A fan blade and a fan device

Abstract

The application discloses a fan blade and a fan device, wherein the fan blade comprises a rotating head and a blade connected to the rotating head, the blade comprises an inner contour and an outer contour, the inner contour and the outer contour are smoothly connected, and the vertical projection shapes of the inner contour and the outer contour are both Archimedes spirals. The fan blade is easy to fold by integrating the rotating head and the blade, the vertical projection shapes of the inner contour and the outer contour of the fan blade are both Archimedes spirals, the length of the foldable fan blade is increased, the inner contour and the outer contour are smoothly connected, the fan blowing is smooth, and the noise generated by the fan is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a fan blade and a fan device. BACKGROUND

[0002] The fan blades commonly seen in the market have inner and outer contours that are concentric circles, and there is no smooth transition at the connection between the inner and outer contours, which results in uneven blowing and loud noise of the fan. In addition, the position of the rotating head connected to the fan blade is discontinuous with the blade, and it is not easy to fold the fan blade in some fans that need to fold the fan blade. Moreover, the length of the foldable fan blade is limited by the concentric circles, which results in a shorter fan blade. SUMMARY

[0003] The present application aims to provide a fan blade and a fan device to solve the problems of concentric inner and outer contours, no smooth transition at the connection between the inner and outer contours, and discontinuity between the rotating head and the blade of the fan blade.

[0004] To solve the above technical problems, the present application is achieved by the following technical scheme: a fan blade is provided, which includes a rotating head and a blade connected to the rotating head. The blade includes an inner contour and an outer contour, and the inner and outer contours are smoothly connected. The vertical projection shape of the inner and outer contours is an Archimedean spiral.

[0005] Further, the vertical projection cross-sectional width of the fan blade increases linearly from the rotating head to the tail end of the blade.

[0006] Further, the outer contour of the fan blade is represented as: The inner contour of the fan blade is represented as: Wherein, A is a constant, D is the diameter of the smallest circle of the outer contour of the fan blade, r 外 is the distance from a point on the outer spiral to the pole point O, r 内 is the distance from a point on the inner spiral to the pole point O, θ 内 is the angle between the line connecting the point on the inner contour and the pole point O and the horizontal pole axis, θ 外 is the angle between the line connecting the point on the outer contour and the pole point O and the horizontal pole axis, π < θ 内 <2π, 3π < θ 外 <4π.

[0007] Further, the vertical projection cross-sectional width d of the fan blade is:

[0008] Further, the fan blade as a whole is arc-shaped, and the fan blade gradually rises from the rotating head to the tail end.

[0009] Further, the inner profile upturn angle of the fan blade is greater than the outer profile upturn angle.

[0010] Further, each angle section of the fan blade is in the shape of a wing section.

[0011] Further, the thickness of the fan blade gradually decreases from the head end to the tail end, and the turning angle of each angle longitudinal section is in the range of 15°-45°.

[0012] Further, each angle longitudinal section of the fan blade comprises a head section, a middle section and a tail section in sequence from the head end to the tail end, the turning angle of the middle section varies in the range of 1°-3°, and the turning angle of the head section and the tail section varies in the range of 6°-17°.

[0013] The embodiment of the present application also provides a fan device, which is a fan or a fan lamp, and the fan device comprises: a fixing device; a fan head rotatably connected to the fixing device; and at least two fan blades as described above, the head ends of the at least two fan blades are uniformly connected to the fan head.

[0014] The embodiment of the present application provides a fan blade and a fan device, the fan blade comprises a head end and a blade connected to the head end, the blade comprises an inner profile and an outer profile, the inner profile and the outer profile are smoothly connected, and the vertical projection shapes of the inner profile and the outer profile are both Archimedes spirals. The fan blade is easy to fold by integrating the head end and the blade, the vertical projection shapes of the inner profile and the outer profile of the fan blade are both Archimedes spirals, the length of the foldable fan blade is increased, the inner profile and the outer profile are smoothly connected, the fan blows smoothly, and the noise generated by the fan is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The structural schematic diagram of the fan blade from the first perspective of the embodiment of the present application is provided.

[0017] Figure 2 The structural schematic diagram of the fan blade from the second perspective of the embodiment of the present application is provided.

[0018] Figure 3 The structural schematic diagram of the fan blade from the third perspective of the embodiment of the present application is provided.

[0019] Figure 4A structural schematic view of a fourth perspective of the fan blade provided for the embodiment of the present application;

[0020] Figure 5 A structural schematic view of a fifth perspective of the fan blade provided for the embodiment of the present application;

[0021] Figure 6 A schematic view of the Archimedes spiral line where the profile line of the fan blade is located provided for the embodiment of the present application;

[0022] Figure 7 A structural schematic view of the cone where the inner and outer profiles of the side view projection of the fan blade are located provided for the embodiment of the present application;

[0023] Figure 8 A structural schematic view of the cone where the outer profile of the side view projection of the fan blade is located provided for the embodiment of the present application;

[0024] Figure 9 A structural schematic view of the cone where the inner profile of the side view projection of the fan blade is located provided for the embodiment of the present application;

[0025] Figure 10 A schematic view of each angle section of the fan blade provided for the embodiment of the present application;

[0026] Figure 11 A schematic view of the section A-A provided for the embodiment of the present application;

[0027] Figure 12 A schematic view of the section B-B provided for the embodiment of the present application;

[0028] Figure 13 A schematic view of the section C-C provided for the embodiment of the present application;

[0029] Figure 14 A schematic view of the section D-D provided for the embodiment of the present application;

[0030] Figure 15 A schematic view of the section E-E provided for the embodiment of the present application;

[0031] Figure 16 A schematic view of the air flow of the existing blade section;

[0032] Figure 17 A schematic view of the air flow of the blade section provided for the embodiment of the present application;

[0033] Figure 18 A structural schematic view of the fan device provided for the embodiment of the present application;

[0034] Figure 19 A structural schematic view of the fan or fan lamp fan blade folding state provided for the existing fan or fan lamp fan blade folding state;

[0035] Figure 20Structure diagram of fan or fan lamp blade unfolding state provided by the embodiment of the present application;

[0036] Figure 21 Structure diagram of fan or fan lamp blade folding state provided by the embodiment of the present application;

[0037] Figure 22 Structure diagram of fan or fan lamp blade unfolding state provided by the embodiment of the present application.

[0038] Identification in the figure:

[0039] 1, rotating head;

[0040] 2, blade; 21, inner contour; 22, outer contour; 23, tail end;

[0041] 3, fixing device;

[0042] 4, fan head;

[0043] 5, fan blade. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0046] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless otherwise clearly indicated by the context, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0047] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0048] Combination Figure 1As shown in the drawings, the fan blade of the embodiment of the present application comprises a hub 1 and a blade 2 connected to the hub 1, the blade 2 comprises an inner profile 21 and an outer profile 22, the inner profile 21 and the outer profile 22 are smoothly connected, and the vertical projection of the inner profile 21 and the outer profile 22 is an Archimedes spiral.

[0049] In the embodiment, for the fan with retractable fan blades, the fan blades are easily retracted by the integration of the hub 1 and the blade 2, the vertical projection of the inner profile 21 and the outer profile 22 of the fan blade is an Archimedes spiral, the length of the fan blade of the retractable fan is increased, the inner profile 21 and the outer profile 22 are smoothly connected, the air blowing of the fan is smooth, the noise generated by the fan is reduced, and the fan blade with the Archimedes spiral shape has the advantages of strong wind force, smooth and soft wind feeling, reduced noise and low energy consumption.

[0050] In combination with Figures 1-5 As shown in the drawings, the vertical projection cross-sectional width of the fan blade linearly increases from the hub 1 to the tail end 23 of the blade 2. In the embodiment, compared with the conventional suspension fan blade with consistent cross-sectional width, the linearly increased vertical projection cross-sectional width of the fan blade can make the fan blade have strong wind force and smooth air blowing.

[0051] Further, the fan blade as a whole is arc-shaped, and the fan blade gradually rises from the hub 1 to the tail end 23. In the embodiment, the gradually rising fan blade is conducive to the retraction of the fan blade, so that the tail end 23 of the fan blade with the Archimedes spiral shape can be retracted above the hub 1 of the adjacent fan blade, the unfolded length of the fan blade is increased, and the wind force is further enhanced.

[0052] Further, the rising angle of the inner profile 21 of the fan blade is greater than the rising angle of the outer profile 22 of the fan blade. In the embodiment, when the fan blade is retracted, the rising angle of the inner profile 21 of the fan blade is greater than the rising angle of the outer profile 22 of the fan blade, so that the inner profile 21 of the fan blade will not collide with the outer profile 22 of the adjacent fan blade, and the retraction of the fan blade is facilitated.

[0053] In combination with Figure 6 As shown in the drawings, the radius of the outer profile 22 of the fan blade is represented as: The radius of the inner profile 21 of the fan blade is represented as: Wherein, A is a constant, D is the diameter of the smallest circle of the outer profile 22 of the fan blade, r 外 is the distance from the point on the outer profile spiral to the pole point O, r 内 is the distance from the point on the inner profile spiral to the pole point O, θ 内 is the angle between the line connecting the point on the inner profile 21 of the fan blade and the pole point O and the horizontal pole axis, θ 外 is the angle between the line connecting the point on the outer profile 22 of the fan blade and the pole point O and the horizontal pole axis, π<θ 内 <2π, 3π<θ外 <4π. In this embodiment, the outer profile 22 of the fan blade lies on the Archimedes spiral line W, and the inner profile 21 of the fan blade lies on the Archimedes spiral line N. According to the Archimedes spiral line polar equation, the outer profile 22 of the fan blade is expressed as: The effective interval of the polar fan blade is set as π < θ 内 <2π, 3π < θ 外 <4π. The inner profile 21 of the fan blade is expressed as:

[0054] In a specific embodiment, the value of D can be set in advance according to the size of the fan folding, and the value of A can be obtained according to the expected fan blade width, 30mm < A < 100mm, 350mm < D < 520mm. The value of A affects the cross-sectional width of the fan blade, and the value of D affects the maximum size of the fan blade after folding. According to the values of A and D, the inner profile 21 and the outer profile 22 of the fan blade can be further determined. In a more specific embodiment, A is 50mm, and D is 400mm, which is suitable for fan blades in many cases.

[0055] Further, the vertical projection cross-sectional width d of the fan blade is: In this embodiment, because θ 外 = θ 内 + 2π, the vertical projection cross-sectional width d of the fan blade is:

[0056] As shown in Figures 7-9 , after the fan blade is folded, the outer profile 22 of the fan blade side view projection lies on a conical angle α, and the inner profile 21 of the fan blade side view projection lies on a conical angle β. α determines the upward angle trend of the outer profile 22 of the fan blade, and β determines the upward angle trend of the inner profile 21 of the fan blade. By adjusting α and β, the longitudinal shape of the blade 2 with different upward angle trends can be obtained, thereby determining the overall fan blade modeling.

[0057] As shown in Figures 10-15 , each angle cross-section of the fan blade is a wing section modeling. In this embodiment, the wing section modeling conforms to aerodynamics, so that the flow resistance of the fan blade is smaller, the rotation of the fan blade is smoother, and the noise is reduced.

[0058] The fan blade is arranged at angles from the head 1 to the tail end 23, and the cross-sections are A-A, B-B, C-C, D-D and E-E.

[0059] Specifically, the thickness of the fan blade gradually decreases from the head 1 to the tail end 23, and the turning angle of each angle longitudinal cross-section is in the range of 15°-45°.

[0060] In this embodiment, the thickness of the fan blade gradually decreases, which saves material under the premise of ensuring the strength of the blade, and this design conforms to aerodynamics, so that the fan blade receives smaller flow resistance. In a more specific embodiment, the thickness of the head 1 of the fan blade ranges from 3 to 5 mm, and the thickness of the tail end 23 ranges from 0.5 to 2 mm. The fan blade is respectively made of Figures 8-12 The left side of the section is the inlet end, and the right side is the outlet end. The tangent lines of the inlet end and the outlet end are drawn, respectively. Then, the perpendicular lines of the two tangent lines are drawn from the inlet end and the outlet end as the starting points. The intersection of the two perpendicular lines is the turning angle. The angles of the turning angles ∠A, ∠B, ∠C, ∠D, and ∠E gradually change gently, thereby reducing turbulence and smoothly transitioning airflow. Compared with the fan blades of existing fans, the noise generated is greatly reduced.

[0061] Further, the longitudinal section of each angle of the fan blade includes a first segment, a middle segment, and a tail segment from the head 1 to the tail end 23. The turning angle of the middle segment changes by 1°-3°, and the turning angles of the first segment and the tail segment change by 6°-17°. In this embodiment, the turning angles of the first segment and the tail segment change greatly, which conforms to aerodynamics and enhances the wind power of the fan blade.

[0062] As shown in Figure 16 and Figure 17 , the thickness of the conventional blade is uniform. When air enters from the left and passes around the fan blade, a vortex is generated at the tail end of the fan blade, which not only produces noise but also causes unnecessary energy loss. The fan blade of the present application adopts a wing section design, and the thickness of the fan blade gradually decreases from the head to the tail, which smoothly transitions airflow and is similar to an airplane wing, thereby conforming to aerodynamics and greatly reducing noise generation.

[0063] As shown in Figure 18 , the present application further provides a fan device, which is a fan or a fan lamp. The fan device includes a fixing device 3, a fan head 4 rotatably connected to the fixing device 3, and at least two fan blades 5 as described above, the heads 1 of the at least two fan blades 5 being uniformly connected to the fan head 4. When it is a fan lamp, the fan head 4 further includes a lighting assembly, which can be arranged according to existing technology and will not be described in detail here.

[0064] In this embodiment, the existing fan or fan lamp fan blade has a sudden angle change, which generates turbulence. The fan blade 5 of the present application smoothly transitions the upward angle from the head 1 to the tail end 23, conforms to aerodynamics, and has uniform airflow, thereby blowing more gently. The cross section of the fan blade 5 is in the shape of a wing surface, which is smoothly integrated and transitions, solves the problems of high energy consumption and loud noise of the fan or fan lamp, and further enhances the wind power of the fan. In a specific embodiment, the fan uses three fan blades 5 uniformly connected to the fan head 4, and the design of the three fan blades 5 is more beautiful and practical.

[0065] In a further embodiment, the head 1 of the fan blade 5 is rotatably connected to the fan head 4.

[0066] In this embodiment, combined with Figures 19-22 As shown in the figure, taking D as 400mm, the diameter of the existing fan after the fan blade is unfolded is 825mm, and the diameter of the fan blade 5 of the fan of the present application after being unfolded is 910mm. Compared with the existing fan, the size of the fan blade 5 after being unfolded is larger, and the blowing area is increased under the condition that the folding size is the same.

[0067] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fan blade, characterized by The fan blade comprises a head and a blade connected to the head, the blade comprises an inner profile and an outer profile, the inner profile and the outer profile are smoothly connected, and the vertical projection of the inner profile and the outer profile is an Archimedes spiral; The outer profile of the vane is represented as: The inner profile of the vane is represented as: where A is a constant, D is the diameter of the smallest circle containing the outer profile of the vane, r 外 is the distance of a point on the outer profile helix to the pole O, r 内 is the distance of a point on the inner profile helix to the pole O, θ 内 is the angle between the line connecting a point of the inner profile of the vane to the pole O and the polar axis, θ 外 is the angle between the line connecting a point of the outer profile of the vane to the pole O and the polar axis, π < θ 内 < 2π, 3π < θ 外 < 4π; The vertical projection cross-sectional width d of the fan blade is: and linearly increases from the rotor head to the tail end of the blade.

2. The leaf according to claim 1, characterized in that The fan blade is arc-shaped as a whole, and the fan blade gradually rises from the head to the tail end.

3. The leaf according to claim 2, wherein The rising angle of the inner profile of the fan blade is greater than the rising angle of the outer profile of the fan blade.

4. The leaf according to claim 2, wherein Each angle longitudinal section of the fan blade is a wing section.

5. The leaf according to claim 4, wherein The thickness of the fan blade gradually decreases from the head to the tail end, and the turning angle of each angle longitudinal section is in the range of 15°-45°.

6. The leaf according to claim 5, wherein Each angle longitudinal section of the fan blade comprises a first section, a middle section and a tail section from the head to the tail end, the turning angle of the middle section changes in the range of 1°-3°, and the turning angle of the first section and the tail section changes in the range of 6°-17°.

7. A fan arrangement, characterized by The fan comprises: a fixing device; a fan head rotatably connected to the fixing device; at least two fan blades according to any one of claims 1-6, the heads of the at least two fan blades are uniformly connected to the fan head; the head of the fan blade is rotatably connected to the fan head.

Images