Air outlet component

Abstract

The invention provides an air outlet component which comprises a cylinder body, a plurality of first guide vanes and a plurality of second guide vanes. The cylinder body comprises an outer ring part, an inner ring part and a plurality of second guide vanes, the brake assembly and the outer ring part are coaxially arranged, the brake assembly comprises a fan and a motor, and the fan comprises a wheel shell and a plurality of blades arranged on the outer surface of the wheel shell at intervals; the flow guide part comprises an inner shell part, an outer shell part and a plurality of second guide vanes connected with the inner shell part and the outer shell part; wherein the difference between the maximum diameter of the wheel shell and the diameter of the inner ring part is smaller than 5 mm, the difference between the maximum diameter of the inner shell part and the diameter of the inner ring part is smaller than 5 mm, and the difference between the diameter of the inner wall of the outer shell part and the diameter of the inner wall of the outer ring part is smaller than 5 mm. The difference between the maximum diameter of the wheel shell, the diameter of the inner ring part and the maximum diameter of the inner shell part is small, wind can smoothly flow through the outer surface of the wheel shell, the outer surface of the inner ring part and the outer surface of the inner shell part, and the wind energy loss is small.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to an air outlet component with good air outlet effect. Background Art

[0002] As the size of everyday electronic products continues to shrink, demands for fan size and portability are also increasing. While conventional axial-flow fans offer high airflow, their wind pressure is generally low. Furthermore, the blades of axial-flow fans typically extend in a spiral along the hub, resulting in turbulent airflow generated by the rotation of the fan blades.

[0003] To reduce the turbulence generated by fan blades and prevent ineffective airflow, multiple stator blades are typically placed in front of the fan blades. These blades help smooth out the turbulent airflow, streamlining it to a certain degree. However, a single stator blade can only provide limited airflow control. Furthermore, the blades can cause some airflow rebound, resulting in lower fan efficiency. Therefore, a solution is urgently needed. Summary of the Invention

[0004] In view of this, the present application provides an air outlet component, comprising: a cylindrical body, comprising an outer ring portion and an inner ring portion; a brake assembly, coaxially arranged with the outer ring portion, the brake assembly comprising a fan and a motor, the fan comprising a wheel housing; and a flow guide, comprising an inner shell portion and an outer shell portion. Due to the structure of the outer ring portion, which is continuous from front to back, and the inner ring portion, coaxially arranged with the outer ring portion, and the brake assembly, the axial variation of the inner cavity diameter of the outer ring portion is small, and the maximum diameter of the wheel housing, the diameter of the inner ring portion, and the maximum diameter of the inner shell portion are relatively small. Wind can flow smoothly through the outer surface of the wheel housing, the outer surface of the inner ring portion, and the outer surface of the inner shell portion, resulting in minimal wind energy loss.

[0005] The present application provides an air outlet component, comprising: a cylinder, comprising an outer ring portion, an inner ring portion, and a plurality of first guide vanes connecting the outer ring portion and the inner ring portion, the outer ring portion is through-connected front to back, with air entering at the rear end and air exiting at the front end, and a diameter variation of the inner wall of the outer ring portion from back to front is less than 5 mm, the inner ring portion is coaxially arranged with the outer ring portion, and the inner ring portion extends radially unchanged from back to front; a brake assembly is coaxially arranged with the outer ring portion, the brake assembly is mounted on the rear side of the inner ring portion, and is radially accommodated inside the outer ring portion, the brake assembly comprises a fan and a motor, and the fan It includes a wheel shell and a plurality of blades arranged at intervals on the outer surface of the wheel shell, the motor is arranged on the radial inner side of the wheel shell; a flow guide is coaxially arranged with the outer ring portion, the flow guide is installed on the front side of the cylinder, the flow guide includes an inner shell portion, an outer shell portion, and a plurality of second guide vanes connecting the inner shell portion and the outer shell portion; wherein, the maximum diameter of the wheel shell and the diameter of the inner ring portion differ by less than 5 mm, the maximum diameter of the inner shell portion and the diameter of the inner ring portion differ by less than 5 mm, and the difference between the diameter of the inner wall of the outer shell portion and the diameter of the inner wall of the outer ring portion is less than 5 mm.

[0006] Furthermore, the diameter of the inner wall of the outer ring portion remains unchanged from back to front, and the diameter of the inner wall of the outer shell portion remains unchanged from back to front. The diameter of the inner wall of the outer shell portion is equal to the diameter of the inner wall of the outer ring portion, and the diameter of the inner wall of the outer shell portion and the diameter of the inner wall of the outer ring portion are 30 to 36 mm; the wheel shell radially increases from back to front, and the inner shell portion radially decreases from back to front, and the maximum diameter of the wheel shell, the maximum diameter of the inner shell portion and the diameter of the inner ring portion are all in the range of 19.24 to 23.24 mm; the spacing between the front end of the wheel shell and the inner ring portion is 0.5 to 3 mm, and the spacing between the inner shell portion and the inner ring portion is 0.15 to 1 mm.

[0007] Furthermore, a base plate and a hollow shaft cylinder extending backward from the base plate are provided in the inner ring portion, and the motor includes a stator assembly and a rotor assembly, and the stator assembly, the rotor assembly and the fan are nested and fixed in the shaft cylinder; the rotor assembly includes a rotating shaft, a bearing and a magnetic ring, and the rotating shaft and the bearing are inserted and fixed in the shaft cylinder, the stator assembly is provided on the radial outside of the shaft cylinder, the magnetic ring is provided on the radial outside of the stator assembly, and the magnetic ring is fixed on the radial inside of the wheel shell.

[0008] Furthermore, the wheel shell includes a rear end portion, an enlarged portion that radially increases from the rear end portion to the front, and a smooth portion that remains radially unchanged from the enlarged portion to the front, the slope of the enlarged portion continuously decreases from the back to the front, the axial length of the enlarged portion is 12.9 to 16.9 mm, and the axial length of the smooth portion is 6.13 to 10.13 mm; the wheel shell also includes a fixing column located at the inner center, and the fixing column is used to fix the rotating shaft.

[0009] Furthermore, the inner shell portion is radially reduced from rear to front, and the axial length of the inner shell portion is 13 to 17 mm; a column is provided at the inner center of the inner shell portion, and the column is inserted backward and fixed to the shaft cylinder.

[0010] Furthermore, each of the blades includes a blade root portion connected to the wheel shell, a blade top portion opposite to the blade root portion, a leading edge portion connecting the blade root portion and the blade top portion, and a trailing edge portion connecting the blade root portion and the blade top portion, and the leading edge portion and the trailing edge portion are arranged opposite to each other; the front end of the blade root portion is arranged within a range of 1.5 mm before and after the connection between the expanded portion and the smooth portion.

[0011] Furthermore, each of the first guide vanes includes a first section and a second section extending backward from the first section, the first section connects the inner ring portion and the outer ring portion at the same time, the second section is only connected to the outer ring portion, and the radial inner side of the second section is spaced from the wheel shell; from back to front, the blade extends in a clockwise spiral, the second section extends in a counterclockwise spiral, the first section extends straight, and the second guide vane first extends in a clockwise spiral and then extends straight.

[0012] Furthermore, the distance between the rear end of the second section and the leading edge is 1.25 to 3.25 mm, and the distance between the front end of the first section and the rear end of the second guide vane is 0.4 to 1.4 mm.

[0013] Furthermore, the number of the blades is 9, the number of the first guide vanes is 7, and the number of the second guide vanes is 7. Multiple first guide vanes and multiple second guide vanes are radially spaced apart, and the axial projection of one first guide vane is located between the axial projections of two adjacent second guide vanes.

[0014] Furthermore, the ratio of the axial length of the blade to the axial length of the first guide vane is in the range of 7:8 to 11:12, and the ratio of the axial length of the first guide vane to the axial length of the second guide vane is in the range of 12:7 to 8:3.

[0015] Compared with the prior art, the air outlet component of the present application has the following beneficial effects: through the outer ring portion that passes through the front and back, and the inner ring portion and the brake assembly structure that are coaxially arranged with the outer ring portion, the axial change of the inner cavity diameter of the outer ring portion is small, and the maximum diameter of the wheel shell, the diameter of the inner ring portion and the maximum diameter of the inner shell portion are slightly different. The wind can flow smoothly through the outer surface of the wheel shell, the outer surface of the inner ring portion and the outer surface of the inner shell portion, and the wind energy loss is small, so that a large air volume can be achieved when the air outlet component is designed to be small and portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the portable fan of the present application;

[0017] Figure 2 is an exploded view of the portable fan of the present application;

[0018] Figure 3 is a cross-sectional side view of the portable fan of the present application;

[0019] Figure 4 is a side sectional view of an air outlet component and a retracting component in the portable fan of the present application;

[0020] Figure 5 is a cross-sectional view of the portable fan of the present application from above;

[0021] Figure 6 is a rear cross-sectional view of the portable fan of the present application;

[0022] Figure 7 is another cross-sectional view of the portable fan of the present application from the rear;

[0023] Figure 8 It is a three-dimensional diagram of the blower in the portable fan of the present application. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In one embodiment, Figure 1 The figure shows a portable fan 1. In this embodiment, the portable fan 1 is a handheld fan, and thus includes a handheld portion (not numbered, the same below), within which is disposed a circuit board and a battery (not numbered, the same below). The circuit board is used for control circuitry, and the battery is used for power supply. In other embodiments, the portable fan 1 may also be a clip fan, a desktop fan, a neck-hanging fan, or other portable fans.

[0029] In one embodiment, Figures 2 to 4 As shown, the portable fan includes a shell 1, an air outlet component and a contraction component 6. The shell 1 is through-connected from front to back, with air entering from the rear side and out from the front side. The air outlet component is accommodated in the shell 1, and the air outlet component includes a cylinder 2 and a brake assembly accommodated in the cylinder 2. The brake assembly includes a fan 3 and a motor 4. The motor 4 drives the fan 3 to rotate and generate wind. The contraction component 6 is accommodated in the shell 1 and is arranged on the front side of the air outlet component. The contraction component 6 includes a contraction surface 61 located on the inner side. The contraction surface 61 is arranged toward the air duct, and the contraction surface 61 radially shrinks from the back to the front. The contraction component 6 is provided, and the contraction component 6 has the contraction surface 61 facing the air duct, and the contraction surface 61 radially shrinks from the back to the front, which is conducive to contracting and converging the airflow derived from the air outlet component, enhancing the wind pressure, and increasing the wind force.

[0030] In one embodiment, Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, the cylinder 2 includes an outer ring portion 21, an inner ring portion 22, and a plurality of first guide vanes 23 connecting the outer ring portion 21 and the inner ring portion 22. The outer ring portion 21 is continuous from front to back, with air entering at the rear end and exiting at the front end. The diameter of the inner wall of the outer ring portion 21 varies by less than 5 mm from back to front. The inner ring portion 22 is coaxially arranged with the outer ring portion 21 and extends radially in a constant manner from back to front. The air outlet component also includes a deflector 5, which is axially disposed between the cylinder 2 and the constriction member 6. The deflector 5 is coaxially arranged with the outer ring portion 21 and is mounted on the front side of the cylinder 2. The deflector 5 includes an outer shell portion 51, an inner shell portion 52, and a plurality of second guide vanes 53 connecting the outer shell portion 51 and the inner shell portion 52. The difference between the diameter of the inner wall of the outer shell portion 51 and the inner wall of the outer ring portion 21 is less than 5 mm.

[0031] In this embodiment, if Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, the inner wall diameter of the outer ring portion 21 remains constant from back to front, and the inner wall diameter of the outer shell portion 51 remains constant from back to front. The inner wall diameter of the outer ring portion 21 is equal to the inner wall diameter of the outer shell portion 51. This arrangement forms a ventilation duct that runs through the front and back, reducing wind energy loss. The inner wall diameters of the outer shell portion 51 and the inner wall diameters of the outer ring portion 21 are 30 to 36 mm. The relatively small diameters of the outer shell portion 51 and the outer ring portion 21 make the portable fan compact and easy to carry.

[0032] In one embodiment, Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, the maximum diameter of the contraction surface 61 is equal to the diameter of the inner wall of the outer shell 51, and the minimum diameter of the contraction surface 61 is greater than the maximum diameter of the inner shell 52. The minimum diameter of the contraction surface 61 is 21.05 to 25.05 mm. The inner shell 52 protrudes forward relative to the outer shell 51, and the front end of the inner shell 52 is located radially inward of the contraction surface 61. The front end of the contraction surface 61 is located in front of the front end of the inner shell 52. There is a gap between the outer surface of the inner shell 52 and the contraction surface 61, forming an air duct that gathers and guides wind. The contraction surface 61 has the function of enhancing wind pressure, concentrating strong wind in the middle and then blowing it toward the user, which has a good blowing effect.

[0033] In one embodiment, Figures 2 to 4As shown, a base plate 221 is provided in the inner ring portion 22, and a hollow shaft barrel 222 extending backward from the base plate 221. The motor 4 includes a stator assembly 41 and a rotor assembly 42. The stator assembly 41, the rotor assembly 42 and the fan 3 are nested and fixed in the shaft barrel 222. The rotor assembly 42 includes a rotating shaft 421, a bearing 422 and a magnetic ring 423. The rotating shaft 421 and the bearing 422 are inserted and fixed in the shaft barrel 222. The stator assembly 41 is provided on the radial outer side of the shaft barrel 222, and the magnetic ring 423 is provided on the radial outer side of the stator assembly 41. The magnetic ring 423 is fixed on the radial inner side of the wheel shell 31. The motor 4 is an outer rotor motor 4, which is in the form of an outer rotor and has a more compact and reasonable structure.

[0034] In one embodiment, Figures 2 to 4 As shown, the axial length of the inner shell 52 is 13-17 mm. The inner shell 52 radially decreases from the back to the front, and has a spherical appearance, guiding the airflow to converge and flow forward. A column 521 is provided at the center of the inner shell 52, and the column 521 is inserted and fixed to the shaft cylinder 222.

[0035] In one embodiment, Figures 2 to 5 As shown, the brake assembly is coaxially arranged with the outer ring portion 21. The brake assembly is mounted on the rear side of the inner ring portion 22 and radially housed inside the outer ring portion 21. The brake assembly includes a fan 3 and a motor 4. The fan 3 includes a housing 31 and a plurality of blades 32 spaced apart on the outer surface of the housing 31. The motor 4 is located radially inward of the housing 31. The housing 31 radially increases from rear to front, while the inner ring portion 22 extends radially unchanged from rear to front. The inner housing 52 radially decreases from rear to front. The housing 31 partially draws in and directs air forward, while the inner housing 52 directs and focuses air forward. The maximum diameter of the housing 31 differs from the diameter of the inner ring portion 22 by less than 5 mm, and the maximum diameter of the inner housing 52 also differs from the diameter of the inner ring portion 22 by less than 5 mm. The maximum diameters of the housing 31, the inner housing 52, and the inner ring portion 22 all range from 19.24 to 23.24 mm. That is to say, the maximum diameter of the wheel shell 31, the diameter of the inner ring portion 22 and the maximum diameter of the inner shell portion 52 are slightly different from each other, and there is a smooth transition between the wheel shell 31, the inner ring portion 22 and the inner shell portion 52. The wind can flow smoothly through the outer surface of the wheel shell 31, the outer surface of the inner ring portion 22 and the outer surface of the inner shell portion 52, and the wind energy loss is small.

[0036] In this embodiment, if Figures 2 to 5As shown, the maximum diameter of the wheel shell 31, the maximum diameter of the inner shell 52, and the diameter of the inner ring 22 are equal, and the spacing between the front end of the wheel shell 31 and the inner ring 22 is 0.5-3 mm, and the spacing between the inner shell 52 and the inner ring 22 is 0.15-1 mm. Wind can flow smoothly from the outer surface of the wheel shell 31 to the outer surface of the inner ring 22, and then to the outer surface of the inner shell 52. Furthermore, the wind pressure is enhanced on the radially enlarged outer surface of the wheel shell 31, wind loss is reduced on the radially unchanged outer surface of the inner ring 22, and wind is concentrated and diverted on the radially reduced inner shell 52, resulting in a very reasonable structural design.

[0037] In one embodiment, Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, the wheel shell 31 includes a rear end portion 311, an expansion portion 312 that radially increases from the rear end portion 311 to the front, and a smooth portion 313 that remains radially unchanged from the expansion portion 312 to the front. The slope of the expansion portion 312 decreases continuously from the back to the front. The axial length of the expansion portion 312 is 12.9 to 16.9 mm, and the axial length of the smooth portion 313 is 6.13 to 10.13 mm. The axial length of the expansion portion 312 is longer, which is conducive to enhancing wind pressure; the smooth portion 313 also has a certain axial length, which is conducive to accommodating the motor 4 in the smooth portion 313. The wheel shell 31 also includes a fixing column 314 located at the inner center, and the fixing column 314 is used to fix the rotating shaft 421.

[0038] In one embodiment, Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, each blade 32 includes a blade root 321 connected to the wheel shell 31, a blade top 322 opposite the blade root 321, a leading edge 323 connecting the blade root 321 and the blade top 322, and a trailing edge 324 connecting the blade root 321 and the blade top 322. The leading edge 323 and the trailing edge 324 are arranged opposite each other. The front end of the blade root 321 is located within 1.5 mm before and after the connection between the expanded portion 312 and the smooth portion 313. It can be seen that the blade root 321 is mainly concentrated in the expanded portion 312, and the blades 32 are also mainly concentrated in the expanded portion 312, which is beneficial for the blades 32 to absorb and cut wind, and to increase wind pressure.

[0039] In one embodiment, Figures 3 to 6As shown, each first guide vane 23 includes a first section 231 and a second section 232 extending rearward from the first section 231. The first section 231 connects both the inner ring portion 22 and the outer ring portion 21, while the second section 232 connects only to the outer ring portion 21. The radially inner side of the second section 232 is spaced apart from the wheel housing 31. The distance between the rear end of the second section 232 and the leading edge portion 323 is 1.25 to 3.25 mm, and the distance between the front end of the first section 231 and the rear end of the second guide vane 53 is 0.4 to 1.4 mm. In other words, the axial spacing between the blades 32 and the first guide vanes 23 is small, and the axial spacing between the first guide vanes 23 and the second guide vanes 53 is small, allowing wind to flow smoothly from between the multiple blades 32 to between the multiple first guide vanes 23, and then to between the multiple second guide vanes 53. In addition, there are gaps between the blade 32 and the first guide vane 23, and between the first guide vane 23 and the second guide vane 53, which are conducive to pressure relief, avoid backflow caused by excessive wind pressure, and reduce wind energy loss.

[0040] In one embodiment, Figures 3 to 6 As shown, from back to front, the blades 32 extend in a clockwise spiral, the second section 232 extends in a counterclockwise spiral, the first section 231 extends straight, and the second guide vanes 53 first extend in a clockwise spiral and then extend straight. It can be seen that the airflow is guided multiple times from back to front, continuously combed and integrated, and finally flows straight forward, resulting in minimal wind energy loss and low noise.

[0041] In one embodiment, Figure 2 、 Figure 4 、 Figure 6 and Figure 7 As shown, the number of blades 32 is 9, the number of first guide vanes 23 is 7, and the number of second guide vanes 53 is 7. It should be understood that when the number of stationary blades and moving blades is similar, the stationary blades can better comb and integrate the airflow generated by the moving blades. The first guide vanes 23 and the second guide vanes 53 are stationary blades, and the blades 32 are moving blades. Multiple first guide vanes 23 and multiple second guide vanes 53 are spaced apart in the radial direction, with the axial projection of one first guide vane 23 located between the axial projections of two adjacent second guide vanes 53. This arrangement, while providing combing effects of the first guide vanes 23 and the second guide vanes 53 in the axial direction, also expands the combing range in the radial direction, further ensuring the combing and integration effect of the stationary blades and achieving better airflow.

[0042] In one embodiment, Figures 3 to 5As shown, the ratio of the axial length of the blade 32 to the axial length of the first guide vane 23 ranges from 7:8 to 11:12, and the ratio of the axial length of the first guide vane 23 to the axial length of the second guide vane 53 ranges from 12:7 to 8:3. It can be seen that the axial length of the blade 32 is close to that of the first guide vane 23, while the axial length of the first guide vane 23 is slightly longer than that of the blade 32, which immediately combs the airflow generated by the blade 32. The axial length of the first guide vane 23 is approximately twice that of the second guide vane 53. After being combed by the first guide vane 23, the airflow tends to be stable, eliminating the need for excessively long guide vanes. Therefore, the axial length of the second guide vane 53 is shorter, which helps reduce wind energy loss and improves the airflow effect.

[0043] In one embodiment, Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the invention also includes a soft shell 7. The soft shell 7 is disposed within the shell 1 and covers the outer sides of the barrel 2, the flow guide 5, and the contraction member 6. The soft shell 7 includes an annular portion 71, and a front edging portion 72 and a rear edging portion 73 connecting the front and rear ends of the annular portion 71. The annular portion 71 covers the radially outer sides of the outer ring portion 21, the outer shell portion 51, and the contraction member 6. The front edging portion 72 is disposed at the front end of the contraction member 6, and its edge is flush with the front end of the contraction surface 61. The rear edging portion 73 is disposed at the rear end of the outer ring portion 21, and its edge is flush with the rear end of the inner wall of the outer ring portion 21. The soft shell 7 provides a cushioning and shock-absorbing function and can better secure the barrel 2, the flow guide 5, and the contraction member 6 within the outer shell. The radially outer side of the soft shell 7 may be provided with convex bumps or ribs to enhance the securement. The radial inner side and / or radial outer side of the soft shell 7 may also be provided with recesses to enhance the buffering and shock absorbing effect.

[0044] In one embodiment, Figure 2 、 Figure 3 and Figure 5As shown, it also includes a front guide 8, a rear guide 9 and an air inlet net 10. The front guide 8 is embedded in the front end of the shell 1, and the rear end of the front guide 8 is against the front edging portion 72. The front guide 8 includes a front guide surface 81 located on the inner side, and the front guide surface 81 radially increases from the back to the front, and the rear end of the front guide surface 81 is flush with the edge of the front edging portion 72. The rear guide 9 is embedded in the rear end of the shell 1, and the front end of the rear guide 9 and the rear edging portion 73 are clamped to fix the air inlet net 10. The rear guide 9 includes a rear guide surface 91 located on the inner side, and the front end of the rear guide surface 91 is flush with the edge of the rear edging portion 73. The wind converges from the radially shrinking rear guide surface 91 into the shell 1, and the wind pressure, wind force and wind effect are enhanced in the shell 1, and finally expands and flows out from the radially expanding front guide surface 81, and the wind outlet effect is good. The air inlet net 10 is densely covered with a plurality of air inlet micropores (not numbered, the same below). The air inlet micropores can be circular or hexagonal. The aperture of the air inlet micropores is small, which is conducive to isolating dust and impurities and blowing out good air.

[0045] In one embodiment, Figures 2 to 5 As shown, the axial length of the shell 1 is 61 to 65 mm, and the axial length of the shell 1, the front guide 8, and the rear guide 9 when installed is 66 to 70 mm. In other words, the overall axial length is not very long, the overall volume is compact, and it is easy to carry. The axial length of the soft shell 7 is 54.5 to 58.5 mm, and the axial length from the rear end of the outer ring portion 21 to the front end of the contraction member 6 is 43.5 to 47.5 mm. The soft shell 7 can well protect the cylinder 2, the guide member 5, and the contraction member 6. The distance from the rear end of the wheel shell 31 to the rear end of the rear guide 9 is 3.8 to 7.8 mm, and the distance from the front end of the inner shell portion 52 to the front end of the front guide 8 is 14.75 to 18.75 mm, which is conducive to gathering wind and enhancing wind force.

[0046] It should be understood that the "unchanged diameter" and "equal diameters" mentioned in this application allow for a certain error range and do not require complete and exact equality.

[0047] The above detailed description is only an explanation 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, arranged in a housing, wherein the housing has a front side and a rear side, the front side outlets air, and the rear side outlets air, characterized in that: include: A cylinder, wherein a brake assembly is provided in the cylinder, wherein the brake assembly includes a motor and a fan, wherein the motor is used to drive the fan to rotate, and the motor and the fan are arranged in sequence along the front side toward the rear side, and the rear end of the fan exceeds the rear end of the cylinder.

2. The air outlet component according to claim 1, characterized in that: The cylindrical body includes an outer ring portion and an inner ring portion provided in the outer ring portion. The axial length of the inner ring portion is smaller than the axial length of the outer ring portion, and the inner ring portion and the outer ring portion are connected by a first guide vane.

3. The air outlet component according to claim 2, characterized in that: The fan includes a wheel shell and a plurality of blades spaced apart on the outer surface of the wheel shell. The motor is disposed in the inner ring portion and protrudes from the wheel shell. The fan is disposed adjacent to the inner ring portion, and the rear end of the fan exceeds the rear end of the outer ring portion.

4. The air outlet component according to claim 2, characterized in that: The distance between the front end of the wheel shell and the inner ring portion is 0.5 to 3 mm.

5. The air outlet component according to claim 2, characterized in that: The maximum diameter of the wheel shell is equal to the diameter of the inner ring portion, or the difference between the maximum diameter of the wheel shell and the diameter of the inner ring portion is less than 5 mm.

6. The air outlet component according to claim 2, characterized in that: The motor, the fan and the outer ring portion are coaxially arranged.

7. The air outlet component according to claim 3, characterized in that: The wheel shell includes a rear end portion, an enlarged portion that increases radially forward from the rear end portion, and a smooth portion that remains unchanged radially forward from the enlarged portion.

8. The air outlet component according to claim 7, characterized in that: The projection of the enlarged portion in the radial direction falls into the rear end of the outer ring portion.

9. The air outlet component according to claim 7, characterized in that: An axial length of the expanded portion is greater than an axial length of the smooth portion.

10. The air outlet component according to claim 3, characterized in that: The first guide vane includes a first section and a second section extending rearward from the first section. The vane extends in a clockwise spiral, and the second section extends in a counterclockwise spiral.

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