Fan blade and portable fan

Abstract

A fan blade (11). The fan blade (11) comprises a blade connecting member and blade members; the blade connecting member comprises a ring-shaped impeller (24) and connecting arms (25); the ring-shaped impeller (24) is in a circular ring shape; one end of each connecting arm (25) is connected to the inner ring wall of the ring-shaped impeller (24), and the other end of the connecting arm (25) is fixed to the outer wall of a blade cover member (26); the plurality of blade members are evenly fixed to a top surface (29) and a bottom surface (30) of the ring-shaped impeller (24) in the circumferential direction of the blade cover member (26); each blade member is in an arc shape, and comprises a first blade (27) and a second blade (28) which extend in the axial direction of a rotating shaft of the fan blade (11) and are arranged in the circumferential direction; at least part of the first blade (27) is located on the top surface (29) of the ring-shaped impeller (24), and at least part of the second blade (28) is located on the bottom surface (30) of the ring-shaped impeller (24).

Description

Fan blades and portable fans Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a fan blade and a portable fan. Background Art

[0002] As people increasingly pursue more convenient lifestyles, a variety of portable fans have emerged to meet the need for fans during outdoor activities and other daily life scenarios. These include portable fans that can be hung around the neck, head, wrist, and other areas of the body. These overcome the limitations of handheld fans, freeing users' hands to enjoy the breeze anytime, anywhere, whether exercising, enjoying the outdoors, or working in the office.

[0003] Summary of the Invention

[0004] The main purpose of this application is to provide a fan blade, which includes a blade connector and a blade member. The blade member is arc-shaped and includes a first blade and a second blade extending axially along the rotation axis of the fan blade and arranged circumferentially. At least part of the first blade is located on the top surface of the annular impeller, and at least part of the second blade is located on the bottom surface of the annular impeller. The fan blade can achieve the effect of doubling the wind volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] This application will illustrate the embodiments with reference to the accompanying drawings. The drawings in this application are only used to describe the embodiments for illustrative purposes. Without departing from the principles of this application, those skilled in the art can easily make other embodiments according to the steps described below by following the description.

[0006] Figure 1 is a perspective view of a fan blade of the present invention;

[0007] FIG2 is a perspective view of the fan blade of the present invention from another angle;

[0008] FIG3 is a perspective view of the fan blade of the present invention from another angle;

[0009] FIG4 is a perspective view of the portable fan of the present invention;

[0010] FIG5 is a perspective view of the portable fan of the present invention;

[0011] FIG6 is a partial schematic diagram of the portable fan shown in FIG5 with the top wall removed;

[0012] FIG7 is a perspective view of the blades of the portable fan of the present invention;

[0013] FIG8 is a three-dimensional view of the blades of the portable fan of the present invention from another angle. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0015] The terms "first," "second," and the like in this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0016] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0017] Option 1

[0018] 1-3 , the fan blade 11 includes a fan blade connector and a fan blade member. The fan blade connector includes an annular impeller 24 and a connecting arm 25. The annular impeller 24 is annular. One end of the connecting arm 25 is connected to the inner ring wall of the annular impeller 24, and the other end of the connecting arm 25 is fixed to the outer wall of the fan blade cover 26. A plurality of fan blade members are evenly fixed on the top surface 29 and the bottom surface 30 of the annular impeller 24 along the circumferential direction of the fan blade cover 26. The fan blade member is arc-shaped. The fan blade member includes a first blade 27 and a second blade 28 extending along the axial portion of the rotating axis of the fan blade 11 and arranged circumferentially. At least a portion of the first blade 27 is located on the top surface 29 of the annular impeller 24, and at least a portion of the second blade 28 is located on the bottom surface 30 of the annular impeller 24. The fan blade member is arc-shaped, which increases the wind-guiding ability of the fan blade member.

[0019] It should be noted that the annular impeller 24 is in a circular ring shape, the annular impeller may also be in an elliptical ring shape, and in some embodiments the annular impeller 24 may also be in a polygonal shape.

[0020] The fan blade component includes a first blade 27 and a second blade 28 that partially extend along the axial direction of the rotation axis of the fan blade 11 and are arranged along the circumferential direction, which means that the fan blade 11 has a rotation axis that rotates around the central axis, a portion of the first blade 27 extends along the axial direction of the rotation axis, a portion of the second blade 28 extends along the axial direction of the rotation axis, and the first blade 27 and the second blade 28 are arranged along the circumferential direction on the annular impeller.

[0021] Of course, a portion of the first blade 27 and the second blade 28 can form a certain angle with the annular impeller, which can be 60 degrees to 89 degrees. In other embodiments, they can also bend and extend along the circumferential direction of the annular impeller 24. There is no limitation here, as long as they can promote air flow.

[0022] There are gaps between the multiple first blades 27, and gaps between the multiple second blades 28. The gaps can accommodate air. When the fan blade 11 rotates, the air pressure in places with greater fluid flow rates is lower than in other places. The air in other places will replenish air in places with lower air pressure, that is, air will be replenished from between the first blades 27 and the second blades 28 and the fan blade cover 26. Wind enters in the axial direction of the fan blade 11 to fill the gaps, and the wind is pushed out in the approximate tangential direction of the rotation direction of the fan blade 11.

[0023] The height of the first blade 27 located on the top surface 29 of the annular impeller 24 is greater than the height of the second blade 28 located on the top surface 29 of the annular impeller 24, and the height of the second blade 28 located on the bottom surface 30 of the annular impeller 24 is greater than the height of the first blade 27 located on the bottom surface 30 of the annular impeller 24, which can effectively push air and improve the pushing efficiency of the fan blade 11.

[0024] The first blade 27 includes a first end 31 close to the annular impeller 24 and a second end 32 away from the annular impeller 24, and the first end 31 is flush with the bottom surface 30 of the annular impeller 24. The second blade 28 includes a third end 33 close to the annular impeller 24 and a fourth end 34 away from the annular impeller 24, and the third end 33 is flush with the top surface 29 of the annular impeller 24. The flushing of the top surface 29 and the bottom surface 30 can maximize the use of the gap to push air, thereby improving the pushing efficiency of the fan blade 11.

[0025] In another embodiment, the first blade 27 includes a first end 31 close to the annular impeller 24 and a second end 32 away from the annular impeller 24, and the first end 31 is not flush with the annular impeller 24. The second blade 28 includes a third end 33 close to the annular impeller 24 and a fourth end 34 away from the annular impeller 24, and the third end 33 is not flush with the annular impeller 24. The first end 31 and the third end 33 are not flush. When the fan blade 11 rotates, the first end 31 and the third end 33 can also push air, thereby improving the pushing efficiency of the fan blade 11.

[0026] The first blade 27 bends and extends outward in the radial direction of the fan blade and extends out of the top surface of the annular impeller 24. The second blade 28 bends and extends outward in the radial direction of the fan blade and extends out of the bottom surface of the annular impeller 24. It should be pointed out that the radial outward bending and extending here can refer to extending in the radial direction toward the fan blade cover 26 or extending in the radial direction away from the fan blade cover 26, or extending in the radial direction both toward the fan blade cover 26 and away from the fan blade cover. There is no restriction here. The first blade 27 and the second blade 28 extend out of the annular impeller so that airflow will flow between the first blade 27 and the second blade 28, complementing each other's airflow so that the blades can push the airflow out, thereby increasing the air volume.

[0027] The length of the first side 35 of the connecting arm 25 is greater than the length of the second side 36 of the connecting arm 25. The ratio of the large radius of the outer wall of the annular impeller 24 to the small radius of the inner wall is 0.5 to 1.5. The ratio of the diameter of the annular impeller 24 to the inner diameter of the fan cover 26 is 0.5 to 1.5. The distance between the inner wall of the annular impeller 24 and the outer wall of the fan cover 26 is 1 to 5 mm, which makes the weight of the entire fan blade 11 lighter and the air supply efficiency better. Of course, the specific values ​​are not considered to be limited here, as long as the air outlet effect can be guaranteed.

[0028] The first blade 27 and the second blade 28 are staggered. The first blade 27 and the second blade 28 are arranged in an alternating manner. It can be understood that the first blade 27 is located between the two second blades 28, which speeds up the air supply efficiency and rationally utilizes the spatial structure.

[0029] The first blade 27 and the second blade 28 include a windward surface and a leeward surface. The windward surface is concave to form an inner arc, and the leeward surface is convex to form an outer arc. When the fan blades are rotated, the fan blades with the inner arc can push more air, thereby increasing the air volume and improving the air supply efficiency.

[0030] The fan cover 26 has a storage cavity on one side facing the second blade 28, and the storage cavity is used to accommodate driving components such as the motor to prevent the motor and other driving components from disrupting the air path, ensuring that the air path is not disturbed and preventing the air supply efficiency from being reduced.

[0031] Referring to Figure 4, it should be pointed out that the fan blades 11 in this embodiment can be applied to various fan fields, including but not limited to: neck hanging fans, handheld fans, desktop fans, floor fans and baby stroller fans, etc., which need to promote air circulation, and can be installed inside the above products.

[0032] Option 2

[0033] 5-8 , the portable fan includes a first bracket 10 and fan blades 11. An air duct and an air outlet 12 connected to the air duct are provided in the first bracket 10. The fan blades 11 are installed in the first bracket 10. The fan blades 11 are used to provide airflow to the air duct so that air can be discharged from the air outlet 12. The first bracket 10 also has an air inlet 13 and an air inducing member 14 in the air duct. When the airflow in the air duct passes through the air inducing member 14, a negative pressure is formed on the side of the air inducing member 14 away from the fan blades 11, so that the external airflow outside the first bracket 10 enters the air duct through the air inlet 13, thereby achieving the effect of doubling the air volume.

[0034] The air-inducing member 14 includes a first baffle 15 that partially faces the fan blades 11. The first baffle 15 guides the airflow direction in the air duct to flow toward the air outlet 12 along the surface of the first baffle 15. The first baffle 15 is closer to the fan blades 11 than the air inlet 13. The first baffle 15 guides the wind generated by the rotation of the motor on the fan blades 11, so that part of the generated wind does not face the air inlet 13. The air pressure in the area with high wind (fluid) flow rate is lower than the air pressure in other areas, that is, the air pressure on the side of the first baffle 15 close to the fan blades 11 is less than the air pressure generated on the side of the first baffle 15 away from the fan blades 11, and the air inlet 13 is connected to the air inlet 13 relative to the side away from the fan blades 11. The air inlet 13 is connected to the outside air, and the outside air enters the first bracket 10 through the air inlet 13, and the compensation air volume enters the first bracket 10, achieving the effect of doubling the air volume.

[0035] The air inducing member 14 also includes a second partition 16 that partially protrudes toward the fan blade 11. There is a first gap 17 between the second partition 16 and the first partition 15. The distance of the first gap 17 is 0.5mm to 8mm. Further optionally, the distance of the first gap 17 is 2mm, which better improves the air intake efficiency.

[0036] The first bracket 10 also includes a top wall 18, a bottom wall 19, a first side wall 20 and a second side wall 21. The top wall 18 connects one side of the first side wall 20 and the second side wall 21, and the bottom wall 19 connects the other side of the first side wall 20 and the second side wall 21. The first partition 15, the first side wall 20, the second side wall 21, the top wall 18 and the bottom wall 19 enclose part of the air duct to prevent wind from leaking out from other places.

[0037] The air outlet 12 is arranged on the first side wall 20 of the first bracket 10, and the air inlet 13 is at least partially arranged on the second side wall 21 of the first bracket 10, so that external air enters the first bracket 10 through the air inlet 13. It can be understood that the air inlet 13 can be partially arranged on the second side wall 21, or the air inlet 13 can be entirely arranged on the second side wall 21. There is no restriction here. The air inlet 13 is arranged on the second side wall 21 to better improve the air intake efficiency.

[0038] In an optional implementation, the top wall 18 and / or the bottom wall 19 are at least partially provided with the air inlet 13. The top wall 18 and the bottom wall 19 can be provided with the air inlet 13, or the top wall 18 is provided with the air inlet 13, or the bottom wall 19 is provided with the air inlet 13, and there is no limitation here.

[0039] The fan blade 11 includes a fan blade connector and a fan blade member, and the fan blade connector includes a first connector 24 and a second connector 25. The first connector 24 is annular, one end of the second connector 25 is connected to the inner ring wall of the first connector 24, and the other end of the second connector 25 is fixed to the outer wall of the fan blade cover 26. A plurality of the fan blade members are evenly fixed on the top surface 29 and the bottom surface 30 of the first connector 24 along the circumferential direction of the fan blade cover 26. The fan blade member is arc-shaped, and the fan blade member includes an axial extension along the rotation axis of the fan blade 11 and The first blade 27 and the second blade 28 are arranged in the circumferential direction, at least part of the first blade 27 is located on the top surface 29 of the first connecting member 24, and at least part of the second blade 28 is located on the bottom surface 30 of the first connecting member 24. The height of the first blade 27 located on the top surface 29 of the first connecting member 24 is greater than the height of the second blade 28 located on the top surface 29 of the first connecting member 24, and the height of the second blade 28 located on the lower surface of the first connecting member 24 is greater than the height of the second blade 28 located on the lower surface of the first connecting member 24.

[0040] The first blade 27 includes a first end 31 close to the first connecting member 24 and a second end 32 away from the first connecting member 24, and the first end 31 is flush with the first connecting member 24. The second blade 28 includes a third end 33 close to the first connecting member 24 and a fourth end 34 away from the first connecting member 24, and the third end 33 is flush with the first connecting member 24, which can generate a larger amount of wind.

[0041] The above is only a preferred embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A fan blade, wherein: include: The fan blade includes a fan blade connecting member and a fan blade member. The fan blade connecting member includes an annular impeller and a connecting arm, one end of the connecting arm is connected to the inner ring wall of the annular impeller, and the other end of the connecting arm is fixed to the outer wall of the fan blade cover. A plurality of the fan blades are fixed to the top and bottom surfaces of the annular impeller along the circumferential direction of the fan blade cover. The wind blade is in an arc shape, and includes a first blade and a second blade that partially extend along the axial direction of the rotating axis of the fan blade and are arranged circumferentially, at least a portion of the first blade is located on the top surface of the annular impeller, and at least a portion of the second blade is located on the bottom surface of the annular impeller.

2. The fan blade according to claim 1, wherein: The height of the first blade located on the top surface of the annular impeller is greater than the height of the second blade located on the top surface of the annular impeller; The height of the second blade located on the bottom surface of the annular impeller is greater than the height of the first blade located on the bottom surface of the annular impeller.

3. The fan blade according to claim 2, wherein: The first blade includes a first end close to the annular impeller and a second end away from the annular impeller, the first end is flush with the bottom surface of the annular impeller, the second blade includes a third end close to the annular impeller and a fourth end away from the annular impeller, the third end is flush with the top surface of the annular impeller.

4. The fan blade according to claim 2, wherein: The first blade includes a first end close to the annular impeller and a second end far away from the annular impeller, the first end is not flush with the annular impeller, and the second blade includes a third end close to the annular impeller and a fourth end far away from the annular impeller, the third end is not flush with the annular impeller.

5. The fan blade according to claim 1, wherein: The first blade and the second blade include a windward surface and a leeward surface. The windward surface is concave inwardly to form an inner arc, and the leeward surface is convex outwardly to form an outer arc.

6. The fan blade according to claim 1, wherein: The first blades are bent and extended outwardly along the radial direction of the fan blades, and extend out of the top surface of the annular impeller.

7. The fan blade according to claim 1, wherein: The second blades are bent and extended outwardly along the radial direction of the fan blades, and extend out of the bottom surface of the annular impeller.

8. The fan blade according to claim 1, wherein: A storage cavity is formed on a side of the fan cover facing the second blade.

9. The fan blade according to claim 1, wherein: The first blades and the second blades are arranged in a staggered manner.

10. A portable fan, wherein: include: The portable fan comprises the fan blades as described in any one of claims 1 to 9, and the portable fan comprises a neck hanging fan, a handheld fan, a small desktop fan and a small stroller fan.

11. A portable fan, wherein: include: A first bracket and a fan blade, wherein an air duct and an air outlet communicated with the air duct are provided in the first bracket, and the fan blade is installed in the first bracket, and the fan blade is used to provide airflow to the air duct so that the air outlet discharges air; Wherein, the first bracket is further provided with an air inlet and an air induction member in the air duct, When the air flow in the air duct passes through the air induction member, the air pressure formed on the side of the air induction member close to the fan blades can be lower than the air pressure formed on the side of the air induction member away from the fan blades, so that the external air flow outside the first bracket enters the air duct through the air inlet.

12. The portable fan according to claim 11, wherein The air inducing member includes a first baffle that partially faces the fan blades, and the first baffle guides the airflow in the air duct to flow toward the air outlet along the surface of the first baffle.

13. The portable fan according to claim 12, wherein: The first partition is closer to the fan blade than the air inlet.

14. The portable fan according to claim 12, wherein: The air inducing member further comprises a second partition plate which partially protrudes toward the fan blades, and a first gap is defined between the second partition plate and the first partition plate.

15. The portable fan according to claim 14, wherein: The distance of the first gap is 0.5 mm to 8 mm.

16. The portable fan according to claim 12, wherein: The first bracket also includes a top wall, a bottom wall, a first side wall and a second side wall, the top wall connects one side of the first side wall and the second side wall, the bottom wall connects the other side of the first side wall and the second side wall, and the first partition, the first side wall, the second side wall, the top wall and the bottom wall enclose part of the air duct.

17. The portable fan according to claim 16, wherein: The air outlet is arranged on the first side wall of the first bracket, and the air inlet is at least partially arranged on the second side wall of the first bracket.

18. The portable fan according to claim 16, wherein: The top wall and / or the bottom wall is at least partially provided with the air inlet.

19. The portable fan according to claim 11, wherein: The air inlet is located at the opposite side of the air outlet.

20. The portable fan according to claim 11, wherein The portable fans include neck hanging fans, handheld fans, small desktop fans and small baby carriage fans.

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