Fan module and blowing device

Abstract

The invention discloses a fan module and a blowing device. The fan module comprises a shell; the fan motor is arranged in the shell body; the fan motor is connected with the fan blade through a rotating shaft, a first balance ring part and a second balance ring part are arranged on the fan blade, and the diameter of the first balance ring part is larger than that of the second balance ring part. The fan motor and the fan blades of the fan module are arranged in the shell, the first balance ring part and the second balance ring part are arranged on the fan blades, and the corresponding positions of the first balance ring part and the second balance ring part are filled with the balance soil, so that the mass distribution of the fan blades is balanced, and the rotating efficiency and the stability of the fan blades are improved.

Description

Technical Field

[0001] The present application relates to the field of fans, and in particular to a fan module and a blowing device. Background Art

[0002] In the hot summer, fans have become a must-have item for people to get rid of the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0003] In the prior art, a fan motor and fan blades are provided inside the fan, wherein the fan motor is fixed in the fan housing, and the fan motor is connected to the fan blades through a rotating shaft. The inventor of the present invention found in the research that in the prior art, the fan blades have uneven mass distribution due to problems such as processing errors, installation errors or process defects during the manufacturing process. When the fan blades are rotating at high speed, the uneven mass on the fan blades will cause the fan blades to vibrate, and in certain circumstances may also cause resonance, which will lead to reduced air outlet efficiency of the fan blades and damage to the fan blades. Summary of the invention

[0004] The purpose of the present application is to provide a fan module and a blowing device that can balance the mass of fan blades and make the rotation of fan blades more stable.

[0005] The present application provides a fan module, including:

[0006] case;

[0007] A fan motor, wherein the fan motor is arranged in the housing;

[0008] The fan blades are connected with the fan motor through a rotating shaft, and the fan blades are provided with a first balance ring portion and a second balance ring portion, and the diameter of the first balance ring portion is greater than the diameter of the second balance ring portion.

[0009] Optionally, the first balancing ring portion and the second balancing ring portion are both surrounded by a plurality of balancing grooves; and / or,

[0010] The number of balancing grooves of the first balancing ring part is greater than the number of balancing grooves constituting the second balancing ring part; and / or,

[0011] The ratio of the inner diameter of the shell to the maximum diameter of the fan blade is in the range of 1.01-1.15.

[0012] Optionally, the balancing groove of the first balancing ring portion is configured in a square shape, and the balancing groove of the second balancing ring portion is configured in a wedge shape.

[0013] Optionally, the fan blades include: a hub and a plurality of blades, the plurality of blades extending obliquely around the hub surface, the hub being connected to the rotating shaft; and,

[0014] The first balancing ring portion and the second balancing ring portion are both arranged on the surface of the hub; or,

[0015] The first balance ring portion is arranged on the inner surface of the hub, and the second balance ring portion is arranged on the surface of the hub.

[0016] Optionally, each of the multiple blades includes a first end and a second end opposite to the first end, the length of the first end is greater than the length of the second end, the first balance ring portion is arranged on a side adjacent to the second end, and the second balance ring portion is arranged on a side adjacent to the first end.

[0017] Optionally, each of the blades is provided with a blade edge, and the thickness of each blade gradually increases from the first end to the blade edge, and the thickness of each blade gradually decreases from the blade edge to the second end; and / or,

[0018] The length ratio of the first end portion to the second end portion is in the range of 1.4-1.9.

[0019] Optionally, the wheel hub includes: a top surface, a bottom surface and a side edge, the cross-sectional area of ​​the bottom surface is larger than the cross-sectional area of ​​the top surface, and there is a smooth transition between the top surface and the side edge, the first balance ring portion is arranged on the side edge and connected to the bottom surface, and the second balance ring portion is arranged on the side edge.

[0020] Optionally, the second balancing ring portion is arranged between the top surface and the first end portion, and a plurality of balancing grooves of the second balancing ring portion are enclosed to form a truncated cone shape.

[0021] Optionally, the multiple balancing grooves of the first balancing ring portion are arranged in pairs between two adjacent blades, and two adjacent balancing grooves of the first balancing ring portion are separated by a first partition plate or a second partition plate, and along the circumferential direction of the hub, the length of the second partition plate is greater than the length of the first partition plate.

[0022] To achieve the purpose of the present application, an embodiment of the present application further provides a blowing device, which is assembled with a fan module described in any one of the above items.

[0023] The beneficial effects of the embodiments of the present application are as follows: the fan motor and fan blades of the fan module are arranged in the housing, and the first balance ring part and the second balance ring part are provided on the fan blades. By filling the corresponding positions of the first balance ring part and the second balance ring part with balance soil, the mass distribution of the fan blades is balanced, so that the rotation efficiency and stability of the fan blades are improved. At the same time, the two adjustment ring parts of the first balance ring part and the second balance ring part can increase the adjustable space of the fan blades, so as to achieve the purpose of balancing the mass deviation of a larger range formed by the fan blades. The diameter of the first balance ring part is greater than the diameter of the second balance ring part. During the rotation of the fan blades, the torque of the first balance ring part is greater than the torque of the second balance ring part. The same mass of balance soil produces different regulating effects on the first balance ring part and the second balance ring part. Therefore, this structure has different levels of balancing effect on the fan blades. The combination of the two can achieve more accurate mass balancing, thereby greatly improving the rotation efficiency and stability of the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1 This is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application;

[0027] Figure 3 This is a schematic structural diagram of a shell from a first perspective of a specific embodiment of the present application;

[0028] Figure 4 This is a schematic structural diagram of a shell from a second viewing angle according to a specific embodiment of the present application;

[0029] Figure 5 This is a schematic structural diagram of a fan blade from a first perspective of a specific embodiment of the present application;

[0030] Figure 6 This is a schematic structural diagram of a fan blade from a second perspective of a specific embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0033] Example 1

[0034] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 2 Schematic diagram of the exploded structure of the fan module of this embodiment.

[0035] like Figure 1 and Figure 2 As shown, a fan module comprises: a housing 1, a fan motor 2 and a fan blade 3. The fan motor 2 is arranged in the housing 1; the fan blade 3 is provided with a first balance ring portion 33 and a second balance ring portion 34, and the diameter of the first balance ring portion 33 is greater than the diameter of the second balance ring portion 34.

[0036] In the above embodiment, the fan motor 2 and the fan blade 3 of the fan module are arranged in the housing 1, and the first balance ring part 33 and the second balance ring part 34 are provided on the fan blade 3. By filling the corresponding positions of the first balance ring part 33 and the second balance ring part 34 with balance soil, the mass distribution of the fan blade 3 is balanced, so that the rotation efficiency and stability of the fan blade 3 are improved. At the same time, the two adjustment ring parts of the first balance ring part 33 and the second balance ring part 34 can increase the adjustable space of the fan blade 3, so as to achieve the purpose of balancing the mass deviation of the fan blade 3 in a larger range. The diameter of the first balance ring part 33 is greater than the diameter of the second balance ring part 34. During the rotation of the fan blade 3, the torque of the first balance ring part 33 is greater than the torque of the second balance ring part 34. The same mass of balance soil has different regulating effects on the first balance ring part 33 and the second balance ring part 34. Therefore, this structure has different levels of balancing effect on the fan blade 3. The combination of the two can achieve more accurate mass balancing, thereby greatly improving the rotation efficiency and stability of the fan blade 3.

[0037] In this embodiment, the housing 1 is configured as a cylinder, and a cylindrical air cavity is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

[0038] In this embodiment, the housing 1 is provided with an air cavity that runs through the upper and lower surfaces thereof, and the air cavity is configured in a cylindrical shape. However, the shape of the air cavity is not limited thereto, and in some embodiments, the shape of the air cavity can be star-shaped, heart-shaped, runway-shaped, or polygonal, depending on the specific application scenario.

[0039] In some embodiments, a horn or a fairing with a necked opening is further disposed in the housing 1 .

[0040] The fan motor 2 is arranged in the housing 1 through the connecting member 4. In some embodiments, the connecting member 4 includes: a connecting ring 41 and a plurality of connecting plates 42, the plurality of connecting plates 42 are arranged around the connecting ring 41, one end of each of the plurality of connecting plates 42 is connected to the inner surface of the housing 1, the other end of each of the connecting plates 42 is connected to the connecting ring 41, and two adjacent connecting plates 42 in the plurality of connecting plates 42 are enclosed to form an air duct. The connecting ring 41 is interference-fitted or snap-fitted with the fan motor 2, or a connecting column 43 is arranged on the connecting ring 41, and the fan motor 2 is sleeved on the connecting column 43.

[0041] See also Figure 3 and Figure 4 . Figure 3 This is a schematic structural diagram of the housing of this embodiment from a first viewing angle; Figure 4Schematic diagram of the structure of the shell of this embodiment from a second viewing angle.

[0042] like Figure 3 and Figure 4 As shown, the arrangement of multiple connecting plates 42 enables the connecting ring 41 to be suspended in the housing 1 , and every two connecting plates 42 among the multiple connecting plates 42 enclose an air duct, allowing the airflow driven by the fan assembly to flow through the air duct.

[0043] The connection member 4 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connection member 4 can be a connector formed perpendicular to the inner surface of the shell 1 .

[0044] The fan motor 2 is fixed on the connecting ring 41. However, the fixing method of the fan motor 2 is not limited thereto. According to different specific application scenarios, in some embodiments, a connecting column 43 is provided on the connecting ring 41, and the fan motor 2 can be sleeved on the connecting column 43. The connecting column 43 can be integrally formed with the connecting ring 41, or can be fixed on the connecting ring 41 by means of clamping, riveting, screw connection or gluing.

[0045] In some embodiments, the fan motor 2 includes: a coil 22 and a magnetic ring 23, wherein the coil 22 is sleeved on the connecting column 43 and has an interference fit with the connecting column 43, and the magnetic ring 23 is arranged in the fan blade 3. One end of the rotating shaft 21 is connected to the fan blade 3, and the other end is connected to the connecting column 43.

[0046] In some embodiments, the fan motor 2 includes: a coil 22, a magnetic ring 23 and a motor housing 24, the coil 22 is sleeved on the connecting column 43 and has an interference fit with the connecting column 43, the magnetic ring 23 is arranged in the motor housing 24 and sleeved on the coil 22. One end of the rotating shaft 21 is connected to the fan blade 3, and the other end is connected to the connecting column 43 and has an interference fit with the motor housing 24.

[0047] In some embodiments, the fan motor 2 is a conventional motor, which is fixed to the connecting ring 41 by means of clamping, screw fixing, riveting, adhesive connection, welding, etc.

[0048] In some embodiments, the fan motor 2 can be connected to the housing 1 through the structure inside the housing 1, for example, a connecting platform is provided on the inner wall of the housing 1, and the connecting platform is connected to the fan motor 2. Alternatively, a connecting rod is inserted into the housing 1, and the fan motor 2 is fixed on the connecting rod. Alternatively, two opposite clamping parts extend inwardly from the inner surface of the housing 1 to clamp and fix the fan motor 2.

[0049] In some embodiments, an abutment plate extends from the inner surface of the housing 1 toward the fan motor 2 to fix the fan motor 2 by clamping, or a supporting structure extends laterally from the housing 1 to fix the fan motor 2 .

[0050] The fan motor 2 is connected to the fan blades 3 via the rotating shaft 21. One end of the rotating shaft 21 is connected to the fan motor 2 and the connecting column 43, and the other end is connected to the fan blades 3. However, the connection method of the rotating shaft 21 is not limited thereto. Depending on the specific application scenario, in some embodiments, the end of the rotating shaft 21 connected to the fan motor 2 is also connected to the connecting column 43. In some embodiments, when the magnetic ring 23 is fixed in the fan blades 3, one end of the rotating shaft 21 is only connected to the connecting ring 41 or the connecting column 43, and the other end is connected to the fan blades 3.

[0051] In this embodiment, the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 3 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 3 defines the gap between the housing 1 and the maximum diameter of the fan blades 3. When the fan blades 3 rotate, centrifugal force is generated on the airflow passing through the fan blades 3. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 3 is limited to 1.01-1.15, which limits the gap between the fan blades 3 and the housing 1, reduces the stroke of the lateral airflow under the action of the centrifugal force, and limits the speed of the airflow when it contacts the inner side surface of the housing 1 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 and the maximum diameter of the fan blades 3 is limited to between 1.01 and 1.15, within this ratio range, the distance between the fan blades 3 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 3, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 3, thereby improving the air intake efficiency of the fan module. The improvement in the air intake efficiency improves the overall air outlet efficiency of the fan module.

[0052] See also Figure 5 and Figure 6 . Figure 5 This is a schematic structural diagram of the fan blades of this embodiment from a first viewing angle; Figure 6 This is a schematic structural diagram of the fan blades of this embodiment from a second viewing angle.

[0053] like Figure 5 and Figure 6As shown, the first balance ring part 33 and the second balance ring part 34 are both surrounded by a plurality of balance grooves 35. The independent balance groove 35, as the smallest balance unit, is conducive to quantifying the balance adjustment and is convenient for the user to perform leveling. At the same time, since the balance grooves 35 of the first balance ring part 33 and the second balance ring part 34 have different torques, the balance grooves 35 of the first balance ring part 33 have a larger torque and can be used for coarse adjustment, and the balance grooves 35 of the second balance ring part 34 have a smaller torque and can achieve fine adjustment. The combination of the two can achieve a combination of coarse adjustment and fine adjustment, and achieve more accurate leveling.

[0054] The number of the balancing grooves 35 of the first balancing ring portion 33 can be (not limited to): 2, 3, 4, 5, 10, 18, 26 or more. The number of the balancing grooves 35 of the first balancing ring portion 33 can be arbitrarily set based on actual needs.

[0055] The number of the balancing grooves 35 of the second balancing ring portion 34 can be (not limited to): 2, 3, 4, 5, 11, 18, 26 or more. The number of the balancing grooves 35 of the second balancing ring portion 34 can be arbitrarily set based on actual needs.

[0056] In some embodiments, the first balance ring portion 33 is configured as an annular groove, and the second balance ring portion 34 is also configured as an annular groove.

[0057] In some embodiments, the number of balancing grooves 35 of the first balancing ring portion 33 is greater than the number of balancing grooves 35 constituting the second balancing ring portion 34. The number of balancing grooves 35 of the first balancing ring portion 33 is greater than the number of balancing grooves 35 of the second balancing ring portion 34, which can make the adjustable range of the first balancing ring portion 33 larger and increase the adjustable space of the fan blades 3. At the same time, since the torque of the first balancing ring portion 33 is greater and the number of balancing grooves 35 of the first balancing ring portion 33 is greater, the upper limit of the interval for leveling the fan blades 3 can be maximized, thereby increasing the scene adaptability of the fan blades 3.

[0058] The balancing groove 35 of the first balancing ring portion 33 is configured in a square shape. However, the shape of the balancing groove 35 of the first balancing ring portion 33 is not limited to that of a circle, an ellipse, a semicircle, a semi-ellipse, a racetrack, a wedge, or other polygons other than a quadrilateral, etc., depending on the specific application scenario.

[0059] The balancing groove 35 of the second balancing ring portion 34 is configured in a wedge shape. However, the shape of the balancing groove 35 of the second balancing ring portion 34 is not limited to that of a circle, an ellipse, a semicircle, a semi-ellipse, a racetrack, a polygon, etc., depending on the specific application scenario.

[0060] The fan blades 3 include: a hub 31 and a plurality of blades 32 , wherein the plurality of blades 32 extend obliquely around the surface of the hub 31 , and the hub 31 is connected to the rotating shaft 21 .

[0061] In this embodiment, the number of blades 32 is 9. However, the number of blades 32 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of blades 32 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

[0062] The first balancing ring portion 33 and the second balancing ring portion 34 are both arranged on the surface of the hub 31. Such an arrangement of the first balancing ring portion 33 and the second balancing ring portion 34 facilitates the filling of balancing soil and makes the leveling work more convenient.

[0063] In some embodiments, the first balancing ring portion 33 is disposed on the inner surface of the hub 31, and the second balancing ring portion 34 is disposed on the surface of the hub 31. The arrangement of the first balancing ring portion 33 and the second balancing ring portion 34 can more directly adjust the mass imbalance formed on the inner surface of the hub 31. At the same time, the balancing soil in the first balancing ring portion 33 is more firmly connected under the centrifugal force when the fan blades 3 rotate.

[0064] The wheel hub 31 includes: a top surface 311, a bottom surface 313 and a side edge 312. The cross-sectional area of ​​the bottom surface 313 is larger than the cross-sectional area of ​​the top surface 311, and there is a smooth transition between the top surface 311 and the side edge 312. The first balance ring portion 33 is arranged on the side edge 312 and connected to the bottom surface 313. The second balance ring portion 34 is arranged on the side edge 312.

[0065] That is, in this embodiment, the hub 31 is configured to be in the shape of a bullet head with a flat head. This shape of the hub 31 enables the airflow passing through the blades 32 to flow along the arc surface formed by the smooth transition between the top surface 311 and the side edge 312 to form a wall effect, which has a good guiding effect on the airflow, improves the efficiency of the airflow flowing in the fan blades 3, and further improves the air outlet efficiency of the fan module.

[0066] The first balancing ring portion 33 is arranged on the side 312 and communicates with the bottom surface 313, and the second balancing ring portion 34 is arranged on the side 312. The first balancing ring portion 33 is arranged at the position where the torque of the hub 31 is the largest, which maximizes the leveling effect of the first balancing ring portion 33 and improves the upper limit of leveling. The combination of the positions of the first balancing ring portion 33 and the second balancing ring portion 34 can make the leveling of the fan blade 3 more hierarchical, and improve the upper limit and accuracy of leveling.

[0067] However, the shape of the hub 31 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 31 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

[0068] The top surface 311 of the hub 31 is a circular surface. However, the shape of the top surface 311 is not limited thereto, and according to different specific application scenarios, in some embodiments, the top surface 311 of the hub 31 can also be conical, polygonal, elliptical or other shapes.

[0069] An opening is provided on the bottom surface 313 of the hub 31, and the opening is connected to the accommodating cavity inside the hub 31, and a connecting sleeve is provided in the accommodating cavity. In some embodiments, a plurality of reinforcing ribs are provided around the connecting sleeve, and the plurality of reinforcing ribs are arranged around the connecting sleeve, one end of the reinforcing rib is connected to the connecting sleeve, and the other end of the reinforcing rib is connected to the inner surface of the hub 31.

[0070] Each blade 32 among the multiple blades 32 includes a first end 321 and a second end 322 opposite to the first end 321, the length of the first end 321 is greater than the length of the second end 322, the first balance ring portion 33 is arranged on a side adjacent to the second end 322, and the second balance ring portion 34 is arranged on a side adjacent to the first end 321.

[0071] The first end 321 is located adjacent to the top surface 311 of the hub 31, and the second end 322 is located adjacent to the bottom surface 313 of the hub 31. In each blade 32, the first end 321 is used to push the airflow into the fan blade 3 when the fan blade 3 rotates. The longer length of the first end 321 is conducive to pushing the airflow. The second end 322 is located at the end of the airflow direction. The reduction in the length of the second end 322 is conducive to reducing the size of the space where the airflow flows, compressing the airflow, and increasing the initial kinetic energy of the airflow, thereby improving the air outlet efficiency of the fan module.

[0072] In some embodiments, the length ratio of the first end 321 and the second end 322 is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 321 to the second end 322, and the direction of the first end 321 facing the second end 322 gradually decreases. This reduction process cooperates with the size change of the hub 31 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, since there is a gap between the fan blades 3 and the housing 1, when the pressure of the airflow entering the first end 321 and flowing out of the second end 322 is obviously too large, since it is not a completely closed space, the airflow will have a backflow phenomenon due to excessive pressure, and the backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio of the first end 321 and the second end 322 is limited to 1.4-1.9. Within this ratio range, the airflow pressure flowing through the fan blades 3 is adjusted within the optimal range, which minimizes the backflow problem caused by excessive pressure of the airflow. At the same time, within the range of this ratio, the first end 321 can most effectively intercept and utilize the return airflow gradually overflowing from the edge of the blade 32, and reduce the probability of the return airflow flowing out of the housing 1 to the greatest extent. The combination of the two functions can make the airflow entering the first end 321 and the airflow outflowing from the end of the airflow approach the optimal value of 1:1, which greatly improves the air outlet efficiency of the fan blade 3.

[0073] The first balance ring portion 33 is arranged on a side adjacent to the second end portion 322, and the second balance ring portion 34 is arranged on a side adjacent to the first end portion 321. The first balance ring portion 33 and the second balance ring portion 34 are arranged on both sides of the blade 32, and the spatial layout is reasonable, and will not affect the normal layout of the surface of the fan blade 3. The first balance ring portion 33 and the second balance ring portion 34 distributed on both sides of the blade 32 can better adjust the imbalance problem of the fan blade 3 caused by the uneven mass distribution of the blade 32. At the same time, the distance between the first balance ring portion 33 and the second balance ring portion 34 is greater than the length of the blade 32, which can expand the leveling coverage of the first balance ring portion 33 and the second balance ring portion 34 to the entire fan page, thereby improving the leveling range.

[0074] Each blade 32 is provided with a blade edge 323. The thickness of each blade 32 gradually increases from the first end 321 to the blade edge 323, and the thickness of each blade 32 gradually decreases from the blade edge 323 to the second end 322. The thickness of different parts of the blade 32 varies, so that each blade 32 is constructed into a structure that is thinner at both ends and thicker in the middle. This structure enhances the cutting ability of the two ends of the blade 32 on the airflow and reduces the air resistance at both ends of the blade 32. The increase in the thickness of the middle part can enhance the physical strength of the blade 32. At the same time, the increase in the thickness of the blade 32 reduces the space between two adjacent blades 32, which has a pressurizing effect on the airflow passing through.

[0075] The second balancing ring portion 34 is disposed between the top surface 311 and the first end portion 321, and the plurality of balancing grooves 35 of the second balancing ring portion 34 are enclosed and configured to be in a truncated cone shape. Since the cross-sectional area of ​​the hub 31 increases from the top surface 311 to the bottom surface 313 of the hub 31, the side edge 312 of the hub 31 is configured to be in an arc shape. The plurality of balancing grooves 35 of the second balancing ring portion 34 are enclosed and configured to be in a truncated cone shape, so that the distribution of the balancing grooves 35 is more reasonable, conforming to the trend change of the side wall, and improving the space utilization rate.

[0076] The multiple balancing grooves 35 of the first balancing ring portion 33 are arranged in pairs between two adjacent blades 32. Two adjacent balancing grooves 35 of the first balancing ring portion 33 are separated by a first partition plate 331 or a second partition plate 332. Along the circumferential direction of the hub 31, the length of the second partition plate 332 is greater than the length of the first partition plate 331.

[0077] The plurality of balancing grooves 35 of the first balancing ring portion 33 are arranged in pairs between two adjacent blades 32. This design reasonably utilizes the space of the fan blades 3, increases the number of balancing grooves 35 that can be arranged on the first balancing ring portion 33, and improves the ability to level the fan blades 3.

[0078] Two adjacent balancing grooves 35 of the first balancing ring portion 33 are separated by a first partition plate 331 or a second partition plate 332. Each independent balancing groove 35 serves as the minimum leveling unit of the first balancing ring portion 33. The balancing grooves 35 are isolated from each other, thereby avoiding mutual interference when filling balancing soil between the balancing grooves 35 and improving the filling efficiency.

[0079] Along the circumferential direction of the hub 31, the length of the second partition 332 is greater than that of the first partition 331. The change in the interval length makes the leveling ability of the first balance ring part 33 not the superposition of the unit leveling ability, but a numerical span appears. This span change is combined with the fine-tuning ability of the second balance ring part 34. The fine-tuning ability is a supplement to the numerical span, which can quickly achieve the leveling purpose.

[0080] In some embodiments, the second partition 332 is connected to the second end 322 of the blade 32 . This connection method fully utilizes the space of the fan blade 3 , extends the length of the blade 32 , and improves the air outlet efficiency of the fan blade 3 .

[0081] The fan module housing 1 is provided with a flexible sleeve 5, and the flexible sleeve 5 is alternately provided with annular protrusions 51 and dot-shaped protrusions 52. The anti-fall performance of the fan module is improved, and when used in combination, the noise and vibration of the fan module can be reduced.

[0082] 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 method should not be limited to the combination methods listed in this embodiment.

[0083] Example 2

[0084] A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

[0085] It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

[0086] The fan motor 2 and the fan blade 3 of the fan module of the blowing device in this embodiment are arranged in the housing 1, and the first balance ring part 33 and the second balance ring part 34 are provided on the fan blade 3. By filling the balance soil into the corresponding positions of the first balance ring part 33 and the second balance ring part 34, the mass distribution of the fan blade 3 is balanced, so that the rotation efficiency and stability of the fan blade 3 are improved. At the same time, the two adjustment ring parts of the first balance ring part 33 and the second balance ring part 34 can increase the adjustable space of the fan blade 3, so as to achieve the purpose of balancing the mass deviation of the fan blade 3 in a larger range. The diameter of the first balance ring part 33 is greater than the diameter of the second balance ring part 34. During the rotation of the fan blade 3, the torque of the first balance ring part 33 is greater than the torque of the second balance ring part 34. The same mass of balance soil has different regulating effects on the first balance ring part 33 and the second balance ring part 34. Therefore, this structure has different levels of balancing effect on the fan blade 3. The combination of the two can achieve more accurate mass balancing, thereby greatly improving the rotation efficiency and stability of the fan blade 3.

[0087] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not intended to be additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A fan module, characterized in that: include: case; A fan motor, wherein the fan motor is arranged in the housing; The fan blades are connected with the fan motor through a rotating shaft, and the fan blades are provided with a first balance ring portion and a second balance ring portion, and the diameter of the first balance ring portion is greater than the diameter of the second balance ring portion.

2. The fan module according to claim 1, characterized in that: The first balancing ring portion and the second balancing ring portion are both surrounded by a plurality of balancing grooves; and / or, The number of balancing grooves of the first balancing ring part is greater than the number of balancing grooves constituting the second balancing ring part; and / or, The ratio of the inner diameter of the shell to the maximum diameter of the fan blade is in the range of 1.01-1.

15.

3. The fan module according to claim 2, characterized in that: The balancing groove of the first balancing ring part is configured in a square shape, and the balancing groove of the second balancing ring part is configured in a wedge shape.

4. The fan module according to claim 2, characterized in that: The fan blades include: a hub and a plurality of blades, the plurality of blades extending obliquely around the hub surface, the hub being connected to the rotating shaft; and, The first balancing ring portion and the second balancing ring portion are both arranged on the surface of the hub; or, The first balance ring portion is arranged on the inner surface of the hub, and the second balance ring portion is arranged on the surface of the hub.

5. The fan module according to claim 4, characterized in that: Each of the plurality of blades includes a first end and a second end opposite to the first end, the length of the first end is greater than the length of the second end, the first balance ring portion is arranged on a side adjacent to the second end, and the second balance ring portion is arranged on a side adjacent to the first end.

6. The fan module according to claim 5, characterized in that: Each of the blades is provided with a blade edge, and the thickness of each blade gradually increases from the first end to the blade edge, and the thickness of each blade gradually decreases from the blade edge to the second end; and / or, The length ratio of the first end portion to the second end portion is in the range of 1.4-1.

9.

7. The fan module according to claim 5, characterized in that: The wheel hub includes: a top surface, a bottom surface and a side edge, the cross-sectional area of ​​the bottom surface is larger than the cross-sectional area of ​​the top surface, and there is a smooth transition between the top surface and the side edge, the first balance ring portion is arranged on the side edge and connected to the bottom surface, and the second balance ring portion is arranged on the side edge.

8. The fan module according to claim 7, characterized in that: The second balancing ring portion is disposed between the top surface and the first end portion, and a plurality of balancing grooves of the second balancing ring portion are enclosed to form a truncated cone shape.

9. The fan module according to claim 5, characterized in that: The multiple balancing grooves of the first balancing ring part are arranged in pairs between two adjacent blades, and two adjacent balancing grooves of the first balancing ring part are separated by a first partition plate or a second partition plate. Along the circumferential direction of the hub, the length of the second partition plate is greater than the length of the first partition plate.

10. A blowing device, characterized in that: The blowing device is assembled with a fan module as described in any one of claims 1-9.

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