Fan module

Abstract

The present application discloses a fan module, comprising: a fan housing, the fan housing being provided with an air inlet structure and an air outlet corresponding to the air inlet structure; a fan assembly, the fan assembly being disposed in the fan housing and used for pushing an airflow from the air inlet structure to the air outlet; and a wind increasing ring, the wind increasing ring being connected to the fan housing, and the wind increasing ring annularly covering the air outlet. Under the action of atmospheric pressure, the airflow behind the wind increasing ring flows into the wind increasing ring and is driven by the airflow flowing out of the air outlet to flow, thereby enhancing the wind force of a fan, increasing the wind output amount of the fan, and improving the wind output efficiency of the fan.

Description

fan module

[0001] This application claims priority to Chinese patent applications No. 2023231539874, 2023231516976, 2024206210445, 2024206220733, 202421110447X, 2024212007316, and 2024212016014, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of fans, and in particular to a fan module. Background Art

[0003] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0004] A fan in the prior art comprises a housing and a fan assembly, with the housing being provided with an air inlet and an air outlet. The fan assembly rotates to push external air from the air inlet to the air outlet, thereby creating a blowing effect. The applicant of the present invention discovered during research that fans in the prior art can only push the airflow through the fan, but cannot drive the external air to flow in a directional manner, resulting in low air discharge efficiency.

[0005] Application Contents

[0006] The purpose of this application is to provide a fan module that can drive external air to move in a directional manner, thereby improving the fan's air outlet efficiency.

[0007] An embodiment of the present application provides a fan module, comprising:

[0008] A fan housing, wherein the fan housing is provided with an air inlet structure and an air outlet corresponding to the air inlet structure;

[0009] a fan assembly, the fan assembly being disposed in the fan housing and configured to push airflow from the air inlet structure toward the air outlet;

[0010] An air-increasing ring is connected to the fan housing, and a surrounding cover of the air-increasing ring is arranged on the air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0012] FIG1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment 1 of the present application;

[0013] FIG2 is a cross-sectional view of a fan module according to a specific embodiment 1 of the present application;

[0014] FIG3 is a front perspective schematic diagram of a connector according to a specific embodiment 1 of the present application;

[0015] FIG4 is a rear perspective schematic diagram of a connector according to a specific embodiment 1 of the present application;

[0016] FIG5 is a perspective schematic diagram of an air intensification hood according to a specific embodiment 1 of the present application;

[0017] FIG6 is a schematic diagram of the overall structure of a fan module according to a specific embodiment 2 of the present application;

[0018] FIG7 is an exploded schematic diagram of a first housing according to a second specific embodiment of the present application;

[0019] FIG8 is an exploded schematic diagram of a second housing according to a second specific embodiment of the present application;

[0020] FIG9 is a cross-sectional view of a fan module according to a second specific embodiment of the present application;

[0021] FIG10 is a cross-sectional view of the connection between the connection plate and the fan assembly according to a specific embodiment 2 of the present application;

[0022] FIG11 is a perspective schematic diagram of a connector according to a specific embodiment 2 of the present application;

[0023] FIG12 is a perspective schematic diagram of a first air hood according to a specific embodiment 2 of the present application;

[0024] FIG13 is a perspective schematic diagram of a second air hood according to a specific embodiment 2 of the present application;

[0025] FIG14 is a schematic structural diagram of a hub and blades according to a specific embodiment 3 of the present application;

[0026] FIG15 is a schematic structural diagram of a hub, blades, directions, and schematic angles of a specific embodiment 3 of the present application;

[0027] FIG16 is a schematic diagram of the overall structure of a fan blade according to a specific embodiment 4 of the present application;

[0028] FIG17 is a schematic structural diagram of a fan blade according to a fourth embodiment of the present application from a first perspective;

[0029] FIG18 is a schematic cross-sectional view of a fan blade according to a fourth embodiment of the present application;

[0030] FIG19 is a schematic structural diagram of a hub and blades according to a specific embodiment 4 of the present application;

[0031] FIG20 is a schematic structural diagram of the hub, blades, directions and angles of a specific embodiment 4 of the present application

[0032] FIG21 is a schematic diagram of the overall structure of a fan in Example 5;

[0033] FIG22 is a schematic structural diagram of a base, an oscillating device and a connecting rod in an embodiment 5;

[0034] FIG23 is a top view corresponding to FIG22;

[0035] FIG24 is a cross-sectional view taken along the cutting line AA in FIG23;

[0036] FIG25 is a cross-sectional view taken along the cutting line BB in FIG23;

[0037] FIG26 is a perspective view of a support column, end cap, rotating bracket, ball bearing cup and fixing ring of an oscillating device in Example 5 after being cut away;

[0038] FIG27 is an exploded view of the shaking device, connecting rod and base in Example 5;

[0039] FIG28 is a schematic structural diagram of a support column, a base, a fixing assembly and a transmission member in Example 5;

[0040] FIG29 is a schematic structural diagram of a support column, a base, a central gear, a locking member and a transmission member in an embodiment 5;

[0041] FIG30 is a schematic structural diagram of a rotating bracket and a limiting member in Example 5;

[0042] FIG31 is a schematic structural diagram of a support column and a limiting member after sectioning in Example 5;

[0043] FIG32 is a schematic structural diagram of a fan connection structure according to a specific embodiment 6 of the present application;

[0044] FIG33 is an exploded schematic diagram of a fan connection structure according to a sixth specific embodiment of the present application;

[0045] FIG34 is a schematic structural diagram of a fan cover according to a specific embodiment 6 of the present application;

[0046] FIG35 is a schematic structural diagram of a connecting shaft according to a specific embodiment 6 of the present application;

[0047] FIG36 is a schematic cross-sectional view of a specific embodiment 6 of the present application at AA in FIG32 ;

[0048] FIG37 is an enlarged structural diagram of point B in FIG36 according to a specific embodiment 6 of the present application;

[0049] FIG38 is a schematic structural diagram of a bracket according to a specific embodiment 6 of the present application;

[0050] FIG39 is a schematic structural diagram of a base housing according to a specific embodiment 6 of the present application;

[0051] FIG40 is an exploded schematic diagram of a fan oscillating structure according to a specific embodiment 7 of the present application;

[0052] FIG41 is a schematic diagram of a fan oscillating structure according to a seventh specific embodiment of the present application;

[0053] FIG42 is a schematic structural diagram of the AA portion in FIG40 according to a specific embodiment 7 of the present application;

[0054] FIG43 is a partial schematic diagram of a fan oscillating structure according to a seventh specific embodiment of the present application;

[0055] FIG44 is a second partial schematic diagram of a fan oscillating structure according to a seventh specific embodiment of the present application;

[0056] FIG45 is a third partial schematic diagram of a fan oscillating structure according to a specific embodiment 7 of the present application;

[0057] FIG46 is a fourth partial schematic diagram of a fan oscillating structure according to a seventh specific embodiment of the present application;

[0058] FIG47 is a partial schematic diagram 5 of a fan oscillating structure according to a specific embodiment 7 of the present application;

[0059] FIG48 is a schematic cross-sectional view at point BB in FIG47 according to a specific embodiment of the present application;

[0060] Figure 49 is a schematic structural diagram of the second bearing of a specific embodiment 7 of the present application. DETAILED DESCRIPTION

[0061] Example 1

[0062] Please refer to FIG1 , which is a schematic diagram of the overall structure of the fan module of this embodiment.

[0063] As shown in Figure 1, a fan module comprises a fan housing 1, a fan assembly 2, and an air boost ring 3. The fan housing 1 is provided with an air inlet structure 11 and an air outlet 12 corresponding to the air inlet structure 11. The fan assembly 2 is disposed within the fan housing 1 and is used to push air from the air inlet structure 11 to the air outlet 12. The air boost ring 3 is connected to the fan housing 1 and surrounds the air outlet 12.

[0064] In the above embodiment, the fan assembly 2 rotates, pushing the airflow entering the fan housing 1 from the air inlet structure 11 to the air outlet 12. After flowing out of the air outlet 12, the airflow has initial kinetic energy. The airflow with this initial kinetic energy will drive other air in contact with it to flow. At this time, the airflow flowing out of the air outlet 12 enters the air-increasing ring 3. The airflow in the air-increasing ring 3 has a flow difference, and then a negative pressure is generated inside the air-increasing ring 3. Under the action of atmospheric pressure, the airflow behind the air-increasing ring 3 will flow into the air-increasing ring and be driven by the airflow flowing out of the air outlet 12 to flow, thereby enhancing the wind force of the fan, increasing the air output of the fan, and improving the air output efficiency of the fan.

[0065] Please refer to FIG. 2 , which is a cross-sectional view of the fan module according to this embodiment.

[0066] As shown in Figure 2, the fan housing 1 includes: a first housing 15 and an air guide cover 14, the first housing 15 is connected to the air guide cover 14, the connecting piece 13 is connected to the air guide cover 14, the fan assembly 22 extends into the air guide cover 14, the air guide cover 14 is provided with a necking opening 141, and the fan assembly 21 is arranged between the necking opening 141 and the connecting piece 13.

[0067] The fan housing 1 is connected to a connecting piece 13 , the air outlet 12 is provided on the connecting piece 13 , the fan assembly 2 is connected to the connecting piece 13 , and the air increasing ring 3 is connected to the connecting piece 13 .

[0068] The fan housing 1 and the connector 13 are connected by snap-fitting. However, the connection method between the fan housing 1 and the connector 13 is not limited thereto. Depending on the specific application scenario, in some embodiments, the fan housing 1 and the connector 13 can be connected by gluing, riveting, screws, etc.

[0069] In some embodiments, the connection method between the fan housing 1 and the connector 13 can be: through an integrated molding manufacturing process. In this embodiment, due to the manufacturing process, the division between the fan housing 1 and the connector 13 is not obvious. The structural division between the two should be distinguished based on the functions to be implemented.

[0070] Please refer to FIG3 and FIG4 , FIG3 is a front perspective schematic diagram of the connecting member of this embodiment; FIG4 is a rear perspective schematic diagram of the connecting member of this embodiment.

[0071] As shown in Figures 3 and 4, the connecting member 13 includes: a connecting ring 133, a first cover body 134 and a plurality of wind guide plates 135. The connecting ring 133 is connected to the inner surface of the fan housing 1, and the plurality of wind guide plates 135 are distributed around the circumference of the first cover body 134. One end of each of the plurality of wind guide plates 135 is connected to the first cover body 134, and the other end of each wind guide plate 135 is connected to the connecting ring 133. The fan assembly 2 is connected to the first cover body 134. The connecting ring 133 and the first cover body 134 enclose an air outlet 12, and the air outlet 12 is annular.

[0072] The connecting ring 133 is connected to the first housing 15. The connection method can be (but is not limited to): gluing, clamping, and screws.

[0073] In this embodiment, the number of air guide plates 135 is 12, but the number of air guide plates 135 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of air guide plates 135 can be (not limited to): 2, 3, 6, 7, 8, 10, 13 or more.

[0074] The connecting ring 133 and the first cover 134 together form an annular slit air outlet 12. This annular slit air outlet 12 allows the airflow at the outlet 12 to have a higher initial velocity, resulting in a more concentrated air volume. Furthermore, the higher initial velocity creates a greater velocity difference within the air boost ring 3, generating a greater negative pressure and increasing the air volume of the air boost ring 3.

[0075] Along the direction of the air outlet 12, the distance between the first cover 134 and the fan housing 1 gradually decreases, the distance between the first cover 134 and the connecting ring 133 gradually decreases, and the width of each air guide plate 135 gradually decreases. Since the distance between the first cover 134 and the fan housing 1 gradually decreases, and the distance between the first cover 134 and the connecting ring 133 gradually decreases, it is equivalent to the space of the air flow channel inside the fan module gradually decreasing. Its purpose is to gradually pressurize the airflow flowing through the fan module, increase the initial velocity of the airflow at the air outlet 12, and the uniform pressurization process can avoid the loss of airflow energy due to sudden space reduction. Therefore, the structure with gradually decreasing spacing can make the airflow at the air outlet 12 more concentrated, the initial velocity higher, the negative pressure generated greater, and the wind-increasing effect more obvious.

[0076] Each air guide plate 135 curves and extends along the surface of the first cover 134 from the air outlet 12 to the air inlet structure 11, and the curvature direction of each air guide plate 135 is opposite to the rotational direction of the fan assembly 2. The curvature direction of the air guide plates 135 is opposite to the rotational direction of the fan assembly 2. When the fan assembly 2 rotates, it generates airflow rotating in the same direction. When the rotating airflow contacts the air guide plates 135, the reverse curvature of the air guide plates 135 creates an obtuse angle between the air guide plates 135 and the rotating airflow. This reduces the kinetic energy loss of the rotating airflow when it contacts the air guide plates 135, and at the same time, improves the airflow guidance efficiency of the air guide plates 135.

[0077] In some embodiments, the connecting ring 133 and the fan housing 1 are manufactured by integral molding.

[0078] Please refer to FIG5 , which is a three-dimensional schematic diagram of the air inflating cover of this embodiment.

[0079] As shown in FIG5 , a side of the first cover 134 facing the air-increasing ring 3 is raised to form a connecting plate 136 . A connecting column 131 is provided on a side of the connecting plate 136 facing the fan assembly 2 , and the fan assembly 2 is connected to the connecting column 131 .

[0080] The fan assembly 2 includes fan blades, a magnetic ring 23, a coil 24, and a rotating shaft (not shown). The fan blades are mounted on the magnetic ring 23, which in turn is mounted on the coil 24. One end of the rotating shaft is connected to the fan blades. A mounting hole 132 is defined on a connecting post 131 and extends through the connecting post 131. The coil 24 is mounted on the connecting post 131, and the other end of the rotating shaft passes through the coil 24 and the magnetic ring 23 and is inserted into the mounting hole 132.

[0081] The sleeve connection between the fan blades, magnetic ring 23, coil 24 and connecting column 131 can greatly reduce the volume of the fan assembly 2. The connection between the assembly hole 132 and the rotating shaft can further reduce the external volume of the fan assembly, making the fan assembly more compact.

[0082] The coil 24 is connected to the connecting post 131 by an interference fit. However, the connection between the coil 24 and the connecting post 131 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection between the coil 24 and the connecting post 131 can also be connected by (but not limited to) gluing, clamping, or bolting.

[0083] A shaft sleeve 25 and a retaining spring are provided in the assembly hole 132 . One end of the rotating shaft inserted into the assembly hole 132 passes through the shaft sleeve 25 and is connected to the retaining spring. The coil 24 is sleeved on the position where the shaft sleeve 25 is provided.

[0084] The connection between the assembly hole 132 and the shaft sleeve 25 is an interference fit. However, the connection between the assembly hole 132 and the shaft sleeve 25 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection between the shaft sleeve 25 and the assembly hole 132 can be (but not limited to): gluing or snapping.

[0085] A shaft sleeve 25 is provided in the assembly hole 132 , and the rotating shaft passes through the shaft sleeve 25 , so that the rotating shaft can rotate more smoothly.

[0086] The coil 24 is sleeved on the position where the sleeve 25 is set on the connecting shaft. Due to the supporting effect of the sleeve 25 on the connecting column 131, the physical strength of the position where the sleeve 25 is set is higher. The connection between the coil 24 and the connecting column 131 is an interference fit. The higher the physical strength, the greater the extrusion force allowed for the connection between the coil 24 and the connecting column 131, making the connection between the coil 24 and the connecting column 131 more stable.

[0087] The fan blades include a hub 22 and a plurality of blades 21 . The hub 22 is sleeved on the magnetic ring 23 and connected to one end of the rotating shaft.

[0088] In this embodiment, the hub 22 is configured to be conical, but the shape of the hub 22 is not limited thereto. Depending on the specific application scenario, in some embodiments, the hub 22 can be (but not limited to): hemispherical, truncated cone, or cylindrical.

[0089] In this embodiment, the plurality of blades 21 extend vertically, obliquely, curvedly, or spirally along the surface of the hub 22 from the bottom end of the hub 22 to the top end of the hub 22 .

[0090] In this embodiment, the number of blades 21 is two or more.

[0091] The side of the connecting plate 136 facing the fan assembly 2 is recessed to form a receiving ring 137. This ring surrounds the connecting post 131, and at least a portion of the fan assembly 2 extends into the receiving ring 137. This arrangement allows for a more compact assembly of the fan module. Furthermore, the reduced exposure reduces wind resistance within the fan module, improving airflow efficiency.

[0092] The fan assembly 2 also includes a PCB 26. The PCB 26 is secured to the coil 24 via screws or connected to the coil 24 via a bracket (not shown). The PCB 26 has through-holes formed therein. The PCB 26 is mounted on the connecting post 131 through the through-holes.

[0093] In some embodiments, the PCB circuit board 26 extends into the receiving ring 137. However, the relative relationship between the fan assembly 2 and the receiving ring 137 is not limited thereto. Depending on the specific application scenario, in some embodiments, the coil 24 or a portion of the coil 24 can also extend into the receiving ring 137.

[0094] In some embodiments, the fan assembly 2 includes: fan blades and a motor, the motor is connected to the connector 13, a rotating shaft is provided on the motor, and the fan blades are connected to the rotating shaft.

[0095] The air-increasing ring 3 includes: a first ring body 31, an air-increasing disk 33 and a plurality of connecting plates 32. The air-increasing disk 33 is connected to the connecting piece 13. The plurality of connecting plates 32 are distributed around the circumference of the air-increasing disk 33. One end of each of the plurality of connecting plates 32 is connected to the air-increasing disk 33, and the other end of each connecting plate 32 is connected to the first ring body 31.

[0096] In this embodiment, the diameter of the first ring body 31 is larger than the diameter of the air outlet 12. This structure enables the airflow blown out of the air outlet 12 to drive other airflows in the first ring body 31 to flow, thereby generating a speed difference of the airflow to form a negative pressure.

[0097] The air-increasing disc 33 is recessed inwardly toward the connecting piece 13 to form an arc-shaped surface 331. The air-increasing disc 33 is located in the middle area of ​​the air outlet. When the air outlet 12 discharges air, vortices will be generated at the position and extension path of the air-increasing disc 33. The surface of the air-increasing disc 33 is set to the arc-shaped surface 331, and the generated vortices will follow the guidance of the arc-shaped surface 331 and re-enter the air outlet area of ​​the air outlet 12 with lower wind resistance. Therefore, the arc-shaped surface 331 can reduce the wind resistance of the airflow vortex generated in the middle position of the air outlet 12, so that these airflow vortices can enter the air outlet path with lower energy loss, thereby improving the air outlet efficiency. At the same time, due to the guiding effect of the arc-shaped surface 331, the generated airflow vortex has a directionality and enters the air blowing path of the airflow, rather than interfering with the normal blowing airflow in the form of turbulence, further improving the air outlet efficiency.

[0098] Along the outlet direction of the air outlet 12, the width of the first ring body 31 is greater than the width of the air booster disc 33. Along the outlet direction, the width of the first ring body 31 is greater than the width of the air booster disc 33, allowing the first ring body 31 to completely cover the air booster disc 33 in the outlet direction. This structure allows the airflow from the air outlet 12 to completely enter the air booster ring 3, avoiding the problem of airflow overflowing from the air outlet 12 before entering the air booster ring 3 due to the insufficient width of the air booster ring 3, thereby reducing air outlet efficiency.

[0099] The air inlet structure 11 includes a plurality of air inlet holes 111, which are provided on the first housing 15. The air inlet holes 111 are provided on the side edge 151 and the bottom surface 152 of the first housing 15. However, the air inlet structure 11 is not limited to this. Depending on the specific application scenario, in some embodiments, the air inlet structure 11 is an air inlet provided on the bottom surface 152 of the housing, an air inlet slot provided on the side edge 151 of the housing, or an air inlet slot provided on the bottom surface 152 of the housing.

[0100] A filter assembly 4 is disposed within the first housing 15, covering the air inlet 111. The filter assembly 4 can be a sheet or pleated sheet of filter material. The filter assembly 4 is disposed within the first housing 15 and covers the inner surface of the first housing 15, which includes the ventilation holes. This facilitates filtering of the air entering the first housing 15, improving the quality of the airflow exiting the air outlet 12.

[0101] There is a gap between the first shell 15 and the end of the air guide cover 14 facing away from the connector 13, and a reinforcing rib is provided in the gap. One end of the reinforcing rib is connected to the first shell 15, and the other end of the reinforcing rib is connected to the air guide cover 14. One end of the filter element is inserted into the gap and connected to the reinforcing rib. The provision of the reinforcing rib can improve the connection strength between the first shell 15 and the air guide cover 14. In this embodiment, the reinforcing rib is an annular structure. The filter element is inserted into the gap between the first shell 15 and the air guide cover 14 to prevent the airflow from flowing back into the gap between the first shell 15 and the air guide cover 14 to form a cyclone. This improves the air outlet efficiency of the fan module.

[0102] The air guide cover 14 is further provided with a necking opening 141 , which can prevent the airflow entering the air guide cover from coming into contact with the blades 211 and then flowing back, thereby improving the air outlet efficiency.

[0103] The filter element includes a first assembly ring 43, a second assembly ring 44, a filter ring 41, and a filter disc 42. The filter ring 41 is connected to the first assembly ring 43 and the second assembly ring 44. The filter disc 42 is connected to the first assembly ring 43. The second assembly ring 44 is disposed within the gap and connected to the reinforcing rib. The first assembly ring 43 is connected to the bottom surface of the first housing 15. The use of the first assembly ring 43 and the second assembly ring 44 as the connecting member 13 connecting the filter ring 41 and the filter disc 42 to the first housing 15 facilitates improved assembly efficiency of the filter assembly 4.

[0104] The first assembly ring 43 is provided with a first assembly groove 431 and an annular storage cavity 433. The first assembly groove 431 is arranged around the annular storage cavity 433. The second assembly ring 44 is provided with a second assembly groove 441. One end of the filter ring 41 is inserted into the first assembly groove 431, and the other end of the filter ring 41 is inserted into the second assembly groove 441. The filter disc 42 is disposed within the annular storage cavity 433. By providing the groove and cavity, the first assembly ring 43 and the second assembly ring 44 can be adaptively connected to the shape of the filter ring 41 and the filter disc 42, thereby increasing the connection strength with the filter ring 41 and the filter disc 42 and improving the airtightness of the connection.

[0105] The first assembly ring 43 is further provided with a first connecting groove 432 , which is opposite to the opening direction of the first assembly groove 431 , and the opening of the first connecting groove 432 faces the bottom surface 152 of the shell. A connecting colloid is provided in the first connecting groove 432 , and the connecting colloid connects the first assembly ring 43 and the bottom surface 152 of the shell.

[0106] The second assembly ring 44 is further provided with a second connecting groove 442 , which is opposite to the opening direction of the second assembly groove 441 and faces the reinforcing rib. A connecting colloid is provided in the second connecting groove 442 , which connects the second assembly ring 44 and the reinforcing rib.

[0107] The air boost ring is provided with a lampshade (not shown), which is located on the inner surface of the air boost ring. However, the location of the lampshade is not limited to this. Depending on the specific application scenario, in some embodiments, the lampshade can be located on the sides of the air boost ring at both ends, or on the outer surface of the air boost ring.

[0108] A light-emitting body is provided inside the lampshade, and the light-emitting body can be (but is not limited to): LED lamp beads, LED light strips or spherical bulbs, etc.

[0109] The fan module equipped with a lampshade can provide lighting for users while blowing air, especially in environments with high temperatures and requiring supplementary lighting, achieving multi-purpose use of one machine and improving user convenience.

[0110] Example 2

[0111] Please refer to FIG6 , which is a schematic diagram of the overall structure of the fan module of this embodiment.

[0112] As shown in Figure 6, a fan module comprises a fan housing 1, a fan assembly 4, and an air duct 3. The fan housing 1 is provided with an air inlet structure 111 and an air outlet 121 corresponding to the air inlet structure 111. The fan assembly 4 is disposed within the fan housing 1 and is used to propel air from the air inlet structure 111 to the air outlet 121. The air duct 3 is disposed within the fan housing 1, with one end of the air duct 3 located in the negative pressure area created by the air outlet 121, and the other end of the air duct 3 located on the surface of the fan housing 1.

[0113] In the above embodiment, the fan assembly 4 rotates, pushing the airflow entering the fan housing 1 from the air inlet structure 111 to the air outlet 121. After flowing out of the air outlet 121, the airflow has initial kinetic energy. The airflow with this initial kinetic energy will drive other air in contact with it to flow. At this time, the air around the air outlet 121 will generate a negative pressure area as the airflow flows. After the negative pressure area is generated, the surrounding air will flow towards the negative pressure area, and the turbulence generated will affect the efficiency of the airflow blown out of the air outlet 121. An air increase duct 3 is provided on the fan housing 1. One end of the air increase duct 3 is provided on the surface of the fan housing 1, and the other end is located in the negative pressure area formed by the air outlet 121. The external airflow will flow to the negative pressure area in a directional manner through the air increase duct 3. The directional airflow will not generate turbulence that affects the flow of the airflow blown out of the air outlet 121, but can drive the external airflow to flow in a directional manner, thereby enhancing the wind force of the fan and improving the air outlet efficiency in two aspects.

[0114] The fan housing 1 includes: a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 are connected, the air inlet structure 111 is opened on the first housing 11, the air outlet 121 is opened on the second housing 12, the fan assembly 4 is arranged in the first housing 11 and / or the second housing 12, and the air increase pipe 3 is arranged on the second housing 12.

[0115] In some embodiments, the first housing 11 and the second housing 12 can be manufactured by an integral casting process. In this embodiment, the fan housing 1 is a whole.

[0116] Please refer to FIG. 7 , which is an exploded schematic diagram of the first shell of this embodiment.

[0117] As shown in FIG7 , in some embodiments, the fan assembly 4 is disposed in the first housing 11. However, the location of the fan assembly 4 is not limited thereto. Depending on the specific application scenario, in some embodiments, the fan assembly 4 can be disposed in the second housing 12, or between the first housing 11 and the second housing 12.

[0118] Setting the air intake structure 111 on the first shell 11 and the air increase pipe 3 on the second shell 12 can make the air intake structure 111 and the air increase pipe 3 relatively far apart, avoid mutual interference between the air intake structure 111 and the air increase pipe 3 when taking in air, and enhance the air intake efficiency of each of the two structures.

[0119] Along the air outlet direction of the air outlet 121, the cross-sectional area of ​​the second shell 12 is larger than the cross-sectional area of ​​the first shell 11. The first shell 11 and the second shell 12 are constructed into a stepped structure, the second shell 12 is located at the lower end of the stepped structure, and the first shell 11 is located at the upper end of the stepped structure. The cross-sectional area of ​​the second shell 12 is larger than the cross-sectional area of ​​the first shell 11. The structure of the first shell 11 and the second shell 12 can effectively avoid the problem of mutual interference caused by the air intake pipe 3 and the air intake structure 111 taking in air in the same space. Since the air intake pipe 3 is arranged on the second shell 12, the cross-sectional area of ​​the second shell 12 is larger than that of the first shell 11, that is, compared with the position of the air intake structure 111, the air intake pipe 3 has a wider air source than the air intake structure 111, and the probability of mutual interference with the air intake structure 111 is smaller.

[0120] Please refer to FIG8 , which is an exploded schematic diagram of the second shell of this embodiment.

[0121] As shown in Figure 8, the second shell 12 includes: a shell side 122 and a shell bottom 123, with a smooth transition between the shell side 122 and the shell bottom 123, the shell bottom 123 is connected to the first shell 11, one end of the first cover body 131 is connected to the shell bottom 123, and the other end of the first cover body 131 is connected to the shell side 122, and the air increase pipe 3 is arranged at one end on the second shell 12, and is arranged at the transition position between the shell side 122 and the shell bottom 123.

[0122] Setting the end of the air-intake pipe 3 used for air intake at the transition position between the side edge 122 of the shell and the bottom surface 123 of the shell can make the air intake space of the air-intake pipe 3 and the air intake space of the air intake structure 111 have a larger spatial distance, avoiding interference between the air intake space of the air-intake pipe 3 and the air intake space of the air intake structure 111 in the three-dimensional space, thereby improving the air intake efficiency of each air intake.

[0123] Please refer to FIG9 , which is a cross-sectional view of the fan module according to this embodiment.

[0124] As shown in Figure 9, the fan module further includes a connector 16, which is connected to the first housing 11 and the fan assembly 4 is connected to the connector 16. The connector 16 allows the fan assembly 4 to be suspended in the fan housing 1, thereby improving the rotation efficiency of the fan assembly 4.

[0125] In some embodiments, the connector 16 is disposed within the second housing 12 , or the connector 16 is disposed between the first housing 11 and the second housing 12 .

[0126] In some embodiments, the connector 16 can be integrally formed with the fan housing 1 .

[0127] The connecting member 16 includes: a connecting ring 161, a connecting plate 163 and a plurality of first air guide plates 162. The connecting ring 161 is connected to the inner surface of the first shell 11. The plurality of first air guide plates 162 are arranged around the connecting plate 163. One end of each of the plurality of first air guide plates 162 is connected to the connecting ring 161, and the other end is connected to the connecting plate 163. The fan assembly 4 is connected to the connecting plate 163.

[0128] In some embodiments, the connecting ring 161 is disposed within the second housing 12 , or the connecting ring 161 is disposed between the first housing 11 and the second housing 12 .

[0129] In some embodiments, the connecting ring 161 can be integrally formed with the fan housing 1 . Therefore, in some embodiments, the plurality of first air guide plates 162 can be directly connected to the inner surface of the fan housing 1 .

[0130] The structural arrangement of the connecting ring 161 , the connecting plate 163 and the plurality of first air guide plates 162 enables the connecting member 16 to ensure that the fan assembly 4 is suspended in the air while guiding the airflow inside the fan housing 1 .

[0131] The plurality of first air guide plates 162 are all curved, and the curvature of the plurality of first air guide plates 162 is opposite to the direction of rotation of the fan assembly 4. The curvature of one end of the first air guide plate 162 is opposite to the direction of rotation of the fan assembly 4. This structure enables, when the first air guide plate 162 contacts the airflow, the contact angle between the airflow and the first air guide plate 162 is an obtuse angle greater than 90°. Since the function of the first air guide plate 162 is to guide the airflow toward the air outlet 121, the obtuse angle when the first air guide plate 162 contacts the airflow can improve the air guiding efficiency of the first air guide plate 162 and thus improve the air outlet efficiency of the fan module.

[0132] Please refer to FIG11 , which is a three-dimensional schematic diagram of the connecting member of this embodiment.

[0133] As shown in Figure 11, the side of the connecting plate 163 facing the air inlet structure 111 is raised to form a connecting post 164, and the fan assembly 4 is connected to the connecting post 164. The connection post 164 is provided on the connecting plate 163 to make the connection between the fan assembly 4 and the connector 16 more convenient and quick.

[0134] The fan module further includes a buffer ring 17 , which is sleeved on the connecting ring 161 and disposed in the engaging space between the first shell 11 and the second shell 12 .

[0135] An annular retaining edge 112 is disposed within the first housing 11, forming a snap-fit ​​space between the annular retaining edge 112 and the second housing 12. The provision of the buffer ring 17 can buffer and eliminate the vibration and noise generated by the rotation of the fan assembly 4, thereby improving the rotation efficiency of the fan assembly 4 and reducing the rotational noise of the fan module. Placing the buffer ring 17 between the annular retaining edge 112 and the second housing 12 improves space utilization and makes the fan module structure more compact. Furthermore, the buffer ring 17 acts as a buffer component between the first and second housings 11, 12, reducing the rigid friction between the first and second housings 11, 12.

[0136] The surface of the buffer ring 17 is provided with anti-slip teeth 172 and / or anti-slip protrusions 171. In this embodiment, the side of the buffer ring 17 that contacts the inner surface of the second shell 12 is provided with anti-slip teeth 172; the side of the buffer ring 17 that contacts the annular retaining edge 112 and the second shell 12 is provided with anti-slip protrusions 171. In some embodiments, the surface of the buffer ring 17 is provided with anti-slip protrusions 171 or anti-slip teeth 172. The provision of anti-slip teeth 172 and / or anti-slip protrusions 171 can increase the stability of the connection of the buffer ring 17 and reduce the risk of falling off. The provision of the anti-slip teeth 172 and / or anti-slip protrusions 171 can also give the buffering force of the buffer ring 17 a hierarchical structure. Due to the presence of the anti-slip teeth 172 and / or anti-slip protrusions 171, the initial pressure can only cause the anti-slip teeth 172 and / or anti-slip protrusions 171 to deform first. Since the area of ​​the anti-slip teeth 172 and / or anti-slip protrusions 171 is smaller than the entire area of ​​the buffer ring 17, the force they can withstand is relatively small, so the range of buffer deformation is larger, and the buffering effect is better. When the pressure exerted on the anti-slip teeth 172 and / or anti-slip protrusions 171 causes them to adhere to the surface of the buffer ring 17, the buffer ring 17 is subjected to force as a whole, can withstand greater buffering force, and has less room for deformation. The combination of the two can provide a better buffering effect.

[0137] Please refer to FIG. 10 , which is a cross-sectional view of the fan module according to this embodiment.

[0138] As shown in Figure 10, the fan assembly 4 includes fan blades 41, a magnetic ring 42, a coil 43, and a rotating shaft 44. The fan blades 41 are mounted on the magnetic ring 42, which is mounted on the coil 43. One end of the rotating shaft 44 is connected to the fan blades 41. The connecting post 164 has an assembly hole 165 extending therethrough. The coil 43 is mounted on the connecting post 164. The other end of the rotating shaft 44 passes through the coil 43 and the magnetic ring 42 and is inserted into the assembly hole 165.

[0139] The sleeve connection between the fan blades 41, the magnetic ring 42, the coil 43, and the connecting post 164 can greatly reduce the volume of the fan assembly 4. The connection between the assembly hole 165 and the rotating shaft 44 can further reduce the external volume of the fan assembly 4, making the fan assembly 4 more compact.

[0140] The connection between the coil 43 and the connecting post 164 is an interference fit. However, the connection between the coil 43 and the connecting post 164 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection between the coil 43 and the connecting post 164 can also be connected by (but not limited to) gluing, clamping, or bolting.

[0141] A shaft sleeve 45 and a retaining spring 46 are provided in the assembly hole 165 . One end of the rotating shaft 44 inserted into the assembly hole 165 passes through the shaft sleeve 45 and is connected to the retaining spring 46 . The coil 43 is sleeved on the position where the shaft sleeve 45 is provided on the connecting column 164 .

[0142] The coil 43 is also connected to a PCB board 49, which has holes therein so that the PCB board 49 can also be fitted onto the connecting post 164. Stacking the coil 43 and the PCB board 49 can reasonably utilize the idle space and make the fan module structure more compact.

[0143] The connection between the assembly hole 165 and the shaft sleeve 45 is an interference fit. However, the connection between the assembly hole 165 and the shaft sleeve 45 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection between the shaft sleeve 45 and the assembly hole 165 can be (but not limited to): gluing or snapping.

[0144] A shaft sleeve 45 is provided in the assembly hole 165 , and the rotating shaft 44 passes through the shaft sleeve 45 , so that the rotating shaft 44 can rotate more smoothly.

[0145] The coil 43 is sleeved on the position where the sleeve 45 is set on the connecting column 164. Due to the supporting effect of the sleeve 45 on the connecting column 164, the physical strength of the position where the sleeve 45 is set is higher. The connection between the coil 43 and the connecting column 164 is an interference fit. The higher the physical strength, the greater the extrusion force allowed for the connection between the coil 43 and the connecting column 164, making the connection between the coil 43 and the connecting column 164 more stable.

[0146] A first buffer pad 47 and a second buffer pad 48 are provided in the assembly hole 165 . The first buffer pad 47 and the second buffer pad 48 are both sleeved on the rotating shaft 44 , and the first buffer pad 47 is provided between the shaft sleeve 45 and the fan blade 41 , and the second buffer pad 48 is provided between the retaining spring 46 and the shaft sleeve 45 .

[0147] The design of the first buffer pad 47 and the second buffer pad 48 can effectively prevent physical friction between the shaft sleeve 45 and the fan blades 41, and between the shaft sleeve 45 and the retaining spring 46, thereby extending the service life of the fan assembly 4.

[0148] A protrusion within the assembly hole 165 forms a stopper 165a, which abuts against the shaft sleeve 45. In this embodiment, the stopper 165a is an annular protrusion. However, the structure of the stopper 165a is not limited to this. Depending on the specific application scenario, in some embodiments, the stopper 165a can be a raised point-shaped stopper 165a.

[0149] The provision of the stopper 165 a can make the installation of the shaft sleeve 45 more convenient and standardized, and avoid assembly difficulties and accidental wear of the fan assembly 4 due to changes in the installation position of the shaft sleeve 45.

[0150] The fan blades 41 include: a hub 411 and multiple blades 412. The hub 411 is sleeved on the magnetic ring 42 and connected to one end of the rotating shaft 44. The hub is constructed in a frustum shape. The multiple blades 412 are arranged on the side of the hub 411 along the circumference of the hub 411, and each of the multiple blades 412 is arranged at an angle along the side of the hub 411.

[0151] The hub 411 is constructed to rotate like a cone. When viewed from the direction of air inlet of the fan assembly 4 , the cross-sectional area of ​​the fan blades 41 gradually increases, and the airflow restraining ability gradually increases, thereby improving the air outlet efficiency of the fan blades 41 .

[0152] In this embodiment, the number of blades 412 is two or more. The blades 412 are tilted along the side of the hub 411, which can make the wind restraint ability of the fan blades 41 change linearly when rotating, thereby improving the air output efficiency of the fan blades 41.

[0153] In some embodiments, the fan assembly 4 further includes a metal ring disposed between the hub 411 and the magnetic ring 42. The metal ring and the magnetic ring 42 are connected by an interference fit, and the hub 411 and the metal ring are also connected by an interference fit. The metal ring enhances the physical strength of the magnetic ring 42, preventing it from breaking due to uneven compression or excessive pressure.

[0154] The fan module also includes: a first air hood 13 and a second air hood. The first air hood 13 is arranged in the second shell 12, and the second air hood is sleeved in the first air hood 13. The first air hood 13 and the second air hood together form an air outlet 121. One end of the air increase pipe 3 is opened on the second shell 12, and the other end of the air increase pipe 3 obliquely passes through the first air hood 13 and the second air hood.

[0155] Please refer to FIG12 , which is a perspective schematic diagram of the first air hood of this embodiment.

[0156] As shown in Figure 12, the air outlet 121 formed by the first and second air shrouds is an annular air outlet 121. The structure of the annular air outlet 121 can create a negative pressure area within the air outlet 121, and the negative pressure range and range are more stable. The air booster pipe 3 passes through the first and second air shrouds at an angle, which can place one end of the air booster pipe 3 in the negative pressure area, ensuring the air outlet efficiency of the air booster pipe 3.

[0157] In some embodiments, the shape of the air outlet 121 is (but not limited to) circular, elliptical, polygonal, or irregular. In this embodiment, the negative pressure area at the air outlet 121 is not located inside or at the center of the air outlet 121, but is located outside the air outlet 121. Accordingly, in this embodiment, one end of the air increase pipe 3 is located on the fan housing 1, and the other end or the extension of the other end is located outside the air outlet 121.

[0158] Along the air inlet structure 111 toward the air outlet 121, the distance between the first air hood 13 and the second air hood gradually decreases. The gap between the first air hood 13 and the second air hood constitutes the air duct of the fan module in the second housing 12. When the distance between the first air hood 13 and the second air hood gradually decreases, it means that the air duct is getting narrower and narrower along the direction of the air outlet 121. The smaller the air duct, the higher the initial kinetic energy of the airflow out of the air outlet 121, the faster the airflow movement speed, and the better the blowing effect. At the same time, the increase in the airflow velocity at the air outlet 121 will lower the negative pressure value in the negative pressure area in the middle of the air outlet 121, thereby improving the air increase efficiency of the air increase pipe 3.

[0159] The fan module also includes a negative pressure cover 15, which is disposed within the second air hood. The side of the negative pressure cover 15 is connected to the side of the second air hood at the air outlet 121. The air booster pipe 3 passes through one end of the first air hood 13 and the second air hood and is connected to the negative pressure cover 15. The provision of the negative pressure cover 15 can further stabilize the negative pressure area.

[0160] The first air hood 13 includes: a first cover body 131, an air condensation plate 133, and a plurality of second air guide plates 132. The first cover body 131 is connected to the second shell 12. The plurality of second air guide plates 132 are arranged around the air condensation plate 133. One end of each of the plurality of second air guide plates 132 is connected to the inner surface of the first cover body 131, and the other end is connected to the air condensation plate 133. The end of the air duct 3 connected to the negative pressure cover 15 passes through the first air condensation cover and the second air condensation cover and is connected to the negative pressure cover 15. The end of the air duct 3 connected to the negative pressure cover 15 is exposed on the inner surface of the air condensation plate 3. The structure of the first air condensation cover 13 is that the air condensation plate 133 is arranged in the middle position of the first cover body 131, which reduces the channel area of ​​the first air condensation cover 13 available for air flow circulation, thereby accelerating the airflow for the first time. The first air condensation cover 13 and the second air condensation cover further continuously accelerate the airflow for a second time, so that the initial kinetic energy of the airflow flowing through the fan module is greater.

[0161] The air restraining plate 133 is covered on the connecting plate 163, and the multiple first air guide plates 162 and the multiple second air guide plates 132 correspond one to one, and each second air guide plate 132 abuts against its corresponding first air guide plate 162. The one-to-one correspondence between the first air guide plate 162 and the second air guide plate 132 can avoid the first air guide plate 162 and the second air guide plate 132 from being staggered, thereby obstructing the airflow in the fan module and improving the air outlet efficiency. The air restraining plate 133 is covered on the connecting plate 163, which is equivalent to extending the length of the connecting plate 163 in the airflow path, avoiding the formation of vortices on the back of the connecting plate 163 when the airflow flows through the connecting plate 163, and also improving the air outlet efficiency of the fan assembly 4.

[0162] Please refer to FIG13 , which is a perspective schematic diagram of the second air hood of this embodiment.

[0163] As shown in Figure 13, the end of the second air hood facing away from the air outlet 121 is mounted on the air hood tray 133. The second air hood is mounted on the air hood tray 133, sealing the connection between the second air hood and the first air hood 13. This prevents airflow from within the fan assembly 4 from escaping from the edge where the first and second air hoods connect, thereby reducing the efficiency of airflow from the air outlet 121. Furthermore, the mounting of the second air hood prevents the airflow from forming vortices on the back of the air hood tray 133, further improving the airflow efficiency of the fan module.

[0164] In some embodiments, the connecting member 16 and the first air shroud 13 can be manufactured by an integral molding technique.

[0165] The negative pressure cover 15 is concave inward toward the first shell 11 to form an arc-shaped surface 151, and the surface of the air-binding plate facing the negative pressure cover 15 is concave to form an arc-shaped groove 136. The arc-shaped groove 136 cooperates with the negative pressure cover 15 to increase the concave space of the negative pressure cover 15. The negative pressure cover 15 is concave inward to form an arc surface, which can guide the airflow flowing out of the air-increasing pipe 3, so that the airflow flowing out of the air-increasing pipe 3 can be gathered and guided along the arc surface, thereby improving the air outlet efficiency of the air-increasing pipe 3. The surface of the air-binding plate facing the negative pressure cover 15 is concave to form an arc-shaped groove 136. The arc-shaped groove 136 cooperates with the arc formed by the concave negative pressure cover 15, so that the negative pressure cover 15 has a larger concave space, a larger concave curvature, a stronger guiding effect on the airflow, and can also improve the air outlet efficiency of the fan module.

[0166] A plurality of support plates 134 are provided in the first air hood 13, and a plurality of connecting grooves 141 are opened on the outer surface of the second air hood 14. The plurality of support plates 134 correspond one-to-one to the plurality of connecting grooves 141, and each of the plurality of support plates 134 is inserted into the corresponding connecting groove 141, and the plurality of connecting grooves 141 extend along the outer surface of the second air hood 14.

[0167] The number of the supporting plates 134 is two or more, and the number of the corresponding connecting slots 141 is also two or more.

[0168] Multiple support plates 134 are arranged on the inner surface of the first cover 131 at the end facing the air outlet 121. These support plates 134 are arranged in a circular pattern, and the ends of the support plates 134 that contact the second cover are curved. Connecting grooves 141 extend along the outer surface of the second air shroud 14. The areas where the connecting grooves 141 do not contact the supporting portion guide the airflow. The provision of support plates 134 maintains a relatively stable gap between the first and second air shrouds, facilitating uniform airflow from the fan module and improving its efficiency.

[0169] In this embodiment, the air inlet structure 111 is a plurality of air inlet holes 111a provided on the second housing 12. The air inlet holes 111a are provided on the side of the first housing 11. However, the location of the air inlet holes 111a is not limited thereto. Depending on the specific application scenario, in some embodiments, the air inlet holes 111a can be provided on the bottom surface of the first housing 11.

[0170] The structure of the air inlet structure 111 is not limited to the air inlet hole 111a. According to different specific application scenarios, in some embodiments, the air inlet structure 111 can be an air inlet opened on the second housing 12.

[0171] The fan module also includes a filter layer 2, which is disposed within the second housing 12 and located in a position corresponding to the air inlet structure 111. The filter layer 2 is an air filter material made of filter cotton, activated carbon, fabric, etc. The filter layer 2 is constructed as a folded structure, but the structure of the folded layer is not limited to this. Depending on the specific application scenario, in some embodiments, the filter layer 2 can be a flat structure.

[0172] One end of the filter layer 2 abuts against the annular retaining edge 112 , and the other end of the filter layer 2 is connected to the bottom surface of the first shell 11 .

[0173] In this embodiment, the filter layer 2 is configured in a ring shape. However, the shape of the filter layer 2 is not limited thereto. Depending on the specific application scenario, in some embodiments, the filter layer 2 can be configured in (but not limited to) a columnar, spherical, or ellipsoidal shape.

[0174] The air inlet structure 111 is designed as an air inlet hole 111 a, which can prevent larger foreign objects or fingers from entering the fan module and causing unnecessary damage.

[0175] A filter layer 2 is provided in the fan module to filter the air flowing through the fan module and purify the air.

[0176] The combination of the filter layer 2 and the plurality of air inlet holes 111 a can make the positions where the filter layer 2 filters the air more widely distributed, thereby improving the filtering effect of the fan module.

[0177] The fan module further includes an air guide 18 disposed within the first housing 11, with one end of the air guide 18 connected to the connecting ring 161 and the other end of the air guide 18 connected to the filter layer 2. The air guide 18 is shaped like a trumpet and is positioned over the fan blades 41. Because the air guide 18 prevents backflow of air flowing through the fan blades 41, the design of the air guide 18 can improve the air output efficiency of the fan module.

[0178] In some embodiments, the air guide cover 18 and the first fan housing 1 can be manufactured as one piece, and the inner wall of the first housing 11 is raised to construct a structure identical to that of the air guide cover 18, thereby achieving the same function as the air guide cover 18 through the integrated structure.

[0179] In this embodiment, there are six air ducts, which are distributed in a truncated cone shape on the second housing 12. It should be noted that the number of air ducts is not limited to this. Depending on the specific application scenario, in some embodiments, the number of air ducts can be 1, 2, 3, 4, 5, 7, or more.

[0180] The air duct includes a first end 31 and a second end 32. The second housing 12 is provided with the same number of first through-holes 124 as the air duct. The first air hood 13 is provided with the same number of second through-holes 135 as the air duct. The second air hood is provided with the same number of third through-holes 142 as the air duct. The air hood is provided with the same number of fourth through-holes 152 as the air duct. The first end 31 of the air duct is exposed outside the first through-hole 124, while the second end 32 passes through the corresponding first through-hole 124, second through-hole 135, third through-hole 142, and fourth through-hole 152, and is exposed on the surface of the negative pressure hood 15.

[0181] Example 3

[0182] Please refer to Figures 14 and 15. Figure 14 is a schematic structural diagram of the hub and blades of this embodiment; Figure 15 is a schematic structural diagram of the hub, blades, directions and schematic angles of this embodiment.

[0183] As shown in Figures 14 and 15 , a fan blade comprises a hub 1 and a plurality of blades 2. The hub 1 is connected to the fan motor; the plurality of blades 2 are disposed around the outer surface of the hub 1; each blade 2 extends along the surface of the hub 1, curving from a top end 11 of the hub 1 toward a side edge 12, and each blade 2 is twisted.

[0184] In this embodiment, the overall shape of the wheel hub 1 is configured as a truncated cone. However, the overall shape of the wheel hub 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the overall shape of the wheel hub 1 can be configured as a cone, bullet, hemispherical, cylindrical, etc.

[0185] The number of blades 2 in this embodiment is 9, but the number of blades 2 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of blades 2 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

[0186] In the above embodiment, each of the multiple blades 2 is bent and extended from the top end 11 of the hub 1 to the side edge position 12 along the surface of the hub 1, and each blade 2 is in a twisted shape. During the rotation of the fan blades 2, the blades 2 push the airflow to rotate. Therefore, the airflow movement path within the fan blades is curved, and each blade 2 is bent and extended from the top end 11 of the hub 1 to the side edge position 12, which can make the shape of the blade 2 fit the curved path of the airflow movement, so that the air pushing efficiency and air guiding efficiency of the fan blades are significantly improved. When the fan blades rotate, the effect of each position of the blade 2 on the airflow is different. For example, at the tip 22 position, the main function of the blade 2 is to cut the wind, at the tip 22 and the tail 23 position, it is used to guide the wind, and at the tail 23 position, it is mainly used to discharge the wind. Since each position of blade 2 has a different function, the shape of blade 2 at each position is also different. For example, at the tip 22 position, blade 2 is required to point in the direction of rotation of the fan blade to facilitate cutting the wind; between the tip 22 and the tail 23, the vertical distance between blade 2 and hub 1 needs to be larger to facilitate receiving and intercepting more airflow; and at the tail 23, blade 2 needs to extend in the opposite direction of the fan blade rotation direction D1 to reduce the friction between blade 2 and the outflowing airflow, thereby reducing the aerodynamic wind noise and rotational resistance of the fan blade. The twisted shape of blade 2 can meet the actual use requirements of different positions, improve the air outlet efficiency of the fan blade, and reduce the aerodynamic wind noise of the fan blade.

[0187] The hub 1 is configured in a conical or truncated cone shape. This configuration allows the cross-section of one end of the hub 1 to be smaller than that of the other end. The smaller cross-section of the hub 1 provides more space for the blades 2, thereby increasing the area of ​​the blades 2 used to cut the wind and improving wind cutting performance.

[0188] In this embodiment, the airflow direction of the fan blades during operation is from the top end 11 of the hub 1 to the edge position 12. Overall, the air inlet direction of the fan blades is the direction indicated by D2.

[0189] In some embodiments, each blade 2 of the plurality of blades 2 includes a blade tip 22 , and the direction facing the blade tip 22 is the same as the rotation direction D1 of the fan blade.

[0190] The orientation of the blade tip 22 is the same as the rotation direction D1 of the fan blade. The orientation of the blade tip 22 enables the blade tip 22 to form a "shovel" posture with the airflow. In this posture, the blade tip 22 can more easily cut the airflow and facilitate the cut airflow to enter the interior of the fan blade along the guidance of the blade tip 22. Therefore, the orientation of the blade tip 22 can increase the airflow entering the fan blade and reduce wind resistance and aerodynamic noise when the fan blade rotates.

[0191] In some embodiments, each blade 2 of the plurality of blades 2 includes a blade tip 22 , and an angle θ1 between an extension line L1 of a pointing direction of the blade tip 22 and a horizontal direction H1 is an acute angle.

[0192] In this embodiment, the orientation of the blade tip 22 refers to the orientation of the blade tip 22 relative to the horizontal direction, and the direction of the blade tip 22 refers to the direction in which the end of the blade tip 22 points.

[0193] The angle θ1 between the extension line L1 of the direction in which the blade tip 22 points and the horizontal direction H1 is an acute angle, which can enable the blade tip 22 to form a "shovel" posture with the contacting airflow. In this posture, the angle between the blade tip 22 and the cut airflow is an acute angle, which can more conveniently and labor-savingly cut the airflow, reduce the airflow resistance of the fan blade rotation, and improve the rotation efficiency of the fan blade.

[0194] In some embodiments, a cutting wind bevel 24 is provided at the position of the blade tip 22, and the cutting wind bevel 24 extends in the opposite direction of the rotation direction D1 of the fan blade. The end of the cutting wind bevel 24 is more pointed, which enables the fan blade to better cut the airflow when the fan blade rotates, reducing the resistance of the fan blade during the rotation process, and making the rotation efficiency of the fan blade higher. At the same time, because the cutting wind bevel 24 extends in the opposite direction of the rotation direction D1 of the fan blade, the blade 2 can better guide the airflow flowing through the surface of the fan blade, so that the airflow is separated from the blade 2 of the fan blade at a larger angle, reducing the noise generated by the side and the airflow.

[0195] The position of the blade tip 22 is not limited to being provided with the wind-cutting inclined surface 24 . Depending on the specific application scenario, in some embodiments, the position of the blade tip 22 can be a rounded blunt structure or a prismatic structure.

[0196] In some embodiments, the wind-cutting slope 24 includes: a curved portion 241 and a linear portion 242 , one end of the linear portion 242 is connected to the surface of the hub 1 , the other end of the linear portion 242 is connected to the curved portion 241 , and the other end of the curved portion 241 is connected to the blade edge 21 .

[0197] In some embodiments, the angle between blade tip 22 and blade edge 21 is an acute angle θ2. The configuration of blade tip 22 and blade edge 21 allows the outermost end of blade tip 22 to be raised to form a sharp point. This acute angle allows the contact area of ​​blade tip 22 to gradually increase as the fan blade rotates, making it easier for the fan blade to cut through the airflow. This reduces wind resistance and improves the fan blade's rotational efficiency.

[0198] The angle between the blade tip 22 and the blade edge 21 is not limited thereto. Depending on the specific application scenario, in some embodiments, the angle between the blade tip 22 and the blade edge 21 can be a right angle or an obtuse angle.

[0199] In some embodiments, each blade 2 of the plurality of blades 2 includes a blade tail 23 , which bends and extends in a direction opposite to the rotation direction D1 of the fan blade.

[0200] Due to the interaction of forces, when the fan blades rotate along their rotational direction D1, the airflow flowing through the fan blades tends to move in the opposite direction of the fan blades' rotational direction. When the airflow flows along the shape of blade 2, the blade tail 23 bends and extends in the opposite direction of the fan blades' rotational direction D1. This curved structure conforms to the flow trend of the airflow within the fan blades, making the blades 2 more smoothly restrain the airflow and improving the fan's air output efficiency. At the same time, because the curvature of the blade tail 23 is consistent with the flow trend of the airflow, it can reduce the friction between the blade tail 23 and the airflow when the airflow flows out of the business, thereby reducing the aerodynamic noise generated by the airflow at the blade tail 23.

[0201] In some embodiments, the wind-cutting slope 24 comprises a curved portion 241 and a linear portion 242. One end of the linear portion 242 is connected to the surface of the hub 1, the other end of the linear portion 242 is connected to the curved portion 241, and the other end of the curved portion 241 is connected to the blade edge 21. The outer portion of the wind-cutting slope 24 is configured as the curved portion 241. As the blade 2 rotates with the hub 1, the contact surface between the curved portion 241 and the airflow gradually increases, and the curved portion 241 located on the outer side has a greater linear velocity. Therefore, the curved portion 241 can better cut the airflow, increasing the wind-cutting capability of the blade tip 22. Furthermore, because the curved portion 241 contacts the airflow at different locations in a gradual and graded manner, it reduces airflow resistance and aerodynamic noise generated by the fan blades during rotation. The linear portion 242, connected to the curved portion 241, is located on the inner side of the blade tip 22. Its linear velocity during rotation is lower than that of the curved portion 241, thus experiencing less wind resistance. The straight structure of the linear portion 242 enables the linear portion 242 to contact the airflow synchronously, thereby increasing the cutting area of ​​the cutting slope 24 , so that the cutting slope 24 can increase the cutting efficiency through the curved portion 241 and increase the cutting volume through the linear portion 242 .

[0202] In some embodiments, the length of the blade tip 22 is greater than the length of the blade tail 23. The blade tip 22 is used to cut air during fan blade rotation. Increasing the length of the blade tip 22 can increase the cutting area of ​​the blade tip 22 and improve the air intake efficiency of the blade tip 22. The blade tail 23 is used to discharge air. A smaller width of the blade tail 23 can reduce the ability of the blade tail 23 to restrain the outflowing airflow, reducing friction between the outflowing airflow and the blade tail 23, improving the air discharge efficiency of the blade tail 23 and reducing the aerodynamic noise of the blade tail 23.

[0203] The length between the blade tip 22 and the blade tail 23 is not limited thereto. Depending on the specific application scenario, in some embodiments, the length of the blade tip 22 can be the same as the length of the blade tail 23 or the length of the blade tip 22 can be less than the length of the blade tail 23.

[0204] In some embodiments, at least one arc-shaped notch 231 is provided at the blade tail 23. When the fan blades rotate, the internal airflow will rotate synchronously with the fan blades to generate a rotating airflow. Between adjacent blades 2, after the wind is discharged from the blade tail 23 of the front blade 2, the rotating airflow will move obliquely according to inertia, and the inclined airflow will collide with the airflow flowing out of the rear blade 2, and the airflows with fixed directions will generate a vortex after intersecting, affecting the air outlet efficiency of the fan blades. Providing an arc-shaped notch 231 at the blade tail 23 can divert the airflow flowing out of the blade tail 23 of each blade 2 into multiple airflows, and the energy of each airflow is reduced, thereby avoiding the energy and route of the airflow flowing out of the blade tail 23 being too concentrated, and colliding with the airflow flowing out of the blade tail 23 of the rear blade 2 or forming a vortex, thereby improving the air outlet efficiency of the fan blades and reducing the aerodynamic wind noise of the fan blades.

[0205] In this embodiment, there are two arc-shaped notches 231 at the blade tail 23. However, the number of arc-shaped notches 231 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of arc-shaped notches 231 can be (but not limited to): 2, 3, 4, 5, or more.

[0206] The curved notch 231 has a smooth, rounded surface, creating minimal resistance to airflow. Therefore, the use of the curved notch 231 improves the airflow efficiency of the blade tail 23. Furthermore, the symmetry of the two sides of the curved notch 231 along the same linear dimension prevents vibration of the blade 2 caused by inconsistent airflow velocities on the left and right sides after pressure relief, thereby improving the stability of the fan blade rotation and reducing aerodynamic noise.

[0207] The notch at the blade tail 23 is not limited thereto. Depending on the specific application scenario, in some embodiments, the notch of the blade tail 23 has a shape (but not limited to): wedge-shaped, quadrilateral, other polygonal, or heart-shaped.

[0208] In some embodiments, the connection between the curved portion 241 and the blade edge 21 is configured to form an acute angle. The sharp edge formed by the curved portion 241 and the blade edge 21 at the acute angle can make the structure of the sharp edge more prominent, thereby improving the wind-cutting effect. Furthermore, the curved portion 241 can guide the airflow, causing it to move along the curved portion 241 toward the hub 1, thereby improving the fan blade's ability to gather the incoming airflow and further concentrating the airflow.

[0209] In some embodiments, when two or more arcuate notches 231 are provided at the blade tail 23, an arcuate protrusion 232 is provided between two adjacent arcuate notches 231, with the arcuate protrusion 232 oriented in the opposite direction of the arcuate notches 231. When two or more arcuate notches 231 are provided at the blade tail 23, an arcuate protrusion 232 is provided between two adjacent arcuate notches 231. The provision of the arcuate protrusion 232 can further divert the airflow exiting the blade tail 23, thereby improving the airflow efficiency of the fan blades and reducing aerodynamic wind noise.

[0210] In some embodiments, when two or more arc-shaped notches 231 are provided at the blade tail 23, the area of ​​the arc-shaped notches 231 gradually decreases along the direction from the hub 1 to the blade edge 21. Since, when the fan blades rotate, the wind force of the airflow within the fan blades gradually decreases along the direction from the hub 1 to the blade edge 21, the area of ​​the arc-shaped notches 231 gradually decreases along the direction from the hub 1 to the blade edge 21, so that the larger arc-shaped notches 231 release and decompress strong airflows, and the smaller arc-shaped notches 231 release and decompress weak airflows. This allows different positions of the blade tail 23 to release equivalent pressure and airflow depending on the strength of the airflow at the corresponding positions, thereby achieving balanced airflow at the blade tail 23. Balanced airflow can also avoid local vibration caused by unbalanced airflow at different positions of the blade tail 23, thereby reducing the aerodynamic noise of the fan blades.

[0211] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0212] Example 4

[0213] Please refer to Figures 16 and 17. Figure 16 is a schematic diagram of the three-dimensional structure of the fan blades of this embodiment; Figure 17 is a schematic diagram of the structure of the fan blades of this embodiment from a first perspective.

[0214] As shown in Figures 16 and 17, a fan blade comprises a hub 1, a plurality of blades 2, and a fan cover 3. The hub 1 is connected to the fan motor; the plurality of blades 2 are arranged around the outer surface of the hub 1; the fan cover 3 covers the plurality of blades 2, and the blade edges 21 of the plurality of blades 2 are connected to the fan cover 3.

[0215] In this embodiment, the overall shape of the wheel hub 1 is configured as a truncated cone. However, the overall shape of the wheel hub 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the overall shape of the wheel hub 1 can be configured as a cone, bullet, hemispherical, cylindrical, etc.

[0216] The number of blades 2 in this embodiment is 9, but the number of blades 2 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of blades 2 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

[0217] In this embodiment, the inner surface of the fan cover 3 is connected to the blade edge 21 of the blade 2. The connection between the blade edge 21 and the inner surface of the fan cover 3 is achieved by heat fusion. One heat fusion process that can be used is ultrasonic heat fusion. However, the connection between the fan cover 3 and the blade edge 21 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection between the blade edge 21 and the inner surface of the fan cover 3 is achieved by (but not limited to) gluing, welding, snap-fitting, slot connection, etc.

[0218] In the above embodiment, a fan cover 3 is provided, and the fan cover 3 is provided on the fan blades 2, and the blade edge 21 of the fan blades 2 is connected to the fan cover 3. The provision of the fan cover 3 forms a side-enclosed air duct structure between the hub 1 and the fan cover 3. This structure enables the side walls of the fan cover 3 to block and offset the centrifugal force received by the airflow when the fan blades push the airflow to rotate, thereby preventing the airflow flowing through the fan blades from overflowing under the action of the centrifugal force, thereby improving the air outlet efficiency and air volume of the fan blades. At the same time, since the overflow channel of the fan blades is restricted by the fan cover 3, the rotating overflow airflow cannot form an airflow vortex that affects the rotation of the fan blades, thereby avoiding the aerodynamic noise formed by the airflow vortex, and can greatly reduce the aerodynamic noise of the fan blades. Furthermore, due to the covering design of the fan cover 3, the blade edge 21 of the fan blade does not need to rub and collide with the airflow inside the fan blade, which reduces the rotation resistance of the fan blade, makes the rotation efficiency of the fan blade higher, and can also avoid the aerodynamic noise generated by the friction between the blade edge 21 and the airflow, thereby further reducing the aerodynamic noise of the fan blade.

[0219] In some embodiments, each of the multiple blades 2 is bent and extended from the top end 11 of the hub 1 to the side edge position 12 along the surface of the hub 1, and each blade 2 is in a twisted shape. During the rotation of the fan blades 2, the blades 2 push the airflow to rotate. Therefore, the airflow movement path in the fan blades is curved, and each blade 2 is bent and extended from the top end 11 of the hub 1 to the side edge position 12, which can make the shape of the blade 2 fit the curved path of the airflow movement, so that the air pushing efficiency and air guiding efficiency of the fan blades are significantly improved. When the fan blades rotate, the effect of each position of the blade 2 on the airflow is different. For example, at the tip 22 position, the main function of the blade 2 is to cut the wind, at the tip 22 and the tail 23 position, it is used to guide the wind, and at the tail 23 position, it is mainly used to discharge the wind. Since each position of blade 2 has a different function, the shape of blade 2 at each position is also different. For example, at the tip 22 position, blade 2 is required to point in the direction of rotation of the fan blade to facilitate cutting the wind; between the tip 22 and the tail 23, the vertical distance between blade 2 and hub 1 needs to be larger to facilitate receiving and intercepting more airflow; and at the tail 23, blade 2 needs to extend in the opposite direction of the fan blade rotation direction D1 to reduce the friction between blade 2 and the outflowing airflow, thereby reducing the aerodynamic wind noise and rotational resistance of the fan blade. The twisted shape of blade 2 can meet the actual use requirements of different positions, improve the air outlet efficiency of the fan blade, and reduce the aerodynamic wind noise of the fan blade.

[0220] The hub 1 is constructed in a conical or truncated cone shape. The fan cover 3 is provided with a first opening 31 and a second opening 32 along the air inlet direction D2 of the fan blades, and the opening area of ​​the second opening 32 is larger than the opening area of ​​the first opening 31. The hub 1 is constructed in a conical or truncated cone shape. The shape of the hub 1 can make the cross-section of one end of the hub 1 smaller than that of the other end. Since the surface of the hub 1 on the smaller side has a smaller cross-section, there is more space for arranging the blades 2, so that the area of ​​the blades 2 used for cutting the wind is larger and the wind cutting performance is better. The first opening 31 and the second opening 32 provided on the fan cover 3 correspond to the air inlet and the air outlet of the fan blades respectively; the opening area of ​​the first opening 31 is smaller than the opening area of ​​the second opening 32, so that the speed of the airflow entering the fan blades is limited and relatively small, the airflow is easier to control, and it is not easy to generate airflow vortexes, which plays a role in rectifying the airflow entering the fan blades, making the airflow circulation in the fan blades more efficient. The opening area of ​​the second opening 32 is larger than the opening area of ​​the first opening 31 , which can make the air flow out more quickly, facilitate the pressure release of the air flow out, and reduce the aerodynamic noise of the fan blade outlet.

[0221] Please refer to FIG18 , which is a schematic cross-sectional view of the fan blades of this embodiment.

[0222] As shown in FIG18 , in some embodiments, the fan cover 3 includes an air inlet ring 33 and an air guide cover 34 . The air inlet ring 33 is connected to the air guide cover 34 . The first opening 31 is provided on the air inlet ring 33 , and the second opening 32 is provided on the air guide cover 34 .

[0223] The air inlet ring 33 and the air deflector 34 are manufactured using an integrated molding process. Therefore, in this embodiment, the connection between the air inlet ring 33 and the air deflector 34 includes a connection relationship formed using the integrated molding process. However, the connection method between the air inlet ring 33 and the air deflector 34 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection method between the air inlet ring 33 and the air deflector 34 also includes (but is not limited to): adhesive connection, hot melt connection, welding, plug-in connection, or clip-on connection.

[0224] In some embodiments, the thickness of the air inlet ring 33 gradually increases in a direction opposite to the air inlet direction D2 of the fan blades. As the fan blades rotate, they drive the airflow flowing through them to rotate and discharge. However, the rotation of the fan blades also causes a small amount of airflow entering them to disperse, generating turbulence. When the turbulent flow is directed in the opposite direction of the air inlet direction D2 of the fan blades, the fan airflow generates a reverse airflow, which interferes with the normal air intake of the fan blades and reduces the air intake efficiency of the fan blades. The thickness of the air inlet ring 33 gradually increases in a direction opposite to the air inlet direction D2 of the fan blades, which can intercept the reverse airflow and improve the air intake efficiency of the fan blades.

[0225] In some embodiments, the thickness of the air inlet ring 33 gradually increases to a maximum value and then gradually decreases in the direction opposite to the air inlet direction D2 of the fan blades. This structure can also intercept the reverse airflow of the fan blades. At the same time, in the direction opposite to the air inlet direction D2 of the fan blades, the thickness of the air inlet ring 33 gradually increases to a maximum value and then gradually decreases, which can increase the opening area of ​​the outermost opening of the air inlet ring 33, increase the air inlet volume of the fan blades, and further improve the air inlet efficiency of the fan blades.

[0226] In some embodiments, the outer surface of the air guide 34 is raised at a position adjacent to the second opening 32 to form an annular baffle 35. When the fan blades rotate, a negative pressure wind zone will be formed at the position of the second opening 32 of the fan cover 3. After the negative pressure wind zone is formed, the airflow around the fan cover 3 will also flow from the first opening 31 to the second opening 32 along the surface of the fan cover 3, forming an external airflow. The airflow formed by the external airflow will intersect with the airflow of the fan blades at the second opening 32. After the two airflows with different flow rates intersect here, an airflow vortex will be generated, thereby reducing the air outlet efficiency of the fan blades. The setting of the annular baffle 35 can block the external airflow from flowing toward the second opening 32, reduce the kinetic energy of the external airflow, and reduce the probability of the airflow intersecting to form a vortex, thereby improving the air outlet efficiency of the fan blades.

[0227] Furthermore, when the fan blades in this embodiment are assembled into the fan, the airflow flowing out of the fan blades needs to flow a certain distance inside the fan housing before it can flow out of the fan outlet. In this process, the airflow flowing along the outlet direction may be blocked by the inner wall of the fan housing or affected by the size of the fan outlet. The return airflow will flow along the surface of the fan cover 3 from the second opening 32 to the first opening 31. At this time, the two airflows on the surface of the fan cover 3 with opposite directions will intersect, generating an airflow vortex, thereby affecting the air intake and outlet efficiency of the fan blades. The annular baffle 35 can also block the flow of the return airflow, reduce the energy of the return airflow and the external airflow, reduce the probability and energy of the two forming an airflow vortex, and improve the air intake and outlet efficiency of the fan blades. Therefore, it can be seen that the annular baffle 35 can block the intersection of airflows in two opposite directions.

[0228] Please refer to Figures 19 and 20. Figure 19 is a schematic structural diagram of the hub and blades of this embodiment; Figure 20 is a schematic structural diagram of the hub, blades, directions and schematic angles of this embodiment.

[0229] As shown in FIG. 19 , in some embodiments, each blade 2 of the plurality of blades 2 includes a blade tip 22 , and the direction facing the blade tip 22 is the same as the rotation direction D1 of the fan blade.

[0230] The orientation of the blade tip 22 is the same as the rotation direction D1 of the fan blade. The orientation of the blade tip 22 enables the blade tip 22 to form a "shovel" posture with the airflow. In this posture, the blade tip 22 can more easily cut the airflow and facilitate the cut airflow to enter the interior of the fan blade along the guidance of the blade tip 22. Therefore, the orientation of the blade tip 22 can increase the airflow entering the fan blade and reduce wind resistance and aerodynamic noise when the fan blade rotates.

[0231] In some embodiments, each blade 2 of the plurality of blades 2 includes a blade tip 22 , and an angle θ1 between an extension line L1 of a pointing direction of the blade tip 22 and a horizontal direction H1 is an acute angle.

[0232] In this embodiment, the orientation of the blade tip 22 refers to the orientation of the blade tip 22 relative to the horizontal direction H1 , and the direction of the blade tip 22 refers to the direction in which the end of the blade tip 22 points.

[0233] The angle θ1 between the extension line L1 of the direction in which the blade tip 22 points and the horizontal direction H1 is an acute angle, which can enable the blade tip 22 to form a "shovel" posture with the contacting airflow. In this posture, the angle between the blade tip 22 and the cut airflow is an acute angle θ1, which can cut the airflow more conveniently and labor-savingly, reduce the airflow resistance of the fan blades, and improve the rotation efficiency of the fan blades.

[0234] In some embodiments, a cutting wind bevel 24 is provided at the position of the blade tip 22, and the cutting wind bevel 24 extends in the opposite direction of the rotation direction D1 of the fan blade. The end of the cutting wind bevel 24 is more pointed, which enables the fan blade to better cut the airflow when the fan blade rotates, reducing the resistance of the fan blade during the rotation process, and making the rotation efficiency of the fan blade higher. At the same time, because the cutting wind bevel 24 extends in the opposite direction of the rotation direction D1 of the fan blade, the blade 2 can better guide the airflow flowing through the surface of the fan blade, so that the airflow is separated from the blade 2 of the fan blade at a larger angle, reducing the noise generated by the side and the airflow.

[0235] The position of the blade tip 22 is not limited to being provided with the wind-cutting inclined surface 24 . Depending on the specific application scenario, in some embodiments, the position of the blade tip 22 can be a rounded blunt structure or a prismatic structure.

[0236] In some embodiments, the wind-cutting slope 24 includes: a curved portion 241 and a linear portion 242 , one end of the linear portion 242 is connected to the surface of the hub 1 , the other end of the linear portion 242 is connected to the curved portion 241 , and the other end of the curved portion 241 is connected to the blade edge 21 .

[0237] In some embodiments, the angle θ2 between the blade tip 22 and the blade edge 21 is acute. The configuration of the blade tip 22 and blade edge 21 allows the outermost end of the blade tip 22 to be raised to form a sharp point. This acute angle allows the blade tip 22 to cut through the airflow, gradually increasing its contact area as the fan blade rotates. This allows the fan blade to cut through the airflow more easily, reduces wind resistance, and improves the fan blade's rotational efficiency.

[0238] The angle between the blade tip 22 and the blade edge 21 is not limited thereto. Depending on the specific application scenario, in some embodiments, the angle between the blade tip 22 and the blade edge 21 can be a right angle or an obtuse angle.

[0239] In some embodiments, each blade 2 of the plurality of blades 2 includes a blade tail 23 , which bends and extends in a direction opposite to the rotation direction D1 of the fan blade.

[0240] Due to the interaction of forces, when the fan blades rotate along their rotational direction D1, the airflow flowing through the fan blades tends to move in the opposite direction of the fan blades' rotational direction. When the airflow flows along the shape of blade 2, the blade tail 23 bends and extends in the opposite direction of the fan blades' rotational direction D1. This curved structure conforms to the flow trend of the airflow within the fan blades, making the blades 2 more smoothly restrain the airflow and improving the fan's air output efficiency. At the same time, because the curvature of the blade tail 23 is consistent with the flow trend of the airflow, it can reduce the friction between the blade tail 23 and the airflow when the airflow flows out of the business, thereby reducing the aerodynamic noise generated by the airflow at the blade tail 23.

[0241] In some embodiments, the wind-cutting slope 24 comprises a curved portion 241 and a linear portion 242. One end of the linear portion 242 is connected to the surface of the hub 1, the other end of the linear portion 242 is connected to the curved portion 241, and the other end of the curved portion 241 is connected to the blade edge 21. The outer portion of the wind-cutting slope 24 is configured as the curved portion 241. As the blade 2 rotates with the hub 1, the contact surface between the curved portion 241 and the airflow gradually increases, and the curved portion 241 located on the outer side has a greater linear velocity. Therefore, the curved portion 241 can better cut the airflow, increasing the wind-cutting capability of the blade tip 22. Furthermore, because the curved portion 241 contacts the airflow at different locations in a gradual and graded manner, it reduces airflow resistance and aerodynamic noise generated by the fan blades during rotation. The linear portion 242, connected to the curved portion 241, is located on the inner side of the blade tip 22. Its linear velocity during rotation is lower than that of the curved portion 241, thus experiencing less wind resistance. The straight structure of the linear portion 242 enables the linear portion 242 to contact the airflow synchronously, thereby increasing the cutting area of ​​the cutting slope 24 , so that the cutting slope 24 can increase the cutting efficiency through the curved portion 241 and increase the cutting volume through the linear portion 242 .

[0242] In some embodiments, the length of the blade tip 22 is greater than the length of the blade tail 23. The blade tip 22 is used to cut the wind during the rotation of the fan blade. Increasing the length of the blade tip 22 can increase the wind cutting area of ​​the blade tip 22 and improve the air intake efficiency of the blade tip 22. The blade tail 23 is used to discharge air. The smaller width of the blade tail 23 can reduce the ability of the blade tail 23 to restrain the outflowing airflow, reduce the friction between the outflowing airflow and the blade tail 23, improve the air discharge efficiency of the blade tail 23, and reduce the aerodynamic noise of the blade tail 23. At the same time, since the area of ​​the air inlet side of the fan blade is smaller than the area of ​​the air outlet side, that is, the opening area of ​​the first opening 31 is smaller than the opening area of ​​the second opening 32, the air outlet area is larger than the air inlet area. The length of the blade tip 22 is greater than the length of the blade tail 23, which can increase the air intake volume, balance the wind pressure on both sides, avoid airflow loss caused by a large difference in wind pressure on both sides of the fan blade, and improve the working efficiency of the fan blade.

[0243] The length between the blade tip 22 and the blade tail 23 is not limited thereto. Depending on the specific application scenario, in some embodiments, the length of the blade tip 22 can be the same as the length of the blade tail 23 or the length of the blade tip 22 can be less than the length of the blade tail 23.

[0244] In some embodiments, at least one arc-shaped notch 231 is provided at the blade tail 23. When the fan blades rotate, the internal airflow will rotate synchronously with the fan blades to generate a rotating airflow. Between adjacent blades 2, after the wind is discharged from the blade tail 23 of the front blade 2, the rotating airflow will move obliquely according to inertia, and the inclined airflow will collide with the airflow flowing out of the rear blade 2, and the airflows with fixed directions will generate a vortex after intersecting, affecting the air outlet efficiency of the fan blades. Providing an arc-shaped notch 231 at the blade tail 23 can divert the airflow flowing out of the blade tail 23 of each blade 2 into multiple airflows, and the energy of each airflow is reduced, thereby avoiding the energy and route of the airflow flowing out of the blade tail 23 being too concentrated, and colliding with the airflow flowing out of the blade tail 23 of the rear blade 2 or forming a vortex, thereby improving the air outlet efficiency of the fan blades and reducing the aerodynamic wind noise of the fan blades.

[0245] In this embodiment, there are two arc-shaped notches 231 at the blade tail 23. However, the number of arc-shaped notches 231 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of arc-shaped notches 231 can be (but not limited to): 2, 3, 4, 5, or more.

[0246] The curved notch 231 has a smooth, rounded surface, creating minimal resistance to airflow. Therefore, the use of the curved notch 231 improves the airflow efficiency of the blade tail 23. Furthermore, the symmetry of the two sides of the curved notch 231 along the same linear dimension prevents vibration of the blade 2 caused by inconsistent airflow velocities on the left and right sides after pressure relief, thereby improving the stability of the fan blade rotation and reducing aerodynamic noise.

[0247] The notch at the blade tail 23 is not limited thereto. Depending on the specific application scenario, in some embodiments, the notch of the blade tail 23 has a shape (but not limited to): wedge-shaped, quadrilateral, other polygonal, or heart-shaped.

[0248] In some embodiments, the connection between the curved portion 241 and the blade edge 21 is configured to form an acute angle. The sharp edge formed by the curved portion 241 and the blade edge 21 at the acute angle can make the structure of the sharp edge more prominent, thereby improving the wind-cutting effect. Furthermore, the curved portion 241 can guide the airflow, causing it to move along the curved portion 241 toward the hub 1, thereby improving the fan blade's ability to gather the incoming airflow and further concentrating the airflow.

[0249] In some embodiments, when two or more arcuate notches 231 are provided at the blade tail 23, an arcuate protrusion 232 is provided between two adjacent arcuate notches 231, with the arcuate protrusion 232 oriented in the opposite direction of the arcuate notches 231. When two or more arcuate notches 231 are provided at the blade tail 23, an arcuate protrusion 232 is provided between two adjacent arcuate notches 231. The provision of the arcuate protrusion 232 can further divert the airflow exiting the blade tail 23, thereby improving the airflow efficiency of the fan blades and reducing aerodynamic wind noise.

[0250] In some embodiments, when two or more arc-shaped notches 231 are provided at the blade tail 23, the area of ​​the arc-shaped notches 231 gradually decreases along the direction from the hub 1 to the fan cover 3. Since, when the fan blades rotate, the wind force of the airflow within the fan blades gradually decreases along the direction from the hub 1 to the fan cover 3, the area of ​​the arc-shaped notches 231 gradually decreases along the direction from the hub 1 to the fan cover 3, so that the larger arc-shaped notches 231 release and decompress strong airflows, and the smaller arc-shaped notches 231 release and decompress weak airflows. This allows different positions of the blade tail 23 to perform equivalent pressure relief and airflow release according to the strength of the airflow at the corresponding positions, thereby achieving balanced airflow at the blade tail 23. Balanced airflow can also avoid local vibration caused by unbalanced airflow at different positions of the blade tail 23, and thus can also reduce the aerodynamic noise of the fan blades.

[0251] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0252] Example 5

[0253] Referring to Figures 21-25 , this embodiment relates to a fan comprising: a fan device 1, an oscillating device 2, a base 3, a connecting assembly 4, a rechargeable battery 5, and a control circuit board 6. Specifically, the fan device 1 is connected to the oscillating device 2 via the connecting assembly 4, the bottom of the oscillating device 2 is connected to the base 3, and the rechargeable battery 5 and control circuit board 6 are both disposed within the oscillating device 2.

[0254] It should be noted that a rechargeable battery 5 is connected to the fan device 1 and the oscillating device 2, thereby providing power to the fan device 1 and the oscillating device 2. The rechargeable battery 5 is also connected to a control circuit board 6, enabling the control circuit board 6 to control the activation and deactivation of the fan device 1 and the oscillating device 2 to oscillate and sweep air or to deliver air at a specific location. In this embodiment, the fan device 1 is conventional and will not be described in detail here.

[0255] Please refer to FIG. 23 to FIG. 27 . In one embodiment, the oscillating device 2 includes a support column 21 , a fixing assembly 22 , a rotating bracket 23 , a transmission member 24 and a rotation source 25 .

[0256] Among them, the support column 21 has an installation cavity 210, and a partition 211 is provided in the installation cavity 210. The installation cavity 210 is divided by the partition 211 to form an assembly compartment 2101 and a battery compartment 2102, and the rechargeable battery 5 and the control circuit board 6 are installed in the battery compartment 2102. The fixed component 22 is arranged in the assembly compartment 2101 and is connected to the partition 211. The rotating bracket 23 is movably assembled in the assembly compartment 2101. The rotating bracket 23 is located on the side of the fixed component 22 away from the partition 21, and a portion of the fixed component 22 is passed through. The transmission member 24 is supported on the partition 211 and engaged with the fixed component 22. The rotation source 25 is fixedly mounted on the rotating bracket 23, and the power output shaft is connected to the transmission member 24. The rotation source 25 drives the transmission member 24 to rotate, so that the transmission member 24 moves around the fixed component 22, driving the power source 25 and the rotating bracket 23 to rotate relative to the support column 21.

[0257] It should be noted that the control circuit board 6 is provided with a plurality of control buttons 61 for controlling the air volume, activation and deactivation of the fan device 1, and activation and deactivation of the oscillating device 2. The inner sidewall of the battery compartment 2102 is provided with a plurality of corresponding mounting openings, and the plurality of control buttons 61 are correspondingly mounted in the plurality of mounting openings.

[0258] 27 to 29 , in one embodiment, a mounting groove 2110 is provided on the partition 211 . The fixing assembly 22 includes a central gear 221 , a locking member 222 and a fixing ring 223 .

[0259] Specifically, the central gear 221 is disposed on the side of the partition 211 near the rotating bracket 23 and engages with the transmission member 24. The locking member 222 is disposed within the mounting slot 2110. A portion of the locking member 222 can extend out of the mounting slot 2110 to engage with the central gear 221, thereby locking the central gear 221. The fixing ring 223 is fixedly assembled with the partition 211 and is used to restrain the locking member 222.

[0260] It should be noted that, in this embodiment, the fixing member 223 is plug-fitted to the partition 211. The fixing ring 223 has a blocking portion 2231, which is used to close the installation groove 2110, thereby preventing the locking member 222 from falling out of the installation groove 2110, ensuring the normal use of the locking member 222.

[0261] Please continue to refer to Figures 27 to 29. In one embodiment, the mounting groove 2110 is provided with an opening on one side close to the center gear 221. The locking member 222 includes a locking head 2221 and an elastic member 2222. The head end of the locking head 2221 can extend out of the opening or retract into the mounting groove 2110. One end of the elastic member 2222 is connected to the side wall of the mounting groove 2110, and the other end is connected to the locking head 2221. The elastic member 2222 is used to push the head end of the locking head 2221 out of the opening, thereby locking the center gear 221. In this embodiment, the elastic member 2222 is a spring. In other embodiments, the elastic member 2222 can also be a shrapnel, a spring block or other components that store and release elastic potential energy.

[0262] It should be noted that when the rotating bracket 23 is unable to rotate due to external forces, the rotating source 25 drives the transmission member 24 to rotate and drives the central gear 221 to rotate. The rotation of the central gear 221 squeezes the locking head 2221, thereby retracting the head end of the locking head 2221 into the mounting slot 2110. The locking member 222 configured in this way will not cause damage to the oscillating device 2 even when the rotating bracket 23 is unable to rotate. This not only avoids damage to the fixing assembly 22, but also prevents the rotating source 25 from burning out due to the oscillating device 2 becoming stuck, greatly improving the service life of the oscillating device 2 and the user experience.

[0263] Continuing with Figures 27 to 29 , in one embodiment, first balls 2211 are provided on the end surfaces of the central gear 221 that contact the partition plate 211 and the rotating bracket 23. The provision of the first balls 2211 converts the sliding friction between the central gear 221 and the partition plate 211, and between the central gear 221 and the rotating bracket 23, into rolling friction. This not only improves the smoothness of the rotation of the central gear 221, but also prevents wear on the central gear 221, the partition plate 211, or the rotating bracket 23, further enhancing the smoothness of use and the service life of the fixing assembly 22.

[0264] In this embodiment, five first balls 2211 are disposed on the end surface of the center gear 221 that contacts the partition plate 211. Five first balls 2211 are also disposed on the end surface of the center gear 221 that contacts the rotating bracket 23. It will be appreciated that the number of first balls 2211 is limited only to sufficient to convert the sliding friction between the center gear 221 and the partition plate 211, and between the center gear 221 and the rotating bracket 23, into rolling friction.

[0265] Referring back to Figures 23 to 27 , in one embodiment, the rotating bracket 23 includes a mounting portion 231 and a rotating shaft portion 232. The mounting portion 231 is connected to the rotating shaft portion 232. The mounting portion 231 defines a receiving cavity 2310, within which the main body of the rotating source 25 is mounted. The rotating shaft portion 232 extends away from the mounting portion 231, passes through the central gear 221 and the partition 211, and extends into the battery compartment 2102.

[0266] It should be noted that, in this embodiment, a through hole is provided at the bottom of the accommodating chamber 2310, and the power output shaft of the rotating source 25 is connected to the transmission member 24 through the through hole, and the main body of the rotating source 25 is fixedly installed at the bottom of the accommodating chamber 2310 by fastening screws.

[0267] In one embodiment, the transmission member 24 is a transmission gear, and second balls 241 are provided on the upper and lower end surfaces of the transmission member 24 along the circumferential direction (see Figure 28). The setting of the second balls 241 converts the sliding friction between the transmission member 24 and the rotating bracket 23 and the sliding friction between the transmission member 24 and the partition 211 into rolling friction, thereby reducing the rotation resistance of the transmission member 24 and ensuring the smoothness and stability of the rotation of the shaking head device 2.

[0268] Referring to Figures 27, 30, and 31, in one embodiment, a limiting portion 2112 is provided on a side of the partition plate 211 away from the fixing assembly 22. The oscillating device 2 also includes a limiting member 26, which is located within the battery compartment 2102 and connected to a side of the rotating shaft 232 away from the mounting portion 231. The limiting member 26 is configured to cooperate with the limiting portion 2112 to limit the rotation angle of the rotating bracket 23.

[0269] In one embodiment, the limiting portion 2112 includes a first limiting end 21121 and a second limiting end 21122. The space between the first limiting end 21121 and the second limiting end 21122 provides a space for the limiting member 26 to rotate. Specifically, the limiting member 26 is fixedly connected to the rotating shaft portion 232, so that the limiting member 26 can rotate synchronously with the rotating bracket 23. A limiting protrusion 261 is provided on the side wall of the limiting member 26, and the limiting protrusion 261 is located between the first limiting end 21121 and the second limiting end 21122, thereby limiting the rotation angle of the limiting member 26 by limiting the limiting portion 2112, thereby limiting the rotation of the rotating bracket 23.

[0270] In one embodiment, the position-limiting member 26 is fixedly assembled to the rotating shaft portion 232 via a set screw. Specifically, a threaded hole 2321 is provided on the end surface of the rotating shaft portion 232 near the position-limiting member 26. A mounting hole 260 is provided on the position-limiting member 26 at a position corresponding to the threaded hole 2321. The set screw passes through the mounting hole 260 and is assembled with the threaded hole 2321, thereby achieving fixed assembly between the position-limiting member 26 and the rotating shaft portion 232. In this embodiment, two set screws are provided, corresponding to two threaded holes 2321 and two mounting holes 260. In other embodiments, the number of set screws can be determined as needed, as long as the position-limiting member 26 and the rotating shaft portion 232 are fixedly assembled.

[0271] Continuing to refer to Figures 27, 30, and 31, in one embodiment, a positioning post 2322 is further provided on the end surface of the rotating shaft portion 232 near the stopper 26. Correspondingly, a positioning hole 262 is provided on the stopper 26 to mate with the positioning post 2322. Before the rotating shaft portion 232 and the stopper 26 are fixed by screws, the positioning post 2322 and the positioning hole 262 can be pre-assembled to ensure that the mounting hole 260 is aligned with the threaded hole 2321, thereby facilitating the installation of the fastening screws and, in turn, facilitating the fixed assembly between the rotating shaft portion 232 and the stopper 26.

[0272] It should be noted that, in this embodiment, a bearing 27 is provided between the limit member 26 and the partition 211. Specifically, the bearing 27 is sleeved on the rotating shaft portion 232 and is abutted against the end face of the partition 211 through the limit member 26. In this way, not only can the tightness of the assembly between the rotating bracket 23, the limit member 26 and the partition 211 be ensured, but also the limit member 26 can be prevented from directly contacting the partition 211, thereby reducing the rotation resistance of the rotating bracket 23 and more effectively ensuring the stability and smoothness of the shaking head device 2 during rotation.

[0273] In one embodiment, a ball washer 28 is disposed between the mounting portion 231 and the fixing ring 223. Specifically, the ball washer 28 includes a plurality of balls, and portions of the balls are exposed on both the upper and lower end surfaces. This allows the balls to abut against the end surfaces of the mounting portion 231 and the fixing ring 223, thereby converting sliding friction between the mounting portion 231 and the fixing ring 223 into rolling friction. This reduces the rotational resistance of the rotating bracket 23 and further ensures the stability and smoothness of the rotation of the oscillating device 2.

[0274] It should be noted that to ensure that the multiple balls can move along a specific trajectory, a first annular groove 2311 is provided on the end surface of the mounting portion 231 near the fixing ring 223, and a second annular groove 2232 is provided on the end surface of the fixing ring 223 near the mounting portion 231. The multiple balls are partially located in the first annular groove 2311 and partially located in the second annular groove 2232. When the rotating bracket 23 rotates relative to the fixed assembly 22, the multiple balls rotate along the first annular groove 2311 and the second annular groove 2232.

[0275] In one embodiment, the oscillating device 2 further includes an end cap 29 connected to the mounting portion 232. The end cap 29 is used to seal the accommodating chamber 220 and the assembly compartment 2101. Specifically, in this embodiment, three fixing seats are provided within the accommodating chamber 220, and three threaded studs are also provided at corresponding positions on the end cap 29. Fastening screws pass through the fixing seats and threadably engage with the threaded studs, thereby securing the mounting portion 232 to the end cap 29.

[0276] In one embodiment, the fan device 1 is provided with a hinge portion 11, and the connecting assembly 4 includes: a connecting rod 41, a hinge shaft 42, and a blocking cover 43. Specifically, one end of the connecting rod 41 is fixedly assembled with the end cover 29, and the other end is rotatably assembled with the hinge portion 11. The hinge shaft 42 passes through the connecting rod 41 and the hinge portion 11 to achieve rotational assembly between the connecting rod 41 and the hinge portion 11. The blocking cover 43 is connected to the hinge portion 11 and is located at both ends of the hinge shaft 42. The blocking cover 43 is used to cover the ends where the hinge shaft 42 is assembled with the hinge portion 11, thereby improving the overall aesthetics of the connecting assembly 4.

[0277] In one embodiment, the connecting rod 41 is generally L-shaped. The end cap 29 is provided with a mounting groove 291. The fixed end portion of the connecting rod 41 is accommodated within the mounting groove 291 and secured to the bottom of the mounting groove 291 via a set screw. The hinge portion 11 is provided with a hinge groove (not shown in the drawings). The hinged end of the connecting rod 41 is provided with a hinge joint 411. When the connecting rod 41 is assembled with the hinge portion 11, the hinge joint 411 is installed in the hinge groove and is rotated by the hinge shaft 42.

[0278] In this embodiment, a limiting protrusion 4111 is provided on the outer wall of the hinge joint 411, and correspondingly, a limiting structure (not shown in the drawings) adapted to the limiting protrusion 4111 is provided in the hinge groove. The limiting protrusion 4111 and the limiting structure cooperate with each other to limit the up and down rotation angle of the fan device 1.

[0279] Example 6

[0280] As shown in Figure 32, embodiment 1 of the present application provides a fan connection structure, including: a fan cover 1, a base shell 2, and a bracket 3 for connecting the fan cover 1 and the base shell 2; one end of the bracket 3 is set on the base shell 2, and the other end of the bracket 3 penetrates from the outer wall of the fan cover 1 close to the base shell 2, and is rotatably connected to the fan cover 1; a limiting structure for limiting the fan pitch adjustment angle is provided between the bracket 3 and the fan cover 1.

[0281] In the above embodiment, the fan includes a fan head and a base, the fan head includes a fan cover 1 and a fan blade assembly, and the base includes a base shell 2. One end of the bracket 3 is fixedly set on the base shell 2, and the other end of the bracket 3 penetrates from the bottom of the fan cover 1 and is rotatably connected to the fan cover 1, so that the fan head can be pitched relative to the base during use. Since the rotating structure is set at the bottom of the fan cover 1, when the fan head is flipped downward, its rear part will not be restricted by the base and can be flipped downward to a large extent, and can also be flipped upward to a large extent. A limiting structure is set between the bracket 3 and the fan cover 1 to limit the rotation angle of the fan head. The maximum rotation angle of the fan head is 45°, of which the pitch angle of the fan head that can be rotated is 0°-15°, so that the fan head will not be restricted by the base and affect its horizontal rotation.

[0282] As shown in Figures 33 and 34, the surface of the base housing 2 facing the fan housing 1 is an inclined surface; the end of the bracket 3 facing the base housing 2 is positioned corresponding to the inclined surface, and the end of the bracket 3 facing the fan housing 1 extends upward. A first connecting block 31 is provided on the end of the bracket 3 facing the fan housing 1. A second connecting block 11 is provided on the outer wall of the fan housing near the base housing 2. The second connecting block 11 and the base housing 2 can be integrally formed or connected separately. The second connecting block 11 is provided with a first assembly position 111 for inserting the first connecting block 31. A connecting shaft 4 is provided between the first connecting block 31 and the second connecting block 11 for mutual engagement.

[0283] Bracket 3 is divided into two sections. One section extends downward at an angle toward the base housing 2, and the other extends vertically upward toward one end of the fan housing 1. A large rounded corner transitions between the two sections. The first connecting block 31 is a hollow cylindrical block that protrudes from the center of the end of bracket 3. The second connecting block 11 has a recessed portion, designated as the first assembly position 111. After the first connecting block 31 is inserted into the first assembly position 111, the connecting shaft 4 penetrates the first connecting block 31 and the second connecting block 11, forming a rotational connection between the two. The fan housing 1 can be adjusted in pitch relative to bracket 3.

[0284] As shown in Figures 34 and 35 , the second connecting block 11 is provided with second assembly positions 112 located on either side of the first assembly position 111. The connecting shaft 4 comprises a fixed portion 41, a mating portion 42, and a movable portion 43 extending through the mating portion 42. The first connecting block 31 is provided with a through hole 311 for receiving the mating portion 42. The fixed portion 41 and the movable portion 43 are rotatably connected and are respectively disposed on the second assembly positions 112. The connecting shaft 4 is a damping shaft.

[0285] The movable portion 43 and the mating portion 42 are integrally designed, and the movable portion 43 is rotatable relative to the fixed portion 41. The second assembly position 112 has two locations: one that matches the shape of the fixed portion 41. The second assembly position 112 can be either regular or irregular in shape, allowing the fixed portion 41 to drive the second assembly position 112 to rotate. The other location matches the shape of the movable portion 43. The portion of the second assembly position 112 that matches the movable portion 43, as well as the movable portion 43, are both columnar. The fixed portion 41 is secured to the second assembly position 112. The movable portion 43 and the mating portion 42 are driven to rotate by the first connecting block 31.

[0286] Furthermore, by providing a damping shaft, the fan head of the present application can hover at any angle within the set rotation angle range.

[0287] As shown in FIG33 , an end cover 114 is provided on the second assembly position 112 for preventing the connecting shaft 4 from being separated.

[0288] The two ends of the connecting shaft 4 are sealed by end covers 114. Firstly, it can prevent the connecting shaft 4 from being separated from the first connecting block 31 and the second connecting block 11 during use. Secondly, it can prevent dust from entering the connecting shaft 4 and affecting the rotation of the connecting shaft 4. It can also be used to beautify the appearance of the two ends of the connecting shaft 4.

[0289] Optionally, the vertical cross-sectional shapes of the fixing portion 41 , the matching portion 42 and the through hole 311 are all oval; and the vertical cross-sectional shape of the movable portion 43 is circular.

[0290] The shapes of the fixing portion 41 and the matching portion 42 are set to be oval-shaped bodies, which can prevent the fixing portion 41 from rotating relative to the second assembly position 112 or the matching portion 42 from rotating relative to the first connecting block 31 during rotation.

[0291] As shown in Figures 36 and 37, the limiting structure is composed of a limiting block 312 provided on the outer surface of the first connecting block 31 and a limiting groove 113 provided on the inner surface of the second connecting block 11, and the limiting block 312 cooperates with the limiting groove 113.

[0292] The cooperation between the limiting block 312 and the limiting slot 113 is used to limit the pitch adjustment angle of the fan head, thereby preventing the fan from being unable to blow air toward the user due to excessive adjustment of the pitch angle of the fan head.

[0293] As shown in Figures 38 and 39, the surface of the bracket 3 facing the base shell 2 is provided with a first step protrusion 32, and the surface of the base shell 2 facing the fan outer cover 1 is provided with a groove 21, and the groove 21 is provided with a second step protrusion 22 that matches the first step protrusion 32; the first step protrusion 32 and the second step protrusion 22 are connected by screws 23.

[0294] Because the surface of the bracket 3 facing the base housing 2 and the surface of the base housing 2 facing the fan housing 1 are both inclined, the provision of a first stepped protrusion 32 and a second stepped protrusion 22 that cooperate with each other facilitates alignment between the bracket 3 and the base housing 2, allowing the screws 23 to be installed vertically, facilitating fan assembly. Furthermore, the first stepped protrusion 32 and the second stepped protrusion 22 act as reinforcing ribs, further stabilizing the connection between the bracket 3 and the base housing 2. In other embodiments, the bracket 3 and the base housing 2 can also be connected by snapping, plugging, or other methods to achieve a fixed connection between the bracket 3 and the base housing 2.

[0295] In the above embodiment, the number of screws 23 is 3. It can also be other numbers, such as 1, 2, 4, 5, 6, etc., so as to make it stable and economical.

[0296] In some embodiments, the limiting structure is composed of a limiting block provided on the inner surface of the second connecting block and a limiting groove provided on the outer surface of the first connecting block, and the limiting block cooperates with the limiting groove.

[0297] The cooperation between the limit block and the limit slot is used to limit the pitch adjustment angle of the fan head, thereby preventing the fan from being unable to blow air towards the user due to excessive adjustment of the pitch angle of the fan head.

[0298] Example 7

[0299] As shown in Figures 40 to 42, a fan oscillating structure includes: a first housing 1 and a second housing 2 that can rotate relative to the first housing 1; the first housing 1 is provided with a first gear 3 and a rotation feedback member 5 that is elastically resettable relative to the first gear 3; the second housing 2 is provided with a second gear 4 and a drive motor 6 for driving the second gear 4 to rotate; the first gear 3 is meshingly connected to the second gear 4; the second gear 4 can rotate about the first gear 3, or the second gear 4 can drive the first gear 3 to rotate about the axis of the first housing 1. The first gear 3 is coaxial with the first housing 1. In the above-mentioned first housing 1 and second housing 2, the first housing 1 can be the outer shell of the base and the second housing 2 can be the outer shell of the fan head, or the first housing 1 can be the lower shell of the base and the second housing 2 can be the upper shell of the base. However, regardless of the location of the first housing 1 and the second housing 2, the second housing 2 can always rotate relative to the first housing 1. That is, when the second housing 2 rotates relative to the first housing 1, it drives the fan head to rotate together. In this embodiment, the first housing 1 is the lower housing of the base, and the second housing 2 is the upper housing of the base, wherein the second housing 2 is connected to the fan head.

[0300] In the above embodiment, the drive motor 6 is arranged on the second shell 2, and the rotating shaft of the drive motor 6 is connected to the second gear 4, and there is no connection between the second gear 4 and the first shell 1. The above-mentioned second gear 4 can rotate around the first gear 3, or the second gear 4 can drive the first gear 3 to rotate around the axis of the first shell 1. This is the transmission method of the first gear 3 and the second gear 4 in this structure. One is that the first gear 3 does not rotate by itself, and the second gear 4 rotates to rotate around the first gear 3; the other is that the second gear 4 does not rotate by itself to drive the first gear 3 to rotate. For the first transmission method, under the drive of the drive motor 6, the second gear 4 rotates by itself. At this time, the first gear 3 is restricted by the rotating feedback member 5 and cannot rotate by itself. Therefore, when the second gear 4 rotates by itself, it can only rotate around the first gear 3, thereby realizing the shaking function of the fan. For the second transmission mode, the second shell 2 rotates under the action of external force, driving the drive motor 6 and the second gear 4 to rotate together. At this time, the drive motor 6 does not work, so the second gear 4 does not rotate. The elastic force of the rotating feedback member 5 is less than the external force. Therefore, through the meshing connection between the first gear 3 and the second gear 4, the second gear 4 drives the first gear 3 to rotate, and then adjusts the air outlet direction of the fan. In the process of adjusting the air outlet direction of the fan, the rotating feedback member 5 will be squeezed by the first gear 3 to perform an elastic reset movement, providing rotation feedback to the user, so that the user can know the current amplitude of the fan adjustment of the air outlet direction.

[0301] Of the two transmission modes mentioned above, the first is a transmission mode that can only occur when the drive motor 6 is energized. At this time, the fan head automatically starts to rotate back and forth under the drive of the second gear 4; the second transmission mode can occur regardless of whether the drive motor 6 is energized. That is, whether the fan is shaking or not, the user can manually change the air outlet direction of the fan head and achieve corresponding rotation feedback by rotating the feedback member 5 to enhance the user experience. The rotation feedback mentioned above is usually the sound produced by the rotation feedback member 5 when it is working. That is, the user can emit the rotation feedback sound as long as he manually triggers the rotation feedback member 5.

[0302] As shown in Figure 42, the rotation feedback member 5 is composed of a spring 51 and a block 52; one end of the spring 51 rests on the inner wall of the first shell 1, and the other end of the spring 51 rests on the surface of the block 52 facing away from the first gear 3; the block 52 is embedded in any tooth groove of the first gear 3.

[0303] In the above embodiment, when the first gear 3 is not rotating, the spring 51 is not compressed. When the first gear 3 rotates, the clamping block 52 switches from one tooth groove of the first gear 3 to another. During this process, the spring 51 is compressed and generates elastic force, which pushes the clamping block 52 toward the first gear 3. As the first gear 3 rotates continuously, the clamping block 52 performs continuous reciprocating motion relative to the first gear 3.

[0304] In another optional embodiment, the rotation feedback member 5 may be a combination of a spring 51 and a pawl, and the pawl is engaged in the tooth groove of the first gear 3 to limit the first gear 3 .

[0305] As shown in Figures 43 and 44, the first shell 1 is provided with a groove 13 for installing the spring 51 and the block 52, and a gear movable groove 14 for allowing the second gear 4 to move; one end of the spring 51 rests on the inner surface of the groove 13, and the other end of the spring 51 rests on the surface of the block 52 facing away from the first gear 3.

[0306] Specifically, the first housing 1 is provided with a mounting portion 11, with a groove 13 and a gear movable groove 14 located in the direction from the mounting portion 11 toward the second housing 2. In the above embodiment, a portion of the mounting portion 11 is arched, and another portion is the gear movable groove 14. The gear movable groove 14 is used to provide space for the second gear 4 to move within the mounting portion 11. Although the second gear 4 is positioned within the gear movable groove 14, there is no connection or interference between the second gear 4 and the first housing 1. A space for accommodating the first gear 3 is also provided on the outer side of the gear mounting shaft. The groove 13 is located in the middle of the arch and communicates with the space for accommodating the first gear 3. The width of the groove 13 is slightly larger than the maximum width of the block 52, allowing the block 52 to maintain elastic reciprocating motion relative to the first gear 3, but the excessive width does not cause the block 52 to deviate from its direction during reciprocating motion, thereby affecting the normal feedback of the block 52, thereby continuously providing rotational feedback when the user adjusts the airflow direction of the fan.

[0307] As shown in Figures 40 and 44, a shaft sleeve 12 extending toward the second shell 2 is provided in the first shell 1; a protruding shaft 23 passing through the shaft sleeve 12 is provided at one end of the second shell 2 extending toward the first shell 1, and a snap 16 is provided at the end of the protruding shaft 23; the first gear 3 is sleeved on the outside of the shaft sleeve 12.

[0308] Specifically, a sleeve 12 is provided within the mounting portion 11. Sleeve 12 is positioned between groove 13 and the gear mounting slot. The first gear 3 is sleeved on the outside of sleeve 12 and can rotate about it. Because the first gear 3 is coaxially disposed with the first housing 1, sleeve 12 is also coaxially disposed with the first housing 1. A clip 16 is detachably connected to the protruding shaft 23. The clip 16 is located on the side of the mounting portion 11 facing away from the second housing 2. After the protruding shaft 23 penetrates the sleeve 12, the clip 16 is fixedly connected to the protruding shaft 23 with screws, thereby vertically securing the first and second housings 1 and 2 relative to each other.

[0309] As shown in FIG46 , a limit block 161 is provided on the side surface of the buckle 16 , and a stop block 111 cooperating with the limit block 161 is provided in the first shell 1 , and the stop block 111 extends in a direction away from the second shell 2 .

[0310] Specifically, two limit blocks 161 are provided on the side surface of the buckle 16, and there are two stop blocks 111. The two limit blocks 161 and the two stop blocks 111 are not arranged along a straight line, but rather in a fan-shaped arrangement. By setting the limit blocks 161 and the stop blocks 111 in coordination, the fan's swing angle and the adjustment of the airflow direction angle are restricted.

[0311] In a further embodiment, a positioning block is provided on the protruding shaft 23 and a positioning hole is provided on the buckle 16. The cooperation between the positioning block and the positioning hole can prevent the staff from installing the buckle 16 in the wrong direction when installing the buckle 16 and the protruding shaft 23, making it easier for the staff to assemble the fan.

[0312] As shown in Figures 40 and 45, the second shell 2 includes a first connecting part 21 and a second connecting part 22; the drive motor 6 is arranged in a cavity formed by the first connecting part 21 and the second connecting part 22; the rotating shaft of the drive motor 6 passes through the second connecting part 22 and is connected to the second gear 4; the convex shaft 23 is arranged on the second connecting part 22.

[0313] The drive motor 6 is disposed within the space enclosed by the first connecting portion 21 and the second connecting portion 22. The drive motor 6 is fixedly connected to the first connecting portion 21 via screws, and the second connecting portion 22 is also fixedly connected to the first connecting portion 21 via screws. The rotating shaft of the drive motor 6 extends through the second connecting portion 22 and connects to the second gear 4. The cross-section of the rotating shaft of the drive motor 6 is oval. With this structural design, when the second housing 2 is driven to rotate by an external force, the drive motor 6 and the second gear 4 rotate together with the second housing 2, thereby driving the first gear 3 to rotate, thereby adjusting the airflow direction of the fan.

[0314] As shown in Figures 40, 41 and 48, the protruding shaft 23 and the sleeve 12 are connected through the first bearing 15.

[0315] Specifically, the first bearing 15 is a rolling bearing, which can make the cooperation between the protruding shaft 23 and the sleeve 12 smoother. At the same time, the first bearing 15 can keep the protruding shaft 23 always parallel to the axis of the first housing 1.

[0316] As shown in FIG. 40 and FIG. 47 , the first shell 1 and the second shell 2 are connected via a second bearing 17 ; a protrusion 171 is provided on the second bearing 17 ; the protrusion 171 is used to block the opening of the groove 13 .

[0317] A plane bearing, namely a second bearing 17, is provided between the second connecting portion 22 and the mounting portion 11, making the rotation of the second connecting portion 22 more convenient and smooth. The protrusion 171 blocks the opening of the groove 13, preventing the spring 51 and the block 52 from being separated from the groove 13.

[0318] The specific implementation process of the fan shaking structure in this embodiment is as follows: if the fan needs to shake, the drive motor 6 starts to drive the second gear 4 to rotate. At this time, the first gear 3 is restricted by the block 52 and cannot transmit to the second gear 4. The first gear 3 does not rotate, and the second gear 4 rotates around the first gear 3 to achieve the fan shaking. If the air outlet direction of the fan needs to be adjusted, it is only necessary to twist the second shell 2. At this time, the drive motor 6 does not work, and the second gear 4 does not rotate. The second gear 4 drives the first gear 3 to rotate around the axis of the first shell 1 under the drive of the second shell 2, that is, the first gear 3 rotates under the action of the second gear 4, thereby adjusting the air outlet direction of the fan. At this time, the block 52 is squeezed by the first gear 3 and compresses the spring 51, so that the block 52 performs an elastic reset movement relative to the first gear 3, providing rotation feedback to the user.

Claims

1. A fan module, wherein: include: A fan housing, wherein the fan housing is provided with an air inlet structure and an air outlet corresponding to the air inlet structure; A fan assembly, the fan assembly being disposed in the fan housing and being used to push the airflow from the air inlet structure to the air outlet; An air-increasing ring is connected to the fan housing, and a surrounding cover of the air-increasing ring is arranged on the air outlet.

2. The fan module according to claim 1, wherein: The fan housing is connected to a connecting piece, the air outlet is provided on the connecting piece, the fan assembly is connected to the connecting piece, and the air increasing ring is connected to the connecting piece; and / or, The air-increasing ring is provided with a lampshade, and a light-emitting body is provided in the lampshade.

3. The fan module according to claim 2, wherein: The air-increasing ring comprises: a first ring body, an air-increasing disk and a plurality of connecting plates, wherein the air-increasing disk is connected to the connecting member, the plurality of connecting plates are distributed around the circumference of the air-increasing disk, and one end of each of the plurality of connecting plates is connected to the air-increasing disk, and the other end of each of the connecting plates is connected to the first ring body; and / or, The connecting member comprises: a connecting ring, a first cover body and a plurality of air guide plates, wherein the connecting ring is connected to the inner surface of the fan housing, the plurality of air guide plates are distributed around the circumference of the first cover body, and one end of each of the plurality of air guide plates is connected to the first cover body, and the other end of each of the air guide plates is connected to the connecting ring, the fan assembly is connected to the first cover body, and the connecting ring and the first cover body enclose the air outlet, and the air outlet is annular; and / or, The fan housing comprises: a first housing and an air guide cover, the first housing is connected to the air guide cover, the connecting piece is connected to the air guide cover, the fan assembly extends into the air guide cover, the air guide cover is provided with a necking opening, and the fan assembly is arranged between the necking opening and the connecting piece.

4. The fan module according to claim 3, wherein: The air increasing disk is recessed inwardly toward the connecting member to form an arc-shaped surface. Along the air outlet direction of the air outlet, the width of the first ring body is greater than the width of the air increasing disk.

5. The fan module according to claim 3, wherein: In the direction from the air outlet to the air inlet structure, each of the air guide plates is bent and extended along the surface of the first cover body, and the bending direction of each of the air guide plates is opposite to the rotation direction of the fan assembly when it rotates; and / or, A side of the first cover body facing the air-increasing ring is raised to form a connection plate, a side of the connection plate facing the fan assembly is provided with a connection column, and the fan assembly is connected to the connection column; and / or, Along the air outlet direction, the distance between the first cover body and the fan housing gradually decreases, the distance between the first cover body and the connecting ring gradually decreases, and the width of each air guide plate gradually decreases.

6. The fan module according to claim 5, wherein: A side of the connecting disk facing the fan assembly is concave to form a receiving ring, the receiving ring is arranged around the connecting column, and at least a part of the structure of the fan assembly extends into the receiving ring.

7. The fan module according to claim 3, wherein: The air inlet structure comprises a plurality of air inlet holes, wherein the plurality of air inlet holes are provided on a first shell, a filter assembly is arranged in the first shell, and the filter assembly covers the air inlet holes; or There is a gap between the first shell and the end of the air guide cover facing away from the connecting piece, and a reinforcing rib is provided in the gap, one end of the reinforcing rib is connected to the first shell, and the other end of the reinforcing rib is connected to the air guide cover, and one end of the filter element is inserted into the gap and connected to the reinforcing rib.

8. The fan module according to claim 7, wherein: The filter element includes: a first assembly ring, a second assembly ring, a filter ring and a filter plate, the filter ring is connected to the first assembly ring and the second assembly ring, the filter plate is connected to the first assembly ring, the second assembly ring is arranged in the gap and connected to the reinforcing rib, and the first assembly ring is connected to the bottom surface of the first shell.

9. The fan module according to claim 8, wherein: The first assembly ring is provided with a first assembly groove and an annular storage cavity, the first assembly groove is arranged around the annular storage cavity, the second assembly ring is provided with a second assembly groove, one end of the filter ring is inserted into the first assembly groove, the other end of the filter ring is inserted into the second assembly groove, and the filter plate is arranged in the annular storage cavity.

10. The fan module according to claim 1, wherein: The fan assembly includes a fan blade, and the fan blade includes: a wheel hub, the wheel hub being connected to the fan motor; A plurality of blades, the plurality of blades are disposed on an outer surface of the hub in a surrounding manner; Each of the plurality of blades is bent and extended along the surface of the hub from the top end of the hub to the edge position of the side, and each of the blades is in a twisted shape.

11. The fan module according to claim 10, wherein: The hub is configured in a conical shape or a truncated cone shape.

12. The fan module according to claim 10, wherein: Each of the plurality of blades comprises: a blade tip, the direction in which the blade tip faces is the same as the rotation direction of the fan blade; and / or, Each of the plurality of blades comprises a blade tip, and an angle between an extension line of a direction in which the blade tip points and a horizontal direction is an acute angle.

13. The fan module according to claim 12, wherein: A wind-cutting inclined plane is arranged at the position of the blade tip, and the wind-cutting inclined plane extends in the opposite direction to the rotation direction of the fan blade.

14. The fan module according to claim 13, wherein: The angle between the blade tip and the blade edge is an acute angle; and / or, Each of the plurality of blades includes a blade tail, and the blade tail is bent and extends in a direction opposite to a rotation direction of the fan blade.

15. The fan module according to claim 14, wherein: The wind-cutting slope comprises: a curved portion and a linear portion, one end of the linear portion is connected to the hub surface, the other end of the linear portion is connected to the curved portion, and the other end of the curved portion is connected to the blade edge; and / or, The length of the blade tip is greater than the length of the blade tail; and / or, At least one arc-shaped notch is arranged at the blade tail.

16. The fan module according to claim 15, wherein: The connection position between the curved portion and the blade edge forms an acute angle.

17. The fan module according to claim 15, wherein: When two or more arc-shaped notches are provided at the blade tail, an arc-shaped protrusion is provided between two adjacent arc-shaped notches, and the arc-shaped protrusion is in the opposite direction to the arc-shaped notch.

18. The fan module according to claim 15, wherein: When two or more arc-shaped notches are provided at the blade tail, the area of ​​the arc-shaped notches gradually decreases along the direction from the hub to the blade edge.

Images