Blades, fans and fan lamps

Abstract

The application provides a blade, a fan and a fan lamp. The blade comprises a shaft part, a blade body connected to the circumferential side of the shaft part, and an outer edge of the blade body comprising a first edge and a second edge, which are oppositely arranged along the circumference of the shaft part. The first edge is an arc segment curved towards the direction away from the second edge. In the direction from the shaft part to the blade body, the second edge comprises at least one wave-shaped curve segment, the distance of which to the first edge first increases, then decreases, and then increases again. In the axial direction of the shaft part, the blade body has a first surface and a second surface, and the shaft part has an axial mounting end face. Any one of the first surface and the second surface is an arc surface curved towards the face where the axial mounting end face is located. The application reasonably sets the structure of the blade, can increase the wind speed, the wind volume and the air supply range, and can reduce the operation noise.

Description

Technical Field

[0001] This application relates to the field of fan technology, and more specifically, to a blade, a fan, and a fan light. Background Technology

[0002] A fan light is a device that combines lighting and fan functions.

[0003] In related technologies, the blade structure of the fan light is not reasonably designed. The blades are a plate structure with an inclined arrangement, which results in a small air delivery range, small air volume, poor air circulation effect, and low efficiency of the fan light when it is in fan function mode. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the first aspect of this application proposes a blade.

[0006] The second aspect of this application proposes a fan.

[0007] A third aspect of this application proposes a fan light.

[0008] In view of the above, a first aspect of this application provides a blade, comprising: a shaft portion; a blade body connected to the periphery of the shaft portion, the outer edge of the blade body including a first edge and a second edge, the first edge and the second edge being arranged opposite to each other along the circumference of the shaft portion; the first edge being an arcuate segment curved away from the second edge; along the direction from the shaft portion to the blade body, the second edge including at least one wavy curve segment, the distance from the wavy curve segment to the first edge first increasing then decreasing, and then increasing again; along the axial direction of the shaft portion, the blade body having a first surface and a second surface, the shaft portion having an axial mounting end face, either the first surface or the second surface being an arcuate surface curved away from the surface where the axial mounting end face is located; the blade body being cross-sectioned along a direction perpendicular to the shaft portion to the blade body, in a plurality of cross-sections of the blade body, the maximum length of the outline of either the first surface or the second surface being d1; the blade body being cross-sectioned along a direction perpendicular to the first edge to the second edge, in a plurality of cross-sections of the blade body, the maximum length of the outline of either the first surface or the second surface being d2; wherein, 2≤d2 / d1≤2.5.

[0009] This application provides a blade comprising a shaft and a blade body. The blade body is connected to the periphery of the shaft, that is, the blade body is located on the periphery of the shaft and is connected to the shaft. The shaft is used for connection to the fan housing, that is, the shaft is used for mounting and fixing the blade body.

[0010] The outer edge of the leaf body includes a first edge and a second edge, which are arranged opposite to each other circumferentially along the axis.

[0011] The first edge is an arc segment; specifically, the first edge curves away from the second edge.

[0012] The second edge includes at least one wavy curve segment. When there are multiple wavy curve segments, the multiple wavy curve segments are connected sequentially along the direction from the shaft to the blade body. Along the direction from the shaft to the blade body, the distance from the wavy curve segment to the first edge first increases, then decreases, and then increases again, that is, it defines the curvature shape of the second edge.

[0013] The blade body has a first surface and a second surface that are opposite each other, arranged along the axial direction of the shaft. The shaft has an axial mounting end face. After the shaft is installed with the disk body, the axial mounting end face of the shaft abuts against the disk body, and the second surface is located between the first surface and the disk body. The first surface is an arc-shaped surface that curves away from the surface where the axial mounting end face is located, and the second surface is an arc-shaped surface that curves away from the surface where the axial mounting end face is located.

[0014] By defining the shapes of the first and second edges, the blade body takes on an "eagle wing" shape. When the blade rotates, the airflow flows along the curved surface of the first edge, allowing the airflow to be smoothly guided and concentrated. This creates a relatively stable airflow layer on the blade surface, reducing airflow separation and turbulence, and thus increasing airflow velocity. The shape of the first edge causes different pressures on the airflow at different positions of the blade, resulting in pressure differences on the blade surface. These pressure differences accelerate airflow, thereby increasing wind speed. Simultaneously, the shape of the first edge increases the contact area between the blade and the airflow during rotation, allowing more airflow to be carried by the blade, thus increasing air volume. Furthermore, the different shapes of the first and second edges generate airflow in different directions during blade rotation. The first edge guides the airflow in a single direction, while the second edge generates airflow components in different directions at different positions, allowing adjustment of the airflow direction and angle, thus increasing the air delivery range and angle.

[0015] By defining the mating structure of the first and second surfaces, either the first or the second surface is an arc-shaped surface that curves away from the surface where the axial mounting end face is located. The first and the second surfaces enable the airflow to flow more smoothly on the blade surface, which helps to reduce airflow resistance, reduce frictional resistance and turbulence between the airflow and the blade, reduce energy loss, and make the airflow more concentrated, thereby improving the utilization rate of air volume.

[0016] In addition, the combination of the first edge, the second edge, the first surface, and the second surface allows the airflow to flow more smoothly over the blades, reducing the separation between the blades and the airflow, which helps to reduce turbulence. The blades are subjected to more uniform force when rotating, reducing vibration caused by uneven force, which helps to reduce operating noise and improve the product's performance and market competitiveness.

[0017] It is understandable that by taking cross-sections at different locations along a direction perpendicular to the axis from the blade body, multiple cross-sections can be obtained. In these cross-sections at different locations, the lengths of the contour lines of the first surface and the second surface are different. The maximum length of the contour line of either the first or second surface in these multiple cross-sections is denoted as d1.

[0018] It is understandable that by taking a section along the direction perpendicular to the first edge to the second edge, multiple sections can be obtained. In the sections at different locations on the blade body, the lengths of the contour lines of the first surface and the second surface are different. Taking a section along the direction perpendicular to the first edge to the second edge, the maximum length of the contour line of either the first or second surface in the multiple sections of the blade body is d2.

[0019] The relationship between d1 and d2 is defined to satisfy 2≤d2 / d1≤2.5, so that the dimensions of the blades in different directions can achieve a reasonable matching relationship. When the blades rotate, the airflow flows on the blade surface. A suitable range of d2 / d1 ratios helps the airflow to flow more efficiently on the blade surface, thereby obtaining higher airflow speeds in specific areas and increasing local wind speeds.

[0020] In addition, setting the appropriate range of d2 / d1 values ​​can make the airflow on the blade surface smoother, which helps to reduce the frequency of airflow separation, reduce flow loss, and enable the airflow to flow more stably, thereby increasing wind speed and air volume. It can also reduce the friction and collision between the airflow and the blade surface, reduce the noise caused by separation due to airflow turbulence, and at the same time, make the force on the blade more uniform in different directions, avoid resonance caused by excessive local force, and further reduce noise.

[0021] In some technical solutions, optionally, along the direction from the shaft to the blade body, the distance from either the first surface or the second surface to the surface where the axial mounting end face is located first increases and then decreases.

[0022] In this technical solution, the structures of the first and second surfaces are refined. Along the direction from the shaft to the blade body, the distance from the first surface to the surface containing the axial mounting end face first increases and then decreases, while the distance from the second surface to the surface containing the axial mounting end face first increases and then decreases. In other words, the curvature of the first and second surfaces is further refined, and along the direction from the shaft to the blade body, the height of either the first or second surface in the axial direction of the shaft exhibits a low-high-low trend. Alternatively, it can be said that along the direction from the shaft to the blade body, either the first or second surface has a structure that is low at both ends and high in the middle in the axial direction of the shaft.

[0023] The first and second surfaces work together to guide airflow towards the center of the blade. As the airflow converges, the air velocity per unit volume gradually increases, thereby increasing the overall wind speed. Furthermore, the structural design of the first and second surfaces allows the airflow to better conform to the blade shape as it flows over the blade surface, reducing airflow separation and turbulence, which further enhances wind speed. The combination of the first and second surfaces also provides greater space for airflow, allowing more air to enter the blade and participate in the flow, thus increasing air volume.

[0024] In addition, the axial height variation of the blades on the shaft causes the direction of the force exerted by the blades on the airflow to be different at different positions. This can adjust the direction of the airflow, allowing it to diffuse in a wider range to increase the air delivery range. It also makes the center of gravity distribution of the blades more reasonable, and the blades can maintain balance during rotation, which helps to improve the stability of the blade rotation and reduce the resistance and energy loss caused by blade swaying or vibration. The airflow can flow smoothly over the blades, which can reduce the collision and friction between the airflow and the blades and help to reduce the noise when the blades rotate.

[0025] In some technical solutions, the connection between the blade body and the shaft is optionally spaced apart from the axial mounting end face.

[0026] In this technical solution, the fitting structure between the blade body and the shaft is refined.

[0027] The blade body is connected to the periphery of the shaft. The connection between the blade body and the shaft is spaced apart from the axial mounting end face. That is, there is a gap between the connection between the blade body and the shaft and the axial mounting end face. This increases the axial distance between the blade body and the disk on the shaft, providing space support for changes in the shape of the blade body. This allows the blade rotation requirements to be met without changing the existing structure of the disk, which helps to reduce the overall modification cost of the fan.

[0028] In some technical solutions, optionally, along the direction from the shaft to the blade body, the distance from the first edge to the surface where the axial mounting end face is located first decreases and then increases.

[0029] In this technical solution, the structure of the first edge is refined so that the distance from the first edge to the axial mounting end face along the direction from the shaft to the blade body first decreases and then increases. The change in the distance from the first edge to the axial mounting end face is equivalent to forming a gradually narrowing opening at the first edge. When the airflow flows in through the first edge, the airflow velocity will increase, which can provide greater initial power for the blade to drive the airflow and is conducive to improving the overall wind speed.

[0030] Understandably, along the direction from the shaft to the blade body, the distance from the first edge to the surface where the axial mounting end face is located first decreases and then increases. This makes the airflow on the blade more stable. Stable airflow reduces airflow loss, allowing more airflow to continuously pass through the blade, which helps increase air volume. In addition, the shape change of the first edge can adjust the airflow direction on the blade surface. As the distance decreases, the airflow will gather and flow in a preset direction; as the distance increases, the airflow will diffuse to a wider area, allowing the airflow to cover more areas and thus expanding the air delivery range.

[0031] In some technical solutions, optionally, the tangent line passing through the connection point of the first edge and the shaft and being tangent to the first edge is the first tangent line, and the tangent line passing through the connection point of the second edge and the shaft and being tangent to the second edge is the second tangent line, and the included angle formed by the first tangent line and the second tangent line is θ; wherein, 60°≤θ≤65°.

[0032] In this technical solution, the mating structure of the first edge, the second edge, and the shaft is refined.

[0033] The tangent line passing through the connection point of the first edge and the shaft and being tangent to the first edge is called the first tangent line, and the tangent line passing through the connection point of the second edge and the shaft and being tangent to the second edge is called the second tangent line. The angle formed by the first tangent line and the second tangent line is denoted as θ, where 60° ≤ θ ≤ 65°.

[0034] By limiting the range of the angle between the first and second tangents, the airflow can be effectively guided. When the blades rotate, the airflow flows along the first and second edges. The appropriate angle formed by the first and second tangents allows the airflow to be driven more smoothly by the blades, reducing turbulence at the blade edges, which helps to increase the airflow velocity. It also concentrates the airflow in the effective working area of ​​the blades, ensuring the working area of ​​the blades, and making the airflow more concentrated towards the preset position, which helps to increase the local wind speed and enhance the blowing effect.

[0035] By limiting the range of the angle between the first tangent and the second tangent, a suitable airflow channel can be formed around the first and second edges when the blade rotates, allowing more airflow to be drawn into the blade. This increases the intake of airflow while ensuring smooth airflow, thereby increasing the air volume.

[0036] The angle between the first and second tangents affects the direction of airflow diffusion when the blades rotate. By limiting the range of the angle between the first and second tangents, the blades can generate multi-directional airflow components when rotating, thereby expanding the air supply range and covering a wider area.

[0037] By limiting the range of the angle between the first tangent and the second tangent, the airflow can flow more smoothly at the edge of the blade, reducing friction and collision between the airflow and the blade, which helps to reduce airflow noise. In addition, the airflow can better conform to the blade surface, reducing the frequency of airflow turbulence and separation, which helps to further reduce noise.

[0038] In some technical solutions, optionally, the blade body is cross-sectioned along a direction perpendicular to the first edge to the second edge. In multiple cross-sections of the blade body, the angle formed by the extension of the chord corresponding to the maximum length of the contour line of either the first surface or the second surface and the surface where the axial mounting end face is located is β; where 32°≤β≤42°.

[0039] In this technical solution, the structure of the leaf body is refined.

[0040] The blade body is cross-sectioned along a direction perpendicular to the first edge to the second edge. Among the multiple cross-sections of the blade body, the angle formed by the extension of the chord corresponding to the maximum length of the contour line of the first surface and the surface where the axial mounting end face is located is denoted as β, where 32°≤β≤42°.

[0041] The blade body is cross-sectioned along a direction perpendicular to the first edge to the second edge. Among the multiple cross-sections of the blade body, the angle formed by the extension of the chord corresponding to the maximum length of the contour line of the second surface and the surface where the axial mounting end face is located is denoted as β, where 32°≤β≤42°.

[0042] By limiting the range of the included angle β, the airflow can be accelerated when it passes over the blades. When the blades rotate, the airflow flows along the blade surface, which allows the airflow to interact with the blade surface, making the airflow more smoothly follow the blade flow, reducing the frequency of airflow separation and turbulence, and thus helping to increase wind speed.

[0043] By limiting the range of the included angle β, when the blade rotates, it can effectively draw the surrounding gas into the effective range of the blade and smoothly deliver the airflow, increasing the air volume passing through the blade per unit time, reducing the airflow resistance and energy loss during the flow process, and helping to improve the utilization efficiency of air volume.

[0044] By limiting the range of the included angle β, the airflow can be diffused in multiple directions, thereby expanding the air supply range and enabling the airflow to cover more areas, which is beneficial to improving the uniformity of air supply.

[0045] In some technical solutions, optionally, the distance between the first surface and the second surface gradually decreases along the direction from the second edge to the first edge.

[0046] In this technical solution, the mating structure of the first surface and the second surface is refined.

[0047] Along the direction from the second edge to the first edge, the distance between the first and second surfaces gradually decreases, which guides the airflow, making it more concentrated and flowing along the blade surface, reducing airflow dispersion, and improving airflow speed and concentration. Simultaneously, the cooperative structure of the first and second surfaces helps to gather more airflow within the effective working area of ​​the blade. The airflow is gradually compressed and concentrated, increasing the airflow rate through the blade per unit time, thereby increasing the air volume.

[0048] In addition, by reasonably setting the matching structure of the first and second surfaces, the air delivery angle can be optimized, so that the airflow can be delivered to different positions at a more suitable angle, which is conducive to improving the uniformity and coverage of the air delivery.

[0049] In some technical solutions, optionally, the blade body is cross-sectioned along a direction perpendicular to the shaft to the blade body. Among the multiple cross-sections of the blade body, the arc corresponding to the maximum length of the contour line of the second surface is the first reference arc. The line connecting the two endpoints of the first reference arc and the center of the first circle corresponding to the first reference arc forms an angle k1, where 30°≤k1≤55°.

[0050] In this technical solution, the structure of the leaf body is refined.

[0051] The blade body is cross-sectioned along a direction perpendicular to the axis to the blade body. Among the multiple cross-sections of the blade body, the arc corresponding to the maximum length of the contour line of the second surface is the first reference arc. The first reference arc has two endpoints, and the lines connecting the two endpoints to the center of the first circle corresponding to the first reference arc form an included angle k1. The range of values ​​for k1 is limited to satisfy: 30°≤k1≤55°.

[0052] By appropriately setting the range of values ​​for k1, the airflow velocity is increased when passing over the second surface. The shape of the first reference arc and the range of values ​​for the included angle k1 determine the flow path of the airflow on the second surface. During the airflow process, it can accelerate more smoothly along the second surface, and the contact between the airflow and the second surface is smoother, which can reduce airflow resistance and turbulence, and thus help increase wind speed.

[0053] By properly designing the shape of the second surface, more airflow can be drawn in. When the blades rotate, they create a wider and more efficient airflow inlet, making it easier for surrounding air to be drawn into the blades' working range, thereby increasing the airflow rate through the blades per unit time and improving air volume.

[0054] Furthermore, the range of the included angle k1 can affect the direction and diffusion range of the airflow blowing from the second surface. When 30°≤k1≤55°, the airflow can diffuse at a more suitable angle and in a more suitable manner, thus increasing the air delivery range.

[0055] Furthermore, by appropriately setting the range of the included angle k1, the structural strength of the blade can be guaranteed. This allows the blade to have better resistance to deformation when subjected to airflow forces and rotational centrifugal forces, resulting in a more uniform stress distribution on the blade surface. The force of the airflow on the blade surface can be transmitted more evenly, avoiding the problem of local stress concentration, ensuring the stability and reliability of blade rotation, and extending the blade's service life.

[0056] In some technical solutions, optionally, the blade has a third tangent and a fourth tangent, the third tangent being tangent to the first edge and the fourth tangent being tangent to the second edge, the third tangent and the fourth tangent intersecting, the blade body being located between the intersection of the third tangent and the fourth tangent and the shaft portion, and the intersection of the blade body and the third tangent and the fourth tangent being arranged at intervals; the included angle between the third tangent and the fourth tangent is denoted as α; wherein, 65°≤α≤80°.

[0057] In this technical solution, the structure of the blades is further refined.

[0058] The blade has a third tangent and a fourth tangent. The third tangent is tangent to the first edge. The fourth tangent is tangent to the second edge. The third and fourth tangents intersect. The blade body is located between the intersection of the third and fourth tangents and the axis, and the intersection of the blade body and the third and fourth tangents is arranged at intervals.

[0059] The angle between the third and fourth tangents is denoted as α; where 65°≤α≤80°.

[0060] The blades are subject to the force of airflow. When 65°≤α≤80°, the force of airflow on all parts of the blades is more uniform, making the blades more stable during rotation and reducing noise caused by vibration.

[0061] When 65°≤α≤80°, the natural frequency of the blade can be offset from the excitation frequency of the airflow, reducing the probability of blade resonance. Resonance will cause the vibration amplitude of the blade to increase sharply, generating strong noise. Maintaining an angle α of 65°≤α≤80° allows for adjustment of the blade's dynamic characteristics, preventing resonance and further reducing noise.

[0062] When 65°≤α≤80°, the shape of the blade can effectively suppress the formation of vortices, and the airflow can be separated more smoothly at the tail of the blade, which can reduce turbines and turbulence, reduce energy loss, and reduce noise.

[0063] In some technical solutions, optionally, the blade body is cross-sectioned along a direction perpendicular to the first edge to the second edge. Among the multiple cross-sections of the blade body, the arc corresponding to the maximum length of the contour line of the second surface is the second reference arc. The line connecting the two endpoints of the second reference arc and the center of the second circle corresponding to the second reference arc forms an angle k2, where 30°≤k2≤45°.

[0064] In this technical solution, the structure of the blades is further refined.

[0065] A cross-section is taken of the blade body along a direction perpendicular to the first edge to the second edge. Among the multiple cross-sections of the blade body, the arc corresponding to the maximum length of the contour line of the second surface is the second reference arc. The second reference arc has two endpoints, and the lines connecting the two endpoints to the center of the second circle corresponding to the second reference arc form an included angle k2. The range of values ​​for k2 is limited to satisfy: 30°≤k2≤45°.

[0066] By reasonably setting the range of k2, the airflow can be made to fit the second surface more smoothly when it flows along the second surface, reducing the friction and separation between the airflow and the blade surface, and allowing the airflow to accelerate continuously during the flow process, thereby achieving the purpose of increasing the wind speed.

[0067] By appropriately setting the range of k2, the shape of the second surface is made more conducive to drawing in more airflow. During the blade rotation, more surrounding air can be drawn into the blade's working range, thereby increasing the airflow through the blade per unit time and improving air volume.

[0068] By setting the appropriate range of k2, it is beneficial for the airflow to be transported stably inside the blade. The airflow can pass through the second surface at a relatively uniform speed, which can reduce the loss during the airflow process and improve the utilization efficiency of the air volume.

[0069] The shape of the second surface affects the direction and diffusion range of the airflow. By appropriately setting the range of k2, the airflow can diffuse at a more suitable angle and in a more suitable manner, which is beneficial for expanding the air supply range.

[0070] The second aspect of this utility model provides a fan, comprising: a disc body; and at least one blade as in the first aspect, wherein the shaft portion is detachably connected to the disc body, and a second surface is located between the first surface and the disc body.

[0071] The fan provided by this utility model includes a disc and at least one blade. Since the fan includes the blade as described in the first aspect, it has all the beneficial effects of the aforementioned blade, which will not be described in detail here.

[0072] In some technical solutions, optionally, when there are multiple blades, a mounting shaft is provided in the middle of the disk, multiple blades are located on the same side of the disk, and multiple blades are arranged circumferentially along the mounting shaft.

[0073] In this technical solution, when there are multiple blades, the multiple blades are located on the same side of the disk.

[0074] The disc body has a mounting shaft in the middle, and multiple blades are arranged circumferentially along the mounting shaft. The rotation of the disc body can drive the multiple blades to rotate, so as to ensure air volume, air velocity and air delivery distance.

[0075] In some technical solutions, optionally, the shaft is rotatably connected to the disk body, and the blade can move relative to the disk body to switch between an extended position and a retracted position; one of the disk body and the shaft is provided with a protrusion, and the other is provided with a groove, the protrusion and the groove cooperating to limit the rotation angle of the blade relative to the disk body; when the blade is in the extended position, the protrusion is inserted into the groove, and at least a portion of the blade body protrudes from the outer edge of the disk body; when the blade is in the retracted position, the protrusion is separated from the groove, and the blade is located between the mounting shaft and the outer edge of the disk body.

[0076] In this technical solution, the shaft is rotatably connected to the disc body, and the blades can move relative to the disc body to switch between an extended position and a retracted position.

[0077] One of the disc body and the shaft portion has a protrusion, and the other has a groove. Alternatively, the disc body has a protrusion, and the shaft portion has a groove.

[0078] When the blade is in the unfolded position, the protrusion is inserted into the groove. The protrusion and the groove cooperate to limit the rotation angle of the blade relative to the disk body. The blade cannot rotate relative to the disk body. The cooperation of the protrusion and the groove can restrict the blade to the unfolded position, so that at least a part of the blade body protrudes from the outer edge of the disk body.

[0079] When the blades are in the retracted position, the protrusions and grooves separate, releasing the restriction on the movement of the blades by the protrusions and grooves. The blades are stacked on one side of the disc body, and the blades are located between the mounting shaft and the outer edge of the disc body to reduce the overall size of the fan and facilitate storage.

[0080] The second aspect of this utility model provides a fan light, comprising: a fan as described in the second aspect.

[0081] The fan provided by this utility model includes the fan described in the second aspect, and therefore has all the beneficial effects of the aforementioned fan, which will not be described in detail here.

[0082] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0083] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0084] Figure 1 A first-view structural schematic diagram of a blade according to an embodiment of this application is shown;

[0085] Figure 2 This invention provides a schematic diagram of the blade from a second perspective, representing one embodiment of the blade.

[0086] Figure 3 A third-view structural schematic diagram of a blade according to an embodiment of this application is shown;

[0087] Figure 4 A schematic diagram of the first part of the blade structure according to an embodiment of this application is shown;

[0088] Figure 5 A schematic diagram of the second part of the blade structure according to an embodiment of this application is shown;

[0089] Figure 6 A fourth-view structural schematic diagram of a blade according to an embodiment of this application is shown;

[0090] Figure 7 A fifth-view structural schematic diagram of a blade according to an embodiment of this application is shown;

[0091] Figure 8 A first-view structural schematic diagram of a fan according to an embodiment of this application is shown;

[0092] Figure 9 A schematic diagram of the third part of the blade according to an embodiment of this application is shown;

[0093] Figure 10A sixth-view structural schematic diagram of a blade according to an embodiment of this application is shown;

[0094] Figure 11 A schematic diagram of the structure of a fan in the deployed position according to an embodiment of this application is shown;

[0095] Figure 12 A schematic diagram of the structure of a fan in the retracted position according to an embodiment of this application is shown;

[0096] Figure 13 A partial structural schematic diagram of the disk body according to an embodiment of this application is shown.

[0097] in, Figures 1 to 13 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0098] 1 Fan, 10 Blades, 100 Shaft, 110 Axial Mounting End Face, 112 Surface Where the Axial Mounting End Face Is Located, 200 Blade Body, 210 First Edge, 220 Second Edge, 222 Wavy Curve Segment, 230 First Surface, 240 Second Surface, 310 First Tangent, 320 Second Tangent, 330 Extension of Chord, 340 First Reference Arc, 350 Third Tangent, 360 Fourth Tangent, 370 Second Reference Arc, 380 First Center, 390 Second Center, 40 Disc, 400 Mounting Shaft, 510 Protrusion, 520 Groove. Detailed Implementation

[0099] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0100] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0101] The following reference Figures 1 to 13 The blade 10, fan 1, and fan light of some embodiments of this application are described.

[0102] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, a blade 10 according to some embodiments of this application includes a shaft portion 100 and a blade body 200.

[0103] The blade body 200 is connected to the periphery of the shaft portion 100.

[0104] The outer edge of the leaf body 200 includes a first edge 210 and a second edge 220.

[0105] The first edge 210 and the second edge 220 are arranged opposite each other circumferentially along the shaft portion 100.

[0106] The first edge 210 is an arc segment that curves away from the second edge 220.

[0107] Along the direction from the shaft portion 100 to the blade body 200, the second edge 220 includes at least one wavy curve segment 222, the distance from the wavy curve segment 222 to the first edge 210 first increases and then decreases, and then increases again.

[0108] Along the axial direction of the shaft portion 100, the blade body 200 has a first surface 230 and a second surface 240.

[0109] The shaft portion 100 has an axial mounting end face 110.

[0110] Either the first surface 230 or the second surface 240 is an arc-shaped surface that curves away from the surface 112 where the axial mounting end face is located.

[0111] The blade 10 provided in this application includes a shaft portion 100 and a blade body 200. The blade body 200 is connected to the periphery of the shaft portion 100, that is, the blade body 200 is located on the periphery of the shaft portion 100 and is connected to the shaft portion 100. The shaft portion 100 is used to connect to the disc 40 of the fan 1, that is, the shaft portion 100 is used for mounting and fixing the blade body 200.

[0112] The outer edge of the leaf body 200 includes a first edge 210 and a second edge 220, which are arranged opposite to each other along the circumference of the shaft portion 100.

[0113] The first edge 210 is an arc segment; specifically, the first edge 210 curves away from the second edge 220.

[0114] The second edge 220 includes at least one wavy curve segment 222. When there are multiple wavy curve segments 222, the multiple wavy curve segments 222 are connected sequentially along the direction from the shaft portion 100 to the blade body 200. Along the direction from the shaft portion 100 to the blade body 200, the distance from the wavy curve segment 222 to the first edge 210 first increases, then decreases, and then increases again, that is, it defines the curvature shape of the second edge 220.

[0115] The blade body 200 has a first surface 230 and a second surface 240 facing each other, which are arranged along the axial direction of the shaft portion 100. The shaft portion 100 has an axial mounting end face 110. After the shaft portion 100 is installed with the disk body 40, the axial mounting end face 110 of the shaft portion 100 abuts against the disk body 40, and the second surface 240 is located between the first surface 230 and the disk body 40. The first surface 230 is an arcuate surface curved away from the surface 112 where the axial mounting end face is located, and the second surface 240 is an arcuate surface curved away from the surface 112 where the axial mounting end face is located.

[0116] By defining the shapes of the first edge 210 and the second edge 220, the blade body 200 takes on an "eagle wing" shape. When the blade 10 rotates, the airflow flows along the curved surface of the first edge 210 as it passes over it. This allows the airflow to be smoothly guided and concentrated, forming a relatively stable airflow layer on the surface of the blade 10, reducing airflow separation and turbulence, and thus increasing airflow velocity. The shape of the first edge 210 causes different pressures on the airflow at different positions of the blade 10, resulting in corresponding changes in airflow pressure on the surface of the blade 10 and creating a pressure difference. This pressure difference accelerates the airflow, thereby increasing wind speed. Simultaneously, the shape of the first edge 210 increases the contact area between the blade 10 and the airflow during rotation, allowing more airflow to be carried by the blade 10, thereby increasing air volume. In addition, the first edge 210 and the second edge 220 have different shapes. When the blade 10 rotates, it can generate airflow in different directions. The first edge 210 is conducive to guiding the airflow in a single direction, while the second edge 220 is conducive to generating airflow components in different directions at different positions. It can adjust the direction and angle of the airflow, which is conducive to increasing the air supply range and expanding the air supply angle.

[0117] By defining the mating structure of the first surface 230 and the second surface 240, either the first surface 230 or the second surface 240 is an arc-shaped surface that curves away from the surface 112 where the axial mounting end face is located. The first surface 230 and the second surface 240 enable the airflow to flow more smoothly on the surface of the blade 10, which helps to reduce the airflow resistance, reduce the frictional resistance and turbulence between the airflow and the blade 10, reduce energy loss, and make the airflow more concentrated, thereby improving the utilization rate of air volume.

[0118] In addition, the first edge 210, the second edge 220, the first surface 230 and the second surface 240 work together to make the airflow flow more smoothly over the blade 10, reduce the separation between the blade 10 and the airflow, which helps to reduce turbulence. When the blade 10 rotates, the force is more uniform, reducing the vibration caused by uneven force, which helps to reduce operating noise, and can improve the performance and market competitiveness of the product.

[0119] In some embodiments, exemplarily, along the direction from the shaft portion 100 to the blade body 200, the distance from either the first surface 230 or the second surface 240 to the surface 112 where the axial mounting end face is located first increases and then decreases.

[0120] In this embodiment, the structures of the first surface 230 and the second surface 240 are refined. Along the direction from the shaft portion 100 to the blade body 200, the distance from the first surface 230 to the surface 112 containing the axial mounting end face first increases and then decreases, and the distance from the second surface 240 to the surface 112 containing the axial mounting end face first increases and then decreases. That is, the curvature of the first surface 230 and the second surface 240 is further refined, and along the direction from the shaft portion 100 to the blade body 200, the height of either the first surface 230 or the second surface 240 in the axial direction of the shaft portion 100 exhibits a low-high-low variation trend. Alternatively, it can be said that along the direction from the shaft portion 100 to the blade body 200, either the first surface 230 or the second surface 240 has a structure that is low at both ends and high in the middle in the axial direction of the shaft portion 100.

[0121] The first surface 230 and the second surface 240 work together to guide airflow toward the center of the blade 10. As the airflow converges, the airflow velocity per unit volume gradually increases, thereby increasing the overall wind speed. Furthermore, the structural design of the first surface 230 and the second surface 240 allows the airflow to better conform to the shape of the blade 10 when flowing on its surface, reducing airflow separation and turbulence, which further enhances wind speed. The combination of the first surface 230 and the second surface 240 also provides greater space for the airflow, allowing more airflow to enter the blade 10 and participate in the flow, thus increasing air volume.

[0122] In addition, the height variation of the blade 10 along the axial direction of the shaft 100 causes the direction of the force exerted by the blade 10 on the airflow to be different at different positions. This can adjust the direction of the airflow, allowing the airflow to diffuse in a wider range to increase the air delivery range. It can also make the center of gravity distribution of the blade 10 more reasonable, and the blade 10 can maintain balance during rotation. This is beneficial to improving the stability of the blade 10 rotation, reducing the resistance and energy loss caused by the swaying or vibration of the blade 10, and allowing the airflow to flow smoothly over the blade 10. This can reduce the collision and friction between the airflow and the blade 10, and help reduce the noise when the blade 10 rotates.

[0123] In some embodiments, exemplarily, such as Figure 5 As shown, the connection between the blade body 200 and the shaft portion 100 is spaced apart from the axial mounting end face 110.

[0124] In this embodiment, the mating structure between the blade body 200 and the shaft portion 100 is refined.

[0125] The blade body 200 is connected to the periphery of the shaft portion 100. The connection between the blade body 200 and the shaft portion 100 is spaced apart from the axial mounting end face 110. That is, there is a gap between the connection between the blade body 200 and the shaft portion 100 and the axial mounting end face 110. This can increase the axial distance between the blade body 200 and the disk 40 on the shaft portion 100, providing space support for changes in the shape of the blade body 200. This allows the rotation requirements of the blade 10 to be met without changing the existing structure of the disk 40, which helps to reduce the overall modification cost of the fan 1.

[0126] In some technical solutions, optionally, along the direction from the shaft portion 100 to the blade body 200, the distance from the first edge 210 to the surface 112 where the axial mounting end face is located first decreases and then increases.

[0127] In some embodiments, exemplarily, such as Figure 5 As shown, along the direction from the shaft portion 100 to the blade body 200, the distance from the first edge 210 to the surface 112 where the axial mounting end face is located first decreases and then increases.

[0128] In this embodiment, the structure of the first edge 210 is refined such that the distance from the first edge 210 to the surface 112 where the axial mounting end face is located first decreases and then increases along the direction from the shaft portion 100 to the blade body 200. The change in the distance from the first edge 210 to the surface 112 where the axial mounting end face is located is equivalent to forming a gradually narrowing opening at the first edge 210. When the airflow flows in through the first edge 210, the airflow velocity will increase, which can provide greater initial power for the blade 10 to drive the airflow, which is beneficial to improving the overall wind speed.

[0129] Understandably, along the direction from the shaft portion 100 to the blade body 200, the distance from the first edge 210 to the surface 112 where the axial mounting end face is located first decreases and then increases. This makes the airflow on the blade 10 more stable. Stable airflow reduces airflow loss, allowing more airflow to continuously pass through the blade 10, which helps increase air volume. In addition, the shape change of the first edge 210 can adjust the airflow direction on the surface of the blade 10. As the distance decreases, the airflow will gather and flow in a preset direction. As the distance increases, the airflow will diffuse to a wider area, allowing the airflow to cover more areas and thus expanding the air delivery range.

[0130] In some embodiments, exemplarily, such as Figure 6 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the axis 100 to the blade body 200. Among the multiple cross-sections of the blade body 200, the maximum length of the outline of either the first surface 230 or the second surface 240 is d1.

[0131] like Figure 6 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the first edge 210 to the second edge 220. Among the multiple cross-sections of the blade body 200, the maximum length of the outline of either the first surface 230 or the second surface 240 is d2.

[0132] Where 2≤d2 / d1≤2.5.

[0133] In this embodiment, the structure of the leaf body 200 is refined.

[0134] It is understandable that multiple cross-sections can be obtained by taking cross-sections at different locations along a direction perpendicular to the axis 100 to the blade body 200. In these cross-sections at different locations of the blade body 200, the lengths of the contour lines of the first surface 230 and the second surface 240 are different. The maximum length of the contour line of either the first surface 230 or the second surface 240 in these multiple cross-sections is denoted as d1.

[0135] It is understandable that by taking a section of the blade body 200 along a direction perpendicular to the first edge 210 to the second edge 220, multiple sections can be obtained. In the sections at different locations of the blade body 200, the lengths of the contour lines of the first surface 230 and the second surface 240 are different. When taking a section of the blade body 200 along a direction perpendicular to the first edge 210 to the second edge 220, the maximum length of the contour line of either the first surface 230 or the second surface 240 in the multiple sections of the blade body 200 is d2.

[0136] The relationship between d1 and d2 is defined to satisfy 2≤d2 / d1≤2.5, so that the dimensions of the blade 10 in different directions can achieve a reasonable matching relationship. When the blade 10 rotates, the airflow flows on the surface of the blade 10. The appropriate range of d2 / d1 ratio helps the airflow to flow more efficiently on the surface of the blade 10, thereby obtaining a higher airflow speed in a specific area and improving the local wind speed.

[0137] In addition, setting the appropriate range of d2 / d1 values ​​can make the airflow on the surface of blade 10 smoother, which helps to reduce the frequency of airflow separation, reduce flow loss, and make the airflow more stable, thereby increasing wind speed and air volume. It can also reduce the friction and collision between the airflow and the surface of blade 10, reduce the noise caused by separation due to airflow turbulence, and at the same time, make the force on blade 10 more uniform in different directions, avoid resonance caused by excessive local force, and further reduce noise.

[0138] Examples include d2 / d1 = 2.1, d2 / d1 = 2.2, d2 / d1 = 2.3, and d2 / d1 = 2.4, etc., which will not be listed here.

[0139] In some embodiments, exemplarily, such as Figure 7 As shown, the tangent line that passes through the connection point of the first edge 210 and the shaft portion 100 and is tangent to the first edge 210 is the first tangent line 310.

[0140] The tangent line passing through the connection point of the second edge 220 and the shaft portion 100 and being tangent to the second edge 220 is the second tangent line 320.

[0141] The angle formed by the first tangent 310 and the second tangent 320 is θ.

[0142] Where 60°≤θ≤65°.

[0143] In this embodiment, the mating structure of the first edge 210, the second edge 220, and the shaft portion 100 is refined.

[0144] The tangent line passing through the connection point of the first edge 210 and the shaft portion 100 and tangent to the first edge 210 is the first tangent line 310. The tangent line passing through the connection point of the second edge 220 and the shaft portion 100 and tangent to the second edge 220 is the second tangent line 320. The included angle formed by the first tangent line 310 and the second tangent line 320 is denoted as θ, where 60°≤θ≤65°.

[0145] By limiting the range of the angle between the first tangent 310 and the second tangent 320, the airflow can be effectively guided. When the blade 10 rotates, the airflow flows along the first edge 210 and the second edge 220. The appropriate angle formed by the first tangent 310 and the second tangent 320 allows the airflow to be driven more smoothly by the blade 10, reducing turbulence at the edge of the blade 10, which is beneficial to increasing the airflow velocity. It can also concentrate the airflow in the effective working area of ​​the blade 10, ensuring the working area of ​​the blade 10, and making the airflow more concentrated towards the preset position, which is beneficial to increasing the local wind speed and enhancing the blowing effect.

[0146] By limiting the range of the angle between the first tangent 310 and the second tangent 320, a suitable airflow channel can be formed around the first edge 210 and the second edge 220 when the blade 10 rotates, so that more airflow can be drawn into the blade 10. This increases the amount of airflow drawn in while ensuring smooth airflow, thereby increasing the air volume.

[0147] The angle formed by the first tangent 310 and the second tangent 320 affects the diffusion direction of the airflow when the blade 10 rotates. By limiting the range of the angle between the first tangent 310 and the second tangent 320, the blade 10 can generate multi-directional airflow components when rotating, thereby expanding the air supply range and covering a wider area.

[0148] By limiting the range of the angle between the first tangent 310 and the second tangent 320, the airflow can flow more smoothly at the edge of the blade 10, reducing friction and collision between the airflow and the blade 10, which helps to reduce airflow noise. In addition, the airflow can better conform to the surface of the blade 10, reducing the frequency of airflow turbulence and separation, which helps to further reduce noise.

[0149] Examples include θ = 61°, θ = 62°, θ = 63°, and θ = 64°, etc., which will not be listed here.

[0150] In some embodiments, exemplarily, such as Figure 8 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the first edge 210 to the second edge 220.

[0151] In multiple cross sections of the blade body 200, the extension line 330 of the chord corresponding to the maximum length of the contour line of either the first surface 230 or the second surface 240 forms an angle β with the surface 112 where the axial mounting end face is located.

[0152] Where 32°≤β≤42°.

[0153] In this embodiment, the structure of the leaf body 200 is refined.

[0154] The blade body 200 is cross-sectioned along the direction perpendicular to the first edge 210 to the second edge 220. Among the multiple cross-sections of the blade body 200, the angle formed by the extension line 330 of the chord corresponding to the maximum length of the contour line of the first surface 230 and the surface 112 where the axial mounting end face is located is denoted as β, where 32°≤β≤42°.

[0155] The blade body 200 is cross-sectioned along the direction perpendicular to the first edge 210 to the second edge 220. Among the multiple cross-sections of the blade body 200, the angle formed by the extension line 330 of the chord corresponding to the maximum length of the contour line of the second surface 240 and the surface 112 where the axial mounting end face is located is denoted as β, where 32°≤β≤42°.

[0156] By limiting the range of the included angle β, the airflow can be accelerated when it passes over the blade 10. When the blade 10 rotates, the airflow flows along the surface of the blade 10, which allows the airflow to interact with the surface of the blade 10, making the airflow flow more smoothly along the blade 10, reducing the frequency of airflow separation and turbulence, and thus helping to increase wind speed.

[0157] By limiting the range of the included angle β, when the blade 10 rotates, it can effectively draw the surrounding gas into the effective range of the blade 10 and smoothly deliver the airflow, increasing the air volume passing through the blade 10 per unit time, reducing the resistance and energy loss of the airflow during the flow process, and helping to improve the utilization efficiency of the air volume.

[0158] By limiting the range of the included angle β, the airflow can be diffused in multiple directions, thereby expanding the air supply range and enabling the airflow to cover more areas, which is beneficial to improving the uniformity of air supply.

[0159] Examples include β = 33°, β = 34°, β = 35°, β = 36°, β = 37°, β = 38°, β = 39°, β = 40°, and β = 41°, etc., which will not be listed here one by one.

[0160] In some embodiments, exemplarily, such as Figure 9 As shown, the distance between the first surface 230 and the second surface 240 gradually decreases along the direction from the second edge 220 to the first edge 210.

[0161] In this embodiment, the mating structure of the first surface 230 and the second surface 240 is refined.

[0162] Along the direction from the second edge 220 to the first edge 210, the distance between the first surface 230 and the second surface 240 gradually decreases, which can guide the airflow, making the airflow more concentrated along the surface of the blade 10, reducing airflow dispersion, and helping to increase the airflow speed and concentration. At the same time, the cooperative structure of the first surface 230 and the second surface 240 helps to gather more airflow in the effective working area of ​​the blade 10. The airflow is gradually compressed and concentrated, increasing the airflow rate through the blade 10 per unit time, thereby increasing the air volume.

[0163] In addition, by reasonably setting the matching structure of the first surface 230 and the second surface 240, the air delivery angle can be optimized, so that the airflow can be delivered to different positions at a more suitable angle, which is conducive to improving the uniformity and coverage of the air delivery.

[0164] In some embodiments, exemplarily, such as Figure 9 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the axis 100 to the blade body 200.

[0165] Among the multiple cross sections of the blade body 200, the arc corresponding to the maximum length of the contour line of the second surface 240 is the first reference arc 340.

[0166] The lines connecting the two endpoints of the first reference arc 340 to the center 380 of the corresponding first circle form an angle k1, where 30°≤k1≤55°.

[0167] In this embodiment, the structure of the leaf body 200 is refined.

[0168] A cross-section is taken of the blade body 200 along a direction perpendicular to the axis 100 to the blade body 200. Among the multiple cross-sections of the blade body 200, the arc corresponding to the maximum length of the contour line of the second surface 240 is the first reference arc 340. The first reference arc 340 has two endpoints, and the lines connecting the two endpoints to the first center 380 corresponding to the first reference arc 340 form an included angle k1, and the range of values ​​for k1 is limited to satisfy: 30°≤k1≤55°.

[0169] By appropriately setting the range of values ​​for k1, the airflow velocity is increased when passing over the second surface 240. The shape of the first reference arc 340 and the range of values ​​for the included angle k1 determine the flow path of the airflow on the second surface 240. During the airflow process, it can accelerate more smoothly along the second surface 240, and the contact between the airflow and the second surface 240 is smoother, which can reduce airflow resistance and turbulence, and thus help increase wind speed.

[0170] By rationally setting the shape of the second surface 240, more airflow can be drawn in. When the blade 10 rotates, it can form a wider and more reasonable airflow inlet, making it easier for the surrounding air to be drawn into the working range of the blade 10, thereby increasing the airflow through the blade 10 per unit time and improving the air volume.

[0171] Furthermore, the range of the included angle k1 can affect the direction and diffusion range of the airflow blowing out from the second surface 240. When 30°≤k1≤55°, the airflow can diffuse at a more suitable angle and in a more suitable manner, thereby increasing the air delivery range.

[0172] Furthermore, by reasonably setting the range of the included angle k1, the structural strength of the blade 10 can be guaranteed, enabling it to have better resistance to deformation when subjected to airflow forces and rotational centrifugal forces, and making the stress distribution on the surface of the blade 10 more uniform. The force of the airflow on the surface of the blade 10 can be transmitted more evenly, avoiding the problem of local stress concentration, ensuring the stability and reliability of the blade 10's rotation, and extending the service life of the blade 10.

[0173] For example, k1 = 35°, k1 = 39°, k1 = 40°, k1 = 42°, k1 = 45°, k1 = 48°, k1 = 50° and k1 = 52°, etc., which will not be listed here one by one.

[0174] In some embodiments, exemplarily, such as Figure 10 As shown, the blade 10 has a third tangent 350 and a fourth tangent 360.

[0175] The third tangent line 350 is tangent to the first edge 210.

[0176] The fourth tangent 360 is tangent to the second edge 220.

[0177] The third tangent line 350° and the fourth tangent line 360° intersect.

[0178] The blade body 200 is located between the intersection of the third tangent 350 and the fourth tangent 360 and the shaft portion 100, and the blade body 200 is arranged at intervals with the intersection of the third tangent 350 and the fourth tangent 360.

[0179] The angle between the third tangent line 35° and the fourth tangent line 36° is denoted as α.

[0180] Where 65°≤α≤80°.

[0181] In this embodiment, the structure of the blade 10 is further refined.

[0182] The blade 10 has a third tangent 350 and a fourth tangent 360. The third tangent 350 is tangent to the first edge 210. The fourth tangent 360 is tangent to the second edge 220. The third tangent 350 and the fourth tangent 360 intersect. The blade body 200 is located between the intersection of the third tangent 350 and the fourth tangent 360 and the shaft portion 100, and the blade body 200 is arranged at intervals with the intersection of the third tangent 350 and the fourth tangent 360.

[0183] The angle between the third tangent 35° and the fourth tangent 36° is denoted as α; where 65°≤α≤80°.

[0184] The blade 10 is subjected to the force of airflow. When 65°≤α≤80°, the force of airflow on various parts of the blade 10 is more uniform, making the blade 10 more stable during rotation and reducing the noise caused by vibration.

[0185] When 65°≤α≤80°, the natural frequency of blade 10 can be offset from the airflow excitation frequency, reducing the probability of resonance in blade 10. Resonance will cause the vibration amplitude of blade 10 to increase sharply, generating strong noise. Angle α satisfying 65°≤α≤80° can adjust the dynamic characteristics of blade 10, avoiding resonance and thus further reducing noise.

[0186] When 65°≤α≤80°, the shape of blade 10 can effectively suppress the formation of vortices, and the airflow can be separated more smoothly at the tail of blade 10, which can reduce turbine and turbulence, reduce energy loss, and reduce noise.

[0187] Examples include α = 68°, α = 70°, α = 72°, α = 75°, and α = 78°, etc., which will not be listed here one by one.

[0188] In some embodiments, exemplarily, such as Figure 4 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the first edge 210 to the second edge 220.

[0189] Among the multiple cross sections of the blade body 200, the arc corresponding to the maximum length of the contour line of the second surface 240 is the second reference arc 370.

[0190] The lines connecting the two endpoints of the second reference arc 370 to the second center 390 corresponding to the second reference arc 370 form an angle k2.

[0191] 30°≤k2≤45°.

[0192] In this embodiment, the structure of the blade 10 is further refined.

[0193] A cross-section is taken of the blade body 200 along a direction perpendicular to the first edge 210 to the second edge 220. Among the multiple cross-sections of the blade body 200, the arc corresponding to the maximum length of the contour line of the second surface 240 is the second reference arc 370. The second reference arc 370 has two endpoints, and the lines connecting the two endpoints to the second center 390 corresponding to the second reference arc 370 form an included angle k2, and the range of values ​​for k2 is limited to satisfy: 30°≤k2≤45°.

[0194] By reasonably setting the range of values ​​for k2, the airflow can be made to fit more smoothly against the second surface 240 when it flows along the second surface 240, reducing the friction and separation between the airflow and the surface of the blade 10, and allowing the airflow to accelerate continuously during the flow process, thereby achieving the purpose of increasing the wind speed.

[0195] By appropriately setting the range of values ​​for k2, the shape of the second surface 240 is made more conducive to drawing in more airflow. During the rotation of the blade 10, more surrounding air can be drawn into the working range of the blade 10, thereby increasing the airflow rate through the blade 10 per unit time and improving air volume.

[0196] By setting the value range of k2 appropriately, it is beneficial for the airflow to be stably transported inside the blade 10. The airflow can pass through the second surface 240 at a relatively uniform speed, which can reduce the loss during the airflow process and improve the utilization efficiency of the air volume.

[0197] The shape of the second surface 240 affects the direction and diffusion range of the airflow blowing out from the second surface 240. By reasonably setting the range of values ​​for k2, the airflow can diffuse at a more suitable angle and in a more appropriate manner, which is beneficial to expanding the air supply range.

[0198] like Figure 8 , Figure 11 and Figure 12 As shown, a fan 1 according to some embodiments of the present application includes: a disc body 40; and at least one blade 10 of any of the above embodiments.

[0199] The shaft 100 and the disc 40 are detachably connected.

[0200] The second surface 240 is located between the first surface 230 and the disk body 40.

[0201] The fan 1 provided in this application includes a disc body 40 and at least one blade 10. Since the fan 1 includes the blade 10 as described in the first aspect, it has all the beneficial effects of the blade 10, which will not be described in detail here.

[0202] In some embodiments, exemplarily, when there are multiple blades 10, a mounting shaft 400 is provided in the middle of the disc body 40, and multiple blades 10 are located on the same side of the disc body 40.

[0203] Multiple blades 10 are arranged circumferentially along the mounting shaft 400.

[0204] In this embodiment, when there are multiple blades 10, the multiple blades 10 are located on the same side of the disk 40.

[0205] A mounting shaft 400 is provided in the middle of the disc body 40, and multiple blades 10 are arranged circumferentially along the mounting shaft 400. The rotation of the disc body 40 can drive the multiple blades 10 to rotate, so as to ensure air volume, air velocity and air delivery distance.

[0206] In some embodiments, the shaft 100 is rotatably connected to the disc body 40.

[0207] The blade 10 can move relative to the disc 40.

[0208] like Figure 2 and Figure 13As shown, one of the disc body 40 and the shaft portion 100 is provided with a protrusion 510 and the other is provided with a groove 520. The protrusion 510 and the groove 520 cooperate to limit the rotation angle of the blade 10 relative to the disc body 40.

[0209] When the blade 10 is in the unfolded position, the protrusion 510 is inserted into the groove 520, and at least a portion of the blade body 200 protrudes from the outer edge of the disc 40.

[0210] When the blade 10 is in the retracted position, the protrusion 510 separates from the groove 520, and the blade 10 is located between the outer edge of the mounting shaft 400 and the disc body 40.

[0211] In this embodiment, the shaft 100 is rotatably connected to the disc 40, and the blade 10 can move relative to the disc 40 to switch between an extended position and a retracted position.

[0212] One of the disc body 40 and the shaft portion 100 is provided with a protrusion 510, and the other is provided with a groove 520. The disc body 40 is provided with a protrusion 510, and the shaft portion 100 is provided with a groove 520. Alternatively, the disc body 40 is provided with a groove 520, and the shaft portion 100 is provided with a protrusion 510.

[0213] When the blade 10 is in the unfolded position, the protrusion 510 is inserted into the groove 520. The protrusion 510 and the groove 520 cooperate to limit the rotation angle of the blade 10 relative to the disk body 40. The blade 10 cannot rotate relative to the disk body 40. The cooperation of the protrusion 510 and the groove 520 can limit the blade 10 to the unfolded position, so that at least a portion of the blade body 200 protrudes from the outer edge of the disk body 40.

[0214] When the blade 10 is in the retracted position, the protrusion 510 separates from the groove 520, releasing the restriction on the movement of the blade 10 by the protrusion 510 and the groove 520. The blade 10 is stacked on one side of the disc 40, and the blade 10 is located between the mounting shaft 400 and the outer edge of the disc 40, so as to reduce the overall size of the fan 1 and facilitate storage.

[0215] A fan light according to some embodiments of the present application includes: a fan 1 as described in any of the above embodiments.

[0216] The fan light provided in this application includes the fan 1 as described in the above embodiment, and therefore has all the beneficial effects of the fan 1 described above, which will not be described one by one here.

[0217] This application has a reasonable structure for the blades 10, which can increase the output air volume and the air delivery range while ensuring noise reduction, with the maximum average wind speed reaching 3.3m / s.

[0218] For example, the blade 10 includes a shaft portion 100 and a blade body 200. The shaft portion 100 is the rotation axis for the blade 10 to unfold and retract. The blade 10 is a key component of the fan 1, providing structural support for the performance parameters of the fan 1 and capable of cutting air to provide mechanical performance. The structure of the blade body 200 on the side opposite to the shaft portion 100 enables it to provide kinetic energy for a wide range of air delivery, expanding the air delivery range and increasing the air volume.

[0219] For example, the blade body 200 of the blade 10 is shaped like an "eagle wing," which is more in line with the principles of dynamics and helps to reduce noise and improve work efficiency.

[0220] For example, the shaft portion 100 of the blade 10 is provided with a protrusion 510 and the disc body 40 is provided with a groove 520. The groove 520 and the protrusion 510 cooperate to fix the unfolding angle of the blade 10.

[0221] Exemplarily, the outer edge of the blade body 200 includes a first edge 210 and a second edge 220, which are arranged opposite to each other circumferentially along the shaft portion 100. The first edge 210 is an arc segment curved away from the second edge 220. Along the direction from the shaft portion 100 to the blade body 200, the second edge 220 includes at least one wavy curve segment 222, the distance from the wavy curve segment 222 to the first edge 210 first increases, then decreases, and then increases again. Along the axial direction of the shaft portion 100, the blade body 200 has a first surface 230 and a second surface 240, either the first surface 230 or the second surface 240 being arranged in an "inward arc" shape, that is, either the first surface 230 or the second surface 240 being arranged in an "inward concave" shape in the axial height of the shaft portion 100 from the shaft portion 100 to the blade body 200, and the height of either the first surface 230 or the second surface 240 exhibiting a "low-high-low" variation trend. This maximizes the chord length and shear surface area, which helps increase wind speed and air volume.

[0222] For example, the blade body 200 is cross-sectioned along a direction perpendicular to the first edge 210 to the second edge 220. Among the multiple cross-sections of the blade body 200, the arc corresponding to the maximum length of the outline of the second surface 240 is the second reference arc 370. The line connecting the two endpoints of the second reference arc 370 and the second center 390 corresponding to the second reference arc 370 forms an angle k2, where 30°≤k2≤45°. Optionally, 35°≤k2≤40°.

[0223] For example, such as Figure 5As shown, along the direction from the shaft portion 100 to the blade body 200, the distance from the first edge 210 to the surface 112 where the axial mounting end face is located first decreases and then increases. That is, the first edge 210 is set to gradually become concave outward in the axial direction of the shaft portion 100, and the height of the first edge 210 has a "high-low-high" changing trend.

[0224] For example, such as Figure 6 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the shaft portion 100 to the blade body 200. Among the multiple cross-sections of the blade body 200, the maximum length of the outline of either the first surface 230 or the second surface 240 is d1. The blade body 200 is cross-sectioned along a direction perpendicular to the first edge 210 to the second edge 220. Among the multiple cross-sections of the blade body 200, the maximum length of the outline of either the first surface 230 or the second surface 240 is d2. Wherein, 2≤d2 / d1≤2.5.

[0225] For example, such as Figure 7 As shown, the tangent line passing through the connection point of the first edge 210 and the shaft portion 100 and being tangent to the first edge 210 is the first tangent line 310, and the tangent line passing through the connection point of the second edge 220 and the shaft portion 100 and being tangent to the second edge 220 is the second tangent line 320. The included angle formed by the first tangent line 310 and the second tangent line 320 is θ; where 60°≤θ≤65°.

[0226] For example, such as Figure 8 As shown, the blade body 200 is cross-sectioned along the direction perpendicular to the first edge 210 to the second edge 220. In the multiple cross-sections of the blade body 200, the extension line 330 of the chord corresponding to the maximum length of the contour line of either the first surface 230 or the second surface 240 forms an angle β with the surface 112 where the axial mounting end face is located; where 32°≤β≤42°.

[0227] For example, such as Figure 9 As shown, the blade body 200 is cross-sectioned along a direction perpendicular to the shaft portion 100 to the blade body 200. Among the multiple cross-sections of the blade body 200, the arc corresponding to the maximum length of the outline of the second surface 240 is the first reference arc 340. The line connecting the two endpoints of the first reference arc 340 and the first center 380 corresponding to the first reference arc 340 forms an angle k1, where 30°≤k1≤55°, and optionally, 35°≤k1≤50°.

[0228] For example, a leaf tail is formed on the side of the leaf body 200 away from the shaft portion 100, and the surface of the leaf tail is concave downward.

[0229] For example, the blade 10 has a third tangent 350 and a fourth tangent 360. The third tangent 350 is tangent to the first edge 210, and the fourth tangent 360 is tangent to the second edge 220. The third tangent 350 and the fourth tangent 360 intersect. The blade body 200 is located between the intersection of the third tangent 350 and the fourth tangent 360 and the shaft portion 100, and the intersection of the blade body 200 and the third tangent 350 and the fourth tangent 360 is arranged at intervals. The included angle between the third tangent 350 and the fourth tangent 360 is denoted as α. Wherein, 65°≤α≤80°.

[0230] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0231] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A blade, characterized in that, include: Shaft portion; The leaf body is connected to the periphery of the shaft portion. The outer edge of the leaf body includes a first edge and a second edge, which are arranged opposite to each other along the circumference of the shaft portion. The first edge is an arc segment that curves away from the second edge; Along the direction from the shaft to the blade body, the second edge includes at least one wavy curve segment, the distance of which from the wavy curve segment to the first edge first increases, then decreases, and then increases again; Along the axial direction of the shaft portion, the blade body has a first surface and a second surface, the shaft portion has an axial mounting end face, and either the first surface or the second surface is an arcuate surface curved toward the surface opposite to the axial mounting end face; The blade body is cross-sectioned along a direction perpendicular to the axis to the blade body, and in a plurality of cross-sections of the blade body, the maximum length of the outline of either the first surface or the second surface is d1. The leaf body is cross-sectioned along a direction perpendicular to the first edge to the second edge, and in a plurality of cross-sections of the leaf body, the maximum length of the outline of either the first surface or the second surface is d2. Where 2≤d2 / d1≤2.

5.

2. The blade according to claim 1, characterized in that, Along the direction from the shaft to the blade body, the distance from either the first surface or the second surface to the surface containing the axial mounting end face first increases and then decreases; and / or Along the direction from the shaft to the blade body, the distance from the first edge to the surface where the axial mounting end face is located first decreases and then increases.

3. The blade according to claim 1 or 2, characterized in that, The connection between the blade body and the shaft is spaced apart from the axial mounting end face.

4. The blade according to claim 1 or 2, characterized in that, The tangent line passing through the connection point of the first edge and the shaft and being tangent to the first edge is the first tangent line; the tangent line passing through the connection point of the second edge and the shaft and being tangent to the second edge is the second tangent line; the angle formed by the first tangent line and the second tangent line is θ. Where 60°≤θ≤65°.

5. The blade according to claim 1 or 2, characterized in that, The blade body is cross-sectioned along a direction perpendicular to the first edge to the second edge. In a plurality of cross-sections of the blade body, the angle between the extension of the chord corresponding to the maximum length of the contour line of either the first surface or the second surface and the surface where the axial mounting end face is located is β. Where 32°≤β≤42°.

6. The blade according to claim 1 or 2, characterized in that, Along the direction from the second edge to the first edge, the distance between the first surface and the second surface gradually decreases.

7. The blade according to claim 6, characterized in that, The blade body is cross-sectioned along a direction perpendicular to the axis to the blade body. Among the multiple cross-sections of the blade body, the arc corresponding to the maximum length of the contour line of the second surface is the first reference arc. The line connecting the two endpoints of the first reference arc and the center of the first circle corresponding to the first reference arc forms an angle k1, where 30°≤k1≤55°.

8. The blade according to claim 1 or 2, characterized in that, The blade has a third tangent and a fourth tangent. The third tangent is tangent to the first edge, and the fourth tangent is tangent to the second edge. The third tangent and the fourth tangent intersect. The blade body is located between the intersection of the third tangent and the fourth tangent and the shaft portion, and the intersection of the blade body and the third tangent and the fourth tangent are arranged at intervals. The angle between the third tangent and the fourth tangent is denoted as α; Where 65°≤α≤80°.

9. The blade according to claim 1 or 2, characterized in that, The blade body is cross-sectioned along a direction perpendicular to the first edge to the second edge. Among the multiple cross-sections of the blade body, the arc corresponding to the maximum length of the contour line of the second surface is the second reference arc. The line connecting the two endpoints of the second reference arc and the center of the second circle corresponding to the second reference arc forms an angle k2, where 30°≤k2≤45°.

10. A fan, characterized in that, include: Disk body; and At least one blade as described in any one of claims 1 to 9, wherein the shaft portion is detachably connected to the disk body, and the second surface is located between the first surface and the disk body; When there are multiple blades, a mounting shaft is provided in the middle of the disk body, and multiple blades are located on the same side of the disk body, with multiple blades arranged circumferentially at intervals along the mounting shaft.

11. The fan according to claim 10, characterized in that, The shaft is rotatably connected to the disc body, and the blades are able to move relative to the disc body to switch between an extended position and a retracted position. One of the disk body and the shaft portion is provided with a protrusion, and the other is provided with a groove. The protrusion and the groove cooperate to limit the rotation angle of the blade relative to the disk body. When the blade is in the unfolded position, the protrusion is inserted into the groove, and at least a portion of the blade body protrudes from the outer edge of the disc body; When the blade is in the retracted position, the protrusion separates from the groove, and the blade is located between the mounting shaft and the outer edge of the disc.

12. A fan light, characterized in that, include: The fan as described in claim 10 or 11.

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