Axial flow fan and blowing device

Abstract

The utility model provides an axial flow fan and a blowing device.The axial flow fan comprises a fan body and a damping support arranged on the fan body, the damping support is made of an elastic material and arranged on the periphery of the fan body in a sleeving mode, the inner surface of the side, close to the fan body, of the damping support is provided with a protruding structure, and the protruding structure makes contact with the fan body; the fan main body only makes contact with the protruding structures with the small area, vibration energy can be concentrated on the contact portions, deformation of the protruding structures is increased during vibration, and therefore the vibration energy can be absorbed more effectively, the speed and strength of vibration transmitted to other parts are reduced, and the service life of the fan main body is prolonged. The noise generated by the fan main body is reduced by reducing the vibration of the fan main body, so that the noise of the axial flow fan is reduced, and the use experience of the product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of a fan, in particular to an axial flow fan and a blowing device. BACKGROUND

[0002] At present, various portable temperature adjusting devices appear on the market, such as neck hanging fans, etc. The portable temperature adjusting device is small and portable, and has high temperature adjusting efficiency. It brings convenience to users in home, office, driving and outdoor scenes, and can also adjust the temperature for users and free the hands of users, which is deeply loved by users. The portable temperature adjusting device is usually provided with a centrifugal fan, and the wind blown by the centrifugal fan is used to cool the user. However, when the user has a large cooling demand, the centrifugal fan cannot meet the user's large wind volume cooling demand. However, if the centrifugal fan is replaced by an axial flow fan with faster wind speed and larger wind volume, due to the large vibration frequency of the high-speed rotation of the axial flow fan, a large noise is usually generated, which interferes with the user and affects the user's work, study, rest and other daily life, causing annoyance and bad product experience to the user.

[0003] Therefore, it is necessary to improve the existing axial flow fan to solve the above problems. SUMMARY

[0004] Therefore, the present application provides an axial flow fan and a blowing device which can effectively solve the above problems.

[0005] The present application provides an axial flow fan, which comprises a fan main body and a damping support provided on the fan main body, wherein the fan main body comprises a motor, a fan wheel, a fan cover and a circuit board; the damping support is made of elastic material, the damping support is sleeved on the outer periphery of the fan main body, and the inner surface of the side of the damping support close to the fan main body is provided with a protruding structure, and the protruding structure is in contact with the fan main body to reduce the noise generated by the fan main body.

[0006] In an embodiment, the protruding structure comprises a point-shaped protrusion and / or a line-shaped protrusion; the line-shaped protrusion extends in a screw thread shape along the length direction of the damping support.

[0007] In an embodiment, the protruding structure divides the spacing space between the damping support and the fan main body into a wind cavity, and the two ends of the wind cavity are respectively communicated with the outside.

[0008] In an embodiment, the outer surface of the side of the damping support away from the fan main body is provided with a fixing structure, and the fixing structure protrudes from the outer surface of the damping support.

[0009] In an embodiment, the fixing structure is an arc-shaped protrusion, and the arc-shaped protrusion surrounds the damping support.

[0010] In an embodiment, a plurality of the arc-shaped protrusions are arranged along the length direction of the shock-absorbing support.

[0011] In an embodiment, a sound insulation member is further included, which is sleeved on the outer periphery of the shock-absorbing support.

[0012] In an embodiment, the length of the sound insulation member in the axial direction is greater than the length of the wind cover in the axial direction.

[0013] In an embodiment, the fan wheel is drivenly connected to one end of the motor, the wind cover is arranged outside the fan wheel and the corresponding part of the motor, one end of the wind cover close to the fan wheel forms a first air inlet, the other end forms a first air outlet in communication with the first air inlet, the shock-absorbing support is sleeved on the outer periphery of the wind cover, and the circuit board is arranged at the end of the motor away from the first air inlet.

[0014] The application further provides a hair dryer, which comprises a housing and an axial flow fan as described above arranged in the housing.

[0015] In summary, the application provides an axial flow fan and a hair dryer. The axial flow fan comprises a fan body and a shock-absorbing support arranged on the fan body. The shock-absorbing support is made of elastic material and is sleeved on the outer periphery of the fan body. The inner surface of the shock-absorbing support close to the fan body is provided with a protrusion structure. The protrusion structure is in contact with the fan body, so as to reduce the direct contact area between the fan body and the shock-absorbing support. The fan body is only in contact with the protrusion structure with a small area. When the fan body vibrates, the deformation of the protrusion structure increases, so that the vibration energy is concentrated on these contact positions. When the fan body vibrates, the deformation of the protrusion structure increases, so that the vibration energy is concentrated on these contact positions. Thus, the vibration energy can be more effectively absorbed, and the speed and intensity of the vibration transmitted to other components are reduced. In this way, the noise generated by the fan body is reduced by reducing the vibration of the fan body, so as to reduce the noise of the axial flow fan and improve the user experience of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a perspective view of a hair dryer according to the application.

[0017] Figure 2 FIG. 2 is a preliminary exploded view of the hair dryer according to the application. Figure 1

[0018] Figure 3 FIG. 3 is a further exploded view of the hair dryer according to the application. Figure 2

[0019] Figure 4 FIG. 4 is a perspective view of the axial flow fan according to the application at an angle. Figure 1

[0020] Figure 5 FIG. 5 is a sectional view of the axial flow fan according to the application.​​​Figure 1 Axial flow fan in FIG. 1 in perspective view from another angle.

[0021] Figure 6 FIG. 1 is a perspective view of an axial flow fan according to an embodiment of the present application. Figure 4 Side sectional view of the axial flow fan in FIG. 1.

[0022] Figure 7 FIG. 2 is an exploded view of the axial flow fan in FIG. 1 from one angle. Figure 4

[0023] Figure 8 FIG. 2 is an exploded view of the axial flow fan in FIG. 1 from another angle. Figure 4

[0024] Figure 9 FIG. 3 is a perspective view of a shock-absorbing support according to an embodiment of the present application. Figure 4

[0025] Figure 10 Side sectional view of the shock-absorbing support in FIG. 3. Figure 9

[0026] Figure 11 FIG. 4 is a perspective view of a shock-absorbing support according to another embodiment of the present application.

[0027] Figure 12 Figure 11 Side sectional view of the shock-absorbing support in FIG. 4.

[0028] Figure 13 FIG. 5 is a perspective view of a shock-absorbing support according to yet another embodiment of the present application.

[0029] Figure 14 Figure 13 Side sectional view of the shock-absorbing support in FIG. 5. DETAILED DESCRIPTION

[0030] Before the embodiments are described in detail, it should be understood that the application is not limited to the detailed construction or arrangement of elements described hereinbelow or illustrated in the drawings. The application can be implemented in other ways. Also, it should be understood that the language used herein is merely used as a description and should not be construed as limiting. As used herein, "include," "comprise," "have," and the like are intended to mean including but not limited to, and are intended to be synonymous with "including," "comprising," "containing," and the like. In particular, when describing "one" of an element, the application does not limit the number of the element to one, but can include a plurality of the element.

[0031] Reference will now be made to Figures 1 to 3 ​​​​​​As shown, this application provides a blower device 10, which is, for example, a neck fan that can be worn around the neck to cool down the body. The blower device 10 includes a housing 12 and an axial flow fan 14 disposed within the housing 12. The housing 12 has a second air outlet 16 corresponding to the axial flow fan 14, and the air generated by the axial flow fan 14 is blown out from the second air outlet 16. The axial flow fan 14 includes a fan body 18 and a vibration damping bracket 20 disposed on the fan body 18. The vibration damping bracket 20 is made of elastic material and is sleeved on the outer periphery of the fan body 18. The inner surface of the vibration damping bracket 20 near the fan body 18 has a protruding structure that contacts the fan body 18, thereby reducing the direct contact area between the fan body 18 and the vibration damping bracket 20. The fan body 18 only contacts the small protruding structure, so the vibration energy is concentrated at these contact points. During vibration, the deformation of the protruding structure increases, which can more effectively absorb the vibration energy and slow down the speed and intensity of vibration transmitted to other components. This reduces the noise generated by the fan body 18 by reducing the vibration of the fan body 18, thereby reducing the noise of the axial flow fan 14 and the air blowing device 10 configured with the axial flow fan 14 and improving the user experience of the air blowing device 10. In other embodiments, the axial flow fan 14 can also be applied to other devices, and the air blowing device 10 can also be other devices that use the axial flow fan 14 for blowing.

[0032] Specifically, the outer shell 12 is curved into an arc shape to form a wearing cavity 22, allowing the blower 10 to be worn around the neck of the user. The outer shell 12 includes a rotating connector 24 and shell portions 26 connected to opposite ends of the rotating connector 24. The two shell portions 26 can rotate relative to each other via the rotating connector 24 to adjust the size of the wearing cavity 22, adapting to users with different neck sizes and facilitating the user's opening of the outer shell 12 for wearing. Each of the two shell portions 26 is equipped with an axial flow fan 14, for example, located at the end of the shell portion 26 away from the rotating connector 24. Batteries 28 are also installed in each of the two shell portions 26, and a circuit module 30 is installed in one of the shell portions 26. The two axial flow fans 14 and the two batteries 28 are electrically connected to the circuit module 30. It should be noted that the structure and internal component arrangement of the two shell portions 26 are basically the same; the following detailed description uses only one shell portion 26 as an example.

[0033] Optionally, the shell 26 includes a first shell 26a and a second shell 26b connected to each other. The first shell 26a is located on the side closer to the wearing cavity 22, and the second shell 26b is located on the side away from the wearing cavity 22. The first shell 26a and the second shell 26b can be detachably fixed, for example by means of a snap fastener, so as to facilitate disassembly and maintenance.

[0034] Furthermore, the shell 26 is provided with an air guide 32 and a mounting position 34. The axial flow fan 14 is installed in the mounting position 34 to realize the installation and fixation of the axial flow fan 14. For example, the shell 26 is provided with a mounting bracket 36 at one end away from the rotating connector 24. The mounting position 34 is a groove structure provided in the mounting bracket 36. A part of the mounting bracket 36 is provided on the inner side wall of the first shell 26a and another part is provided on the inner side wall of the second shell 26b. When installed, the two are joined together to form the groove structure mounting position 34. A second air outlet 16 is provided on one side wall of the shell portion 26 in the width direction, and a second air inlet 40 is provided on the end wall of the shell portion 26 away from the rotating connector 24. The air guide 32 is located between the mounting position 34 and the second air outlet 16 and forms an air guide channel 42. The air guide channel 42 connects the second air outlet 16 and the first air outlet 44 of the axial flow fan 14. For example, the inlet of the air guide channel 42 corresponds to the first air outlet 44, and the outlet of the air guide channel 42 corresponds to the second air outlet 16. The air guide 32 includes a base plate and multiple side plates disposed on the base plate. The multiple side plates are spaced apart, thereby forming an air guide channel 42 between the multiple side plates. The base plate is fixed on the first shell 26a, and the ends of the side plates abut against the inner side wall of the second shell 26b.

[0035] Preferably, within one of the housing portions 26, the circuit module 30, battery 28, air guide 32, and axial flow fan 14 are arranged sequentially along the length of the housing portion 26. The circuit module 30 is located at the end closer to the rotating connector 24, and the axial flow fan 14 is located at the end away from the rotating connector 24. The battery 28 and air guide 32 are arranged alternately in the width direction of the housing portion 26. Within the other housing portion 26, the arrangement of the battery 28, air guide 32, and axial flow fan 14 is similar to that in one of the housing portions 26, and will not be described again here.

[0036] Preferably, the air guide 32 is made of sound-absorbing material. Therefore, the noise generated by the air generated by the axial flow fan 14 when it passes through the air guide 32 can be absorbed by the air guide 32, thereby achieving a noise reduction effect.

[0037] In the illustrated embodiment, as Figures 4 to 8 As shown, the axial flow fan 14 is cylindrical in shape, and the vibration damping bracket 20 is annular and made of elastic material, such as silicone or rubber. This allows the vibration damping bracket 20 to absorb some energy and buffer vibrations through deformation, thereby achieving vibration reduction and noise reduction. The vibration damping bracket 20 is fitted around the outer periphery of the fan body 18. On the one hand, it prevents the fan body 18 from directly contacting the mounting bracket 36, and the elasticity of the vibration damping bracket 20 absorbs some vibration energy, thus achieving vibration reduction and noise reduction. On the other hand, the vibration damping bracket 20 also provides a certain degree of sound insulation, thereby reducing noise.

[0038] In this embodiment, the fan body 18 includes a motor 46, a fan wheel 48, and a fan shroud 50. The fan wheel 48 is driven to one end of the motor 46, allowing the motor 46 to drive the fan wheel 48 to rotate. The fan shroud 50 covers the fan wheel 48 and the corresponding portion of the motor 46; that is, part of the motor 46 is located inside the fan shroud 50, and another part is located outside the fan shroud 50. The fan shroud 50 and the portion of the motor 46 located inside the fan shroud 50 are connected by multiple connecting ribs 52. The multiple connecting ribs 52 are evenly spaced along the circumference of the motor 46 or the fan shroud 50, with one end of the connecting rib 52 connected to the inner surface of the fan shroud 50 and the other end connected to the outer surface of the motor 46. The fan wheel 48 is located at one end inside the fan cover 50, and the fan cover 50 forms a first air inlet 54 at the end corresponding to the fan wheel 48. The connecting rib 52 extends along the length of the fan cover 50 or the motor 46, and the connecting rib 52 extends to the end of the fan cover 50 away from the first air inlet 54. Multiple connecting ribs 52 divide the end of the fan cover 50 away from the fan wheel 48 to form a first air outlet 44 that communicates with the first air inlet 54.

[0039] The vibration damping bracket 20 is fitted around the outer periphery of the fan shroud 50. Both the radial and inner surfaces of the vibration damping bracket 20 are made of elastic materials such as silicone. The silicone material on the inner surface of the vibration damping bracket 20 is designed in the shape of dots and lines to improve its elasticity. This allows the elasticity of the silicone to reduce vibration when the motor 46 undergoes axial movement. Specifically, a fixing structure is provided on the outer surface of the vibration damping bracket 20 away from the fan body 18. The fixing structure is made of elastic materials such as silicone and protrudes from the outer surface of the vibration damping bracket 20, increasing its installation stability. For example, the fixing structure can fix the vibration damping bracket 20 to the inner wall of the outer casing 12. Preferably, the fixing structure includes an arc-shaped protrusion 56, which surrounds the vibration damping bracket 20 and extends circumferentially. For example, the arc-shaped protrusion 56 forms a closed-loop structure. The design of the arc-shaped protrusion 56 reduces the contact between the vibration damping bracket 20 and the outside environment, thereby reducing vibration transmission. Furthermore, the fixing structure reduces the contact area between the fan body 18 and external components, reducing vibration and improving noise reduction. Multiple arc-shaped protrusions 56 can be provided, and these protrusions 56 are spaced apart along the length of the shock absorber bracket 20. For example, two arc-shaped protrusions 56 can be provided, with each protrusion 56 positioned at one end of the length of the shock absorber bracket 20, thereby increasing the installation stability of the shock absorber bracket 20. By providing arc-shaped protrusions 56, the contact area with the outer casing 12 can be further reduced, thereby reducing the transmission of vibrations.

[0040] Furthermore, such as Figures 9 to 14As shown, the raised structure on the inner surface of the damping bracket 20 near the fan body 18 is made of elastic material such as silicone. The raised structure contacts the fan body 18 and can include dot-shaped protrusions 58 and / or line-shaped protrusions 60. By designing the silicone material on the inner surface of the damping bracket 20 into dot and line-shaped damping structures, the elasticity of the silicone is improved, and the direct contact area between the fan body 18 and the damping bracket 20 is reduced. Since the fan body 18 and the damping bracket 20 only contact in a few places (raised structures), the vibration energy is concentrated at these contact points. The deformation of the elastic material at these points increases, allowing the elastic material to absorb the vibration energy more effectively, slowing down the speed and intensity of vibration transmission to other components or the casing 12, thereby reducing noise. Multiple dot-shaped protrusions 58 can be provided, and these protrusions 58 are arranged in an array structure along the length and circumferential directions of the damping bracket 20, such as in multiple rows and columns. Figure 11 and Figure 12 As shown. The linear protrusion 60 extends in a spiral shape along the length of the shock absorber bracket 20, as... Figure 13 and Figure 14 As shown; or, multiple linear protrusions 60 can be provided, each linear protrusion 60 being an arc shape extending along the length direction of the shock absorber bracket 20, that is, the linear protrusion 60 is curved into an arc shape, and multiple linear protrusions 60 are evenly spaced along the circumference of the shock absorber bracket 20, such as... Figure 9 and Figure 10 As shown. It should be understood that in other embodiments, the protrusion structure may also be designed in other shapes and structures, and this application is not limited thereto.

[0041] In the illustrated embodiment, a protruding structure is provided on the inner surface of the shock absorber bracket 20, creating a gap between the inner surface of the shock absorber bracket 20 and the outer wall of the fan body 18. The protruding structure divides the gap between the shock absorber bracket 20 and the fan body 18 to form an air cavity 62. The shape of the air cavity 62 can be determined by the protruding structure. For example, when the protruding structure is threaded, the air cavity 62 corresponds to a spiral structure. The two ends of the air cavity 62 in the axial direction of the shock absorber bracket 20 are respectively connected to the outside, and one end of the air cavity 62 corresponds to the first air inlet 54. When the axial flow fan 14 is running, part of the outside air is drawn into the first air inlet 54, and the other part of the air is guided into the air cavity 62. The design of the air cavity 62 allows airflow through the axial flow fan 14 during operation, achieving heat dissipation for the outer surface of the fan body 18. Furthermore, the air layer within the air cavity 62 absorbs and disperses sound waves. The airflow causes the sound waves to oscillate along their propagation path, preventing them from traveling in a straight line. As the sound waves pass through the air cavity 62, they are dispersed by airflow from different directions, thus reducing noise intensity. The airflow within the air cavity 62 acts as a buffer and reduces frequency; moreover, gases absorb high-frequency noise more readily than solid materials. In addition, the spiral-designed protruding structure makes the air cavity 62 spiral-shaped as well. The damping structure is spirally arranged along the airflow path, ensuring even distribution of airflow across different areas of the air cavity 62. This prevents air from concentrating in one direction or area, and the uniform airflow effectively reduces additional noise caused by uneven pressure.

[0042] To further reduce noise, in the illustrated embodiment, the axial flow fan 14 also includes a sound insulation component 64. The sound insulation component 64 is fitted around the outer periphery of the vibration damping bracket 20, meaning the vibration damping bracket 20 is installed inside the sound insulation component 64. The sound insulation component 64 can be made of materials such as sound-absorbing cotton, thereby reducing noise by blocking sound transmission. Preferably, the first air inlet 54 and the first air outlet 44 are located inside the sound insulation component 64. For example, the axial length of the sound insulation component 64 is greater than the axial length of the vibration damping bracket 20, and the axial length of the sound insulation component 64 is greater than the axial length of the fan shroud 50. Furthermore, both ends of the sound insulation component 64 extend beyond the ends of the vibration damping bracket 20, ensuring that the first air inlet 54 and the first air outlet 44 of the axial flow fan 14 are inside the sound insulation component 64, thus achieving noise reduction. In addition, the sound insulation component 64 has high elasticity, further reducing vibration in the fan body 18, achieving dual vibration reduction. In this embodiment, the first air inlet 54 of the axial flow fan 14 faces the second air inlet 40 and corresponds to the position of the second air inlet 40. External air can enter the axial flow fan 14 through the second air inlet 40 and the first air inlet 54, and the first air outlet 44 faces the air guide 32.

[0043] In the illustrated embodiment, the fan body 18 includes a circuit board 66. One end of the motor 46 is located inside the fan cover 50, and the other end protrudes outside the sound insulation member 64. The circuit board 66 is located at the end of the motor 46 away from the fan wheel 48 and corresponds to the first air outlet 44. When the axial flow fan 14 is working, the air blown out of the first air outlet 44 can dissipate heat from the circuit board 66, and then blown out from the second air outlet 16 through the air guide channel 42.

[0044] In summary, this application provides an axial flow fan and a blowing device. The axial flow fan includes a fan body and a vibration damping bracket disposed on the fan body. The vibration damping bracket is made of elastic material and is sleeved on the outer periphery of the fan body. The inner surface of the vibration damping bracket near the fan body has a protruding structure. The protruding structure contacts the fan body to reduce the direct contact area between the fan body and the vibration damping bracket. The fan body only contacts the small protruding structure, so the vibration energy is concentrated at these contact points. During vibration, the deformation of the protruding structure increases, thereby more effectively absorbing this vibration energy and slowing down the speed and intensity of vibration transmitted to other components. This reduces the noise generated by the fan body by reducing the vibration of the fan body, thereby reducing the noise of the axial flow fan and improving the user experience of the product.

[0045] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of this application is determined by the appended claims, and not by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of those claims.

Claims

1. An axial flow fan, characterized in that, The device includes a fan body and a shock-absorbing bracket disposed on the fan body. The fan body includes a motor, a fan wheel, a fan cover, and a circuit board. The shock-absorbing bracket is made of elastic material and is sleeved on the outer periphery of the fan body. The inner surface of the shock-absorbing bracket near the fan body has a protruding structure that contacts the fan body to reduce the noise generated by the fan body.

2. The axial flow fan as described in claim 1, characterized in that, The protrusion structure includes dot-shaped protrusions and / or linear protrusions; the linear protrusions extend in a spiral shape along the length direction of the shock-absorbing bracket.

3. The axial flow fan as described in claim 2, characterized in that, The protruding structure divides the space between the shock-absorbing bracket and the fan body to form a wind cavity, and the two ends of the wind cavity are respectively connected to the outside.

4. The axial flow fan as described in claim 1, characterized in that, The outer surface of the shock-absorbing bracket away from the main body of the wind turbine is provided with a fixing structure, which protrudes from the outer surface of the shock-absorbing bracket.

5. The axial flow fan as described in claim 4, characterized in that, The fixing structure is an arc-shaped protrusion, and the arc-shaped protrusion surrounds the shock-absorbing bracket.

6. The axial flow fan as described in claim 5, characterized in that, Multiple arc-shaped protrusions are provided, and the multiple arc-shaped protrusions are spaced apart along the length direction of the shock-absorbing bracket.

7. The axial flow fan as described in claim 1, characterized in that, It also includes a sound insulation component, which is fitted around the outer periphery of the shock-absorbing bracket.

8. The axial flow fan as described in claim 7, characterized in that, The axial length of the sound insulation component is greater than the axial length of the wind shield.

9. The axial flow fan as described in any one of claims 1-8, characterized in that, The fan wheel is driven and connected to one end of the motor. The fan cover is installed on the fan wheel and the corresponding part of the motor. The end of the fan cover near the fan wheel forms a first air inlet, and the other end forms a first air outlet communicating with the first air inlet. The shock-absorbing bracket is sleeved on the outer periphery of the fan cover, and the circuit board is located at the end of the motor away from the first air inlet.

10. A blower device, characterized in that, It includes a housing and an axial flow fan as described in any one of claims 1-9 disposed within the housing.

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