Air outlet component and portable fan

Abstract

The utility model provides an air outlet component which comprises a shell, the shell comprises a cavity, an air inlet and a first air outlet, the air inlet and the first air outlet communicate with the cavity, the cavity is provided with an air inlet cavity, a fixing cavity, an air duct and a containing cavity in the length direction, the air inlet communicates with the air inlet cavity, and the first air outlet communicates with the air duct; the braking assembly is contained in the fixing cavity and used for sucking air from the air inlet, and the air passes through the air inlet cavity, the braking assembly and the air duct and then is blown out from the first air outlet; the control assembly comprises a power supply part for supplying power to the brake assembly and a control part for controlling the brake assembly, the power supply part is contained in the containing cavity, and the control part is contained in the air inlet cavity; wherein the power supply part is electrically connected with the control part, the control part is electrically connected with the brake assembly, the air inlet cavity is formed in the first end of the shell, and the first end is a free end. The air inlet cavity, the fixing cavity, the air channel and the containing cavity are formed in the length direction, the internal space is reasonable in design, the whole air outlet component is slender and uniform, and a user can use the air outlet component comfortably.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a reasonably arranged air outlet component and a portable fan. Background Art

[0002] In recent years, people are increasingly pursuing a more convenient life. In order to meet the demand for using fans in outdoor activities or other life scenarios, a variety of portable fan products have appeared on the market, such as handheld fans, neck-hanging fans, etc.

[0003] In current portable fans, the air duct and the fixed cavity for accommodating the fan are usually arranged together horizontally, or the air duct and the accommodating cavity for accommodating the battery are usually arranged together horizontally, and the layout of the portable fan is not reasonable. Summary of the Invention

[0004] In view of this, the present application provides an air outlet component and a portable fan. By arranging an air inlet cavity, a fixed cavity, an air duct and a accommodating cavity along the length direction, the internal space is reasonably designed, which is conducive to making the air outlet component as a whole slender and symmetrical, and comfortable for users to use.

[0005] The present application provides an air outlet component, comprising: a shell, comprising a cavity, and an air inlet and a first air outlet connected to the cavity, the cavity being provided with an air inlet cavity, a fixed cavity, an air duct and a accommodating cavity along the length direction, the air inlet being connected to the air inlet cavity, and the first air outlet being connected to the air duct; a brake assembly, accommodated in the fixed cavity, the brake assembly being used to suck air from the air inlet, pass through the air inlet cavity, the brake assembly and the air duct, and then blow it out from the first air outlet; a control assembly, comprising a power supply for providing power to the brake assembly, and a control assembly for controlling the brake assembly, the power supply being accommodated in the accommodating cavity, and the control assembly being accommodated in the air inlet cavity; wherein the power supply is electrically connected to the control assembly, the control assembly is electrically connected to the brake assembly, the air inlet cavity is arranged at a first end portion of the shell, and the first end portion is a free end.

[0006] Furthermore, the length of the air duct is 4-6 times the length of the air inlet cavity, the maximum cross-sectional area of ​​the air duct is smaller than the minimum cross-sectional area of ​​the air inlet cavity, the maximum cross-sectional area of ​​the fixed cavity is smaller than or equal to the minimum cross-sectional area of ​​the air inlet cavity, and the minimum cross-sectional area of ​​the fixed cavity is greater than or equal to the maximum cross-sectional area of ​​the air duct.

[0007] Furthermore, the length of the air duct is 4-6 times the length of the air inlet cavity, the maximum cross-sectional area of ​​the air duct is smaller than the minimum cross-sectional area of ​​the air inlet cavity, the maximum cross-sectional area of ​​the fixed cavity is smaller than or equal to the minimum cross-sectional area of ​​the air inlet cavity, and the minimum cross-sectional area of ​​the fixed cavity is greater than or equal to the maximum cross-sectional area of ​​the air duct.

[0008] Furthermore, the portion of the shell in the fixed cavity is cylindrical, the diameter of the portion of the shell in the fixed cavity is 28-35 mm, and the length of the shell in the fixed cavity is 30-40 mm.

[0009] Furthermore, the cavity also includes an extension portion, which is arranged in parallel with the accommodating cavity, and the maximum cross-sectional diameter of the extension portion and the accommodating cavity is less than 36.5 mm; the extension portion is connected to the air duct, and the shell is also provided with a second air outlet connected to the extension portion, and the brake assembly sucks in air from the air inlet, and part of the wind passes through the air inlet cavity, the fixed cavity, the air duct and the extension portion, and is then blown out from the second air outlet.

[0010] Furthermore, the brake assembly includes a motor and a fan, the motor includes a cylinder, a stator assembly and a rotor assembly, the motor is a three-phase high-speed motor, and at least a portion of the fan is disposed in the cylinder.

[0011] Furthermore, the brake assembly also includes a buffer sleeve arranged outside the cylinder, the buffer sleeve includes an annular portion, and a plurality of protrusions arranged at intervals around the outer surface of the annular portion. When the brake assembly is accommodated in the fixed cavity, at least part of the plurality of protrusions is compressed; a first limiting portion is provided between the fixed cavity and the air inlet cavity, and a second limiting portion is provided between the fixed cavity and the air duct. The buffer sleeve also includes a edging portion connecting the two ends of the buffer sleeve, the edging portion at one end isolates and buffers the end of the cylinder and the first limiting portion, and the edging portion at the other end isolates and buffers the end of the cylinder and the second limiting portion.

[0012] Furthermore, the cylinder body includes an outer ring portion, an inner ring portion, and a plurality of connecting blades connecting the outer ring portion and the inner ring portion, the inner ring portion is arranged on a side of the outer ring portion close to the air duct, a base plate is provided in the inner ring portion, and a hollow shaft cylinder extends axially from the base plate toward the air inlet chamber, the rotor assembly includes a rotating shaft, a bearing and a magnetic ring, the rotating shaft and at least one bearing are arranged in the shaft cylinder, the stator assembly is arranged radially outside the rotating shaft and the shaft cylinder, and the magnetic ring is arranged radially outside the stator assembly; the fan is arranged on a side of the outer ring portion close to the air inlet chamber, and the fan is fixed on the rotating shaft; the inner ring portion is formed with a receiving portion on the side of the substrate facing the air duct, a drive plate is provided in the receiving portion, the control component is electrically connected to the drive plate, and the substrate is also provided with a notch, and a wire is electrically connected to the stator assembly and the drive plate via the notch.

[0013] Furthermore, the shell includes a first shell and a second shell, the air inlet cavity is arranged in the first shell, the fixed cavity, the air duct and the accommodating cavity are arranged in the second shell, and the first shell and the second shell are detachably connected.

[0014] Furthermore, the length of the first shell is 30-38 mm, the control component is arranged at the free end of the first shell, the control component also includes a switch or interface exposed outside the free end of the first shell, and the air inlet is arranged through the side of the first shell.

[0015] The present application also provides a portable fan, comprising the air outlet component as described above, the portable fan comprising two of the air outlet components, the two air outlet components being fixedly connected or pivotally connected, the connection position of the two air outlet components being located at one of the second end portion of the shell, the side portion of the shell close to the second end portion, and the position where the second end portion and the side portion of the shell are connected; or, the portable fan comprising one of the air outlet components, the shell being symmetrically provided with two of the air inlet chambers, two of the fixed chambers, two of the air ducts and two of the accommodating chambers, the two brake assemblies being respectively provided in the two fixed chambers, and the two control assemblies being respectively provided in the two accommodating chambers.

[0016] Compared with the prior art, the air outlet component and the portable fan of the present application have the following beneficial effects: by arranging the air inlet chamber, the fixed chamber, the air duct and the accommodating chamber along the length direction, the brake assembly is accommodated in the fixed chamber, the control assembly is accommodated in the accommodating chamber, and the internal space is reasonably designed, which is conducive to making the air outlet component slender and symmetrical as a whole, and comfortable for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the portable fan of the present application;

[0018] Figure 2 is a cross-sectional view of the portable fan of the present application;

[0019] Figure 3 is a schematic diagram of the portable fan of the present application from another angle;

[0020] Figure 4 It is a partial exploded view of the portable fan of the present application;

[0021] Figure 5 yes Figure 2 Enlarged view of part C;

[0022] Figure 6 It is a cross-sectional view of the brake assembly of the present application. DETAILED DESCRIPTION

[0023] In order to facilitate a better understanding of the purpose, structure, features and effects of this application, this application is further described in conjunction with the accompanying drawings and specific implementation methods.

[0024] It should be noted that when an element is considered to be “connected to” another element, it can be directly connected to the other element or there may be an intervening element at the same time.

[0025] In this application, descriptions such as “first”, “second”, etc. are only used for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0026] In the description of this application, the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on this application.

[0027] In one embodiment, Figure 1 and Figure 2 The figure shows a schematic diagram of the portable fan of the present application. The portable fan includes an air outlet component 100, and the air outlet component 100 includes a shell 1, a brake assembly and a control assembly. The shell 1 includes a cavity and an air inlet 11 and a first air outlet 121 connected to the cavity. The cavity is provided with an air inlet cavity 13, a fixed cavity 14, an air duct 15 and a accommodating cavity 16 along the length direction. The air inlet 11 is connected to the air inlet cavity 13, and the first air outlet 121 is connected to the air duct 15. The brake assembly is accommodated in the fixed cavity 14. The brake assembly is used to suck air from the air inlet 11, pass through the air inlet cavity 13, the brake assembly and the air duct 15, and then blow it out from the first air outlet 121. The control assembly includes a power supply 41 for providing power to the brake assembly, and a control assembly 42 for controlling the brake assembly. The power supply 41 is accommodated in the accommodating cavity 16, and the control assembly 42 is accommodated in the air inlet cavity 13. The power supply 41 is electrically connected to the control component 42, which is in turn electrically connected to the brake assembly. By arranging the air inlet chamber 13, the fixed chamber 14, the air duct 15, and the accommodating chamber 16 along the length, with the brake assembly housed in the fixed chamber 14 and the control assembly housed in the accommodating chamber 16, the rational internal space design facilitates a slender and well-proportioned overall air outlet component, providing a comfortable fit for the user.

[0028] It should be understood that in this embodiment, the air inlet chamber 13, the fixed chamber 14, the air duct 15, and the accommodating chamber 16 are sequentially provided along the length direction of the cavity. Of course, in other embodiments, the air inlet chamber 13, the fixed chamber 14, and the air duct 15 may be sequentially provided along the length direction of the cavity, and the accommodating chamber 16 may be provided on one side of the air inlet chamber 13 or on one side of the air duct 15.

[0029] In one embodiment, Figure 1 and Figure 2 As shown, the length of the air inlet cavity 13 is 20-30 mm, the length of the air duct 15 is 4-6 times the length of the air inlet cavity 13, the maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along the length direction, and the transition between any two adjacent ones of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 is smooth. The air inlet cavity 13 is short in length but has a larger cross-sectional area, which is conducive to air suction and diversion, thereby increasing the air intake volume. The provision of the air inlet cavity 13 can effectively avoid turbulence and noise caused by direct contact between the external airflow and the brake assembly. The cross-section of the air duct 15 is small, and the wind generated by the brake assembly is pressurized and concentrated in the air duct 15, thereby enhancing the wind outlet effect; the length of the air duct 15 is long, which can increase the wind outlet range and improve the blowing experience.

[0030] In one embodiment, Figure 1 and Figure 2 As shown, the portion of the housing 1 within the fixed cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm within the fixed cavity 14. The smaller diameter of the fixed cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and well-proportioned portable fan, making it easier to carry. The shorter length of the fixed cavity 14 also allows for a more reasonable length of the air duct 15.

[0031] In one embodiment, Figures 2 to 4As shown, the housing also includes an extension 19. The extension 19 is arranged side by side with the accommodating chamber 16. The maximum cross-sectional diameter of the extension 19 and the accommodating chamber 16 is less than 36.5 mm. Therefore, even though the extension 19 and the accommodating chamber 16 are arranged side by side, the cross-sectional area of ​​the extension 19 and the accommodating chamber 16 is still small, and the overall volume of the portable fan remains small. The extension 19 is connected to the air duct 15, and the housing 1 is also provided with a second air outlet 122 connected to the extension 19. The brake assembly draws air from the air inlet 11. Part of the air passes through the air inlet chamber 13, the brake assembly, and the air duct 15, and is then blown out of the first air outlet 121. Part of the air passes through the air inlet chamber 13, the fixed chamber 14, the air duct 15, and the extension 19, and is finally blown out of the second air outlet 122. The provision of the extension 19 and the second air outlet 122 extends the air outlet range of the portable fan, improving the user experience.

[0032] In one embodiment, Figure 2 、 Figure 4 and Figure 5 As shown, the brake assembly includes a motor 2 and a fan 3. The motor 2 includes a barrel 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor 2 that can provide a high and stable speed, thereby improving the air output effect. At least a portion of the fan 3 is disposed within the barrel 21. In this embodiment, the entire fan 3 is disposed within the barrel 21. Therefore, the brake assembly has a compact and reasonable structure, and the length of the cavity occupied is relatively short.

[0033] In one embodiment, Figure 2 、 Figure 4 and Figure 5 As shown, the brake assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface of the annular portion 331. When the brake assembly is received in the fixing cavity 14, at least a portion of the protrusions 332 are compressed, thereby firmly securing the brake assembly to the fixing cavity 14. The buffer sleeve 33 provides strong friction and shock absorption for the brake assembly, effectively reducing noise generated by the brake assembly.

[0034] In one embodiment, Figure 2 、 Figure 4 and Figure 5As shown, a first limiting portion 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting portion 18 is provided between the fixed cavity 14 and the air duct 15. The buffer sleeve 33 also includes a rim portion 333 connecting the two ends of the buffer sleeve 33. The rim portion 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting portion 17, and the rim portion 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting portion 18. The rim portion 333 further provides buffering and shock absorption capabilities for the brake assembly, further reducing the noise generated by the brake assembly. In addition, the cooperation between the first limiting portion 17, the second limiting portion 18 and the rim portions 333 at both ends further limits the axial movement of the brake assembly, so that the brake assembly is firmly fixed to the fixed cavity 14, and the brake assembly can generate wind stably, continuously and quietly. The material of the buffer sleeve 33 can be silicone, foam, or other materials with buffering capabilities, which are not limited to the examples. Of course, in other embodiments, the brake assembly may not be provided with the buffer sleeve 33 .

[0035] In one embodiment, Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, the cylinder 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is provided on the side of the outer ring portion 211 close to the air duct 15, and the inner ring portion 212 is slightly protruded toward the air duct 15. Therefore, the side of the outer ring portion 211 facing the air inlet chamber 13 has more space for arranging other structures, and the space layout within the cylinder 21 is reasonable. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft barrel 215 extends axially from the base plate 214 toward the air inlet chamber 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are provided in the shaft barrel 215. In this embodiment, the number of the bearings 232 is two, and both bearings 232 are provided in the shaft barrel 215. Of course, one of the two bearings 232 may be disposed inside the shaft cylinder 215, while the other may be disposed outside the shaft cylinder 215, as long as a secure fit between the rotating shaft 231 and the shaft cylinder 215 is ensured. The stator assembly 22 is disposed radially outward of the rotating shaft 231 and the shaft cylinder 215, and the magnetic ring 233 is disposed radially outward of the stator assembly 22. The fan 3 is disposed on a side of the outer ring portion 211 that is close to the air inlet chamber 13, and the fan 3 is fixed to the rotating shaft 231.

[0036] In one embodiment, Figures 4 to 6As shown, the rotor assembly 23 also includes a housing 234, which is sleeved outside the magnetic ring 233 and tightly fits the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231 and is coaxially arranged with the motor 2. The fan 3 and the housing 234 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and the housing 234 to rotate, and the housing 234 drives the rotating shaft 231 and the fan 3 to rotate simultaneously. This eliminates the need for additional transmission devices on the motor 2 and the fan 3, effectively improving the transmission efficiency of the portable fan.

[0037] In one embodiment, Figures 4 to 6 As shown, the fan 3 includes a hub 31 and a plurality of blades 32 arranged at intervals around the outside of the hub 31. The difference between any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring portion 212 is less than 2 mm. The wind generated by the plurality of blades 32 can smoothly pass through the area between the housing 234 and the outer ring portion 211, and the area between the inner ring portion 212 and the outer ring portion 211, and blow toward the air duct 15. The hub 31, the housing 234, and the inner ring portion 212 are axially arranged, and the diameters of the three are similar, so that the motor 2 and the fan 3 have a compact structure.

[0038] In one embodiment, Figures 4 to 6 As shown, the inner ring portion 212 is formed with a receiving portion 216 on the side of the base plate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly fixed to the inner ring portion 212 and is disposed toward the air duct 15, facilitating the connection between the drive plate 24 and other electrical components. The base plate 214 also has a notch, through which a wire electrically connects the stator assembly 22 and the drive plate 24.

[0039] In one embodiment, Figures 3 to 6As shown, the portable fan is a neck-hanging fan, and the portable fan includes two air outlet components 100. The two air inlet chambers 13 are respectively provided at the first end 1A of the two shells 1, and the first end 1A is a free end, and the two accommodating chambers 16 are provided at the second end 1B of the two shells 1, and the second end 1B is a connecting end. Further, the shell 1 includes a first shell 1a and a second shell 1b, the air inlet chamber 13 is provided in the first shell 1a, the fixed chamber 14, the air duct 15 and the accommodating chamber 16 are provided in the second shell 1b, and the first shell 1a and the second shell 1b are detachably connected. The length of the first shell 1a is 30-38mm, and the control component 42 is provided at the free end of the first shell 1a. The control component 42 also includes a switch 43 or an interface 44 exposed outside the free end of the first shell 1a, and the air inlet 11 is provided through the side of the first shell 1a.

[0040] In this embodiment, if Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, the two air outlet components 100 are pivotally connected, and the position where the two air outlet components 100 are connected is located at the position where the second end 1B of the shell 1 and the side of the shell 1 are connected. The user rotates the two air outlet components 100 outward to facilitate the user to wear or take off; the user closes the two air outlet parts inward to fix them to the user's neck to prevent them from getting loose. And the position where the two air outlet components 100 are connected is located on the side close to the human neck. Therefore, during the process of rotating outward and closing inward between the two air outlet components 100, the user's neck will not be pinched, and it is safer for the user to use. In other embodiments, the position where the two air outlet components 100 are connected may also be the second end 1B of the shell 1, or the side of the shell 1 close to the second end 1B. In other embodiments, the two air outlet components 100 may also be fixedly connected.

[0041] In this embodiment, when the portable fan is worn on the user's neck, the first air outlet 121 blows toward the user's head, and the second air outlet 122 is simultaneously provided on the upper and lower sides of the extension portion 19, and the second air outlet 122 can blow toward the user's head and the user's neck at the same time; or the first air outlet 121 blows toward the user's neck, and the second air outlet 122 is simultaneously provided on the upper and lower sides of the extension portion 19, and the second air outlet 122 can blow toward the user's head and the user's neck at the same time.

[0042] Of course, it should be understood that in other embodiments, the portable fan may have only one air outlet component 100, and the housing 1 may be symmetrically provided with two air inlet chambers 13, two fixed chambers 14, two air ducts 15, and two accommodating chambers 16. The two brake assemblies are respectively provided in the two fixed chambers 14, and the two control assemblies are respectively provided in the two accommodating chambers 16. In addition, in other embodiments, the portable fan may be a handheld fan, a clip fan, a versatile fan, or other portable fan, and the examples are not limiting.

[0043] The above detailed description is only an illustration of the preferred embodiment of the present application, and does not limit the patent scope of the present application. Therefore, all equivalent technical changes made by using the description and illustrations of this invention are included in the patent scope of this invention.

Claims

1. An air outlet component, characterized in that: include: The housing comprises a cavity, and an air inlet and a first air outlet connected to the cavity, wherein the cavity is provided with an air inlet cavity, a fixed cavity, an air duct and a receiving cavity along the length direction, the air inlet is connected to the air inlet cavity, and the first air outlet is connected to the air duct; a brake assembly housed in the fixed cavity, the brake assembly being used to draw air from the air inlet, pass through the air inlet cavity, the brake assembly and the air duct, and finally blow it out from the first air outlet; a control assembly, comprising a power supply component for providing power to the brake assembly, and a control component for controlling the brake assembly, the power supply component being accommodated in the accommodating cavity, and the control component being accommodated in the air inlet cavity; The power supply is electrically connected to the control component, the control component is electrically connected to the brake assembly, and the air inlet cavity is provided at the first end of the shell, which is a free end.

2. The air outlet component according to claim 1, wherein: The length of the air duct is 4-6 times the length of the air inlet cavity, the maximum cross-sectional area of ​​the air duct is smaller than the minimum cross-sectional area of ​​the air inlet cavity, the maximum cross-sectional area of ​​the fixed cavity is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity, and the minimum cross-sectional area of ​​the fixed cavity is greater than or equal to the maximum cross-sectional area of ​​the air duct.

3. The air outlet component according to claim 1, wherein: The portion of the shell in the fixed cavity is cylindrical, the diameter of the portion of the shell in the fixed cavity is 28-35 mm, and the length of the shell in the fixed cavity is 30-40 mm.

4. The air outlet component according to claim 1, wherein: The cavity also includes an extension portion, which is arranged in parallel with the accommodating cavity, and the maximum cross-sectional diameter of the extension portion and the accommodating cavity is less than 36.5 mm; the extension portion is connected to the air duct, and the shell is also provided with a second air outlet connected to the extension portion. The brake assembly sucks in air from the air inlet, and part of the wind passes through the air inlet cavity, the fixed cavity, the air duct and the extension portion, and is then blown out from the second air outlet.

5. The air outlet component according to claim 1, wherein: The brake assembly includes a motor and a fan. The motor includes a cylinder, a stator assembly and a rotor assembly. The motor is a three-phase high-speed motor. At least a portion of the fan is disposed in the cylinder.

6. The air outlet component according to claim 5, characterized in that: The brake assembly also includes a buffer sleeve arranged outside the cylinder, the buffer sleeve includes an annular portion, and a plurality of protrusions arranged at intervals around the outer surface of the annular portion. When the brake assembly is accommodated in the fixed cavity, at least part of the plurality of protrusions is compressed; a first limiting portion is provided between the fixed cavity and the air inlet cavity, and a second limiting portion is provided between the fixed cavity and the air duct. The buffer sleeve also includes a edging portion connecting the two ends of the buffer sleeve, the edging portion at one end isolates and buffers the end of the cylinder and the first limiting portion, and the edging portion at the other end isolates and buffers the end of the cylinder and the second limiting portion.

7. The air outlet component according to claim 5, characterized in that: The cylinder body includes an outer ring portion, an inner ring portion, and a plurality of connecting blades connecting the outer ring portion and the inner ring portion, the inner ring portion is arranged on a side of the outer ring portion close to the air duct, a base plate is provided in the inner ring portion, and a hollow shaft cylinder extends axially from the base plate toward the air inlet chamber, the rotor assembly includes a rotating shaft, a bearing and a magnetic ring, the rotating shaft and at least one bearing are arranged in the shaft cylinder, the stator assembly is arranged radially outside the rotating shaft and the shaft cylinder, and the magnetic ring is arranged radially outside the stator assembly; the fan is arranged on a side of the outer ring portion close to the air inlet chamber, and the fan is fixed on the rotating shaft; the inner ring portion is formed with a receiving portion on the side of the substrate facing the air duct, the drive plate is arranged in the receiving portion, the control component is electrically connected to the drive plate, and the substrate is also provided with a notch, and the wire is electrically connected to the stator assembly and the drive plate via the notch.

8. The air outlet component according to claim 1, wherein: The shell includes a first shell and a second shell, the air inlet cavity is provided in the first shell, the fixing cavity, the air duct and the accommodating cavity are provided in the second shell, and the first shell and the second shell are detachably connected.

9. The air outlet component according to claim 8, characterized in that: The length of the first shell is 30-38 mm, the control component is arranged at the free end of the first shell, the control component also includes a switch or interface exposed outside the free end of the first shell, and the air inlet is arranged through the side of the first shell.

10. A portable fan comprising the air outlet component according to any one of claims 1 to 9, characterized in that: The portable fan comprises two air outlet components, the two air outlet components are fixedly connected or pivotally connected to each other, and the connection position of the two air outlet components is located at one of the second end of the housing, the side of the housing close to the second end, and the position where the second end and the side of the housing are connected; or, The portable fan includes an air outlet component, and two air inlet chambers, two fixed chambers, two air ducts and two accommodating chambers are symmetrically arranged in the shell. The two brake components are respectively arranged in the two fixed chambers, and the two control components are respectively arranged in the two accommodating chambers.

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