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; one end of the motor assembly is inserted into the assembling base, an air inlet gap is formed between the fan blades and the assembling base, a first assembling gap is formed between the motor assembly and the assembling base, and a first air outlet hole is formed in the assembling base; the air inlet gap, the first assembling gap and the first air outlet hole form a first heat dissipation channel. When the motor assembly works, airflow flows along with a first heat dissipation channel formed by the air inlet gap, the first assembly gap and the first air outlet hole, heat generated by the motor assembly during working can be taken away, the motor assembly is cooled, and the air cooling effect is achieved.

Description

Technical Field

[0001] This 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 essential items for people to eliminate the heat. Along with people's demand for convenient use, fans that are more lightweight and portable are increasingly favored by people.

[0003] In the prior art, a fan motor and a fan blade are provided inside the fan. Among them, the fan motor is fixed inside the fan housing, and the fan motor is connected to the fan blade through a rotating shaft. In order to increase the air outlet efficiency and air volume of the fan, the method of increasing the rotation speed of the fan motor is usually adopted.

[0004] The inventor of the present invention found in the research that: when the fan motor rotates at a high speed, the fan motor generates a large amount 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 working stability of the fan motor, and even seriously causing damage or fire to the fan motor. Summary of the Utility Model

[0005] The purpose of this application is to provide a fan assembly and a blowing device that can effectively cool the fan motor in time.

[0006] An embodiment of this application provides a fan assembly, including:

[0007] A fan housing;

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

[0009] A motor assembly, the motor assembly is assembled inside the fan housing;

[0010] A fan blade, the fan blade is connected to the motor assembly;

[0011] One end of the motor assembly is inserted into the assembly seat, there is an air inlet gap between the fan blade and the assembly seat, there is a first assembly gap between the motor assembly and the assembly seat, and a first air outlet hole is formed on the assembly seat. The air inlet gap, the first assembly gap, and the first air outlet hole form a first heat dissipation path.

[0012] Optionally, the assembly seat includes: a connecting cylinder, the connecting cylinder is connected to the fan housing through the plurality of static blades, one end of the motor assembly is inserted into the connecting cylinder, and there is a first assembly gap between the connecting cylinder and the motor assembly; and / or,

[0013] The outer diameter of the mounting seat is the same as the maximum outer diameter of the hub of the fan blade; and / or,

[0014] The motor assembly is a three-phase motor; and / or,

[0015] The motor assembly is powered by a battery.

[0016] Optionally, the mounting seat further includes: a connecting ring and a hollow tube. The connecting ring is disposed within the connecting cylinder. The hollow tube is connected to the connecting ring, and the motor assembly is connected to the hollow tube; and / or,

[0017] The rated operating voltage of the motor assembly is 6 - 8.4V or 9 - 12.6V; and / or,

[0018] The rated operating current of the motor assembly is 0.1 - 2.9A or 0.08 - 2.7A; and / or,

[0019] The rated power of the motor assembly is 0.6 - 25W or 0.7 - 33W; and / or,

[0020] The rotational speed of the motor assembly is 14000 - 48000 revolutions per minute.

[0021] Optionally, the motor assembly includes: a motor stator and a motor rotor. The motor stator is connected to the mounting seat. The motor rotor is sleeved on the motor stator. One end of the motor rotor is inserted into the mounting seat, and there is a first assembly gap between the motor rotor and the mounting seat.

[0022] Optionally, an air inlet opening is formed on the motor rotor. There is a coil gap between the motor stators. The air inlet opening, the coil gap, and the first air outlet hole form a second heat dissipation path; and / or,

[0023] An air inlet opening is formed on the motor rotor. There is a coupling gap between the motor stator and the motor rotor. The air inlet opening, the coupling gap, and the first air outlet hole form a third heat dissipation path.

[0024] Optionally, the motor rotor includes: 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. There is a first assembly gap between the motor housing and the mounting seat. One end of the motor housing is inserted into the mounting seat, and the air inlet opening is formed at one end of the motor housing facing the fan blade.

[0025] Optionally, the motor assembly also includes: a rotating shaft, one end of the rotating shaft is connected to the assembly seat, the other end of the rotating shaft is connected to the fan blade, the motor rotor is connected to the rotating shaft, one end of the motor rotor facing the fan blade is inserted into the fan blade, and a second assembly gap is provided between the fan blade and the motor rotor, and the second assembly gap, the air inlet opening, the coil gap and the first air outlet constitute a second heat dissipation path.

[0026] Optionally, the fan assembly further includes: a PCB circuit board, the PCB circuit board is connected to one end of the assembly seat facing away from the fan blades, a second air outlet is provided on the PCB circuit board and / or the assembly seat, and the first air outlet is connected to the second air outlet.

[0027] Optionally, a plurality of connecting baffles are provided at one end of the assembly seat connected to the PCB circuit board, and adjacent connecting baffles among the plurality of connecting baffles have baffle gaps, the PCB circuit board cover is arranged on the plurality of connecting baffles, and the PCB circuit board and the baffle gaps enclose to form the second air outlet.

[0028] 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 assembly as described above.

[0029] 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 further promotes the airflow in the fan housing to move in a directional manner. The airflow belongs to a fluid, and the unique flow characteristics of the fluid can cause the airflow to flow to any airflow channel connected to the external environment. There is an air inlet gap between the fan blades and the assembly seat, and there is a first assembly gap between the motor assembly and the assembly seat, and a first air outlet is provided on the assembly seat. The air inlet gap, the first assembly gap and the first air outlet form a complete airflow channel leading to the external environment. The airflow flows along the first heat dissipation path formed by the air inlet gap, the first assembly gap and the first air outlet, which will take away the heat generated by the operation of the motor assembly, cool down the motor assembly, and play a role of air cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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:

[0031] Figure 1 This is a schematic diagram of the overall structure of a fan assembly according to a specific embodiment of the present application;

[0032] Figure 2 A cross-sectional schematic diagram of a fan assembly according to a specific embodiment of the present application;

[0033] Figure 3Schematic diagram of the structure of the fan housing according to a specific embodiment of the present application;

[0034] Figure 4 Exploded schematic diagram of the fan assembly according to a specific embodiment of the present application;

[0035] Figure 5 Schematic diagram of the air flow path of the first heat dissipation path according to a specific embodiment of the present application;

[0036] Figure 6 Schematic diagram of the air flow path of the second heat dissipation path according to a specific embodiment of the present application;

[0037] Figure 7 Schematic diagram of the cross-section and gap indication of the fan assembly according to a specific embodiment of the present application;

[0038] Figure 8 Schematic diagram of the structure of the motor housing according to a specific embodiment of the present application;

[0039] Figure 9 Schematic diagram of the coil structure and gap indication according to a specific embodiment of the present application.

[0040] Description of the drawings: 1. Fan housing; 11. Static blades; 2. Assembly seat; 21. Connecting cylinder; 22. Connecting ring; 23. Hollow tube; 24. First air outlet hole; 3. Motor assembly; 31. Motor rotor; 311. Motor housing; 312. Magnetic ring; 313. Rotating shaft; 314. Air inlet opening; 32. Motor stator; 321. Coil; 33. First bearing; 34. Second bearing; 4. Fan blade; 41. Hub; 5. PCB circuit board; 51. Second air outlet hole. Detailed description of the specific embodiment

[0041] For the convenience of understanding the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in this specification in the description of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0043] Embodiment 1

[0044] Please refer to Figure 1 、 Figure 2 and Figure 5 , Figure 1 which is a schematic diagram of the overall structure of the fan assembly of this embodiment; Figure 2 which is a sectional view of the fan assembly of this embodiment; Figure 5 which is a schematic diagram of the air flow path of the first heat dissipation path of this embodiment.

[0045] As Figure 1 、 Figure 2 and Figure 5 shown, a fan assembly includes: a fan housing 1, a mounting seat 2, a motor assembly 3, and a fan blade 4. The mounting seat 2 is disposed inside the fan housing 1, and the mounting seat 2 is connected to the fan housing 1 through a plurality of static blades 11; the motor assembly 3 is assembled inside the fan housing 1; the fan blade 4 is connected to the motor assembly 3; one end of the motor assembly 3 is inserted into the mounting seat 2, there is an air inlet gap H1 between the fan blade 4 and the mounting seat 2, there is a first assembly gap between the motor assembly 3 and the mounting seat 2, and a first air outlet hole 24 is formed on the mounting seat 2. The air inlet gap H1, the first assembly gap H2, and the first air outlet hole 24 form a first heat dissipation path.

[0046] In this embodiment, the fan housing 1 is configured as a cylinder, and a cylindrical air cavity is formed inside the cylinder. However, the shape of the fan housing 1 is not limited thereto. According to different specific application scenarios, in some embodiments, the shape of the fan housing 1 can be: triangular, quadrilateral, pentagonal, other polygons or other regular shapes, and the external shape structure of the fan housing 1 can be determined according to the needs of specific application scenarios, not limited to specific embodiments.

[0047] One end of the mounting seat 2 is disposed inside the fan housing 1, and the other end of the mounting seat 2 extends outside the fan housing 1. However, the positional relationship between the mounting seat 2 and the fan housing 1 is not limited thereto. According to different specific application scenarios, in some embodiments, the entire mounting seat 2 is disposed inside the fan housing 1. The positional relationship between the mounting seat 2 and the fan housing 1 can be determined according to the needs of specific application scenarios, not limited to specific embodiments.

[0048] In this embodiment, the number of the stationary blades 11 is: 7. However, the number of the stationary blades 11 is not limited thereto. According to different specific application scenarios, the number of the stationary blades 11 can be: 2, 3, 4, 5, 6, 8 or more. The number of the stationary blades 11 can be determined according to the needs of specific application scenarios, and is not limited to specific embodiments.

[0049] In this embodiment, the motor assembly 3 can be (but is not limited to): a single-phase motor, a two-phase motor or a three-phase motor.

[0050] In terms of the structure of the fan blade 4, the fan blade 4 can be (but is not limited to): an axial-flow fan or a mixed-flow fan. During specific application, the required fan blade 4 can be selected according to the needs of specific application scenarios, and is not limited herein.

[0051] Please refer to Figure 3 and Figure 7 , Figure 3 , which is a schematic structural diagram of the fan housing of this embodiment; Figure 7 , which is a schematic cross-sectional view and gap indication diagram of the fan assembly of this embodiment.

[0052] As Figure 3 and Figure 7 shown, in some embodiments, the first air outlet hole 24 has a multiplexing function. For example, the first air outlet hole 24 can be used as a wire routing hole for the motor assembly 3. According to different specific application scenarios, other functions of the first air outlet hole 24 are not listed one by one herein. However, it should be noted that: no matter what different uses the holes and slits opened on the mounting seat 2 have, as long as they have the function of facilitating air flow through ventilation, they belong to the first air outlet hole 24 referred to in this embodiment.

[0053] In some embodiments, there are two or more first air outlet holes 24.

[0054] In this embodiment, the width of the air inlet gap H1 is determined according to the end-to-end distance between the fan blade 4 and the mounting seat 2. In some embodiments, the air inlet gap H1 is a narrow slit with a relatively short distance. In other embodiments, the air inlet gap H1 is a wide slit with a relatively large distance.

[0055] In this embodiment, the first assembly gap H2 refers to: the distance gap between the inner surface of the mounting seat 2 and the outer surface of one end of the motor assembly 3 inserted into the mounting seat 2.

[0056] In some embodiments, the motor assembly 3 is a three-phase motor, and the three-phase motor has a higher rotational speed, which improves the air outlet rate and air volume of the fan assembly.

[0057] 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.

[0058] 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. Under the rated operating voltage range, the rated operating current corresponding to the motor assembly 3 is 0.1-2.9 A, the rated power corresponding to the motor assembly 3 is 0.6-25 W, and the speed of the motor assembly 3 is 14000-46000 rpm.

[0059] When the rated working voltage of the motor assembly 3 is 9-12.6V, the motor assembly 3 is powered by three batteries connected in series. Within the rated working voltage range, the corresponding rated working current of the motor assembly 3 is 0.08-2.7A, the corresponding rated power of the motor assembly 3 is 0.7-33W, and the rotation speed of the motor assembly 3 is 14000-48000 rpm.

[0060] 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 in 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.

[0061] In the above-mentioned embodiment, the fan blade 4 rotates under the drive of the motor assembly 3, and the fan blade 4 rotates and then promotes the airflow in the fan housing 1 to move in a directional manner. The airflow belongs to a fluid, and the unique flow characteristics of the fluid can make the airflow flow to any airflow channel connected to the external environment. There is an air inlet gap H1 between the fan blade 4 and the assembly seat 2, and there is a first assembly gap H2 between the motor assembly 3 and the assembly seat 2, and the assembly seat 2 is provided with a first air outlet 24. The air inlet gap H1, the first assembly gap H2 and the first air outlet 24 form a complete airflow channel leading to the external environment. When the motor assembly 3 is working, heat will be generated. If this heat is not dissipated in time, it will affect the normal operation of the motor assembly 3, and seriously cause the fan assembly to be damaged or burned. And the airflow flows along the first heat dissipation path composed of the air inlet gap H1, the first assembly gap H2 and the first air outlet 24, which will take away the heat generated by the work of the motor assembly 3, cool down the motor assembly 3, and play a role of air cooling.

[0062] See also Figure 4 , Figure 4 Schematic diagram of the exploded view of the fan assembly of this embodiment.

[0063] likeFigure 4 As shown, in some embodiments, the assembly seat 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 through a plurality of static blades 11. One end of the motor assembly 3 is inserted into the connecting cylinder 21, and there is a first assembly gap H2 between the connecting cylinder 21 and the motor assembly 3. The connecting ring 22 is arranged inside 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.

[0064] The connection method between the hollow tube 23 and the connecting ring 22 includes (but is not limited to): integral molding, plugging, clamping, interference fit, welding, screwing, adhesive connection, etc.

[0065] 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 first assembly gap H2 between the motor rotor 31 and the assembly seat 2.

[0066] Among them, the motor stator 32 includes: an iron core and a plurality of coils 321 wound around the iron core. Since each coil 321 is independently wound on the iron core, it is impossible to completely fill the gaps between the coils 321 and between the coils 321 and the iron core. Therefore, coil gaps will appear on the motor stator 32.

[0067] 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 a first bearing 33 and a 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 is magnetically coupled to the motor stator 32, and the motor housing 311 has an interference fit with the magnetic ring 312. One end of the motor housing 311 facing the fan blade 4 is connected to the rotating shaft 313 with an interference fit.

[0068] In some embodiments, there is a first assembly gap H2 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 provided at one end of the motor housing 311 facing the fan blade 4.

[0069] In some embodiments, the magnetic ring 312 is composed of a plurality of independent magnetic strips spaced apart. The plurality of magnetic strips are connected to the motor housing through connection methods such as adhesion, welding, and clamping.

[0070] Please refer to Figure 6 、 Figure 8 and Figure 9 ,Figure 6 This is a schematic diagram of the airflow path of the second heat dissipation path of this embodiment; Figure 8 Schematic diagram of the structure of the motor housing of this embodiment; Figure 9 Schematic diagram of the coil structure and gap indication of this embodiment.

[0071] like Figure 6 , Figure 8 and Figure 9 As shown, in some embodiments, an air inlet opening 314 is provided on the motor rotor 31, a coil gap H5 is provided between the motor stators 32, and the air inlet opening 314, the coil gap H5 and the first air outlet 24 form a second heat dissipation path.

[0072] The number of the air inlet openings 314 in this embodiment is 4. However, the number of the air inlet openings 314 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the air inlet openings 314 can be (not limited to): 1, 2, 3, 5 or more.

[0073] 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 through the second 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 motor assembly 3 during operation, cool down the motor assembly 3, and play a role in air cooling. Since the second 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 the heat taken away by the air cooling inside is more, and the heat dissipation effect is more obvious. The first heat dissipation path and the second heat dissipation path are respectively outside and inside the fan assembly, dissipating the heat of 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.

[0074] In some embodiments, there is also a coupling gap between the motor stator 32 and the magnetic ring 312. The air inlet opening 314, the coupling gap H3 and the first air outlet 24 form a third heat dissipation path for flow, which will also 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. The third heat dissipation path also flows out after passing through the inside of the motor assembly 3, and the air cooling takes away more heat from the inside, and the heat dissipation effect is more obvious. The first heat dissipation path, the second heat dissipation path and the third heat dissipation path are respectively outside and inside the fan assembly, and dissipate the heat of the motor assembly 3, further improving the effect of air cooling and heat dissipation, so that the motor assembly 3 can work in a stable and suitable temperature environment.

[0075] In some embodiments, when the magnetic ring 312 is composed of a plurality of independent magnetic strips, the magnetic ring 312 forms a separation gap. The separation gap spatially expands the coupling gap H3, making the coupling gap H3 larger, and making the contact area between the third heat dissipation path and the motor assembly 3 larger, and the heat dissipation effect is better.

[0076] In some embodiments, since the coil gap H5 and the coupling gap H3 are both disposed inside the motor assembly 3, the second heat dissipation pathway and the third heat dissipation pathway are interconnected, further improving the heat dissipation effect.

[0077] 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 second heat dissipation passage and the third heat dissipation passage to rotate. The airflow movement path in the second heat dissipation passage and the third heat dissipation passage is spiral. This movement mode makes the contact area between the airflow and the internal structure of the motor assembly 3 larger, and more heat is taken away, further improving the cooling effect.

[0078] In some embodiments, one end of the motor rotor 31 facing the fan blade 4 is inserted into the fan blade 4, and a second assembly gap H4 is provided between the fan blade 4 and the motor rotor 31. The second assembly gap H4, the air inlet opening 314, the coil gap H5 and the first air outlet 24 constitute a second heat dissipation path.

[0079] The end of the motor housing 311 facing the fan blade 4 is inserted into the fan blade 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 blade 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.

[0080] In some embodiments, the fan assembly also includes: a PCB circuit board 5, the PCB circuit board 5 is connected to the 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.

[0081] The PCB circuit board 5 is connected to the connecting tube 21 of the assembly seat 2. The connection between the PCB circuit board 5 and the connecting tube 21 is a screw connection. However, the connection between the PCB circuit board 5 and the connecting tube 21 is not limited thereto. According to different specific application scenarios, in some embodiments, the connection between the PCB circuit board 5 and the connecting tube 21 includes (but is not limited to): clamping, welding, riveting, adhesive fixation, etc. The connection between the PCB circuit board 5 and the connecting tube 21 can be determined according to the needs of the specific implementation method, and is not limited to the specific embodiment.

[0082] In some embodiments, when the size of the cross-section of the PCB board 5 is the same as, or larger than, that of the mounting seat 2, the PCB board 5 is placed on top of the mounting seat 2. To prevent the PCB board 5 from blocking the first heat dissipation path, the second heat dissipation path, and the third heat dissipation path, a second air outlet hole 51 is provided on the PCB board 5 and / or the mounting seat 2.

[0083] In some embodiments, the second air outlet hole 51 provided on the PCB board 5 has a multiplexing function. For example, the second air outlet hole 51 can serve as a wiring hole for the PCB board 5. Depending on the specific application scenario, other functions of the second air outlet hole 51 will not be listed one by one here. However, it should be noted that: No matter what different uses the holes and gaps provided on the PCB board 5 have, as long as they have the function of facilitating air flow for ventilation, they belong to the second air outlet hole 51 referred to in this embodiment.

[0084] In some embodiments, the second air outlet hole 51 is provided on the side wall of the connecting cylinder 21.

[0085] In some embodiments, the second air outlet hole 51 is provided on both the PCB board 5 and the mounting seat 2.

[0086] In some embodiments, when the size of the PCB board 5 is smaller than the cross-sectional size of the mounting seat 2, or when the PCB board 5 is mounted above the mounting seat 2, the second air outlet hole 51 is the gap between the PCB board 5 and the mounting seat 2.

[0087] When the PCB board 5 is in the working state, it will also generate heat. The accumulation of heat will also cause the working performance of the PCB board 5 to decline and even cause a fire. The PCB board 5 is connected to one end of the mounting seat 2 facing away from the fan blade 4, and the second air outlet hole 51 is provided on the PCB board 5 and / or the mounting seat 2. The first air outlet hole 24 and the second air outlet hole 51 are connected, and the air flow blown out from the first heat dissipation path, the second heat dissipation path, and the third heat dissipation path will flow out through the second air outlet hole 51. During this flow process, the air flow will carry away the heat generated by the PCB board 5, perform air cooling on the PCB board 5, ensure the stability of the working environment of the PCB board 5, and extend the service life of the PCB board 5.

[0088] In some embodiments, a plurality of connecting retaining edges are provided at one end of the mounting seat 2 connecting the PCB board 5. There is a retaining edge gap between adjacent connecting retaining edges among the plurality of connecting retaining edges. The PCB board 5 is placed on the plurality of connecting retaining edges, and the PCB board 5 and the retaining edge gap enclose to form the second air outlet hole 51.

[0089] The second air outlet 51 is formed by the PCB circuit board 5 and the gap between the baffles, and the airflow blown out from the first air outlet 24 first contacts the PCB circuit board 5, and then blows out from the second air outlet 51 along the PCB circuit board 5. In this process, the contact area and time between the airflow and the PCB circuit board 5 are increased, thereby improving the heat dissipation efficiency and making the cooling effect more significant.

[0090] In some embodiments, the outer diameter of the mounting seat 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 usually located at the end of the hub 41 close to the connecting tube 21. The outer diameter of the mounting seat 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 outlet efficiency of the fan assembly.

[0091] 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.

[0092] Example 2

[0093] A blowing device comprises the fan assembly in embodiment 1, wherein the fan assembly serves as a core module assembly for assembling the blowing device.

[0094] 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 assembly in Example 1 is assembled inside the shell of the above products.

[0095] The fan blades of the fan assembly of the blowing device in the present embodiment rotate under the drive of the motor assembly, and the rotation of the fan blades further promotes the airflow in the fan housing to move in a directional manner. The airflow belongs to a fluid, and the unique flow characteristics of the fluid can cause the airflow to flow to any airflow channel connected to the external environment. There is an air inlet gap between the fan blades and the assembly seat, and there is a first assembly gap between the motor assembly and the assembly seat, and a first air outlet is provided on the assembly seat. The air inlet gap, the first assembly gap and the first air outlet form a complete airflow channel leading to the external environment. The airflow flows along the first heat dissipation path formed by the air inlet gap, the first assembly gap and the first air outlet, which will take away the heat generated by the operation of the motor assembly, cool down the motor assembly, and play a role of air cooling.

[0096] It should be noted that the description and drawings of this application provide preferred embodiments of this application. However, this application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of this application. The purpose of providing these embodiments is to make the understanding of the disclosed content of this application more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, all of which are regarded as within the scope described in the specification of this utility model; further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of 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; A fan blade connected to the motor assembly; One end of the motor assembly is inserted into the assembly seat, an air inlet gap is provided between the fan blade and the assembly seat, a first assembly gap is provided between the motor assembly and the assembly seat, a first air outlet hole is provided on the assembly seat, and the air inlet gap, the first assembly gap and the first air outlet hole constitute a first heat dissipation passage.

2. The fan assembly according to claim 1, characterized in that: The assembly seat comprises: a connecting cylinder, the connecting cylinder is connected to the fan housing through the plurality of stationary blades, one end of the motor assembly is inserted into the connecting cylinder, and a first assembly gap is formed between the connecting cylinder and the motor assembly; and / or, The outer diameter of the mounting seat is the same as the maximum outer diameter of the hub of the fan blade; and / or, The motor assembly is a three-phase motor; and / or, The motor assembly is powered by a battery.

3. The fan assembly according to claim 2, characterized in that: The assembly seat further comprises: a connecting ring and a hollow tube, wherein the connecting ring is arranged in the connecting tube, the hollow tube is connected to the connecting ring, and the motor assembly is connected to the hollow tube; 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 14000-48000 rpm.

4. The fan assembly according to claim 1, characterized in that: The motor assembly comprises: a motor stator and a motor rotor, wherein 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, and a first assembly gap is provided between the motor rotor and the assembly seat.

5. The fan assembly according to claim 4, characterized in that: An air inlet opening is provided on the motor rotor, a coil gap is provided between the motor stators, and the air inlet opening, the coil gap and the first air outlet hole form a second heat dissipation passage; and / or, An air inlet opening is provided on the motor rotor, a coupling gap is provided between the motor stator and the motor rotor, and the air inlet opening, the coupling gap and the first air outlet hole form a third heat dissipation passage.

6. The fan assembly according to claim 5, characterized in that: The motor rotor comprises: a magnetic ring and a motor casing, wherein the magnetic ring is sleeved on the motor stator, and the motor casing is sleeved on the magnetic ring, a first assembly gap is provided between the motor casing and the assembly seat, one end of the motor casing is inserted into the assembly seat, and the air inlet opening is provided at one end of the motor casing facing the fan blades.

7. The fan assembly according to claim 5 or 6, characterized in that: The motor assembly also includes: a rotating shaft, one end of the rotating shaft is connected to the assembly seat, the other end of the rotating shaft is connected to the fan blade, the motor rotor is connected to the rotating shaft, one end of the motor rotor facing the fan blade is inserted into the fan blade, a second assembly gap is provided between the fan blade and the motor rotor, and the second assembly gap, the air inlet opening, the coil gap and the first air outlet constitute a second heat dissipation path.

8. The fan assembly according to any one of claims 1 to 6, characterized in that: The fan assembly also 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 provided on the PCB circuit board and / or the assembly seat, and the first air outlet is connected to the second air outlet.

9. The fan assembly according to claim 8, characterized in that: A plurality of connection baffles are provided at one end of the assembly seat connected to the PCB circuit board, and there are baffle gaps between adjacent connection baffles among the plurality of connection baffles. The PCB circuit board cover is arranged on the plurality of connection baffles, and the PCB circuit board and the baffle gaps enclose to form the second air outlet.

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

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