WO2024067238A1 - 扇叶、风扇及风扇灯 - Google Patents

扇叶、风扇及风扇灯 Download PDF

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Publication number
WO2024067238A1
WO2024067238A1 PCT/CN2023/119631 CN2023119631W WO2024067238A1 WO 2024067238 A1 WO2024067238 A1 WO 2024067238A1 CN 2023119631 W CN2023119631 W CN 2023119631W WO 2024067238 A1 WO2024067238 A1 WO 2024067238A1
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WO
WIPO (PCT)
Prior art keywords
blade
fan
leading edge
point
length
Prior art date
Application number
PCT/CN2023/119631
Other languages
English (en)
French (fr)
Inventor
王耀伟
刘行安
张国宝
王小磊
Original Assignee
苏州欧普照明有限公司
欧普照明股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211206982.0A external-priority patent/CN115717611A/zh
Priority claimed from CN202222604396.3U external-priority patent/CN218062795U/zh
Application filed by 苏州欧普照明有限公司, 欧普照明股份有限公司 filed Critical 苏州欧普照明有限公司
Publication of WO2024067238A1 publication Critical patent/WO2024067238A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for

Definitions

  • the present application relates to a fan blade, a fan and a fan lamp, and belongs to the technical field of household appliances.
  • the purpose of the present application is to provide a fan blade, a fan and a fan lamp to solve at least one of the problems of the existing fan lamps, namely, small blowing area, concentrated wind speed and high noise.
  • the present application provides a fan blade, including a blade root, a blade tip, a leading edge connecting the blade root and the blade tip and located on the windward side, and a trailing edge connecting the blade root and the blade tip and located on the leeward side, the leading edge being arranged in a wave shape from the blade root toward the blade tip, the trailing edge being arranged in an arc shape, and the distance between the leading edge and the trailing edge first increases and then decreases from the blade root toward the blade tip.
  • leading edge is provided with a convex portion protruding in a direction away from the trailing edge, the convex portion is arranged close to the blade root, and the trailing edge is bent in a direction away from the leading edge to form an arc.
  • the line between the blade root and the blade tip is defined as the blade length
  • the vertex of the convex portion is the leading edge point
  • the distance between the leading edge point and the trailing edge is greater than the distance between any point on the leading edge and the trailing edge
  • the leading edge point is defined to have a first projection point on the blade length, and the distance between the first projection point and the blade root accounts for 10% to 45% of the blade length.
  • leading edge is provided with a concave portion sunken toward the trailing edge
  • the concave portion is connected to the convex portion
  • the connection point between the convex portion and the concave portion is defined as a tangent point
  • the tangent point is located between the leading edge point and the blade tip
  • the tangent point is defined as having a second projection point on the blade length
  • the distance between the second projection point and the blade root accounts for 35% to 60% of the length of the blade.
  • the lowest plane when the fan blades rotate is defined as the rotation plane, and the distance between the leading edge point and the rotation plane is greater than the distance between any point on the leading edge and the rotation plane.
  • the blade tip includes a first arc, a straight edge, and a second arc, and the two ends of the straight edge are respectively connected to the first arc
  • the first arc is connected to the front edge at one end away from the straight edge
  • the second arc is connected to the rear edge at one end away from the straight edge.
  • the radius of the first arc is 25-80 mm, and the radius of the second arc is 2-10 mm.
  • a line connecting the leading edge and the trailing edge is defined as a chord line
  • a length of the chord line is a chord length
  • the chord length first expands and then contracts.
  • the fan blade includes an upper surface and a lower surface connected to the blade root, blade tip, leading edge and trailing edge, and the distance between the upper surface and the lower surface is defined as the thickness.
  • the thickness of the fan blade first gradually increases and then gradually decreases along the direction from the leading edge to the trailing edge.
  • the thickness of the fan blade reaches a maximum value at 20% to 40% of the chord length measured from the leading edge, the ratio of the maximum value of the fan blade thickness to the chord length corresponding to the thickness ranges from 1% to 15%, and the ratio of the thickness of the trailing edge to the chord length ranges from 0.5% to 3%.
  • the ratio of the thickness of the fan blade on the side close to the blade root to the chord length is in the range of 4% to 20%; the ratio of the thickness of the fan blade on the side close to the blade tip to the chord length is in the range of 2% to 10%.
  • the present application provides a fan, including a hub and the aforementioned fan blades connected to the hub.
  • the line between the leading edge and the trailing edge of the fan blade is defined as the chord line
  • the plane when the fan rotates is the rotation plane
  • the angle between the chord line and the rotation plane ranges from 21° to 36°
  • the angle near the blade tip ranges from 21° to 29°.
  • the present application provides a fan lamp, including a rotating disk and a plurality of the aforementioned fan blades, wherein the plurality of the fan blades can be folded or unfolded and arranged on the rotating disk.
  • the line between the leading edge and the trailing edge of the fan blade is defined as the chord line
  • the plane when the rotating disk rotates is the rotation plane
  • the angle between the chord line and the rotation plane ranges from 21° to 36°
  • the angle near the blade tip ranges from 21° to 29°.
  • the fan blade includes a mounting portion rotatably connected to the rotating disk, and the fan blade is folded or unfolded around the mounting portion relative to the rotating disk.
  • a first line is formed between the center of gravity of the fan blade and the rotation center of the fan light
  • a second line is formed between the rotation center of the mounting portion and the rotation center of the fan light. The angle between the first line and the second line ranges from 0° to 18°.
  • connection point between the fan blade and the rotating disk is defined as the center point
  • the distance between the leading edge and the rotating plane is the blade height
  • the blade height first increases and then decreases from the blade root to the blade tip
  • a leading edge point is provided on the leading edge
  • the blade height reaches a maximum value at the leading edge point
  • the leading edge includes a rapid descent stage and a lowering stage extending from the leading edge point toward the blade tip, the line between the blade tip and the center point is defined as the blade length, the projection of the rapid descent stage on the blade length is the first stage, the projection of the lowering stage on the blade length is the second stage, the ratio of the distance between any point in the first stage and the center point to the length of the blade is not greater than 60%, and the ratio of the distance between any point in the second stage and the center point to the length of the blade is in the range of 60% to 100%.
  • the fan blades of the present application are configured to have a leading edge that expands, contracts, and then expands again in a wave shape from the blade root toward the blade tip, so that the fan blades can divert air when rotating, thereby expanding the air supply range of the fan blades and reducing the air supply pressure per unit area; and by configuring the trailing edge to be an arc, the appearance of the fan blades is beautified while ensuring improved fan blade performance.
  • FIG. 1 is a three-dimensional schematic diagram of a fan lamp according to a preferred embodiment of the present application in a first state.
  • FIG. 2 is a three-dimensional schematic diagram of the fan lamp in the second state according to the preferred embodiment of the present application.
  • FIG. 3 is a three-dimensional schematic diagram of the fan lamp in FIG. 1 from another angle.
  • FIG. 4 is a partial enlarged view of the fan lamp in FIG. 1 .
  • FIG. 5 is a three-dimensional schematic diagram of the fan blade in FIG. 4 .
  • FIG. 6 is a schematic three-dimensional diagram of the fan blade in FIG. 5 from a first angle.
  • FIG. 7 is a schematic cross-sectional view of the fan blade in FIG. 5 along the chord length direction.
  • the fan lamp 100 includes a bracket fixed to a mounting surface (not shown), a shaft, a rotating disk 1, a lamp assembly (not shown) and a fan blade 2, wherein one end of the shaft is fixedly connected to the bracket, and the other end is connected to the rotating disk 1 so that the rotating disk 1 can rotate around the shaft, the fan blade 2 is rotatably connected to the rotating disk 1 and is arranged on a side of the rotating disk 1 close to the shaft, so that the rotating disk 1 can drive the fan blade 2 to rotate synchronously, and the lamp assembly is arranged on a side of the rotating disk 1 away from the shaft and can rotate synchronously with the rotating disk 1 under the drive of the rotating disk 1.
  • the lamp assembly may not rotate synchronously with the rotating disk 1, that is, the lamp assembly is fixedly connected to the shaft,
  • the specific structure of the lamp assembly, the specific structure of the bracket and the shaft, and the connection method of the lamp assembly with the rotating disk 1 and/or the shaft can all be designed according to the existing technology and are not described in detail here.
  • the improvement point of the present application lies in the fan blades 2 and the connection method between the fan blades 2 and the rotating disk 1. The following specification will describe this improvement point.
  • the fan lamp 100 is provided with a plurality of blades 2 connected to the rotating disk 1, and the plurality of blades 2 can be folded or unfolded and arranged on the rotating disk 1.
  • the rotating disk 1 is provided with a mounting hole 12, and one end of the blade 2 is provided with a mounting portion 21 corresponding to the mounting hole 12, and the mounting portion 21 extends into the mounting hole 12 and can rotate in the mounting hole 12, so as to realize the blade 2 and the mounting portion 21.
  • the rotating disk 1 is connected with the fan blade 2 at the end away from the mounting portion 21, and the fan blade 2 is moved around the mounting portion 21 in the direction away from the rotating disk 1 under the action of centrifugal force to achieve the expansion of the fan blade 2.
  • the expanded fan blade 2 is driven by the rotating disk 1 to rotate to achieve external air blowing; when the rotating disk 1 stops rotating, the end of the fan blade 2 away from the mounting portion 21 moves around the mounting portion 21 in the direction close to the rotating disk 1 under the action of inertia to achieve the folding of the fan blade 2.
  • the fan blades 2 also include a guide member 211 connected to the mounting portion 21, and a guide groove 11 corresponding to the guide member 211 is provided on the rotating disk 1.
  • the guide member 211 is received in the guide groove 11.
  • the guide groove 11 is provided on one side of the mounting hole 12 and is arranged in an arc shape.
  • the guide member 211 slides from one end of the guide groove 11 to the other end until the guide member 211 abuts against the other end of the guide groove 11, thereby limiting the fan blades 2 from continuing to rotate relative to the rotating disk 1, so as to push the air to form an airflow to be blown out.
  • three fan blades 2 and three guide members 211 and guide grooves 11 corresponding to the fan blades 2 are provided on the rotating disk 1, and the three fan blades 2 are arranged in a centrally symmetrical shape on the rotating disk 1.
  • the rotating disk 1 can also be provided with other numbers of fan blades 2, such as two, four, five, etc. numbers of fan blades 2, as long as the fan blades 2 are arranged in a centrally symmetrical shape on the rotating disk 1, there is no limitation here.
  • the fan blade 2 includes a blade root 22, a blade tip 23, a leading edge 241 connecting the blade root 22 and the blade tip 23 and located on the windward side, and a trailing edge 251 connecting the blade root 22 and the blade tip 23 and located on the leeward side, wherein the mounting portion 21 is fixedly connected to the blade root 22 at a certain angle, on the one hand, the fan blade 2 is connected to the rotating disk 1 through the mounting portion 21, and on the other hand, the fan blade 2 is tilted so that when the fan blade 2 rotates, it can drive the air flow.
  • the line between the leading edge 241 and the trailing edge 251 is defined as the chord line 26, and the length of the chord line 26 is the chord length.
  • the chord length first expands and then shrinks.
  • the plane formed by the rotating disk 1 when rotating is the rotation plane 32, wherein the installation angle ⁇ between the chord line 26 and the rotation plane 32 ranges from 21° to 36°, and the installation angle ⁇ between the chord line 26 near the blade tip 23 and the rotation plane 32 ranges from 21° to 29°.
  • the fan blade 2 is divided into four equal parts in the direction from the blade root 22 to the blade tip 23, and the installation angle ⁇ between the chord line 26 and the rotation plane 32 within 1/4 of the range near the blade tip 23 ranges from 21° to 29°.
  • the rotation plane 32 can also be understood as the lowest plane when the fan blades 2 rotate, that is, the plane formed by at least part of the rear edge 251 when rotating.
  • the fan blades 2 are connected to the rotating disk 1 so that the rear edges 251 are roughly located on the same plane.
  • the plane formed by the rear edges 251 is the rotation plane 32; when the fan blades 2 gather together, all the rear edges 251 will also form a plane on the rotation plane 32.
  • the rear edges 251 may not be located in the same plane. In this case, when the fan blades 2 rotate, the plane formed by the lowest point of the rear edges 251 is the rotation plane 32, which is not limited here.
  • the connection point between the fan blade 2 and the rotating disk 1 is defined as the center point 20, and the distance between the leading edge 241 and the rotating plane 32 is the blade height 321.
  • the blade height 321 increases first and then decreases from the blade root 22 to the blade tip 23 of the fan blade 2, and the blade height 321 reaches a maximum value at the frontmost point on the leading edge 241 (i.e., the leading edge point 243 in the following text).
  • the blade height 321 increases continuously, and the frontmost point of the leading edge 241 reaches a maximum value.
  • the connecting line between the blade tip 23 and the center point 20 is defined as the blade length 261
  • the projection of the rapid descent stage on the blade length 261 is the first stage
  • the projection of the reduction stage on the blade length 261 is the second stage, wherein the first stage and the second stage are connected, then the ratio of the distance between any point in the first stage and the center point 20 to the length of the blade length 261 is less than 60%, that is, the ratio of the distance between the connection between the first stage and the second stage and the center point 20 to the blade length 261 is 60%
  • the ratio of the distance between any point in the second stage and the center point 20 to the length of the blade length 261 ranges from 60% to 100%, that is, the end of the second stage away from the first stage is located at the blade tip 23.
  • the lowering stage may also include a slow descent stage and a rapid descent stage, wherein the slow descent stage is respectively connected with the rapid descent stage and the rapid descent stage, so that the blade height 321 from the blade root 22 to the blade tip 23 changes as a trend of first increasing, then rapidly decreasing, then slowly decreasing, and finally rapidly decreasing.
  • the leading edge 241 of the fan blade 2 is arranged in a wave shape from the blade root 22 toward the blade tip 23, and the trailing edge 251 is arranged in an arc shape, so that the distance between the leading edge 241 and the trailing edge 251 increases first and then decreases from the blade root 22 toward the blade tip 23.
  • the leading edge 241 includes a convex portion 242 extending from the middle of the leading edge 241 toward a direction away from the trailing edge 251, and the convex portion 242 is arranged near the blade root 22.
  • the convex portion 242 can divert the air, so that the air flows along both sides of the convex portion 242, and then forms an airflow under the push of the fan blade 2 and blows outward, thereby expanding the air supply range of the fan blade 2 and reducing the air supply pressure directly below the fan blade 2.
  • the convex portion 242 is arranged at a position near the blade root 22 in the middle of the leading edge 241, so that the convex portion 242 diverts most of the air to the side away from the blade root 22, further expanding the air supply range of the fan blade 2.
  • connection point between the fan blade 2 and the rotating disk 1 is the blade root 22 of the fan blade 2
  • the line between the blade root 22 and the blade tip 23 is the blade length 261
  • the vertex of the convex portion 242 is defined as the leading edge point 243, that is, in the rotation direction of the fan blade 2
  • the distance between the leading edge point 243 and the trailing edge 251 is greater than the distance between any point on the leading edge 241 and the trailing edge 251
  • the leading edge point 243 is defined to have a first projection point on the blade length 261
  • the distance between the first projection point and the blade root 22 accounts for 10% to 45% of the length of the blade length 261.
  • the distance between the leading edge point 243 and the rotating plane 32 is greater than the distance between any point on the leading edge 241 and the rotating plane 32, that is, the leading edge point 243 is located at the highest point of the fan blade 2 and the leading edge point 243 is located at the front end of the windward side of the fan blade 2.
  • the leading edge 241 is also provided with a concave portion 244 that is concave toward the trailing edge 251, wherein the concave portion 244 is arranged close to the blade tip 23, and one end of the concave portion 244 away from the blade tip 23 is connected to one end of the convex portion 242 away from the blade root 22, so that the leading edge 241 is wavy, and the connection point between the convex portion 242 and the concave portion 244 is defined as the tangent point 245, that is, the tangent point 245 is located between the leading edge point 243 and the blade tip 23, and the tangent point 245 has a second projection point on the blade length 261, and the second projection point is between the blade root 22
  • the distance between the first projection point and the blade root 22 accounts for 35% to 60% of the length of the blade length 261.
  • the ratio of the distance between the second projection point and the blade root 22 to the length of the blade length 261 is not less than 35% and not more than 60%; when the distance between the first projection point and the blade root 22 accounts for 45% of the length of the blade length 261, the ratio of the distance between the second projection point and the blade root 22 to the length of the blade length 261 is greater than 45% and not more than 60%, so that the tangent point 245 can always be located between the leading edge point 243 and the blade tip 23.
  • the trailing edge 251 bends in a direction away from the leading edge 241 and forms an arc.
  • the curve where the trailing edge 251 is located is a curve in which the second-order derivative in the radial direction corresponding to the curve changes continuously, and the chord length of the fan blade 2 first expands and then shrinks along the direction from the blade root 22 to the blade tip 23, and finally shrinks sharply.
  • This arrangement realizes the diversion of air and expands the air supply area, and on the other hand, beautifies the appearance of the fan blade 2.
  • the fan blade 2 also includes a leading edge portion 24 arranged on the windward side and a trailing edge portion 25 arranged on the leeward side, a trailing edge 251 is located at the edge of the trailing edge portion 25 away from the fan blade 2, the leading edge portion 24 is in an arc shape, and the leading edge 241 is located at the edge of the leading edge portion 24 away from the fan blade 2, the angle corresponding to the arc of the leading edge portion 24 is greater than 90° and less than or equal to 180°, and the ratio of the radius corresponding to the arc to the chord length ranges from 0.25% to 3%.
  • Such an arrangement reduces the sound of the fan blade 2 cutting the air when the fan blade 2 rotates, and further reduces the noise generated when the fan blade 2 rotates.
  • the fan blade 2 also includes an upper surface 27 and a lower surface 28, wherein the upper surface 27 and the lower surface 28 are respectively connected to the blade root 22, the blade tip 23, the leading edge 241 and the trailing edge 251, and the upper surface 27 is arranged on the side of the fan blade 2 away from the lamp assembly, and the lower surface 28 is arranged on the side of the fan blade 2 close to the lamp assembly.
  • the upper surface 27 protrudes outwards and the lower surface 28 is recessed inwards.
  • the distance between the upper surface 27 and the lower surface 28 is defined as the thickness.
  • the thickness of the fan blade 2 gradually increases and then gradually decreases from the leading edge 241 to the trailing edge 251.
  • the thickness gradually increases and then gradually decreases from the leading edge 241 to the trailing edge 251.
  • Such a configuration generates a higher pressure difference between the upper and lower surfaces 28 of the fan blade 2 to increase the air supply of the fan blade 2.
  • the thickness of the fan blade 2 in the cross section of the fan blade 2 in the direction of the chord line 26 there is a maximum thickness between the leading edge 241 and the trailing edge 251, and the thickness reaches a maximum value at 20% to 40% of the chord length measured from the leading edge 241, i.e., the maximum thickness 29.
  • the ratio of the maximum thickness 29 to the chord length corresponding to the maximum thickness 29 ranges from 1% to 15%, and the ratio of the thickness of the trailing edge 25 to the chord length ranges from 0.5% to 3%. That is to say, the thickness of the fan blade 2 in the cross section in the direction of the chord line 26 is uneven, and is thin on both sides and thick in the middle.
  • the maximum thickness 29 of the fan blade 2 is set close to the leading edge 241, and the thickness of the fan blade 2 is in a certain ratio to the chord length.
  • the ratio of the thickness of the blade 2 near the blade root 22 to the chord length is in the range of 6% to 20%; the ratio of the thickness of the blade 2 near the blade tip 23 to the chord length is in the range of 2% to 10%.
  • the blade is divided into two equal parts along the direction from the blade root 22 to the blade tip 23, and the ratio of the cross-sectional thickness of the 1/2 blade 2 near the blade root 22 along the chord length line 26 to the chord length is in the range of 4% to 20%; the ratio of the cross-sectional thickness of the 1/2 blade 2 near the blade tip 23 along the chord length line 26 to the chord length is in the range of 2% to 10%.
  • the blade 2 is divided into two equal-length sections, and the thickness of the section near the blade root 22 is greater than that of the section near the blade tip 23, so that the weight of the blade 2 is reduced while ensuring the strength and increasing the air supply.
  • the line connecting the centers of multiple inscribed circles in the cross section of the fan blade 2 along this direction is defined as the center arc line 30, and the maximum distance between the center arc line 30 and the chord line 26 is the maximum curvature 31.
  • the ratio of the distance between the maximum curvature 31 in each cross section of the fan blade 2 and the leading edge 241 to the chord length is in the range of 0.4:1 to 0.5:1, that is, the distance between the maximum curvature 31 and the leading edge 241 accounts for 40% to 50% of the chord length.
  • the ratio of the maximum curvature 31 in each cross section of the fan blade 2 to the chord length corresponding to the maximum curvature 31 is in the range of 6% to 12%. That is to say, the maximum curvature 31 of the fan blade 2 is set close to the blade root 22 to increase the air supply of the fan blade 2.
  • the blade tip 23 of the fan blade 2 also includes a first arc 231, a straight edge 233 and a second arc 232 which are connected to each other.
  • the two ends of the straight edge 233 are respectively connected to the first arc 231 and the second arc 232.
  • the end of the first arc 231 away from the straight edge 233 is connected to the leading edge 241, and the end of the second arc 232 away from the straight edge 233 is connected to the trailing edge 251.
  • the radius corresponding to the first arc 231 is 25 to 80 mm
  • the radius corresponding to the second arc 232 is 2 to 10 mm.
  • This arrangement is used to control the turbulence direction of the airflow at the blade tip 23, so that the air can be diverted along the first arc 231 and the second arc 232 when contacting the first arc 231 and the second arc 232, thereby controlling the direction of the airflow at the blade tip 23.
  • the turbulence direction of the airflow is controlled by the first arc 231 and the second arc 232, thereby reducing the noise generated by the fan blade 2 when it rotates.
  • the center of gravity of the entire blade 2 is located in the vicinity of the leading edge 24, specifically in the convex portion 242. This arrangement allows the blade 2 to balance the aerodynamic force, centrifugal force, and torsion of the unfolding spring during rotation, thereby enhancing the stability of operation. Specifically, the blade 2 of this embodiment and the existing blades were tested.
  • the weight of the blade 2 in this embodiment is reduced by about 25% to 40% compared with the weight of the existing blades; in terms of air supply angle, the wide angle of air supply of the blade 2 in this embodiment is increased by about 20% compared with the wide angle of air supply of the existing blades; in terms of air supply volume, the air supply volume of the blade 2 in this embodiment is increased by about 10% to 20% compared with the air supply volume of the existing blades.
  • the fan blades 2 are rotatably connected to the rotating disk 1, and the fan blades 2 can be folded or unfolded by rotating the rotating disk 1.
  • the rotating disk 1 is matched with the lamp assembly to meet people's needs for different functions, thereby improving the practicality of the fan lamp 100.
  • the fan blade 2 can also be directly used in a fan (not shown), in which case the mounting portion 21 and the guide member 211 are not provided on the fan blade 2.
  • the fan includes a hub (not shown) and a fan blade 2 connected to the hub, and the blade root 22 of the fan blade 2 is directly and fixedly connected to the hub at a certain angle, wherein a line connecting the leading edge 241 to the trailing edge 251 of the fan blade 2 and perpendicular to the direction from the blade root 22 to the blade tip 23 is defined as a chord line 26, and the plane when the fan rotates is a rotation plane 32, and the chord line 26 and the rotation plane 3 2 has an installation angle ⁇ range of 21° to 36°, and an installation angle ⁇ range of 21° to 29° near the blade tip 23.
  • the fan blade is divided into four equal parts in the direction from the blade root 22 to the blade tip 23, and the installation angle ⁇ range of 21° to 29° between the chord line 26 within 1/4 range near the blade tip 23 and the rotation plane 32 is 21° to 29°.
  • the center point 20 is the connection point between the fan blade 2 and the hub, and the change trend of the blade height 321 of the fan blade 2 is the same as when the fan blade 2 is used for the fan lamp 100, and no limitation is made here.
  • the fan blade 2 of the present application is configured such that the leading edge 241 is wavy in shape from the blade root 22 toward the blade tip 23, first expanding, then contracting, and then expanding again, so that the fan blade 2 can divert the air when rotating, thereby expanding the air supply range of the fan blade 2 and reducing the air supply pressure per unit area; by configuring the trailing edge 251 to be arc-shaped, the fan blade 2 is improved in performance while ensuring the improvement of performance.
  • the turbulence direction of the airflow at the blade tip 23 is controlled, while reducing the noise generated by the fan blade 2 when it rotates.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种扇叶（2）、风扇及风扇灯（100），扇叶（2）包括叶根（22）、叶梢（23）、连接叶根（22）和叶梢（23）并位于迎风一侧的前缘边（241）以及连接叶根（22）和叶梢（23）并位于背风一侧的后缘边（251），前缘边（241）自叶根（22）朝向叶梢（23）呈波浪状设置，后缘边（251）呈弧形设置，并使得前缘边（241）和后缘边（251）之间的距离自叶根（22）朝向叶梢（23）先增大后减小。

Description

扇叶、风扇及风扇灯
本申请要求了申请日为2022年9月30日，申请号为202211206982.0，发明名称为“扇叶、风扇及风扇灯”以及申请日为2022年9月30日，申请号为202222604396.3，发明名称为“扇叶、风扇及风扇灯”的中国专利申请的优先权，这些专利申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种扇叶、风扇及风扇灯，属于家用电器技术领域。
背景技术
目前，随着人们生活水平的逐渐提高，大出风量、大吹风角度、低噪音的风扇灯是人们迫切的需求，然而，目前市面上的风扇灯产品大多数风量足够，但存在吹风区域偏小、吹风区域的风速偏于集中、风扇灯下存在“扑扑”的周期性噪声、送风风压冲击感强以及抖动概率高等现象，给用户带来了较差的使用体验。
有鉴于此，确有必要对现有的风扇灯提出改进，以解决上述问题。
发明内容
本申请的目的在于提供一种扇叶、风扇及风扇灯，以解决现有风扇灯吹风区域小、风速集中以及噪音大中的至少一个问题。
为实现上述目的，本申请提供了一种扇叶，包括叶根、叶梢、连接所述叶根和叶梢并位于迎风一侧的前缘边以及连接所述叶根和叶梢并位于背风一侧的后缘边，所述前缘边自所述叶根朝向所述叶梢呈波浪状设置，所述后缘边呈弧形设置，并使得所述前缘边和所述后缘边之间的距离自所述叶根朝向所述叶梢先增大后减小。
进一步地，所述前缘边设有朝远离所述后缘边的方向突出的凸部，所述凸部靠近所述叶根设置，所述后缘边朝远离所述前缘边的方向弯曲并形成弧形。
进一步地，定义所述叶根与所述叶梢之间的连线为叶长，所述凸部的顶点为前缘点，在所述扇叶的旋转方向上，所述前缘点与所述后缘边之间的距离大于所述前缘边上任意一点与所述后缘边之间的距离，定义所述前缘点在所述叶长上具有第一投影点，所述第一投影点与所述叶根之间的距离占所述叶长长度的10％～45％。
进一步地，所述前缘边设有朝向所述后缘边凹陷的凹部，所述凹部与所述凸部连接，定义所述凸部与所述凹部的连接点为切点，所述切点位于所述前缘点和所述叶梢之间，定义所述切点在所述叶长上具有第二投影点，所述第二投影点与所述叶根之间的距离占所述叶长长度的35％～60％。
进一步地，所述扇叶组装后，定义所述扇叶转动时的最低平面为旋转平面，所述前缘点与所述旋转平面之间的距离大于所述前缘边上任意一点与所述旋转平面之间的距离。
进一步地，所述叶梢包括第一圆弧、直边和第二圆弧，所述直边的两端分别与第一圆弧 和第二圆弧连接，所述第一圆弧远离所述直边的一端与所述前缘边连接，所述第二圆弧远离所述直边的一端与所述后缘边连接。
进一步地，所述第一圆弧的半径为25-80mm，所述第二圆弧的半径为2-10mm。
进一步地，在垂直于叶根至叶梢的方向上，定义所述前缘边与所述后缘边之间的连线为弦长线，所述弦长线的长度为弦长，在叶根至叶梢的方向上，所述弦长先扩大后缩小。
进一步地，所述扇叶包括与所述叶根、叶梢、前缘边和后缘边连接的上表面和下表面，定义所述上表面与所述下表面之间的距离为厚度，所述扇叶的厚度沿所述前缘边至后缘边方向先逐渐增大再逐渐减小。
进一步地，所述扇叶的厚度在从所述前缘边测量的弦长的20％～40％长度中达到最大值，所述扇叶厚度的最大值与该厚度所对应的弦长的比值范围为1％～15％，所述后缘边的厚度与所述弦长的比值范围为0.5％～3％。
进一步地，所述扇叶靠近叶根一侧的厚度与所述弦长的比值范围为4％～20％；所述扇叶靠近叶梢一侧的厚度与所述弦长的比值范围为2％～10％。
为实现上述目的，本申请提供了一种风扇，包括轮毂以及与所述轮毂连接的前述的扇叶。
进一步地，在垂直于叶根至叶梢的方向上，定义扇叶的前缘边与后缘边之间的连线为弦长线，所述风扇转动时的平面为旋转平面，所述弦长线与所述旋转平面之间的夹角范围为21°～36°，且靠近所述叶梢处的夹角范围为21°～29°。
为实现上述目的，本申请提供了一种风扇灯，包括转动盘以及多个前述的扇叶，多个所述扇叶可收合或展开地设置于所述转动盘。
进一步地，在垂直于叶根至叶梢的方向上，定义扇叶的前缘边与后缘边之间的连线为弦长线，所述转动盘转动时的平面为旋转平面，所述弦长线与所述旋转平面之间的夹角范围为21°～36°，且靠近所述叶梢处的夹角范围为21°～29°。
进一步地，所述扇叶包括与所述转动盘转动连接的安装部，所述扇叶绕所述安装部相对于所述转动盘收合或展开，当所述扇叶展开时，所述扇叶的重心与所述风扇灯的旋转中心之间形成第一连线，所述安装部的旋转中心与所述风扇灯的旋转中心之间形成第二连线，所述第一连线与所述第二连线之间的夹角范围为0°～18°。
进一步地，定义所述扇叶与所述转动盘的连接点为中心点，所述前缘边与所述旋转平面之间的距离为叶高，所述叶高自所述叶根至所述叶梢呈先增大后缩小，所述前缘边上设有前缘点，所述叶高在所述前缘点处达到最大值。
进一步地，所述前缘边包括自所述前缘点朝向所述叶梢延伸的快速下降阶段和降低阶段，定义所述叶梢与所述中心点之间的连线为叶长，所述快速下降阶段在所述叶长上的投影为第一阶段，所述降低阶段在所述叶长上的投影为第二阶段，所述第一阶段中的任意一点和所述中心点之间的距离与所述叶长长度的比值不大于60％，所述第二阶段中的任意一点和所述中心点之间的距离与所述叶长长度的比值范围为60％～100％。
本申请的有益效果是：本申请的扇叶通过将前缘边设为自叶根朝向叶梢呈先扩张后收缩再扩张的波浪状，使得扇叶在转动时能够对空气进行分流，扩大了扇叶的送风范围，同时减弱了单位面积的送风风压；通过将后缘边设为弧形，从而在保证提升扇叶性能的同时美化扇叶的外观。
附图说明
图1是本申请优选实施例的风扇灯在第一状态下的立体示意图。
图2是本申请优选实施例的风扇灯在第二状态下的立体示意图。
图3是图1中风扇灯的另一角度立体示意图。
图4是图1中风扇灯的局部放大图。
图5是图4中扇叶的立体示意图。
图6是图5中扇叶的第一角度立体示意图。
图7是图5中扇叶沿弦长线方向的截面示意图。
附图标记说明：100-风扇灯，1-转动盘，11-导向槽，12-安装孔，13-第一连线，14-第二连线；2-扇叶，20-中心点，21-安装部，211-导向件，22-叶根，23-叶梢，231-第一圆弧，232-第二圆弧，233-直边，24-前缘部，241-前缘边，242-凸部，243-前缘点，244-凹部，245-切点，25-后缘部，251-后缘边，26-弦长线，261-叶长，27-上表面，28-下表面，29-最大厚度，30-中弧线，31-最大弯度，32-旋转平面，321-叶高，β-安装角。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面结合附图和具体实施例对本申请进行详细描述。
请参阅图1至图4所示，本申请揭示了一种风扇灯100，将灯具和风扇相结合，以满足人们对不同功能的需求，同时提高产品的实用性。具体的，风扇灯100包括与安装面(未图示)固定的挂架、轴杆、转动盘1、灯具组件(未图示)及扇叶2，其中，轴杆的一端与挂架固定连接，另一端与转动盘1连接并使得转动盘1能够绕轴杆转动，扇叶2与转动盘1转动连接并设于转动盘1靠近轴杆的一侧，使得转动盘1能够带动扇叶2同步转动，灯具组件设于转动盘1远离轴杆的一侧且能够在转动盘1的带动下与转动盘1同步转动，当然，在其他实施例中，灯具组件也可以不与转动盘1同步转动，即灯具组件与轴杆固定连接，转动盘1相对于灯具组件转动，此处不做限制。
本实施例中，灯具组件的具体结构、挂架和轴杆的具体结构、灯具组件与转动盘1和/或轴杆的连接方式均可以按照现有技术进行设计，此处不作详细描述，本申请的改进点在于扇叶2及扇叶2与转动盘1的连接方式，以下说明书内容将针对该改进点进行叙述。
风扇灯100设有多个与转动盘1连接的扇叶2，且多个扇叶2可收合或展开地设置于转动盘1，具体的，转动盘1上设有安装孔12，扇叶2的一端设有与安装孔12相对应的安装部21，安装部21伸入安装孔12内并能够在安装孔12内转动，以实现扇叶2与安装部21 的转动连接，当转动盘1转动时，扇叶2远离安装部21的一端在离心力的作用下绕安装部21朝向远离转动盘1的方向移动，以实现扇叶2的展开，展开的扇叶2在转动盘1的带动下旋转，以实现对外吹风；当转动盘1停止转动时，扇叶2远离安装部21的一端在惯性的作用下绕安装部21朝向靠近转动盘1的方向移动，以实现扇叶2的收合。
优选的，扇叶2还包括与安装部21连接的导向件211，转动盘1上开设有与导向件211相对应的导向槽11，当安装部21收容在安装孔12内时，导向件211收容在导向槽11内，导向槽11设于安装孔12的一侧且呈圆弧状设置，当扇叶2收合在转动盘1内时，导向件211与导向槽11的一端抵接，当转动盘1转动时，扇叶2在离心力的作用下展开，与此同时，导向件211自导向槽11的一端向另一端滑动直至导向件211与导向槽11的另一端抵接，限制扇叶2相对于转动盘1继续转动，以推动空气形成气流向外吹出。
本实施例中，转动盘1上设有三个扇叶2以及与扇叶2相对应的三个导向件211和导向槽11，且三个扇叶2在转动盘1上呈中心对称状设置，当然，在其他实施例中，转动盘1上也可以设置为其它数量的扇叶2，例如两个、四个、五个等数量的扇叶2，只要扇叶2在转动盘1上呈中心对称状设置即可，此处不做限制。
请参阅图1和图5所示，扇叶2包括叶根22、叶梢23、连接叶根22和叶梢23并位于迎风一侧的前缘边241以及连接叶根22和叶梢23并位于背风一侧的后缘边251，其中，安装部21与叶根22呈一定角度固定连接，一方面通过安装部21将扇叶2与转动盘1连接，另一方面使得扇叶2倾斜设置，以在扇叶2转动时，能够驱动空气流动。
结合图3所示，在垂直于叶根22至叶梢23的方向上，定义前缘边241与后缘边251之间的连线为弦长线26，弦长线26的长度为弦长，在叶根22至叶梢23的方向上，弦长先扩大后缩小，转动盘1在转动时形成的平面为旋转平面32，其中，弦长线26与旋转平面32之间的安装角β范围为21°～36°，靠近叶梢23部分的弦长线26与旋转平面32之间的安装角β范围为21°～29°，优选的，在叶根22至叶梢23的方向上将扇叶2四等分，靠近叶梢23的1/4范围内的弦长线26与旋转平面32之间的安装角β范围为21°～29°。
具体的，因本申请的扇叶2组装时呈立体状，故旋转平面32也可以理解为扇叶2转动时的最低平面，即至少部分后缘边251在转动时所形成的平面，在本实施例中，扇叶2与转动盘1连接，使得后缘边251大致位于同一平面上，扇叶2转动时，后缘边251形成的平面即为旋转平面32；当扇叶2聚拢时，所有的后缘边251也会在该旋转平面32上组成一个平面。当然，在其它实施例中，后缘边251也可以不位于同一平面内，此时扇叶2转动时，后缘边251的最低点所形成的平面即为旋转平面32，此处不做限制。
定义扇叶2与转动盘1的连接点为中心点20，前缘边241与旋转平面32之间的距离为叶高321，具体的，叶高321自扇叶2的叶根22至叶梢23呈先增大后缩小的趋势，且叶高321在前缘边241上最前端的点(即后文中的前缘点243)处达到最大值，本实施例中，在前缘边241最前端的点至叶根22的范围内，叶高321呈不断增大的趋势，前缘边241最前 端的点向叶梢23延伸的范围内存在快速下降阶段和降低阶段，定义叶梢23和中心点20之间的连线为叶长261，快速下降阶段在叶长261上的投影为第一阶段，降低阶段在叶长261上的投影为第二阶段，其中，第一阶段和第二阶段连接，则在第一阶段中的任意一点和中心点20之间的距离与叶长261长度的比值小于60％，即，第一阶段和第二阶段的连接处与中心点20之间的距离与叶长261的比值为60％；第二阶段中的任意一点和中心点20之间的距离与叶长261长度的比值范围为60％～100％，即第二阶段远离第一阶段的一端位于叶梢23处。
当然，在其它实施例中，降低阶段还可以包括缓慢下降阶段和急速下降阶段，其中，缓慢下降阶段分别与快速下降阶段和急速下降阶段连接，使得叶根22至叶梢23的叶高321变化为先增大、然后快速下降、随后缓慢下降、最后再急速下降的变化趋势。
请参阅图4所示，在转动盘1转动的情况下，即风扇灯100的扇叶2在展开时，将扇叶2的重心与风扇灯100的旋转中心之间的连线定义为第一连线13，将安装部21旋转中心与风扇灯100旋转中心之间的连线定义为第二连线14，其中，第一连线13和第二连线14之间的夹角范围为0°～18°，且在转动盘1的转动方向上，第一连线13位于第二连线14的后方。
请参阅图5至图7所示，扇叶2的前缘边241自叶根22朝向叶梢23呈波浪状设置，后缘边251呈弧形设置，并使得前缘边241和后缘边251之间的距离自叶根22朝向叶梢23先增大后减小，具体的，前缘边241包括自前缘边241的中部朝向远离后缘边251的方向延伸的凸部242，凸部242靠近叶根22设置，在扇叶2转动时，凸部242能够对空气进行分流，使得空气沿凸部242的两侧流动，随后在扇叶2的推动下形成气流并向外吹出，实现了扩大扇叶2的送风范围，同时减弱了扇叶2正下方的送风风压。凸部242设于前缘边241中部靠近叶根22的位置，使得凸部242将大部分空气分流至远离叶根22的一侧，进一步扩大了扇叶2的送风范围。
具体的，扇叶2与转动盘1的连接点即为扇叶2的叶根22，叶根22与叶梢23之间的连线即为叶长261，定义凸部242的顶点为前缘点243，即，在扇叶2的旋转方向上，前缘点243与后缘边251之间的距离大于前缘边241上任意一点与后缘边251之间的距离，与此同时，定义前缘点243在叶长261上具有第一投影点，第一投影点与叶根22之间的距离占叶长261长度的10％～45％。换句话说，当扇叶2转动进行送风时，前缘点243与旋转平面32之间的距离大于前缘边241上任意一点与旋转平面32之间的距离，即前缘点243位于扇叶2的最高点且前缘点243位于扇叶2迎风侧的最前端。
前缘边241上还设有朝向后缘边251凹陷的凹部244，其中，凹部244靠近叶梢23设置，且凹部244远离叶梢23的一端与凸部242远离叶根22的一端连接，使得前缘边241呈现波浪状，定义凸部242与凹部244的连接点为切点245，也就是说，切点245位于前缘点243和叶梢23之间，切点245在叶长261上具有第二投影点，第二投影点与叶根22之间 的距离占叶长261长度的35％～60％。举例来讲，当第一投影点与叶根22之间的距离占叶长261长度的10％时，第二投影点与叶根22之间的距离与叶长261长度的比值不小于35％且不大于60％；当第一投影点与叶根22之间的距离占叶长261长度的45％时，第二投影点与叶根22之间的距离与叶长261长度的比值大于45％且不大于60％，使得切点245能够始终位于前缘点243和叶梢23之间。
后缘边251朝远离前缘边241的方向弯曲并形成弧形，具体的，后缘边251所在的曲线为该曲线对应的半径方向的二阶导数变化连续，且扇叶2的弦长沿叶根22至叶梢23方向呈先扩大后缩小，最后急剧收缩，如此设置，一方面实现对空气的分流，扩大送风面积，另一方面美化了扇叶2的外观。
扇叶2还包括设于迎风一侧的前缘部24和设于背风一侧的后缘部25，后缘边251位于后缘部25远离扇叶2的边缘，前缘部24呈圆弧状，前缘边241位于前缘部24远离扇叶2的边缘，前缘部24的圆弧所对应的角度大于90°且小于等于180°，该圆弧所对应的半径与弦长的比值范围为0.25％～3％。如此设置，使得在扇叶2转动时，降低扇叶2切割空气的声音，进一步降低了扇叶2转动时产生的噪音。
扇叶2还包括上表面27和下表面28，其中，上表面27和下表面28均分别与叶根22、叶梢23、前缘边241和后缘边251连接，且上表面27设于扇叶2远离灯具组件的一侧，下表面28设于扇叶2靠近灯具组件的一侧，具体的，上表面27向外凸出，下表面28向内凹陷，在转动过程中，空气在下表面28的驱动下进行流动，以实现向外吹风。定义上表面27和下表面28之间的距离为厚度，扇叶2的厚度沿前缘边241至后缘边251方向先逐渐增大再逐渐减小，换句话说，在弦长线26方向上，该厚度自前缘边241至后缘边251方向先逐渐增大再逐渐减小，如此设置，使得在扇叶2的上下表面28之间产生较高的压力差，以提高扇叶2的送风量。
具体的，扇叶2在弦长线26方向的截面上，前缘边241至后缘边251之间存在厚度的最大值，厚度在从前缘边241测量的弦长的20％～40％长度中达到最大值，即最大厚度29，最大厚度29与该最大厚度29所对应的弦长的比值范围为1％～15％，后缘部25的厚度与弦长的比值范围为0.5％～3％，也就是说，扇叶2在弦长线26方向截面上的厚度不均等，呈两边薄、中间厚的形态，其中，扇叶2的最大厚度29靠近前缘边241设置，且扇叶2的厚度与弦长呈一定的比值关系。
扇叶2靠近叶根22一侧的厚度与弦长的比值范围为6％～20％；扇叶2靠近叶梢23一侧的厚度与弦长的比值范围为2％～10％，具体的，沿叶根22至叶梢23方向将扇叶二等分，靠近叶根22一侧的1/2扇叶2沿弦长线26方向的截面厚度与弦长的比值范围为4％～20％；靠近叶梢23一侧的1/2扇叶2沿弦长线26方向的截面厚度与弦长的比值范围为2％～10％。简而言之，将扇叶2分为等长的两段，靠近叶根22一段的厚度比靠近叶梢23一段的厚度大，使得扇叶2在保证强度和扩大送风量的同时减轻了重量。
在弦长线26的延伸方向上，定义扇叶2沿该方向的截面内多个内切圆圆心的连线为中弧线30，中弧线30与弦长线26之间的最大距离为最大弯度31，扇叶2各截面内的最大弯度31处与前缘边241之间的距离与弦长的比值范围为0.4：1～0.5：1，即最大弯度31处与前缘边241之间的距离占弦长的40％～50％，同时，扇叶2各个截面内的最大弯度31与该最大弯度31相对应的弦长的比值范围为6％～12％，也就是说，扇叶2的最大弯度31靠近叶根22设置，以增加扇叶2的送风量。
扇叶2的叶梢23还包括相互连接的第一圆弧231、直边233和第二圆弧232，直边233的两端分别与第一圆弧231和第二圆弧232连接，第一圆弧231远离直边233的一端与前缘边241连接，第二圆弧232远离直边233的一端与后缘边251连接，其中，第一圆弧231所对应的半径为25～80mm，第二圆弧232所对应的半径为2～10mm，如此设置，以控制叶梢23处气流的扰流方向，使得空气在接触第一圆弧231和第二圆弧232时能够沿第一圆弧231和第二圆弧232进行分流，进而控制叶梢23处气流的方向，同时，通过第一圆弧231和第二圆弧232控制气流的扰流方向，降低了扇叶2在转动时产生的噪音。
本实施例中，扇叶2整体的重心位于前缘部24的附近区域内，具体位于凸部242内，如此设置，使得扇叶2在旋转过程中，能够平衡扇叶2的气动力、离心力以及展开弹簧的扭力等，增强运行的稳定性。具体的，对本实施例的扇叶2与现有的扇叶进行测试，在重量方面，本实施例中的扇叶2的重量相较于现有扇叶的重量降低了约25％～40％；在送风角度方面，本实施例中的扇叶2的送风广角相较于现有扇叶的送风广角增加了约20％；在送风量方面，本实施例中的扇叶2的送风量相较于现有扇叶的送风量增加了约10％～20％。
本实施例中，扇叶2与转动盘1转动连接，通过转动盘1转动实现扇叶2的收合或展开，同时，将转动盘1与灯具组件相配合，以满足人们对不同功能的需求，提高了风扇灯100的实用性。
当然，在其他实施例中，也可以将扇叶2直接用于风扇(未图示)中，此时扇叶2上未设置安装部21和导向件211，具体的，风扇包括轮毂(未图示)和与轮毂连接的扇叶2，扇叶2的叶根22直接与轮毂呈一定角度固定连接，其中，定义扇叶2自前缘边241至后缘边251且垂直于叶根22至叶梢23方向上的连线为弦长线26，风扇转动时的平面为旋转平面32，弦长线26与旋转平面32之间的安装角β范围为21°～36°，且靠近叶梢23的安装角β范围为21°～29°，优选的，在叶根22至叶梢23的方向上将扇叶四等分，靠近叶梢23的1/4范围内的弦长线26与旋转平面32之间的安装角β范围为21°～29°，同时，将扇叶2用于风扇时，中心点20为扇叶2与轮毂的连接点，且扇叶2的叶高321变化趋势与扇叶2用于风扇灯100时相同，此处不做限制。
综上所述，本申请的扇叶2通过将前缘边241设为自叶根22朝向叶梢23呈先扩张后收缩再扩张的波浪状，使得扇叶2在转动时能够对空气进行分流，扩大了扇叶2的送风范围，同时减弱了单位面积的送风风压；通过将后缘边251设为弧形，在保证提升扇叶2性能的同 时美化扇叶2的外观；通过在叶梢23处设置第一圆弧231和第二圆弧232，实现了控制叶梢23处气流的扰流方向，同时降低了扇叶2在转动时产生的噪音。
以上实施例仅用以说明本申请的技术方案而非限制，尽管参照较佳实施例对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围。

Claims (15)

  1. 一种扇叶，其中，包括叶根(22)、叶梢(23)、连接所述叶根(22)和叶梢(23)并位于迎风一侧的前缘边(241)以及连接所述叶根(22)和叶梢(23)并位于背风一侧的后缘边(251)，所述前缘边(241)自所述叶根(22)朝向所述叶梢(23)呈波浪状设置，所述后缘边(251)呈弧形设置，并使得所述前缘边(241)和所述后缘边(251)之间的距离自所述叶根(22)朝向所述叶梢(23)先增大后减小。
  2. 根据权利要求1所述的扇叶，其中，所述前缘边(241)设有朝远离所述后缘边(251)的方向突出的凸部(242)，所述凸部(242)靠近所述叶根(22)设置，所述后缘边(251)朝远离所述前缘边(241)的方向弯曲并形成弧形。
  3. 根据权利要求2所述的扇叶，其中，定义所述叶根(22)与所述叶梢(23)之间的连线为叶长(261)，所述凸部(242)的顶点为前缘点(243)，在所述扇叶(2)的旋转方向上，所述前缘点(243)与所述后缘边(251)之间的距离大于所述前缘边(241)上任意一点与所述后缘边(251)之间的距离，定义所述前缘点(243)在所述叶长(261)上具有第一投影点，所述第一投影点与所述叶根(22)之间的距离占所述叶长(261)长度的10％～45％。
  4. 根据权利要求3所述的扇叶，其中，所述前缘边(241)设有朝向所述后缘边(251)凹陷的凹部(244)，所述凹部(244)与所述凸部(242)连接，定义所述凸部(242)与所述凹部(244)的连接点为切点(245)，所述切点(245)位于所述前缘点(243)和所述叶梢(23)之间，定义所述切点(245)在所述叶长(261)上具有第二投影点，所述第二投影点与所述叶根(22)之间的距离占所述叶长(261)长度的35％～60％。
  5. 根据权利要求3所述的扇叶，其中，所述扇叶(2)组装后，定义所述扇叶(2)转动时的最低平面为旋转平面(32)，所述前缘点(243)与所述旋转平面(32)之间的距离大于所述前缘边(241)上任意一点与所述旋转平面(32)之间的距离。
  6. 根据权利要求1所述的扇叶，其中，所述叶梢(23)包括第一圆弧(231)、直边(233)和第二圆弧(232)，所述直边(233)的两端分别与第一圆弧(231)和第二圆弧(232)连接，所述第一圆弧(231)远离所述直边(233)的一端与所述前缘边(241)连接，所述第二圆弧(232)远离所述直边(233)的一端与所述后缘边(251)连接，所述第一圆弧(231)的半径为25-80mm，所述第二圆弧(232)的半径为2-10mm。
  7. 根据权利要求1所述的扇叶，其中，在垂直于叶根(22)至叶梢(23)的方向上，定义所述前缘边(241)与所述后缘边(251)之间的连线为弦长线(26)，所述弦长线(26)的长度为弦长，在叶根(22)至叶梢(23)的方向上，所述弦长先扩大后缩小；所述扇叶(2)包括与所述叶根(22)、叶梢(23)、前缘边(241)和后缘边(251)连接的上表面(27)和下表面(28)，定义所述上表面(27)与所述下表面(28)之间的距离为厚度，所述扇叶(2)的厚度沿所述前缘边(241)至后缘边(251)方向先逐渐增大再逐渐减小。
  8. 根据权利要求7所述的扇叶，其中，所述扇叶(2)的厚度在从所述前缘边(241)测量的弦长的20％～40％长度中达到最大值，所述扇叶(2)厚度的最大值与该厚度所对应的弦长的比值范围为1％～15％，所述后缘边(251)的厚度与所述弦长的比值范围为0.5％～3％。
  9. 根据权利要求7所述的扇叶，其中，所述扇叶(2)靠近叶根(22)一侧的厚度与所述弦长的比值范围为4％～20％；所述扇叶(2)靠近叶梢(23)一侧的厚度与所述弦长的比值范围为2％～10％。
  10. 一种风扇，其中，包括轮毂以及与所述轮毂连接的如权利要求1-9中任一项所述的扇叶(2)。
  11. 根据权利要求10所述的风扇，其中，在垂直于叶根(22)至叶梢(23)的方向上，定义扇叶(2)的前缘边(241)与后缘边(251)之间的连线为弦长线(26)，所述风扇转动时的平面为旋转平面(32)，所述弦长线(26)与所述旋转平面(32)之间的夹角范围为21°～36°，且靠近所述叶梢(23)处的夹角范围为21°～29°。
  12. 一种风扇灯，其中，包括转动盘(1)以及多个如权利要求1-9中任一项所述的扇叶(2)，多个所述扇叶(2)可收合或展开地设置于所述转动盘(1)。
  13. 根据权利要求12所述的风扇灯，其中，在垂直于叶根(22)至叶梢(23)的方向上，定义扇叶(2)的前缘边(241)与后缘边(251)之间的连线为弦长线(26)，所述转动盘(1)转动时的平面为旋转平面(32)，所述弦长线(26)与所述旋转平面(32)之间的夹角范围为21°～36°，且靠近所述叶梢(23)处的夹角范围为21°～29°。
  14. 根据权利要求12所述的风扇灯，其中，所述扇叶(2)包括与所述转动盘(1)转动连接的安装部(21)，所述扇叶(2)绕所述安装部(21)相对于所述转动盘(1)收合或展开，当所述扇叶(2)展开时，所述扇叶(2)的重心与所述风扇灯(100)的旋转中心之间形成第一连线(13)，所述安装部(21)的旋转中心与所述风扇灯(100)的旋转中心之间形成第二连线(14)，所述第一连线(13)与所述第二连线(14)之间的夹角范围为0°～18°。
  15. 根据权利要求13所述的风扇灯，其中，定义所述扇叶(2)与所述转动盘(1)的连接点为中心点(20)，所述前缘边(241)与所述旋转平面(32)之间的距离为叶高(321)，所述叶高(321)自所述叶根(22)至所述叶梢(23)呈先增大后缩小，所述前缘边(241)上设有前缘点(243)，所述叶高(321)在所述前缘点(243)处达到最大值；所述前缘边(241)包括自所述前缘点(243)朝向所述叶梢(23)延伸的快速下降阶段和降低阶段，定义所述叶梢(23)与所述中心点(20)之间的连线为叶长(261)，所述快速下降阶段在所述叶长(261)上的投影为第一阶段，所述降低阶段在所述叶长(261)上的投影为第二阶段，所述第一阶段中的任意一点和所述中心点(20)之间的距离与所述叶长(261)长度的比值不大于60％，所述第二阶段中的任意一点和所述中心点(20)之间的距离与所述叶长(261)长度的比值范围为60％～100％。
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CN112525587A (zh) * 2021-02-08 2021-03-19 中国航发上海商用航空发动机制造有限责任公司 风扇叶片榫头元件级强度试验件取样方法
CN217002339U (zh) * 2022-02-09 2022-07-19 欧普照明股份有限公司 扇叶结构及风扇灯
CN114909308A (zh) * 2022-06-07 2022-08-16 欧普照明股份有限公司 风扇及风扇灯
CN218062795U (zh) * 2022-09-30 2022-12-16 欧普照明股份有限公司 扇叶、风扇及风扇灯

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