023] In this technical solution, the lengths of the plurality of windward surfaces gradually decrease from the root of the blade to the end of the blade, and the lengths of the windward surfaces correspond to the flow distance of the air adhering to the windward surfaces.

[0024] By setting multiple windward surfaces with gradually decreasing lengths on the blades, the shape of the windward streamlines on the blades can be made closer to the flow direction of the gas around the blades, thereby reducing the air resistance encountered by the blades during rotation, and then reducing the rotational resistance of the centrifugal fan blades, achieving the technical effect of optimizing the shape of the centrifugal fan blades, reducing the rotational energy consumption of the centrifugal fan blades, and improving the aerodynamic efficiency of the centrifugal fan blades.

[0025] In some technical solutions of the present invention, optionally, the blade includes multiple bending segments, which are connected end to end in the direction away from the mounting portion, and the inclination angles of two adjacent bending segments relative to the radial direction of the mounting hole are different, and each bending segment includes a windward surface.

[0026] In this technical solution, each blade includes multiple bending segments, which are connected end to end in the direction away from the mounting portion, wherein each bending segment has a windward surface, and the inclination angles of two adjacent bending segments relative to the radial direction of the mounting hole are different.

[0027] The multiple bending sections can provide positioning and support for the multiple windward surfaces respectively, ensuring that the mounting portion can drive the multiple windward surfaces connected end to end to rotate through the multiple bending sections, thereby jointly driving the gas flow through the multiple windward surfaces with different inclination angles.

[0028] Compared to the solution of driving the airflow movement through a single plane, by providing multiple windward surfaces with different windward angles on a single blade, and arranging the multiple windward surfaces in sequence in the direction away from the mounting portion, on the one hand, the shape of the windward streamline on each fan blade can be refined so that the windward streamline can approach the flow direction of the gas, thereby reducing the aerodynamic resistance encountered by the blade during rotation. On the other hand, the shape formed by the combination of multiple windward surfaces can be made closer to the movement mode of the air, which is a fitting fluid, thereby improving the aerodynamic efficiency of the blade. This solves the technical problems of large rotational resistance and low aerodynamic efficiency existing in the related technology, and achieves the technical effect of optimizing the shape of the centrifugal fan blade and improving the gas drive efficiency of the centrifugal fan blade.

[0029] In some technical solutions of the present invention, optionally, the windward surface is a curved surface, and the curvatures of two adjacent curved surfaces are different.

[0030] In this technical solution, the multiple windward surfaces on the blades are all curved surfaces. By setting the windward surfaces as curved surfaces, the shape of the windward surfaces can be made closer to the flow trajectory of the airflow blown out by the centrifugal fan blades, thereby reducing the aerodynamic resistance of the centrifugal fan blades and further improving the gas driving efficiency of the centrifugal fan blades.

[0031] On this basis, the curvatures of two adjacent curved surfaces on the blade can be different, specifically, the curvature of the curved surface can be selected to gradually decrease in the direction away from the mounting portion. By providing multiple curved surfaces with different curvatures on the blade, the shape of the windward surface can also be made to more closely resemble the flow trajectory of the airflow blown by the centrifugal fan blade, thereby reducing the aerodynamic drag on the centrifugal fan blade and further improving the gas drive efficiency of the centrifugal fan blade.

[0032] In some technical solutions of the present invention, optionally, the windward surface includes a curved surface and a flat surface, and the curved surface and the flat surface are alternately arranged in a direction away from the mounting portion.

[0033] In this technical solution, the multiple windward surfaces include curved surfaces and flat surfaces, and in the direction of the principle mounting portion, the curved surfaces and flat surfaces are alternately distributed. For example, when the blade includes only two windward surfaces, the blade includes one curved surface and one flat surface; when the blade includes three windward surfaces, the blade includes two curved surfaces and one flat surface, or includes two flat surfaces and one curved surface; when the blade includes four windward surfaces, the blade includes two curved surfaces and two flat surfaces.

[0034] By alternating the distribution of flat surfaces and curved surfaces on the blades, on the one hand, the curved surface can make the shape of the windward surface closer to the flow trajectory of the airflow blown out by the centrifugal fan blades, thereby reducing the rotational resistance of the centrifugal blades. On the other hand, the flat surface can ensure the structural strength of the blades and reduce the failure rate of the blades.

[0035] In some technical solutions of the present invention, optionally, the windward surface includes multiple planes, and two adjacent planes are transitioned through arc surfaces.

[0036] In this technical solution, the multiple windward surfaces on the blades are all planes, and the two adjacent planes are connected by a circular arc transition surface. By setting an arc-shaped transition surface between the two adjacent planes, the structural strength between the two adjacent planes can be improved, and the possibility of the blade bending or even breaking between the two adjacent planes can be reduced, thereby achieving the technical effect of reducing the failure rate of centrifugal fan blades.

[0037] In some technical solutions of the present invention, optionally, the bending section includes: a first section, connected to the mounting section, and the first section and the mounting section are located in the same plane; a second section, connected to the first section, the windward surface is located in the second section, and the second section is inclined to the first section.

[0038] In this technical solution, each bending section includes a first section and a second section, and the multiple first sections on the blade are connected end to end to support the multiple second sections.

[0039] The second section connects to the first section and is tilted relative to the first section, adjusting the orientation of the windward surface through this tilt. During production, after the prototype of the centrifugal blade is punched out through a stamping process, the first and second sections are aligned in the same plane. The second section is then bent through a bending process to adjust the orientation of the windward surface.

[0040] It can be seen that the centrifugal fan blades under this structure can be formed through stamping and bending processes, are suitable for large-scale production, and are conducive to reducing the process complexity and process cost of the centrifugal fan blades.

[0041] The second aspect of the present invention provides an air fryer, which includes: a main body, which includes a cooking cavity; a centrifugal fan blade such as any of the above technical solutions, which is arranged opposite to the cooking cavity and is used to blow air into the cooking cavity through rotation.

[0042] In this technical solution, an air fryer is proposed which is provided with the centrifugal fan blades in any of the above technical solutions. Therefore, the air fryer has the advantages of the centrifugal fan blades in any of the above technical solutions, and can achieve the technical effects that can be achieved by the centrifugal fan blades in any of the above technical solutions. To avoid repetition, it will not be repeated here.

[0043] On this basis, the air fryer also includes a body, which is the main structure of the cooking device. The body forms the outer surface of the cooking device, and a cooking cavity is enclosed in the body, and food is cooked in the cooking cavity.

[0044] Among them, the centrifugal fan blades are arranged opposite to the cooking cavity, and the rotating centrifugal fan blades cooperate with the heating components to generate a directional high-temperature airflow. The directional high-temperature airflow includes an outlet airflow and a return airflow. When the centrifugal fan blades rotate, the outlet airflow first diffuses to the surroundings, and after contacting the side wall of the cooking cavity, it flows from top to bottom along the side wall of the cooking cavity. Then the airflow converges to the central area of ​​the cooking cavity, and forms a return airflow flowing toward the fan blades after heating the food.

[0045] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0047] Figure 1 A schematic structural diagram of a centrifugal fan blade according to an embodiment of the present invention is shown;

[0048] Figure 2 A schematic structural diagram of a centrifugal fan blade according to an embodiment of the present invention is shown;

[0049] Figure 3 A schematic structural diagram of a centrifugal fan blade according to an embodiment of the present invention is shown;

[0050] Figure 4 The figure shows a structural diagram of an air fryer according to an embodiment of the present invention.

[0051] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0052] 100 centrifugal fan blades, 110 mounting portion, 1102 mounting hole, 120 blades, 122 windward surface, 124 bending section, 1242 first section, 1244 second section, 200 air fryer, 210 main body, 2102 cooking cavity, 212 pot body, 214 lid body. DETAILED DESCRIPTION

[0053] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0055] Refer to the following Figures 1 to 4 The invention describes a centrifugal fan blade and an air fryer according to some embodiments of the invention.

[0056] like Figure 1 、 Figure 2 and Figure 3 As shown, an embodiment of the present invention proposes a centrifugal fan blade 100, which includes: a mounting portion 110, the mounting portion 110 including a mounting hole 1102; a blade 120, the blade 120 is connected to the mounting portion 110, the blade 120 is arranged on the circumferential side of the mounting portion 110, the number of blades 120 is multiple, and the multiple blades 120 are spaced apart in the circumferential direction of the mounting portion 110; wherein each blade 120 includes multiple windward surfaces 122, the multiple windward surfaces 122 are connected end to end in the direction away from the mounting portion 110, and the inclination angles of two adjacent windward surfaces 122 relative to the radial direction of the mounting hole 1102 are different.

[0057] Figure 2 , arrow a shows the circumferential direction of the mounting hole 1102 .

[0058] In this embodiment, the centrifugal fan blade 100 includes a mounting portion 110 and a blade 120, the mounting portion 110 is used to connect the rotating shaft of the drive motor, the blade 120 is connected to the mounting portion 110, the mounting portion 110 can provide support for multiple blades 120, and a plurality of blades 120 are provided on the mounting portion 110, and the plurality of blades 120 are spaced apart and distributed circumferentially around the mounting portion 110 to form an array surrounding the mounting portion 110. Specifically, a mounting hole 1102 is provided in the central area of ​​the mounting portion 110, and the rotating shaft of the drive motor can be connected to the mounting hole 1102, so that the drive motor can drive the centrifugal fan blade 100 to rotate, and the rotating centrifugal fan blade 100 can generate an airflow that spreads to the surroundings. In the process of the blade 120 rotating, the gas flow is driven through the windward surface 122, and the resistance generated by the air on the windward surface 122 corresponds to the rotational resistance of the centrifugal fan blade 100.

[0059] On this basis, each blade 120 proposed in this application is provided with multiple windward surfaces 122, and the multiple windward surfaces 122 are connected end to end in a direction away from the mounting portion 110, so as to form a series of windward arrays on the blades 120. Furthermore, in this windward array, two adjacent windward surfaces 122 have different inclination angles relative to the radial direction of the mounting hole 1102.

[0060] Specifically, when the windward surface 122 is a plane, the angle between the windward surface 122 and the radial direction of the mounting hole 1102 is the inclination angle of the windward surface 122 relative to the radial direction of the mounting hole 1102. When the windward surface 122 is a curved surface, the angle between the line connecting the starting point and the end point of the windward surface 122 and the radial direction of the mounting hole 1102 is the inclination angle of the windward surface 122 relative to the radial direction of the mounting hole 1102.

[0061] Compared to the solution of driving the airflow movement through a single plane, by providing a plurality of windward surfaces 122 with different windward angles on a single blade 120, and arranging the plurality of windward surfaces 122 in sequence in a direction away from the mounting portion 110, on the one hand, the shape of the windward streamline on each blade can be refined so that the windward streamline can approach the flow direction of the gas, thereby reducing the aerodynamic resistance encountered by the blade 120 during the rotation process. On the other hand, the shape formed by the combination of the plurality of windward surfaces 122 can be made close to the movement mode of the air, which is a fitting fluid, thereby improving the aerodynamic efficiency of the blade 120. This solves the technical problems of large rotational resistance and low aerodynamic efficiency existing in the related art, and achieves the technical effect of optimizing the shape of the centrifugal fan blade 100 and improving the gas drive efficiency of the centrifugal fan blade 100.

[0062] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, optionally, the windward surface 122 is a plane.

[0063] In this embodiment, the windward surface 122 is a plane, and the angle between the windward surface 122 and the radial direction of the mounting hole 1102 is the inclination angle of the windward surface 122 relative to the radial direction of the mounting hole 1102 .

[0064] By designing the windward surface 122 as a plane, the centrifugal blade 100 can be suitable for stamping and bending processes.

[0065] Specifically, during the production of the centrifugal fan blade 100 , the shape of the centrifugal fan blade 100 is first punched out through a stamping process after blanking the sheet metal, and then the windward surface 122 on the blade 120 is bent through a bending process.

[0066] This production process is suitable for large-scale production and is beneficial to reducing the process complexity and process cost of the centrifugal fan blade 100.

[0067] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, optionally, through the axial direction of the mounting hole 1102 ( Figure 1 Indicated by arrow b) and the radial direction of the mounting hole 1102 ( Figure 1The reference plane is determined as shown by the arrow c in the middle, and the inclination angle of the windward surface 122 relative to the same reference plane gradually increases in the direction away from the mounting portion 110.

[0068] Figure 2 In the figure, d1 is the reference plane, α1 is the inclination angle of the windward surface 122 near the root of the blade 120 relative to the reference plane, and α2 is the inclination angle of the windward surface 122 near the end of the blade 120 relative to the reference plane. It can be seen that α2 is greater than α1.

[0069] In this embodiment, a reference plane is determined by the axial direction and the radial direction of the mounting hole 1102. For each of the multiple windward surfaces on a particular blade 120, the multiple windward surfaces 122 are compared with the reference plane passing through the root of the blade 120. Specifically, the inclination angles of the multiple windward surfaces 122 relative to the reference plane gradually increase from the root to the tip of the blade 120, i.e., the multiple windward surfaces 122 gradually expand outward in a direction away from the mounting portion 110.

[0070] By providing a plurality of windward surfaces 122 on the blade 120 with gradually increasing inclination angles relative to the same reference plane, the shape of the windward streamline on the blade 120 can be made close to the flow direction of the gas around the blade 120, thereby reducing the air resistance encountered by the blade 120 during rotation, and further reducing the rotational resistance of the centrifugal fan blade 100, achieving the technical effect of optimizing the shape of the centrifugal fan blade 100, reducing the rotational energy consumption of the centrifugal fan blade 100, and improving the aerodynamic efficiency of the centrifugal fan blade 100.

[0071] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, optionally, the length of the windward surface 122 gradually decreases in a direction away from the mounting portion 110 .

[0072] Figure 2 In FIG. 1 , L1 is the length of the windward surface 122 close to the root of the blade 120 , and L2 is the length of the windward surface 122 close to the end of the blade 120 . It can be seen that L1 is greater than L2 .

[0073] In this embodiment, the lengths of the plurality of windward surfaces 122 gradually decrease from the root of the blade 120 to the end of the blade 120 , and the length of the windward surface 122 corresponds to the flow distance of air adhering to the windward surface 122 .

[0074] By providing a plurality of windward surfaces 122 with gradually decreasing lengths on the blade 120, the shape of the windward streamline on the blade 120 can be made close to the flow direction of the gas around the blade 120, thereby reducing the air resistance encountered by the blade 120 during rotation, and further reducing the rotational resistance of the centrifugal fan blade 100, achieving the technical effect of optimizing the shape of the centrifugal fan blade 100, reducing the rotational energy consumption of the centrifugal fan blade 100, and improving the aerodynamic efficiency of the centrifugal fan blade 100.

[0075] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, optionally, the blade 120 includes a plurality of bent segments 124, the plurality of bent segments 124 are connected end to end in a direction away from the mounting portion 110, and the inclination angles of two adjacent bent segments 124 relative to the radial direction of the mounting hole 1102 are different, and each bent segment 124 includes a windward surface 122.

[0076] In this embodiment, each blade 120 includes a plurality of bent sections 124, which are connected end to end in a direction away from the mounting portion 110, wherein each bent section 124 has a windward surface 122 formed thereon, and the inclination angles of two adjacent bent sections 124 relative to the radial direction of the mounting hole 1102 are different.

[0077] The multiple bending sections 124 can provide positioning and support for the multiple windward surfaces 122 respectively, ensuring that the mounting portion 110 can drive the multiple windward surfaces 122 connected end to end to rotate through the multiple bending sections 124, thereby driving the gas flow through the multiple windward surfaces 122 with different inclination angles.

[0078] Compared to the solution of driving the airflow movement through a single plane, by providing a plurality of windward surfaces 122 with different windward angles on a single blade 120, and arranging the plurality of windward surfaces 122 in sequence in a direction away from the mounting portion 110, on the one hand, the shape of the windward streamline on each blade can be refined so that the windward streamline can approach the flow direction of the gas, thereby reducing the aerodynamic resistance encountered by the blade 120 during the rotation process. On the other hand, the shape formed by the combination of the plurality of windward surfaces 122 can be made close to the movement mode of the air, which is a fitting fluid, thereby improving the aerodynamic efficiency of the blade 120. This solves the technical problems of large rotational resistance and low aerodynamic efficiency existing in the related art, and achieves the technical effect of optimizing the shape of the centrifugal fan blade 100 and improving the gas drive efficiency of the centrifugal fan blade 100.

[0079] In some embodiments of the present invention, optionally, the windward surface 122 is a curved surface, and the curvatures of two adjacent curved surfaces are different.

[0080] In this embodiment, the multiple windward surfaces 122 on the blade 120 are all curved surfaces. By setting the windward surface 122 as a curved surface, the shape of the windward surface 122 can be made closer to the flow trajectory of the airflow blown out by the centrifugal fan blade 100, thereby reducing the aerodynamic resistance encountered by the centrifugal fan blade 100 and further improving the gas driving efficiency of the centrifugal fan blade 100.

[0081] On this basis, the curvatures of two adjacent curved surfaces on blade 120 are different, and specifically, the curvature of the curved surface can be selected to gradually decrease in the direction away from mounting portion 110. By providing multiple curved surfaces with different curvatures on blade 120, the shape of windward surface 122 can also be made to more closely match the flow trajectory of the airflow blown by centrifugal fan blade 100, thereby reducing the aerodynamic resistance of centrifugal fan blade 100 and improving the gas drive efficiency of centrifugal fan blade 100.

[0082] In some embodiments of the present invention, optionally, the windward surface 122 includes a curved surface and a flat surface, and the curved surface and the flat surface are alternately arranged in a direction away from the mounting portion 110 .

[0083] In this embodiment, the plurality of windward surfaces 122 include curved surfaces and flat surfaces, and the curved surfaces and flat surfaces are alternately distributed in the direction of the principle mounting portion 110. For example, when the blade 120 includes only two windward surfaces 122, the blade 120 includes one curved surface and one flat surface; when the blade 120 includes three windward surfaces 122, the blade 120 includes two curved surfaces and one flat surface, or includes two flat surfaces and one curved surface; when the blade 120 includes four windward surfaces 122, the blade 120 includes two curved surfaces and two flat surfaces.

[0084] By alternately distributing planes and curved surfaces on the blade 120, on the one hand, the curved surface can be used to make the shape of the windward surface 122 closer to the flow trajectory of the airflow blown out by the centrifugal fan blade 100, thereby reducing the rotational resistance of the centrifugal blade 120; on the other hand, the flat surface can be used to ensure the structural strength of the blade 120 and reduce the failure rate of the blade 120.

[0085] In some embodiments of the present invention, optionally, the windward surface 122 includes multiple planes, and two adjacent planes are transitioned through arc surfaces.

[0086] In this embodiment, the multiple windward surfaces 122 on the blade 120 are all planes, and the two adjacent planes are connected by a circular arc transition surface. By setting an arc-shaped transition surface between the two adjacent planes, the structural strength between the two adjacent planes can be improved, and the possibility of the blade 120 bending or even breaking between the two adjacent planes can be reduced, thereby achieving the technical effect of reducing the failure rate of the centrifugal fan blade 100.

[0087] like Figure 1and Figure 2 As shown, in some embodiments of the present invention, optionally, the bending section 124 includes: a first section 1242, connected to the mounting portion 110, and the first section 1242 and the mounting portion 110 are located in the same plane; a second section 1244, connected to the first section 1242, the windward surface 122 is located in the second section 1244, and the second section 1244 is inclined to the first section 1242.

[0088] In this embodiment, each bending segment 124 includes a first segment 1242 and a second segment 1244 . The multiple first segments 1242 on the blade 120 are connected end to end to support the multiple second segments 1244 .

[0089] Second section 1244 is connected to first section 1242 and is tilted relative to first section 1242. This tilt adjusts the orientation of windward surface 122. During production, after the prototype of centrifugal blade 100 is punched out through a stamping process, first section 1242 and second section 1244 are coplanar. Second section 1244 is then bent through a bending process to adjust the orientation of windward surface 122.

[0090] It can be seen that the centrifugal fan blade 100 under this structure can be formed through a stamping process and a bending process, is suitable for large-scale production, and is conducive to reducing the process complexity and process cost of the centrifugal fan blade 100.

[0091] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, optionally, the second section 1244 is perpendicular to the first section 1242 .

[0092] In this embodiment, the first section 1242 and the mounting portion 110 are in the same plane, and the second section 1244 is perpendicular to the plane where the first section 1242 and the mounting portion 110 are located.

[0093] By setting a vertical second section 1244, the rotating centrifugal fan blades 100 can blow airflow to the surroundings. When the centrifugal fan blades 100 are used in cooking equipment, the airflow diffused to the surroundings can quickly cover the space in the cooking cavity 2102 to increase the heating rate of food, and the centrifugal fan blades 100 that blow air from the sides will not blow directly on the food, which is beneficial to improving the heating uniformity of the food.

[0094] In some embodiments of the present invention, optionally, the mounting portion 110 and the blade 120 are an integrated structure.

[0095] In this embodiment, the mounting portion 110 and the blade 120 are an integrated structure, which can be formed by the aforementioned stamping process and bending process.

[0096] The integrated mounting portion 110 and the blade 120 have no structural cross-section, which provides the advantage of high structural strength. This allows the blade 120 to maintain its predetermined shape for a long time, reducing the probability of irreversible deformation or even breakage of the blade 120 during operation, thereby achieving the technical effect of extending the service life of the centrifugal fan blade 100. Furthermore, the integrated molding process has the advantages of high production efficiency and low production costs, which is conducive to improving the market competitiveness of the centrifugal fan blade 100.

[0097] like Figure 4 As shown, an embodiment of the present invention provides an air fryer 200, which includes: a main body 210, which includes a cooking cavity 2102; a centrifugal fan blade 100 like any of the above embodiments, which is arranged opposite to the cooking cavity 2102, and is used to blow airflow toward the cooking cavity 2102 by rotating.

[0098] In this embodiment, an air fryer 200 is proposed that is provided with the centrifugal fan blades 100 in any of the above embodiments. Therefore, the air fryer 200 has the advantages of the centrifugal fan blades 100 in any of the above embodiments, and can achieve the technical effects that can be achieved by the centrifugal fan blades 100 in any of the above embodiments. To avoid repetition, they will not be described here.

[0099] On this basis, the air fryer 200 also includes a body 210, which is the main structure of the cooking device. The body 210 forms the outer surface of the cooking device, and a cooking cavity 2102 is enclosed within the body 210, and food is cooked in the cooking cavity 2102.

[0100] Among them, the centrifugal fan blades 100 are arranged opposite to the cooking cavity 2102, and the rotating centrifugal fan blades 100 cooperate with the heating components to generate a directional high-temperature airflow. The directional high-temperature airflow includes an outlet airflow and a return airflow. When the centrifugal fan blades 100 rotate, the outlet airflow first diffuses to the surroundings, and after contacting the side wall of the cooking cavity 2102, it flows from top to bottom along the side wall of the cooking cavity 2102. Thereafter, the airflow converges to the central area of ​​the cooking cavity 2102, and forms a return airflow flowing toward the fan blades after heating the food.

[0101] like Figure 4 As shown, in some embodiments of the present invention, optionally, the main body 210 includes: a pot body 212, the cooking cavity 2102 is located in the pot body 212; a cover body 214, the cover body 214 covers the pot body 212, and the centrifugal fan blades 100 are located on the side of the cover body 214 facing the pot body 212.

[0102] In this embodiment, the body 210 includes a pot 212 and a lid 214 .

[0103] A cooking cavity 2102 is formed inside the pot 212, and the pot 212 is used to hold food. When the pot 212 is installed to a predetermined position, the lid 214 can cover the opening at the top of the pot 212 to prevent heat from being lost from the opening at the top of the pot 212.

[0104] Specifically, the inner side of the cover 214 is provided with a coating that can reflect heat radiation, thereby improving the heating efficiency of the food in the pot body 212.

[0105] The centrifugal fan blades 100 and the cover body are arranged on the inner side of the cover body 214, and the motor driving the centrifugal fan blades 100 to rotate is arranged on the outer side of the cover body 214 to prevent the high temperature environment from affecting the normal operation of the motor.

[0106] It should be clarified that in the claims, specification and drawings of the present invention, the term "plurality" refers to two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the purpose of more conveniently describing the present invention and making the description process simpler, and is not intended to indicate or imply that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions cannot be understood as limitations on the present invention. The terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0107] In the claims, specification, and drawings of the present invention, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification, and drawings of the present invention, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0108] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A centrifugal fan blade, characterized in that: include: a mounting portion, the mounting portion comprising a mounting hole; a blade connected to the mounting portion, the blade being disposed on a circumferential side of the mounting portion, the blade being plural in number, and the plurality of blades being spaced apart in a circumferential direction of the mounting portion; Each of the blades includes a plurality of windward surfaces, the plurality of windward surfaces are connected end to end in a direction away from the mounting portion, and two adjacent windward surfaces have different inclination angles relative to the radial direction of the mounting hole.

2. The centrifugal fan blade according to claim 1, characterized in that: The windward surface is a plane.

3. The centrifugal fan blade according to claim 2, characterized in that: A reference plane is determined by the axial direction of the mounting hole and the radial direction of the mounting hole, and in a direction away from the mounting portion, the inclination angle of the windward surface relative to the same reference plane gradually increases.

4. The centrifugal fan blade according to claim 2, characterized in that: The length of the windward surface gradually decreases in a direction away from the mounting portion.

5. The centrifugal fan blade according to claim 1, characterized in that: The blade includes a plurality of bent segments, which are connected end to end in a direction away from the mounting portion, and two adjacent bent segments have different inclination angles relative to the radial direction of the mounting hole, and each of the bent segments includes a windward surface.

6. The centrifugal fan blade according to any one of claims 1 to 5, characterized in that: The windward surface is a curved surface, and the curvatures of two adjacent curved surfaces are different.

7. The centrifugal fan blade according to any one of claims 1 to 5, characterized in that: The windward surface includes a curved surface and a flat surface, and in a direction away from the mounting portion, the curved surface and the flat surface are alternately arranged.

8. The centrifugal fan blade according to any one of claims 1 to 5, characterized in that: The windward surface includes a plurality of planes, and two adjacent planes are transitioned through arc surfaces.

9. The centrifugal fan blade according to claim 5, characterized in that: The bending section comprises: a first section connected to the mounting portion, wherein the first section and the mounting portion are located in the same plane; The second section is connected to the first section, the windward surface is located in the second section, and the second section is inclined to the first section.

10. An air fryer, characterized in that: include: a body, wherein the body includes a cooking cavity; The centrifugal fan blade according to any one of claims 1 to 9, wherein the centrifugal fan blade is arranged opposite to the cooking cavity, and the centrifugal fan blade is used to blow airflow into the cooking cavity by rotating.

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