Fan assembly and blowing device

Abstract

The utility model discloses a fan assembly and a blowing device. The fan assembly comprises a fan shell; the assembly seat is arranged in the fan shell, and the assembly seat is connected with the fan shell through a plurality of static blades; the motor assembly is assembled in the fan shell; the fan blades are connected with the motor assembly; an air inlet opening communicated with the interior of the fan shell and the interior of the motor assembly is formed in the motor assembly, an internal assembling gap allowing airflow to flow is formed in the motor assembly, a first air outlet hole is formed in the assembling base, and the air inlet opening, the internal assembling gap and the first air outlet hole form a first heat dissipation channel. Air flow enters the motor assembly along the air inlet opening of the motor assembly under the action of air pressure and flows out of the motor assembly through the internal assembling gap and the first air outlet hole.

Description

Technical Field

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

[0002] 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.

[0003] In the prior art, a fan is provided with a fan motor and fan blades, wherein the fan motor is fixed in a fan housing and connected to the fan blades via a rotating shaft. In order to increase the air output efficiency and air volume of the fan, the fan motor speed is usually increased.

[0004] The inventors of this invention discovered during research that when the fan motor rotates at high speed, it will generate a lot of heat. After the heat accumulates, if the fan motor cannot be cooled in time, it will cause the fan motor to overheat, affecting the stability of the fan motor's operation, and in severe cases even causing damage to the fan motor or fire. Utility Model Content

[0005] The purpose of this application is to provide a fan assembly and a blowing device that can dissipate heat from a fan motor in a timely and effective manner.

[0006] An embodiment of the present application provides a fan assembly, comprising:

[0007] fan housing;

[0008] An assembly seat, the assembly seat is arranged in the fan housing, and the assembly seat is connected to the fan housing through a plurality of stationary blades;

[0009] a motor assembly, the motor assembly being assembled in the fan housing;

[0010] fan blades, the fan blades being connected to the motor assembly;

[0011] The motor assembly is provided with an air inlet opening connecting the interior of the fan housing and the interior of the motor assembly. The interior of the motor assembly is provided with an internal assembly gap for air flow. The assembly seat is provided with a first air outlet. The air inlet opening, the internal assembly gap and the first air outlet constitute a first heat dissipation path.

[0012] To achieve the purpose of this application, an embodiment of this application further provides a blowing device, which is assembled with any one of the fan assemblies described above.

[0013] The beneficial effects of the embodiments of the present application are as follows: the fan blades rotate under the drive of the motor assembly, and the rotation of the fan blades thereby pushes the airflow in the fan housing to move in a directional manner. Airflow is a fluid, and the unique flow characteristics of the fluid will cause the airflow to flow to any airflow channel connected to the external environment. Under the action of wind pressure, the airflow enters the interior of the motor assembly along the air inlet opening of the motor assembly, and flows out from the interior of the motor assembly through the internal assembly gap and the first air outlet. The above-mentioned flow of airflow will take away the heat generated by the operation of the motor assembly, cool the motor assembly, and play a role in air cooling. Since the first heat dissipation path cools the interior of the motor assembly, under the condition of the same air volume, since the temperature inside the motor assembly is higher, more heat is taken away by air cooling, and the heat dissipation effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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:

[0015] Figure 1 This is a schematic diagram of the overall structure of a fan assembly according to a specific embodiment of the present application;

[0016] Figure 2 This is a schematic cross-sectional view of a fan assembly according to a specific embodiment of the present application;

[0017] Figure 3 This is an exploded schematic diagram of a fan assembly according to a specific embodiment of the present application;

[0018] Figure 4 This is a schematic structural diagram of a fan housing according to a specific embodiment of the present application;

[0019] Figure 5 A schematic diagram of the airflow path of a first heat dissipation path according to a specific embodiment of the present application;

[0020] Figure 6 A schematic diagram of the airflow path of the second heat dissipation path according to a specific embodiment of the present application;

[0021] Figure 7 This is a schematic diagram of the support structure of a specific embodiment of the present application;

[0022] Figure 8 This is a schematic cross-sectional view of a support member according to a specific embodiment of the present application;

[0023] Figure 9 This is a schematic structural diagram of a motor housing according to a specific embodiment of the present application;

[0024] Figure 10 This is a schematic diagram of the coil structure and gap indication of a specific embodiment of the present application;

[0025] Figure 11 A cross-sectional view and gap indication diagram of a fan assembly according to a specific embodiment of the present application;

[0026] Figure 12 This is a schematic diagram of the hollow tube structure of a specific embodiment of the present application.

[0027] Description of the drawings: 1. Fan housing; 11. Stationary blades; 111. Guide serrations; 2. Mounting base; 21. Connecting tube; 22. Connecting ring; 23. Hollow tube; 231. First hollow end; 232. Second hollow end; 24. First air outlet; 3. Motor assembly; 31. Motor rotor; 311. Motor housing; 312. Magnetic ring; 313. Rotating shaft; 314. Air inlet opening; 32. Motor stator; 321. Coil; 322. 2. Iron core; 33. First bearing; 34. First elastic member; 35. Support member; 351. First support end; 352. Second support end; 353. First deformation notch; 354. Second deformation notch; 355. Ridge; 36. Second bearing; 4. Fan blade; 41. Hub; 411. Reinforcement rib; 42. Moving blade; 421. Trailing edge serration; 43. Connecting shaft column; 5. PCB circuit board; 51. Second air outlet. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present application, the present application 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 being "fixed to" another element, it can be directly on the other element, or one or more elements can be located between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more elements can be located between them. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0030] Example 1

[0031] See also Figure 1 、 Figure 2 and Figure 5 , Figure 1 Schematic diagram of the overall structure of the fan assembly of this embodiment; Figure 2 is a schematic cross-sectional view of the fan assembly of this embodiment; Figure 5 Schematic diagram of the airflow path of the first heat dissipation path of this embodiment.

[0032] like Figure 1 、 Figure 2 and Figure 5 As shown, a fan assembly includes: a fan housing 1; an assembly base 2, the assembly base 2 is arranged in the fan housing 1, and the assembly base 2 is connected to the fan housing 1 through a plurality of static blades 11; a motor assembly 3, the motor assembly 3 is assembled in the fan housing 1; fan blades 4, the fan blades 4 are connected to the motor assembly 3; an air inlet opening 314 is provided on the motor assembly 3, which connects the interior of the fan housing 1 and the interior of the motor assembly 3, and an internal assembly gap (not shown) is provided inside the motor assembly 3 for air flow, and a first air outlet hole 24 is provided on the assembly base 2, and the air inlet opening 314, the internal assembly gap and the first air outlet hole 24 constitute a first heat dissipation path.

[0033] In this embodiment, the fan housing 1 is constructed in a cylindrical shape, and a cylindrical air cavity is defined within the cylinder. However, the shape of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the fan housing 1 can be: a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes. The external structure of the fan housing 1 can be determined according to the needs of the specific application scenario and is not limited to the specific embodiment.

[0034] One end of the mounting base 2 is disposed within the fan housing 1, and the other end of the mounting base 2 extends outside the fan housing 1. However, the positional relationship between the mounting base 2 and the fan housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the entire mounting base 2 is disposed within the fan housing 1. The positional relationship between the mounting base 2 and the fan housing 1 can be determined based on the needs of the specific application scenario and is not limited to the specific embodiment.

[0035] In this embodiment, the number of stator blades 11 is 7. However, the number of stator blades 11 is not limited to this. Depending on the specific application scenario, the number of stator blades 11 can be 2, 3, 4, 5, 6, 8, or more. The number of stator blades 11 can be determined based on the needs of the specific application scenario and is not limited to the specific embodiment.

[0036] In this embodiment, the motor assembly 3 can be (but not limited to): a single-phase motor, a two-phase motor or a three-phase motor.

[0037] The fan blades 4 can be (but not limited to) axial flow fans or diagonal flow fans in terms of their structure. In specific applications, the fan blades 4 can be selected according to the needs of the specific application scenario, which is not limited here.

[0038] In some embodiments, the first air outlet 24 has multiple functions. For example, the first air outlet 24 can serve as a wiring hole for the motor assembly 3. Depending on the specific application scenario, the first air outlet 24 may have other functions that are not listed here one by one. However, it should be noted that regardless of the different uses of the holes and gaps provided in the assembly base 2, as long as they also have the function of ventilation and air flow, they are considered the first air outlet 24 in this embodiment.

[0039] In some embodiments, there are two or more first air outlet holes 24 .

[0040] In this embodiment, the internal assembly gap refers to the space within the motor assembly that allows airflow, including (but not limited to): the coupling gap H3, the coil gap H5, or the separation gap between the strip magnetic rings (not shown).

[0041] In the above embodiment, the fan blades 4 rotate under the drive of the motor assembly 3, and the rotation of the fan blades 4 further drives the airflow in the fan housing 1 to move in a directional manner. Airflow is a fluid, and the unique flow characteristics of the fluid will cause the airflow to flow to any airflow channel connected to the external environment. Under the action of wind pressure, the airflow enters the interior of the motor assembly 3 along the air inlet opening of the motor assembly 3, and flows out from the interior of the motor assembly 3 through the internal assembly gap and the first air outlet 24. The above flow of airflow will take away the heat generated by the operation of the motor assembly 3, cool down the motor assembly 3, and play a role in air cooling. Since the first heat dissipation path cools the interior of the motor assembly 3, under the condition of equal air volume, since the temperature inside the motor assembly 3 is higher, more heat is taken away by air cooling, and the heat dissipation effect is more obvious.

[0042] See also Figure 11 , Figure 11 Schematic diagram of the cross-section and gap indication of the fan assembly of this embodiment.

[0043] like Figure 11 As shown, in some embodiments, there is an air inlet gap H1 between the fan blades 4 and the assembly seat 2, a second assembly gap H4 is provided between the motor assembly 3 and the assembly seat 2, and a first air outlet hole 24 is provided on the assembly seat 2. The air inlet gap H1, the second assembly gap H4 and the first air outlet hole 24 constitute a second heat dissipation path.

[0044] In some embodiments, the assembly base 2 is relatively short and does not fit over the motor assembly 3. Specifically, the motor housing 311 of the motor assembly 3 is exposed. When the assembly base 2 is positioned to one side of the motor assembly 3, the second assembly gap H4 between the motor assembly 3 and the assembly base 2 is similar to the air inlet gap H1 between the motor assembly 3 and the fan blades 4. In this case, the second assembly gap H4 can function as an air outlet for the motor assembly 3, and air flowing out of the internal assembly gap can flow out through the second assembly gap H4 and the first air outlet 24.

[0045] In this embodiment, the width of the air inlet gap H1 is determined by the end-to-end distance between the fan blades 4 and the assembly base 2. In some embodiments, the air inlet gap H1 is a narrow gap with a relatively short distance. In other embodiments, the air inlet gap H1 is a wide gap with a relatively long distance.

[0046] In this embodiment, the second assembly gap H4 refers to the distance between the inner surface of the assembly seat 2 and the outer surface of one end of the motor assembly 3 inserted into the assembly seat 2.

[0047] See also Figure 6 , Figure 6 Schematic diagram of the airflow path of the second heat dissipation path of this embodiment.

[0048] like Figure 6 As shown, the fan blades 4 rotate under the drive of the motor assembly 3, and the rotation of the fan blades 4 thereby pushes the airflow in the fan housing 1 to move in a directional manner. Airflow is a fluid, and the unique flow characteristics of a fluid can cause the airflow to flow to any airflow channel connected to the external environment. There is an air inlet gap H1 between the fan blades 4 and the assembly base 2, and a second assembly gap H4 between the motor assembly 3 and the assembly base 2. The assembly base 2 is provided with a first air outlet 24. The air inlet gap H1, the second assembly gap H4 and the first air outlet 24 form a complete airflow channel leading to the external environment. When the motor assembly 3 is working, it generates heat. If this heat is not dissipated in time, it will affect the normal operation of the motor assembly 3, and in serious cases, it will cause the fan assembly to be damaged or burned. The airflow flows along the second heat dissipation path formed by the air inlet gap H1, the second assembly gap H4 and the first air outlet 24, which will take away the heat generated by the operation of the motor assembly 3, cool the motor assembly 3, and play a role in air cooling.

[0049] In some embodiments, the motor assembly 3 is a three-phase motor, which has a higher rotation speed, thereby increasing the air output rate and air output volume of the fan assembly.

[0050] In some embodiments, the motor assembly 3 is powered by batteries, and the power supply batteries of the motor assembly 3 can be two, three, four or more batteries connected in series.

[0051] In some embodiments, the rated operating voltage of the motor assembly 3 is 6-8.4 V or 9-12.6 V. When the rated operating voltage of the motor assembly 3 is 6-8.4 V, the motor assembly 3 is powered by two batteries connected in series. Within this rated operating voltage range, the rated operating current of the motor assembly 3 is 0.1-2.9 A, the rated power of the motor assembly 3 is 0.6-25 W, and the speed of the motor assembly 3 is 14,000-46,000 rpm.

[0052] When the rated operating voltage of the motor assembly 3 is 9-12.6V, the motor assembly 3 is powered by three batteries connected in series. Within this rated operating voltage range, the rated operating current corresponding to the motor assembly 3 is 0.08-2.7A, the rated power corresponding to the motor assembly 3 is 0.7-33W, and the speed of the motor assembly 3 is 14000-48000 rpm.

[0053] When the motor assembly 3 is a three-phase motor and is powered by a battery, the high-speed rotating motor assembly 3 tends to generate a large amount of heat energy inside the motor assembly 3 and the assembly seat 2. By introducing part of the high-pressure airflow generated by the fan blades into the second heat dissipation path, the motor assembly 3 and the assembly seat 2 are cooled, making the working state of the three-phase motor more stable.

[0054] See also Figure 3 , Figure 3 Schematic diagram of the exploded view of the fan assembly of this embodiment.

[0055] like Figure 3 As shown, in some embodiments, the assembly base 2 includes: a connecting cylinder 21, a connecting ring 22, and a hollow tube 23. The connecting cylinder 21 is connected to the fan housing 1 via a plurality of stationary blades 11. One end of the motor assembly 3 is inserted into the connecting cylinder 21, and a second assembly gap H4 is defined between the connecting cylinder 21 and the motor assembly 3. The connecting ring 22 is disposed within the connecting cylinder 21, the hollow tube 23 is connected to the connecting ring 22, and the motor assembly 3 is connected to the hollow tube 23.

[0056] The connection methods between the hollow tube 23 and the connecting ring 22 include (but are not limited to): integral molding, plug-in connection, snap connection, interference fit, welding, screw connection, adhesive connection, etc.

[0057] In some embodiments, the motor assembly 3 includes: a motor stator 32 and a motor rotor 31, the motor stator 32 is connected to the assembly seat 2, the motor rotor 31 is sleeved on the motor stator 32, one end of the motor rotor 31 is inserted into the assembly seat 2, and there is a second assembly gap H4 between the motor rotor 31 and the assembly seat 2.

[0058] The motor stator 32 includes an iron core 322 and a plurality of coils 321 wound around the iron core 322. Since each coil 321 is independently wound around the iron core 322, the gaps between the coils 321 and between the coils 321 and the iron core 322 cannot be completely filled, resulting in coil gaps on the motor stator 32.

[0059] The motor rotor 31 includes: a rotating shaft 313, a magnetic ring 312 and a motor housing 311. One end of the rotating shaft 313 is inserted into the hollow tube 23 and is fixed by connecting with the first bearing 33 and the second bearing 36. The other end of the rotating shaft 313 is connected to the fan blade 4. The motor stator 32 is sleeved on the hollow tube 23 and has an interference fit with the hollow tube 23. The magnetic ring 312 is sleeved on the motor stator 32, and the motor housing 311 is sleeved on the magnetic ring 312. The magnetic ring 312 and the motor stator 32 are magnetically coupled, and the motor housing 311 is interference fit with the magnetic ring 312. The end of the motor housing 311 facing the fan blade 4 is connected to the rotating shaft 313 by an interference fit.

[0060] See also Figure 9 , Figure 9 Schematic diagram of the structure of the motor casing of this embodiment.

[0061] like Figure 9 As shown, in some embodiments, there is a second assembly gap H4 between the motor housing 311 and the assembly seat 2, one end of the motor housing 311 is inserted into the assembly seat 2, and an air inlet opening 314 is opened at one end of the motor housing 311 facing the fan blades 4.

[0062] In some embodiments, the magnetic ring 312 is composed of a plurality of independent magnetic strips, which are connected to the motor housing by gluing, welding, clamping, or other connection methods.

[0063] See also Figure 10 , Figure 10 Schematic diagram of the coil structure and gap indication of this embodiment.

[0064] like Figure 10 As shown, in some embodiments, an air inlet opening 314 is provided on the motor rotor 31 , and a coil gap H5 is provided between the motor stators 32 . The air inlet opening 314 , the coil gap H5 and the first air outlet 24 constitute a first heat dissipation path.

[0065] In this embodiment, the number of air inlet openings 314 is 4. However, the number of air inlet openings 314 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of air inlet openings 314 can be (but not limited to): 1, 2, 3, 5, or more.

[0066] The air inlet opening 314, the coil gap H5 and the first air outlet 24 form a complete air flow channel leading to the external environment. The airflow flows along the first heat dissipation path formed by the air inlet opening 314, the coil gap H5 and the first air outlet 24, which will take away the heat generated by the operation of the motor assembly 3, cool the motor assembly 3, and play a role in air cooling. Since the first heat dissipation path flows out after passing through the motor stator 32, it is equivalent to cooling the inside of the motor assembly 3. Under the condition of the same air volume, the temperature inside the motor assembly 3 is higher, and more heat is taken away by the air cooling inside, and the heat dissipation effect is more obvious. The second heat dissipation path and the first heat dissipation path are respectively outside and inside the fan assembly, dissipating heat from the motor assembly 3, improving the effect of air cooling and heat dissipation, so that the motor assembly 3 can work in a stable and suitable temperature environment, ensuring the working efficiency and stability of the motor assembly 3, and also extending the service life of the motor assembly 3 and the fan assembly.

[0067] In some embodiments, a coupling gap H3 is also defined between the motor stator 32 and the magnetic ring 312. The coupling gap H3 is interconnected with the coil gap H5, thereby expanding the internal assembly gap, thereby increasing the airflow space within the motor assembly, making the airflow smoother and improving the heat dissipation effect.

[0068] In some embodiments, when the magnetic ring 312 is composed of multiple independent magnetic strips, the magnetic ring 312 forms a separation gap. The separation gap spatially expands the coupling gap H3 and the coil gap H5, making the coupling gap H3 and the coil gap H5 larger, and increasing the contact area between the first heat dissipation path and the motor assembly 3, thereby improving the heat dissipation effect.

[0069] When the motor assembly 3 is in working state, the motor rotor 31 rotates around the motor stator 32. The rotation of the motor rotor 31 will drive the airflow flowing through the first heat dissipation path to rotate. The airflow movement path of the first heat dissipation path is spiral. This movement mode makes the contact area between the airflow and the internal structure of the motor assembly 3 larger, and takes away more heat, further improving the cooling effect.

[0070] In some embodiments, one end of the motor rotor 31 facing the fan blade 4 is inserted into the fan blade 4, and a first assembly gap H2 is provided between the fan blade 4 and the motor rotor 31. The first assembly gap H2, the air inlet opening 314, the coil gap H5 and the first air outlet 24 constitute a first heat dissipation path.

[0071] The end of the motor housing 311 facing the fan blades 4 is inserted into the fan blades 4, which can reduce the exposed area of ​​the motor housing 311 and reduce the wind resistance inside the fan housing 1. At the same time, since the internal space of the fan blades 4 is reused, the axial length of the fan assembly is reduced, making the spatial structure of the fan assembly more compact and more compact.

[0072] In some embodiments, the fan assembly further includes: a PCB circuit board 5, the PCB circuit board 5 is connected to one end of the assembly base 2 facing away from the fan blades 4, a second air outlet 51 is provided on the PCB circuit board 5 and / or the assembly base 2, and the first air outlet 24 is connected to the second air outlet 51.

[0073] The PCB 5 is connected to the connecting tube 21 of the mounting base 2. The connection between the PCB 5 and the connecting tube 21 is achieved by screws. However, the connection between the PCB 5 and the connecting tube 21 is not limited to this. Depending on the specific application scenario, in some embodiments, the connection between the PCB 5 and the connecting tube 21 may include (but is not limited to) snap-fitting, welding, riveting, gluing, etc. The connection method between the PCB 5 and the connecting tube 21 can be determined based on the needs of the specific implementation and is not limited to the specific embodiment.

[0074] In some embodiments, when the cross-sectional dimensions of the PCB 5 are the same as or larger than those of the mounting base 2, the PCB 5 is positioned over the mounting base 2. To prevent the PCB 5 from blocking the second, first, and third heat dissipation pathways, a second air outlet 51 is provided in the PCB 5 and / or the mounting base 2.

[0075] In some embodiments, the second air outlet 51 defined in the PCB 5 has multiple functions. For example, the second air outlet 51 can serve as a wiring hole for the PCB 5. Depending on the specific application scenario, the second air outlet 51 may also have other functions, which are not listed here. However, it should be noted that regardless of the different uses of the holes or gaps defined in the PCB 5, as long as they also function to facilitate ventilation and air flow, they are considered second air outlets 51 in this embodiment.

[0076] In some embodiments, the second air outlet 51 is opened on the side wall of the connecting tube 21 .

[0077] In some embodiments, the PCB circuit board 5 and the assembly seat 2 are both provided with second air outlet holes 51 .

[0078] In some embodiments, when the size of the PCB circuit board 5 is smaller than the cross-sectional size of the mounting seat 2 , or the PCB circuit board 5 is mounted above the mounting seat 2 , the second air outlet 51 is the gap between the PCB circuit board 5 and the mounting seat 2 .

[0079] The PCB 5 also generates heat during operation. This heat accumulation can also degrade the PCB's performance and even cause a fire. The PCB 5 is connected to the end of the mounting base 2 facing away from the fan blades 4. A second air outlet 51 is provided on the PCB 5 and / or the mounting base 2. The first air outlet 24 and the second air outlet 51 are connected, allowing airflow from the second, first, and third heat dissipation pathways to exit through the second air outlet 51. This airflow removes heat from the PCB 5, cooling it and ensuring a stable operating environment for the PCB, extending its service life.

[0080] In some embodiments, a plurality of connecting baffles are provided at one end of the assembly seat 2 connected to the PCB circuit board 5, and there is a baffle gap between adjacent connecting baffles among the plurality of connecting baffles. The PCB circuit board 5 is covered on the plurality of connecting baffles, and the PCB circuit board 5 and the baffle gap enclose to form a second air outlet 51.

[0081] The second air outlet 51 is formed by the gap between the PCB 5 and the baffle. The airflow from the first air outlet 24 first contacts the PCB 5 before being blown along the PCB 5 and out of the second air outlet 51. This process increases the contact area and duration of the airflow with the PCB 5, thereby improving heat dissipation efficiency and achieving a more significant cooling effect.

[0082] In some embodiments, the outer diameter of the mounting base 2 is the same as the maximum outer diameter of the hub 41 of the fan blade 4. The maximum outer diameter of the hub 41 is generally located at the end of the hub 41 near the connecting tube 21. The outer diameter of the mounting base 2 is the same as the maximum outer diameter of the hub 41, which can minimize the wind resistance coefficient inside the fan housing 1 and improve the air output efficiency of the fan assembly.

[0083] See also Figure 4 , Figure 4 Schematic diagram of the structure of the fan housing of this embodiment.

[0084] like Figure 4 As shown, a fan assembly includes: a fan housing 1, a motor assembly 3, an assembly base 2, and fan blades 4. The motor assembly 3 is assembled in the fan housing 1; the assembly base 2 is disposed within the fan housing 1 and connected to the fan housing 1 via a plurality of stationary blades 11. The motor assembly 3 is connected to the assembly base 2; the fan blades 4 are connected to the motor assembly 3; and the plurality of stationary blades 11 have guide serrations 111 formed on one end thereof facing the fan blades 4.

[0085] The guide serrations 111 are composed of alternating V-shaped notches and V-shaped tooth marks. In some embodiments, to reduce the aerodynamic noise of the guide serrations 111, the intersections of the V-shaped notches are smoothed, and the apex of the V-shaped tooth marks is also smoothed.

[0086] In the above embodiment, a plurality of stator blades 11 are disposed between the fan housing 1 and the assembly seat 2, and each stator blade 11 has a guide tooth 111 formed on one end facing the fan blade 4. The airflow flowing out of the fan blade 4 has rotational potential energy, and airflow with rotational potential energy will form vortices. The guide teeth 111 are disposed on the stator blade 11. When the guide teeth 111 come into contact with the vortex, the larger vortex is broken up into multiple smaller vortices. When the smaller vortices collide with the stator blade 11, they have less rotational potential energy, and the aerodynamic noise generated by the collision is significantly reduced. At the same time, the stator blade 11 is statically disposed to intercept and guide the airflow. When the airflow comes into contact with the guide tooth 111, part of the airflow is intercepted and guided, while part of the airflow flows through the gap in the guide tooth 111 to the next stator blade 11. Because this part of the airflow has a longer movement space, the position where it collides with the next stator blade 11 is located behind the guide tooth 111 of the stator blade 11. The guide serrations 111 can move the collision position of part of the airflow with the stationary blades 11 backward, dispersing the total potential energy of the collision contact at the same position, and further reducing the aerodynamic noise of the fan assembly.

[0087] In some embodiments, a plurality of moving blades 42 are provided on the fan blade 4 , and a trailing edge serration 421 is provided on one end of the plurality of moving blades 42 facing the assembly seat 2 .

[0088] The fan blades 4 further include a hub 41 , and a plurality of moving blades 42 are arranged around the hub 41 .

[0089] The guide teeth 111 are located on the stationary blades 11, while the trailing edge teeth 421 are located on the moving blades 42. Since airflow possesses rotational potential energy during flow, and this potential energy rotates in the same direction as the moving blades 42, the trailing edge teeth 421 of the moving blades 42 cut the vortex in the same direction. The guide teeth 111 located on the stationary blades 11 cut the vortex in a static interception manner, which is more efficient and significantly breaks up the vortex.

[0090] In this embodiment, the number of movable blades 42 is 9. However, the number of movable blades 42 is not limited to this. Depending on the specific application scenario, the number of movable blades 42 can be 2, 3, 4, 5, 6, 8, or more. The number of movable blades 42 can be determined based on the needs of the specific application scenario and is not limited to the specific embodiment.

[0091] The trailing edge serrations 421 are composed of alternating V-shaped notches and V-shaped tooth marks. In some embodiments, to reduce aerodynamic noise of the trailing edge serrations 421, the intersections of the V-shaped notches are smoothed, and the apex of the V-shaped tooth marks is also smoothed.

[0092] When the fan blade 4 rotates, a vortex is generated at the trailing edge of the blade. A trailing edge serration 421 is provided on the moving blade 42. When the trailing edge serration 421 comes into contact with the vortex, the larger vortex is broken up into multiple smaller vortices, and the aerodynamic noise formed by the smaller vortices is greatly reduced.

[0093] When the trailing edge serrations 421 are provided on the moving blades 42 and the guide serrations 111 are provided on the stationary blades 11 at the same time, the guide serrations 111 can break up and decompose the outflowing vortex, and the guide serrations 111 on the stationary blades 11 further decompose the broken up and decomposed vortex. The two breaking up and decomposition processes miniaturize the vortex inside the fan assembly and reduce the aerodynamic noise of the fan assembly to the greatest extent.

[0094] In some embodiments, each of the multiple stationary blades 11 is bent and extended along the inner surface of the fan casing 1, and the multiple moving blades 42 are bent and extended along the surface of the hub 41 of the fan blade 4, and the bending direction of the multiple stationary blades 11 is opposite to the rotation direction of the multiple moving blades 42.

[0095] In this embodiment, the bending direction of the stationary blade 11 is opposite to the rotational direction of the moving blade 42, which means that the bending direction of the stationary blade 11 and the rotational direction of the moving blade 42 are opposite to each other, and is not limited to the specific embodiment in which the bending direction of the stationary blade 11 is 180 degrees to the rotational direction of the moving blade 42. In some embodiments, when the bending extension line of the stationary blade 11 forms an obtuse angle with the rotational direction of the moving blade 42, it is also within the scope of the definition of "opposite" in this embodiment.

[0096] The bending direction of the static blade 11 is opposite to the rotation direction of the moving blade 42. When the moving blade 42 rotates, it will drive the airflow to rotate in the same direction. At this time, the bending direction of the static blade 11 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the static blade 11. Due to the opposite directions, the angle between the airflow and the curved part of the static blade 11 is greater than 90 degrees. The airflow contacts the static blade 11 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the static blade 11. During the contact process at a larger angle, the static blade 11 has an obvious guiding effect on the airflow, with small energy loss, which greatly improves the air outlet efficiency.

[0097] In some embodiments, the tooth marks of the guide teeth 111 are tilted. The guide teeth 111 are arranged between the fan housing 1 and the assembly seat 2. Therefore, the tooth marks of the guide teeth 111 can be tilted from the fan housing 1 to the assembly seat 2, and can also be tilted from the assembly seat 2 to the fan housing 1.

[0098] In some embodiments, the tooth marks of the trailing edge serrations 421 are tilted. The trailing edge serrations 421 are disposed between the fan housing 1 and the assembly seat 2. Therefore, the tooth marks of the trailing edge serrations 421 can tilt from the fan housing 1 toward the assembly seat 2, and can also tilt from the assembly seat 2 toward the fan housing 1.

[0099] In some embodiments, the tooth marks of the guide serrations 111 are arranged at an inclination, and the tooth marks of the trailing edge serrations 421 are also arranged at an inclination.

[0100] In some embodiments, the tooth marks of the guide serrations 111 and the tooth marks of the trailing edge serrations 421 have the same inclination direction.

[0101] When the inclination directions of the tooth marks of the guide serrations 111 and the trailing edge serrations 421 are consistent, the guide serrations 111 and the trailing edge serrations 421 can perform secondary decomposition on the airflow with the same flow direction, making the decomposition effect of the vortex directed in the inclination direction more obvious.

[0102] In some embodiments, the tooth marks of the guide serrations 111 and the tooth marks of the trailing edge serrations 421 are inclined in opposite directions.

[0103] When the inclination directions of the tooth marks of the guide serration 111 and the trailing edge serration 421 are opposite, the guide serration 111 and the trailing edge serration 421 can respectively break up and decompose the vortex directed by their inclination directions, so that the area of ​​the vortex broken up and decomposed by the guide serration 111 and the trailing edge serration 421 is wider.

[0104] In some embodiments, the tooth marks of the guide serrations 111 are inclined toward the fan housing 1 , and the tooth marks of the trailing edge serrations 421 are inclined toward the fan housing 1 .

[0105] The direction of the airflow flowing out of the fan blades 4 is a spiral motion from the fan blades 4 toward the fan housing 1. The tooth marks of the guide serrations 111 are inclined toward the fan housing 1, so that the inclination direction of the tooth marks of the guide serrations 111 is consistent with the flow direction of the airflow, thereby increasing the contact area between the tooth marks of the guide serrations 111 and the airflow, and making the tooth marks of the guide serrations 111 more efficient in breaking up and decomposing the airflow. The corresponding tooth marks of the trailing edge serrations 421 are also inclined toward the fan housing 1, similarly making the inclination direction of the tooth marks of the trailing edge serrations 421 consistent with the flow direction of the airflow, thereby increasing the contact area between the tooth marks of the trailing edge serrations 421 and the airflow, and making the tooth marks of the trailing edge serrations 421 more efficient in breaking up and decomposing the airflow. At the same time, since the inclination directions of the two are the same as the flow direction of the airflow, the wind resistance of the guide serrations 111 and the trailing edge serrations 421 to the airflow is reduced, thereby improving the air outlet efficiency. The tooth marks of the guide serrations 111 and the trailing edge serrations 421 are both inclined toward the fan housing 1 , which can perform secondary decomposition on the airflow with the same flow direction, making the decomposition effect of the vortex directed in the inclined direction more obvious.

[0106] In some embodiments, the tooth marks of the guide serrations 111 are inclined toward the fan housing 1 , and the tooth marks of the trailing edge serrations 421 are inclined toward the assembly seat 2 .

[0107] The direction of the airflow flowing out of the fan blades 4 is the spiral motion of the fan blades 4 toward the fan housing 1. The tooth marks of the guide serrations 111 are inclined toward the fan housing 1, so that the inclination direction of the tooth marks of the guide serrations 111 is consistent with the flow direction of the airflow, thereby increasing the contact area between the tooth marks of the guide serrations 111 and the airflow, and making the tooth marks of the guide serrations 111 more efficient in breaking up and decomposing the airflow. The tooth marks of the trailing edge serrations 421 are inclined toward the assembly seat 2, and their inclination direction is opposite to the direction of airflow movement. The tooth marks set in opposite directions can decompose and break up the laterally moving airflow multiple times, and the decomposition and breaking up of the vortex is more thorough. At the same time, the guide serrations 111 and the trailing edge serrations 421 can respectively break up and decompose the vortex pointed to by their inclination directions, so that the vortex area broken up and decomposed by the guide serrations 111 and the trailing edge serrations 421 is wider.

[0108] In some embodiments, the tooth marks of the guide serrations 111 are inclined toward the mounting seat 2, and the tooth marks of the trailing edge serrations 421 are inclined toward the fan housing 1. The guide serrations 111 and the trailing edge serrations 421 can respectively break up and decompose the vortex in the direction of their respective inclinations, so that the vortexes broken up and decomposed by the guide serrations 111 and the trailing edge serrations 421 have a wider area.

[0109] In some embodiments, the tooth marks of the guide serrations 111 and the tooth marks of the trailing edge serrations 421 are both inclined toward the assembly seat 2 .

[0110] In some embodiments, the tooth marks of the guide serrations 111 correspond to the tooth marks of the trailing edge serrations 421 .

[0111] In this embodiment, the tooth marks of the guide saw tooth 111 and the tooth marks of the trailing edge saw tooth 421 correspond to each other, which means that the tooth mark of the trailing edge saw tooth 421 is set at the position where the extension line of the tooth mark of the guide saw tooth 111 intersects with the trailing edge saw tooth 421; conversely, the tooth mark of the guide saw tooth 111 is set at the position where the extension line of the tooth mark of the trailing edge saw tooth 421 intersects with the guide saw tooth 111.

[0112] The tooth marks of the guide teeth 111 correspond to the tooth marks of the trailing edge teeth 421. The tooth marks of the trailing edge teeth 421 have the function of dividing the airflow. The divided airflow will re-converge at the guide teeth 111. The converged airflow will be further dispersed and divided by the tooth marks of the guide teeth 111, preventing the vortex from re-converging and improving the vortex division effect.

[0113] In some embodiments, the tooth marks of the guide serrations 111 and the tooth marks of the trailing edge serrations 421 are staggered with each other.

[0114] In this embodiment, the tooth marks of the guide saw tooth 111 and the tooth marks of the trailing edge saw tooth 421 are staggered with each other, which means that a gap of the trailing edge saw tooth 421 is provided at the position where the extension line of the tooth mark of the guide saw tooth 111 intersects with the trailing edge saw tooth 421; conversely, a gap of the guide saw tooth 111 is provided at the position where the extension line of the tooth mark of the trailing edge saw tooth 421 intersects with the guide saw tooth 111.

[0115] The tooth marks of the guide serrations 111 and the tooth marks of the trailing edge serrations 421 are staggered with each other. Both the tooth marks of the trailing edge serrations 421 and the tooth marks of the guide serrations 111 have the function of dividing the airflow. The staggered arrangement of the two can separate the vortices at different positions, increase the dividing area of ​​the vortex, and further reduce the aerodynamic noise.

[0116] In some embodiments, the ratio of the length of the stationary blade 11 to the length of the moving blade 42 is 1.1-2.8. The length of the stationary blade 11 refers to the length from one end of the stationary blade 11 where the guide serrations 111 are provided to the opposite end. The length of the moving blade 42 refers to the length from one end of the moving blade 42 where the trailing edge serrations 421 are provided to the opposite end.

[0117] At this length ratio, the length of the stator blades 11 is greater than that of the rotor blades 42. When the fan blades 4 rotate, the rotor blades 42 constrain and guide the airflow. Excessive length of the rotor blades 42 can result in excessive rotational potential energy. The stator blades 11 primarily function to offset and convert this rotational potential energy, causing it to move horizontally along the stator blades 11. If the stator blades 11 are too short, the airflow exiting the fan assembly will have excessive rotational potential energy, resulting in poor directional movement and a short directional airflow distance.

[0118] Setting the ratio of the length of the stationary blades 11 to the length of the moving blades 42 between 1.1 and 2.8 allows the rotational potential energy of the airflow exiting the fan blades 4 to be fully offset and converted when passing through the moving blades 42, thereby improving the overall air output efficiency and directional air supply capability of the fan assembly. At the same time, the airflow is blown out from the fan blades 4 and guided by the stationary blades 11. During this process, due to the setting of the assembly seat 2, the airflow flow space is compressed, and the airflow is pressurized and accelerated. The length of the stationary blades 11 is relatively large, corresponding to the path length required for its acceleration, thereby improving the airflow acceleration efficiency.

[0119] When the ratio is less than 1.1, the rotational potential energy of the airflow from the fan assembly is too great, the diffusion area after the airflow is blown out is too large, and the directional air supply capability is reduced. When the ratio is greater than 2.8, the fan assembly loses too much energy within the fan housing 1, the initial kinetic energy of the airflow at the fan assembly outlet is reduced, and the directional air supply capability of the fan assembly is also reduced.

[0120] In some embodiments, the ratio of the number of stationary blades 11 to the number of moving blades 42 is 0.5-1.

[0121] When the ratio of the number of stator blades 11 to the number of moving blades 42 is within a numerical range, the fan assembly's air volume and pressure can be increased, resulting in a higher velocity of the airflow from the fan assembly. When the ratio of the number of stator blades 11 to the number of moving blades 42 is less than 0.5, the number of stator blades 11 is too small, and the stator blades 11 do not fully offset and convert the rotational potential energy of the airflow, reducing the fan assembly's directional air delivery capability. When the ratio of the number of stator blades 11 to the number of moving blades 42 is greater than 1, the number of stator blades 11 is too large, increasing the wind resistance of the airflow and reducing the efficiency of airflow conversion.

[0122] See also Figure 12 , Figure 12 Schematic diagram of the empty tube structure in this embodiment.

[0123] like Figure 12As shown, a fan assembly includes: a fan housing 1, an assembly base 2 and a motor assembly 3. The assembly base 2 is arranged in the fan housing 1, and the assembly base 2 is connected to the fan housing 1 through a plurality of stationary blades 11; the motor assembly 3 is assembled in the fan housing 1; the assembly base 2 is provided with a hollow tube 23, the motor assembly 3 is connected to the hollow tube 23, a first bearing 33 and a support member 35 are provided in the hollow tube 23, one end of the rotating shaft 313 of the motor assembly 3 is inserted into and passes through the support member 35 and the first bearing 33 in sequence, the other end of the rotating shaft 313 extends out of the hollow tube 23, the fan blade 4 is connected to the end of the rotating shaft 313 extending out of the hollow tube 23, a first elastic member 34 is compressed and arranged between the first bearing 33 and the support member 35, one end of the first elastic member 34 is connected to the support member 35, and the other end of the first elastic member 34 is connected to the first inner ring or the first outer ring of the first bearing 33.

[0124] In some embodiments, the assembly base 2 only includes a hollow tube 23 . One end of the plurality of stationary blades 11 is connected to the hollow tube 23 , and the other ends of the plurality of stationary blades 11 are radially distributed and connected to the fan housing 1 .

[0125] In some embodiments, the assembly seat 2 includes: a connecting tube 21, a connecting ring 22 and a hollow tube 23, the connecting tube 21 is arranged in the fan casing 1, the connecting tube 21 is connected to the fan casing 1 through a plurality of static blades 11, the connecting ring 22 is arranged in the connecting tube 21, the hollow tube 23 is connected to the connecting ring 22, and the motor assembly 3 is connected to the hollow tube 23.

[0126] In some embodiments, the assembly seat 2 includes: a connecting ring 22 and a hollow tube 23 , the connecting ring 22 is connected to the fan housing 1 through a plurality of stationary blades 11 , the hollow tube 23 is connected to the connecting ring 22 , and the motor assembly 3 is connected to the hollow tube 23 .

[0127] The connection methods between the hollow tube 23 and the connecting ring 22 include (but are not limited to): integral molding, plug-in connection, snap connection, interference fit, welding, screw connection, adhesive connection, etc.

[0128] In this embodiment, the first elastic member 34 is (but not limited to): a coil spring and a rubber spring. The material and structure of the first elastic member 34 can be determined according to the requirements of the specific application scenario and are not limited to the specific embodiment.

[0129] The first elastic member 34 is sleeved on the rotating shaft 313. However, the arrangement of the first elastic member 34 is not limited thereto. Depending on the specific application scenario, in some embodiments, a plurality of first elastic members 34 are provided, and the plurality of first elastic members 34 are arranged around the rotating shaft 313 and respectively connected to the support member 35 and the first bearing 33.

[0130] In this embodiment, the first bearing 33 is disposed at the first hollow end 231 of the hollow tube 23 . However, the location of the first bearing 33 is not limited thereto. In some embodiments, the first bearing 33 is disposed at the second hollow end 232 of the hollow tube 23 .

[0131] In this embodiment, the connection between the first elastic member 34 and the support member 35 includes (but is not limited to): abutment, welding, adhesive connection or integral molding.

[0132] In this embodiment, the connection between the first elastic member 34 and the first bearing 33 includes (but is not limited to): abutment, welding or adhesive connection.

[0133] In some embodiments, the motor assembly 3 is a three-phase motor, which has a higher rotation speed, thereby increasing the air output rate and air output volume of the fan assembly.

[0134] In some embodiments, the motor assembly 3 is powered by batteries, and the power supply batteries of the motor assembly 3 can be two, three, four or more batteries connected in series.

[0135] In some embodiments, the rated operating voltage of the motor assembly 3 is 6-8.4 V or 9-12.6 V. When the rated operating voltage of the motor assembly 3 is 6-8.4 V, the motor assembly 3 is powered by two batteries connected in series. Within this rated operating voltage range, the rated operating current of the motor assembly 3 is 0.1-2.9 A, the rated power of the motor assembly 3 is 0.6-25 W, and the speed of the motor assembly 3 is 14,000-46,000 rpm.

[0136] When the rated operating voltage of the motor assembly 3 is 9-12.6V, the motor assembly 3 is powered by three batteries connected in series. Within this rated operating voltage range, the rated operating current corresponding to the motor assembly 3 is 0.08-2.7A, the rated power corresponding to the motor assembly 3 is 0.7-33W, and the speed of the motor assembly 3 is 14000-48000 rpm.

[0137] When the motor assembly 3 is a three-phase motor and powered by a battery, the high-speed rotation of the motor assembly 3 is easily affected by subtle vibrations, resulting in high aerodynamic noise and abnormal vibrations in the fan assembly. The first elastic member 34 is arranged to abut against the first bearing 33 to reduce abnormal vibrations caused by bearing structural design defects or errors, significantly reducing the aerodynamic noise of the fan assembly and improving the stability of the fan assembly's rotation.

[0138] In the above embodiment, the first elastic member 34 is positioned between the support member 35 and the first bearing 33, with one end of the elastic member connected to the support member 35 and the other end connected to the first inner ring or the first outer ring of the first bearing 33. The first elastic member 34 is compressed between the first bearing 33 and the support member 35, constantly subjecting the first inner ring or the first outer ring of the first bearing 33 to an elastic force. This force acts on the first inner ring or the first outer ring, ensuring that the first bearing 33 is always in a state that bridges the axial gap between the first inner ring and the first outer ring. Specifically, the balls between the first inner ring and the first outer ring are always clamped, and the axial gap between the first inner ring and the first outer ring is minimized. This state reduces the axial displacement of the rotating shaft 313 of the motor assembly 3 during rotation, significantly reduces the vibration frequency of the fan blades 4, and eliminates any abnormal noise in the fan assembly caused by displacement of the inner and outer rings of the bearing. Furthermore, wear on the first bearing 33 is reduced, extending its service life.

[0139] In some embodiments, the fan assembly also includes: a second bearing 36, the first bearing 33 and the second bearing 36 are respectively arranged at both ends of the hollow tube 23, the support member 35 is arranged between the first bearing 33 and the second bearing 36, and one end of the rotating shaft 313 is inserted into and out of the second bearing 36, the support member 35 and the first bearing 33 in sequence.

[0140] The arrangement of the first bearing 33 and the second bearing 36 can make the rotation of the rotating shaft 313 smoother. At the same time, the arrangement of the two rotating shafts 313 makes the linear rotation of the rotating shaft 313 more stable, which can make the rotation speed of the fan motor faster.

[0141] In some embodiments, the first supporting end 351 of the support member 35 abuts against the second inner ring or the second outer ring of the second bearing 36 , and the second supporting end 352 of the support member 35 is connected to the first elastic member 34 .

[0142] To prevent axial displacement between the inner and outer rings of the second bearing 36, the first support end 351 of the support member 35 abuts the second inner or outer ring of the second bearing 36. The abutment of the second outer ring of the second bearing 36 by the support member 35 also ensures that the second inner or outer ring of the second bearing 36 is constantly subjected to an external force pulling it toward each other in the axial direction. This force acts on the second inner or outer ring, ensuring that the axial gap between the second inner and outer rings of the second bearing 36 is always closed. This means that the balls between the second inner and outer rings are always clamped, and the axial gap between the second inner and outer rings is minimized. This condition reduces the possibility of axial displacement of the motor assembly 3's rotating shaft 313, significantly reduces the vibration frequency of the fan blades 4, and eliminates any abnormal noise in the fan assembly caused by displacement of the bearing's inner and outer rings. Furthermore, wear on the second bearing 36 is reduced, extending its service life.

[0143] In some embodiments, a second elastic member (not shown) is compressed and arranged between the support member 35 and the second bearing 36, one end of the second elastic member is connected to the first support end 351 of the support member 35, and the other end of the second elastic member is connected to the second inner ring and the second outer ring of the second bearing 36.

[0144] In this embodiment, the second elastic member is (but not limited to): a coil spring and a rubber spring. The material and structure of the second elastic member can be determined according to the requirements of the specific application scenario and are not limited to the specific embodiment.

[0145] The second elastic member is sleeved on the rotating shaft 313. However, the arrangement of the second elastic member is not limited thereto. Depending on the specific application scenario, in some embodiments, a plurality of second elastic members are provided, and the plurality of second elastic members are arranged around the rotating shaft 313 and respectively connected to the support member 35 and the second bearing 36.

[0146] In this embodiment, the second bearing 36 is arranged at the second hollow end 232 of the hollow tube 23. However, the setting position of the second bearing 36 is not limited to this. In some embodiments, the positions of the first bearing 33 and the second bearing 36 can be interchanged, and the second bearing 36 is arranged at the first hollow end 231 of the hollow tube 23.

[0147] In some embodiments, the second elastic member can be disposed between the second bearing and the motor housing 311 , with one end of the second elastic member abutting against the inner ring or outer ring of the second bearing and the other end connected to the motor housing 311 .

[0148] To prevent axial displacement between the inner and outer rings of the second bearing 36, a second elastic member is positioned between the support member 35 and the second bearing 36. One end of the second elastic member is connected to the second support end 352 of the support member 35, and the other end is connected to the second inner or outer ring of the second bearing 36. The connection to the second elastic member ensures that the second outer ring of the second bearing 36, or the compressed second inner ring, is constantly subjected to an axial force pulling it closer together. This force acts to close the axial gap between the second inner and outer rings of the second bearing 36. This ensures that the balls between the second inner and outer rings are always clamped, minimizing the axial gap between them. This minimizes the axial displacement of the motor assembly 3's rotating shaft 313, significantly reducing the vibration frequency of the fan blades 4 and eliminating any abnormal noise in the fan assembly caused by displacement of the bearing's inner and outer rings. Furthermore, wear on the second bearing 36 is reduced, extending its service life.

[0149] The second elastic member is arranged between the second bearing and the motor housing 311 , which can also minimize the axial gap between the second inner ring and the second outer ring.

[0150] In this embodiment, the connection between the second elastic member and the support member 35 includes (but is not limited to): abutment, welding, adhesive connection or integral molding.

[0151] In this embodiment, the connection between the second elastic member and the second bearing 36 includes (but is not limited to): abutment, welding or adhesive connection.

[0152] In some embodiments, the support member 35 has an interference fit with the hollow tube 23. The support member 35 has an interference fit with the hollow tube 23, and the relative position between the support member 35 and the hollow tube 23 is fixed, so that the first elastic member 34 and the second elastic member remain in a compressed state.

[0153] The support member 35 in this embodiment is an independent circular ring structure disposed in the hollow tube 23, and the support member 35 is sleeved on the rotating shaft 313. However, the arrangement of the support member 35 is not limited to this. Depending on the specific application scenario, in some embodiments, the support member 35 is a protruding block or a protruding ring formed by the internal protrusion of the hollow tube 23.

[0154] See also Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the support structure of this embodiment; Figure 8 This is a schematic cross-sectional view of the support member of this embodiment.

[0155] like Figure 7and Figure 8 As shown, in some embodiments, the thickness of the first supporting end 351 of the supporting member 35 gradually decreases along the direction from the second supporting end 352 to the first supporting end 351 .

[0156] When the support member 35 is an independently constructed annular structure, the support member 35 needs to be assembled into the hollow tube 23 through the first hollow end 231 or the second hollow end 232, and pushed to a fixed position, and form an interference fit connection with the hollow tube 23 at this position. In order to facilitate the assembly of the support member 35, the first support end 351, which serves as the head structure of the support member 35, needs to have a certain degree of deformation ability to adapt to the smooth assembly when there is an error in the inner diameter of the hollow tube 23. The thickness of the first support end 351 of the support member 35 gradually decreases from the second support end 352 to the first support end 351. This makes the first support end 351 convenient for introduction and assembly. At the same time, the thickness gradually decreases, so that the first support end 351 has the characteristic of being easier to deform after being compressed, and can adapt to the assembly apertures with errors in different hollow tubes 23 to the greatest extent. This improves the assembly efficiency of the support member 35.

[0157] In some embodiments, the support member 35 is provided with a first deformation notch 353 at the second support end 352. The provision of the first deformation notch enables the second support end 352 of the support member 35 to also have the ability to deform after being squeezed, so that the second support end 352 has the function of convenient introduction and assembly. It can adapt to the assembly apertures with errors in different hollow tubes 23 to the greatest extent. It improves the assembly efficiency of the support member 35. At the same time, the support member 35 with the first deformation notch 353, after being subjected to an external force directed from the first support end 351 to the second support end 352, the position where the second support end 352 is connected to the hollow tube 23 will be turned outward toward the hollow tube 23, forming a trumpet-shaped structure that hinders external forces, thereby improving the assembly stability and resistance to external forces of the support member 35.

[0158] In some embodiments, the support member 35 is provided with a second deformation notch 354 at the second support end 352. The second deformation notch 354 has the same function as the first deformation notch 353, and will not be described in detail herein.

[0159] In some embodiments, the outer surface of the support member 35 is raised to form ridges 355. The provision of the ridges 355 reduces the contact area between the support member 35 and the hollow tube 23. The space between the ridges 355 can serve as space for the ridges 355 to deform after being subjected to force, thereby reducing assembly resistance, improving assembly efficiency, and reducing the risk of the support member 35 bursting through the hollow tube 23 during assembly.

[0160] In some embodiments, the first deformation notch 353 and the second deformation notch 354 are disposed opposite to each other, thereby maximizing the deformation range of the second support end 352 .

[0161] In some embodiments, the protrusion height of the ridge 355 gradually decreases from the second support end 352 to the first support end 351 .

[0162] Because the support member 35 is assembled with the second support end 352 toward the first support end 351, the height of the ridge 355 gradually decreases along the direction from the second support end 352 to the first support end 351. That is, the position of the ridge 355 with the lowest height first contacts the hollow tube 23 during assembly. This reduces assembly difficulty, as the assembly resistance gradually increases with increasing assembly depth, reducing the risk of the hollow tube 23 bursting during assembly.

[0163] In some embodiments, the end of the ridge 355 facing the first support end 351 forms a smooth transition with the surface of the support member 35. Because the support member 35 is assembled with the second support end 352 facing the first support end 351, the smooth transition between the end of the ridge 355 facing the first support end 351 and the surface of the support member 35 effectively reduces assembly resistance and improves assembly efficiency. This also prevents protruding foreign matter from scratching the inner wall of the hollow tube 23 during assembly.

[0164] In some embodiments, the motor assembly 3 includes: a coil 321 , which is sleeved on the hollow tube 23 , and a support member 35 and a second bearing 36 are located at a connection position between the coil 321 and the hollow tube 23 .

[0165] The coil 321 is sleeved on the hollow tube 23, and the connection between the two is an interference fit. Because the hollow tube 23 is hollow, its strength is relatively weak compared to a solid structure of the same material. When subjected to a large external force, there is a risk of partial collapse. The support member 35 and the second bearing 36 are located at the connection between the coil 321 and the hollow tube 23. The support member 35 and the second bearing 36 support the hollow tube 23, increasing the strength of the hollow tube 23 and reducing the risk of collapse of the hollow tube 23 under stress.

[0166] In some embodiments, the support member 35 is assembled from the second hollow end 232 of the hollow tube 23 toward the first hollow end 231 . Since the assembly directions are opposite, the support member 35 is assembled after being reversed accordingly.

[0167] like Figure 2As shown, a fan assembly includes: a fan housing 1, an assembly base 2, a motor assembly 3, and fan blades 4. The assembly base 2 is disposed within the fan housing 1 and is connected to the fan housing 1 via a plurality of stationary blades 11. One end of the motor assembly 3 is inserted into and connected to the assembly base 2. The other end of the motor assembly 3 is inserted into and connected to the fan blades 4.

[0168] In some embodiments, the motor assembly 3 is a three-phase motor, which has a higher rotation speed, thereby increasing the air output rate and air output volume of the fan assembly.

[0169] In some embodiments, the motor assembly 3 is powered by batteries, and the power supply batteries of the motor assembly 3 can be two, three, four or more batteries connected in series.

[0170] In some embodiments, the rated operating voltage of the motor assembly 3 is 6-8.4 V or 9-12.6 V. When the rated operating voltage of the motor assembly 3 is 6-8.4 V, the motor assembly 3 is powered by two batteries connected in series. Within this rated operating voltage range, the rated operating current of the motor assembly 3 is 0.1-2.9 A, the rated power of the motor assembly 3 is 0.6-25 W, and the speed of the motor assembly 3 is 14,000-46,000 rpm.

[0171] When the rated operating voltage of the motor assembly 3 is 9-12.6V, the motor assembly 3 is powered by three batteries connected in series. Within this rated operating voltage range, the rated operating current corresponding to the motor assembly 3 is 0.08-2.7A, the rated power corresponding to the motor assembly 3 is 0.7-33W, and the speed of the motor assembly 3 is 14000-48000 rpm.

[0172] When the motor assembly 3 is a three-phase motor and is powered by a battery, the fan assembly not only has requirements on the rotation speed, but also the energy consumption of the fan assembly must be considered. By improving the assembly structure of the motor assembly 3 and the fan blades 4, the torque required for the fan blades 4 to rotate is reduced, and the kinetic energy required for the fan blades 4 to rotate is reduced. This reduces the energy consumption of the fan assembly and gives the fan assembly a longer endurance. At the same time, due to the reduction in torque, the rotational posture stability of the fan blades 4 can be made higher when rotating at high speed, reducing the probability of abnormal shaking of the fan assembly.

[0173] The high-speed rotating motor assembly 3 easily generates a large amount of heat energy inside the motor assembly 3 and the assembly seat 2. By introducing part of the high-pressure airflow generated by the fan blades into the first heat dissipation path, the motor assembly 3 and the assembly seat 2 are cooled, making the working state of the three-phase motor more stable.

[0174] In the above embodiment, one end of the motor assembly 3 is inserted into the assembly seat 2, and the other end of the motor assembly 3 is inserted into the fan blades 4. This structure makes the area covered by the fan blades 4 on the motor assembly 3 smaller than that in the solution in which the motor assembly 3 is completely inserted into the fan blades 4, thereby reducing the length of the fan blades 4 in the axial direction. The reduction in the axial length of the fan blades 4 shortens the entire fan blade 4 rotation force arm, thereby reducing the rotational torque of the fan blades 4. The rotational torque of the fan blades 4 is reduced, and the fan blades 4 rotate faster under the same output environment of the motor assembly 3. The reduction in the rotational torque of the fan blades 4 will reduce the abnormal centrifugal force caused by the imbalance of the fan blades 4, making the rotation of the fan blades 4 more stable, reducing the probability of abnormal vibration of the fan blades 4, and reducing the rotation noise of the fan blades 4.

[0175] In some embodiments, a connecting shaft column 43 and multiple reinforcing ribs 411 are provided in the fan blade 4, and the multiple reinforcing ribs 411 are arranged around the connecting shaft column 43. The motor assembly 3 abuts against the connecting shaft column 43 and / or the multiple reinforcing ribs 411 to reduce the rotational torque of the fan blade 4.

[0176] The fan blades 4 include a hub 41 and a plurality of moving blades 42. The moving blades 42 are spaced apart on the surface of the hub 41. The hub 41 is hollow inside, and a connecting shaft 43 is arranged at the center of the hub 41.

[0177] The motor assembly 3 includes a motor stator 32 and a motor rotor 31. The motor stator 32 is connected to the assembly base 2. The motor rotor 31 is sleeved on the motor stator 32, and one end of the motor rotor 31 is inserted into the assembly base 2. The motor stator 32 includes an iron core 322 and a plurality of coils 321 wound around the iron core 322.

[0178] The motor stator 32 includes an iron core 322 and a plurality of coils 321 wound around the iron core 322. The iron core 322 is sleeved on the hollow tube 23.

[0179] The motor rotor 31 includes: a rotating shaft 313, a magnetic ring 312 and a motor housing 311. One end of the rotating shaft 313 is inserted into the hollow tube 23 and fixed by connecting with the first bearing 33 and the second bearing 34. The other end of the rotating shaft 313 is connected to the connecting shaft column 43 of the fan blade 4. The motor stator 32 is sleeved on the hollow tube 23 and has an interference fit with the hollow tube 23. The magnetic ring 312 is sleeved on the motor stator 32, and the motor housing 311 is sleeved on the magnetic ring 312. The magnetic ring 312 and the motor stator 32 are magnetically coupled, and the motor housing 311 is interference fit with the magnetic ring 312. The end of the motor housing 311 facing the fan blade 4 is connected to the rotating shaft 313 by an interference fit.

[0180] One end of the motor housing 311 in the motor assembly 3 is inserted into the assembly seat 2, and the other end is inserted into the hub 41 of the fan blade 4. The end of the motor housing 311 inserted into the fan blade 4 abuts against the connecting shaft 43 and / or multiple reinforcing ribs 411.

[0181] In this embodiment, when the motor assembly 3 is working, the motor stator 32 first performs electromagnetic conversion, driving the motor housing 311 with the magnetic ring 312 to rotate; then the motor housing 311 drives the rotating shaft 313 to rotate; finally, the rotating shaft 313 drives the fan blades 4 to rotate. One end of the motor housing 311 inserted into the fan blades 4 abuts against the connecting shaft column 43 and / or multiple reinforcing ribs 411. When the motor housing 311 rotates, friction is generated between the connecting shaft column 43 and / or multiple reinforcing ribs 411. When the motor housing 311 rotates at the same frequency as the fan blades 4, this friction is converted into the rotation driving force of the fan blades 4, which is equivalent to increasing the radial contact area between the rotating shaft 313 and the fan blades 4, making the rotation of the fan blades 4 more stable.

[0182] In some embodiments, the hub 41 of the fan blade 4 is configured to be conical, truncated cone, hemispherical, or bullet-shaped. This structure causes the force arms between different parts of the hub 41 and the rotating shaft 313 to be of different sizes when the fan blade 4 rotates. The position of the hub 41 where the motor housing 311 is inserted at one end has the largest torque, and the corresponding torque is also larger. The torques at different positions of the hub 41 are different, and excessive torque differences will cause the fan blade 4 to rotate unstably. The end of the motor housing 311 inserted into the fan blade 4 abuts against the connecting shaft 43 and / or multiple reinforcing ribs 411, which is equivalent to reducing the torque at the end of the hub 41, reducing the torque gap at different positions of the hub 41, and making the fan blade 4 rotate more stably.

[0183] In some embodiments, when the motor housing 311 abuts against the reinforcing rib 411 , the motor housing 311 only abuts against a portion of the structure of the reinforcing rib 411 .

[0184] In some embodiments, the length of the motor assembly 3 inserted into the assembly seat 2 is greater than the length of the motor assembly 3 inserted into the fan blade 4 .

[0185] The length of the motor assembly 3 inserted into the mounting base 2 is greater than the length of the motor assembly 3 inserted into the fan blades 4. This structure maintains the axial length of the fan blades 4 within the optimal range, maximizing the speed of the fan blades 4 under the same output conditions, making the fan blades 4 rotate more stably and with less noise.

[0186] In some embodiments, the outer diameter of the mounting base 2 is the same as the maximum outer diameter of the hub 41 of the fan blade 4. The maximum outer diameter of the hub 41 is generally located at the end of the hub 41 near the connecting tube 21. The outer diameter of the mounting base 2 is the same as the maximum outer diameter of the hub 41, which can minimize the wind resistance coefficient inside the fan housing 1 and improve the air output efficiency of the fan assembly.

[0187] 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.

[0188] Example 2

[0189] A blowing device includes the fan assembly in Example 1, wherein the fan assembly serves as a core module component for assembling the blowing device.

[0190] It should be pointed out that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck hanging fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to help air circulation.

[0191] The fan assembly in Example 1 is assembled inside the housing of the above product.

[0192] The fan blades of the fan assembly of the blowing device in this embodiment rotate under the drive of the motor assembly, and the rotation of the fan blades thereby pushes the airflow in the fan housing to move in a directional manner. Airflow is a fluid, and the unique flow characteristics of the fluid will cause the airflow to flow to any airflow channel connected to the external environment. Under the action of wind pressure, the airflow enters the interior of the motor assembly along the air inlet opening of the motor assembly, and flows out from the interior of the motor assembly through the internal assembly gap and the first air outlet. The above-mentioned flow of airflow will take away the heat generated by the operation of the motor assembly, cool the motor assembly, and play a role in air cooling. Since the first heat dissipation path cools the interior of the motor assembly, under the condition of equal air volume, since the temperature inside the motor assembly is higher, more heat is taken away by air cooling, and the heat dissipation effect is more obvious.

[0193] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of this application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to be additional limitations on the content of this application. The purpose of providing these embodiments is to make the understanding of the disclosure of this application more thorough and comprehensive. In addition, the above-mentioned technical features can be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of this application; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A fan assembly, characterized in that: include: fan housing; An assembly seat, the assembly seat is arranged in the fan housing, and the assembly seat is connected to the fan housing through a plurality of stationary blades; a motor assembly, the motor assembly being assembled in the fan housing; fan blades, the fan blades being connected to the motor assembly; The motor assembly is provided with an air inlet opening connecting the interior of the fan housing and the interior of the motor assembly. The interior of the motor assembly is provided with an internal assembly gap for air flow. The assembly seat is provided with a first air outlet. The air inlet opening, the internal assembly gap and the first air outlet constitute a first heat dissipation path.

2. The fan assembly according to claim 1, wherein: The motor assembly includes: a motor stator and a motor rotor, the motor stator is connected to the assembly seat, the motor rotor is sleeved on the motor stator, one end of the motor rotor is inserted into the assembly seat, the air inlet opening is opened on the motor rotor, a coil gap is formed between the motor stators, and the air inlet opening, the coil gap and the first air outlet constitute the first heat dissipation path; and / or, The plurality of stationary blades are formed with guide serrations at one end facing the fan blade; and / or, The assembly seat is provided with a hollow tube, the motor assembly is connected to the hollow tube, a first bearing and a support member are provided in the hollow tube, one end of the rotating shaft of the motor assembly is inserted into and passes through the support member and the first bearing in sequence, the other end of the rotating shaft extends out of the hollow tube, the fan blades are connected to the end of the rotating shaft extending out of the hollow tube, a first elastic member is compressed and arranged between the first bearing and the support member, one end of the first elastic member is connected to the support member, and the other end of the first elastic member is connected to the first inner ring or the first outer ring of the first bearing.

3. The fan assembly according to claim 2, wherein: A coupling gap is provided between the motor stator and the motor rotor, and the coupling gap is communicated with the coil gap; and / or, The motor rotor comprises: a magnetic ring and a motor housing, the magnetic ring is sleeved on the motor stator, the motor housing is sleeved on the magnetic ring, one end of the motor housing is inserted into the assembly seat, and the air inlet opening is opened at one end of the motor housing facing the fan blades; and / or, The motor assembly further includes: a rotating shaft, one end of the rotating shaft being connected to the assembly seat, the other end of the rotating shaft being connected to the fan blade, the motor rotor being connected to the rotating shaft, one end of the motor rotor facing the fan blade being inserted into the fan blade, a first assembly gap being defined between the fan blade and the motor rotor, the first assembly gap, the air inlet opening, the coil gap, and the first air outlet forming a first heat dissipation path; and / or, The fan assembly further includes: a PCB circuit board, the PCB circuit board is connected to an end of the assembly seat facing away from the fan blades, a second air outlet is formed on the PCB circuit board and / or the assembly seat, and the first air outlet is connected to the second air outlet; and / or, Each of the plurality of stationary blades is curved and extended along the inner surface of the fan casing, and the plurality of moving blades are curved and extended along the hub surface of the fan blades, and the curvature direction of the plurality of stationary blades is opposite to the rotation direction of the plurality of moving blades; and / or, The tooth marks of the guide teeth are arranged obliquely; and / or, The end of the moving blade is provided with a trailing edge serration, and the tooth marks of the trailing edge serration are arranged obliquely; and / or, The ratio of the length of the stationary blade to the length of the moving blade is 1.1-2.8; and / or, The ratio of the number of the stationary blades to the number of the moving blades is 0.5-1; and / or, The fan assembly further includes: a second bearing, the first bearing and the second bearing are respectively arranged at both ends of the hollow tube, the support member is arranged between the first bearing and the second bearing, and one end of the rotating shaft is inserted into and passes through the second bearing, the support member and the first bearing in sequence; and / or, A second elastic member is compressed and arranged between the support member and the second bearing, one end of the second elastic member is connected to the first supporting end of the support member, and the other end of the second elastic member is connected to the second inner ring and the second outer ring of the second bearing; or, A second elastic member is compressed and arranged between the second bearing and the motor housing of the motor assembly, one end of the second elastic member is connected to the motor housing, and the other end of the second elastic member abuts against the second bearing; and / or, The thickness of the first supporting end of the supporting member gradually decreases along the direction from the second supporting end to the first supporting end; and / or, The support member is interference fit with the hollow tube.

4. The fan assembly according to claim 3, wherein: The end of the assembly seat connected to the PCB circuit board is provided with a plurality of connecting stop edges, adjacent connecting stop edges among the plurality of connecting stop edges have stop edge gaps, the PCB circuit board cover is arranged on the plurality of connecting stop edges, and the PCB circuit board and the stop edge gaps enclose to form the second air outlet; and / or, The tooth marks of the guide serrations are in the same inclination direction as the tooth marks of the trailing edge serrations; or, The tooth marks of the guide serrations are inclined in opposite directions to the tooth marks of the trailing edge serrations; and / or, The first supporting end of the supporting member abuts against the second inner ring or the second outer ring of the second bearing, and the second supporting end of the supporting member is connected to the first elastic member; and / or, The support member is provided with a first deformation notch at the second support end; and / or, The support member is provided with a second deformation notch at the second support end; and / or, The outer surface of the support member is raised to form ridges.

5. The fan assembly according to claim 4, wherein: The tooth marks of the guide serrations are inclined toward the fan housing, and the tooth marks of the trailing edge serrations are inclined toward the fan housing; or, The tooth marks of the guide serrations are inclined toward the fan housing, and the tooth marks of the trailing edge serrations are inclined toward the assembly seat; or, The tooth marks of the guide serrations are inclined toward the assembly seat, and the tooth marks of the trailing edge serrations are inclined toward the fan housing; and / or, The first deformation notch and the second deformation notch are arranged opposite to each other; and / or, The protrusion height of the ridge gradually decreases from the second support end to the first support end; and / or, One end of the ridge facing the first supporting end smoothly transitions to the surface of the supporting member.

6. The fan assembly according to claim 3, wherein: The tooth marks of the guide serrations and the tooth marks of the trailing edge serrations correspond to each other; or, The tooth marks of the guide saw teeth and the tooth marks of the trailing edge saw teeth are staggered and matched with each other.

7. The fan assembly according to claim 1, wherein: One end of the motor assembly is inserted into the assembly seat and connected to the assembly seat, and the other end of the motor assembly is inserted into the fan blade and connected to the fan blade.

8. The fan assembly according to claim 7, wherein: A connecting shaft and a plurality of reinforcing ribs are provided in the fan blades, the plurality of reinforcing ribs are arranged around the connecting shaft, the motor assembly abuts against the connecting shaft and / or the plurality of reinforcing ribs to reduce the rotational torque of the fan blades; and / or, The motor assembly is a three-phase motor; and / or, The motor assembly is powered by a battery.

9. The fan assembly according to claim 8, wherein: The length of the motor assembly inserted into the assembly seat is greater than the length of the motor assembly inserted into the fan blade; and / or, The outer diameter of the assembly seat is the same as the maximum outer diameter of the hub of the fan blade; and / or, The rated operating voltage of the motor assembly is 6-8.4V or 9-12.6V; and / or, The rated operating current of the motor assembly is 0.1-2.9A or 0.08-2.7A; and / or, The rated power of the motor assembly is 0.6-25W or 0.7-33W; and / or, The rotation speed of the motor assembly is 14,000-48,000 rpm.

10. A blowing device, characterized in that: The blowing device is assembled with the fan assembly according to any one of claims 1 to 9.

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