Air outlet component

Abstract

The utility model provides an air outlet component which comprises an outer ring part, an inner ring part, an inner ring part, an outer ring part, an inner ring part, an inner ring part and an outer ring part, and the outer ring part is through in the front-back direction and has the rear-end air inlet and the front-end air outlet. The inner ring part and the outer ring part are coaxially arranged, the inner ring part and the outer ring part are connected through a plurality of guide vanes, and the inner ring part does not extend in the radial direction from back to front; the braking assembly and the outer ring part are coaxially arranged, the braking assembly is installed on the rear side of the inner ring part and contained in the inner side of the outer ring part in the radial direction, the braking assembly comprises fan blades and a motor, the fan blades comprise a wheel shell and a plurality of blades connected to the outer surface of the wheel shell, the blades are arranged at intervals in a surrounding mode, and the motor is arranged on the inner side of the wheel shell in the radial direction; the difference between the maximum diameter of the wheel shell and the diameter of the inner ring part is smaller than 5 mm.

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] At present, the size of daily electronic products is getting smaller and smaller, and the requirements for the size and portability of fans are getting higher and higher. Although the conventional axial flow fan has a large air volume, the wind pressure of the axial flow fan is generally small; although the centrifugal fan overcomes the problem of low wind pressure, the air volume is relatively low. Both fans cannot balance the wind pressure and air volume well, and the air outlet effect is not good. Therefore, it is necessary to provide an improved solution for the fan. Summary of the invention

[0003] In view of this, the present application provides an air outlet component, which has an outer ring portion that passes through the front and back, and an inner ring portion that is coaxially arranged with the outer ring portion, and a spatial layout of a brake assembly, plus a structural design in which the axial change range of the inner wall diameter of the outer ring portion is small, and the maximum diameter of the wheel shell and the diameter of the inner ring portion are slightly different. This can make the air outlet component small and portable while ensuring the air outlet volume and air outlet effect.

[0004] The present application provides an air outlet component, comprising: an outer ring portion, which is through-connected from front to back, with air inlet at the rear end and air outlet at the front end, and the diameter of the inner wall of the outer ring portion changes from back to front by less than 5 mm; an inner ring portion, which is coaxially arranged with the outer ring portion, and the inner ring portion and the outer ring portion are connected by a plurality of guide vanes, and the inner ring portion extends radially unchanged from back to front; a brake assembly, which is coaxially arranged with the outer ring portion, and the brake assembly is installed on the rear side of the inner ring portion and radially accommodated on the inner side of the outer ring portion, and the brake assembly includes a fan blade and a motor, and the fan blade includes a wheel shell, and a plurality of blades connected to the outer surface of the wheel shell, and the plurality of blades are arranged at intervals around, and the motor is arranged on the radial inner side of the wheel shell; wherein the maximum diameter of the wheel shell and the diameter of the inner ring portion differ by less than 5 mm.

[0005] 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 ring portion is 51.76-55.76 mm; the maximum diameter of the wheel shell and the diameter of the inner ring portion are equal, and the maximum diameter of the wheel shell and the diameter of the inner ring portion are both 30.5-34.5 mm.

[0006] 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 blades are nested and fixed on the shaft cylinder; the inner ring portion is formed with a receiving portion on the front side of the base plate, and the receiving portion is used to receive a circuit board and / or a display component; the wheel shell and the inner ring portion are arranged side by side front and back, and the spacing between the front end of the wheel shell and the inner ring portion is 0.5 to 2 mm.

[0007] Furthermore, the rotor assembly includes a rotating shaft, a bearing and a magnetic ring, the rotating shaft and the bearing are inserted and fixed in the shaft cylinder, the stator assembly is arranged on the radial outside of the shaft cylinder, the magnetic ring is arranged 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, and the slope of the enlarged portion continuously decreases from the back to the front. 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 rear end of the stator assembly does not extend backward beyond the rear end of the magnetic ring, the front end of the magnetic ring does not extend forward beyond the front end of the smooth portion, and the rear end of the magnetic ring extends backward beyond the rear end of the smooth portion.

[0010] Furthermore, the axial length of the expanded portion is 20.72 to 24.72 mm, the axial length of the smooth portion is 7.3 to 11.3 mm, and each blade includes a blade root portion connected to the wheel shell, and a blade top portion opposite to the blade root portion, and the blade root portion is arranged on the expanded portion.

[0011] Furthermore, the axial spacing between the rear end of the blade root and the rear end is 4.77 to 6.77 mm, the axial spacing between the front end of the blade root and the rear end of the smooth part is 1.18 to 3.18 mm, and the gap between the blade top and the inner wall of the outer ring part is 0.5 to 4.96 mm.

[0012] Furthermore, taking the front end of the outer ring portion as the origin, the axial distance between the front end of the inner ring portion and the front end of the outer ring portion is -5 to 2 mm; taking the rear end of the outer ring portion as the origin, the axial distance between the rear end of the wheel shell and the rear end of the outer ring portion is -18 to 5 mm.

[0013] 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 spiral direction of the guide vane is opposite to the spiral direction of the blade, and each of the guide vanes includes a first section connected to the inner ring portion, and a second section extending backward from the first section, the radial outer side of the second section is connected to the outer ring portion, the radial inner side of the second section is suspended, and the axial distance between the leading edge portion and the second section is 1 to 8 mm.

[0014] 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 from front to back, and the spatial layout of the inner ring portion and the brake assembly coaxially arranged with the outer ring portion, plus the small axial variation of the inner wall diameter of the outer ring portion, and the structural design in which the maximum diameter of the wheel shell and the diameter of the inner ring portion are slightly different, the air outlet component can be made small and portable while ensuring the air outlet volume and air outlet effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the air outlet component of the present application;

[0016] Figure 2 It is a rear view of the air outlet component of the present application;

[0017] Figure 3 yes Figure 2 A magnified view of part A;

[0018] Figure 4 is a cross-sectional view of the air outlet component of the present application;

[0019] Figure 5 is a schematic diagram of the brake assembly of the present application;

[0020] Figure 6 yes Figure 5 Right view of;

[0021] Figure 7 It is a schematic diagram of the air outlet component of the present application without the brake assembly;

[0022] Figure 8 is a cross-sectional view of the air outlet component of the present application;

[0023] Fig. 9 is a cross-sectional view of an air outlet component according to another embodiment of the present application;

[0024] Fig.10 is a schematic diagram of a brake assembly according to another embodiment of the present application;

[0025] Fig.11It is an exploded view of a brake assembly according to another embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to facilitate a better understanding of the purpose, structure, features, and functions of the present application, the present application is further described in conjunction with the accompanying drawings and specific implementation methods.

[0027] It should be noted that when an element is considered to be “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] 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.

[0029] In the description of the present 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 and are only for the convenience of describing the present 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 the present application.

[0030] In one embodiment, Figure 1 , Figure 2 and Figure 4 As shown, it is a schematic diagram of the air outlet component of the present application. The air outlet component includes a cylinder and a brake assembly. The cylinder includes an outer ring portion 1, an inner ring portion 2, and a plurality of guide vanes 3 connecting the outer ring portion 1 and the inner ring portion 2. The outer ring portion 1 is through-connected from front to back, with air entering at the rear end and air exiting at the front end. The diameter variation of the inner wall of the outer ring portion 1 from back to front is less than 5 mm. The inner ring portion 2 is coaxially arranged with the outer ring portion 1, and the inner ring portion 2 is connected to the outer ring portion 1 through a plurality of guide vanes 3, and the inner ring portion 2 extends radially unchanged from back to front. The brake assembly is coaxially arranged with the outer ring portion 1, and the brake assembly is installed on the rear side of the inner ring portion 2 and is radially accommodated on the inner side of the outer ring portion 1. The brake assembly includes a fan blade 4 and a motor 5. The fan blade 4 includes a wheel shell 41, and a plurality of blades 42 connected to the outer surface of the wheel shell 41. The plurality of blades 42 are arranged around and spaced, and the motor 5 is arranged on the radial inner side of the wheel shell 41. The wheel shell 41 and the inner ring portion 2 are arranged in parallel front and back, and the maximum diameter of the wheel shell 41 and the diameter of the inner ring portion 2 differ by less than 5 mm.

[0031] Through the outer ring part 1 that passes through from front to back, the inner ring part 2 that is coaxially arranged with the outer ring part 1, and the spatial layout of the brake assembly, plus the small axial variation of the inner cavity diameter of the outer ring part 1, the structural design that the maximum diameter of the wheel shell 41 and the diameter of the inner ring part 2 are slightly different, the air outlet component can be made small and portable while ensuring the air volume and air outlet effect. It should be understood that the air outlet component can be used in portable fans such as neck hanging fans, handheld fans, desktop fans, floor fans, etc., without limitation to the examples.

[0032] In one embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the diameter of the inner wall of the outer ring portion 1 remains unchanged from back to front, and the diameter of the inner wall of the outer ring portion 1 is 51.76-55.76 mm. The maximum diameter of the wheel shell 41 is equal to the diameter of the inner ring portion 2, and the maximum diameter of the wheel shell 41 and the diameter of the inner ring portion 2 are both 30.5-34.5 mm. The outer ring portion 1, the inner ring portion 2 and the wheel shell 41 are coaxially arranged, and the inner ring portion 2 and the wheel shell 41 are arranged radially inward of the outer ring portion 1. The diameter of the inner wall of the outer ring portion 1 remains unchanged from front to back, and the maximum diameter of the wheel shell 41 is equal to the diameter of the inner ring portion 2. The air duct is unobstructed from front to back, so the wind generated by the multiple blades 42 can flow out smoothly. Moreover, the diameter of the inner wall of the outer ring portion 1 is 51.76-55.76 mm, the maximum diameter of the wheel shell 41 and the diameter of the inner ring portion 2 are both 30.5-34.5 mm, and there is still 17.26-25.26 mm of circular air duct left, the air duct cross-section is large, and the air outlet effect is good.

[0033] In one embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the ratio of the outer diameter of the inner ring portion 2 to the outer diameter of the outer ring portion 1 is 0.5 to 0.61. It can be seen that within the outer ring portion 1, excluding the inner ring portion 2, nearly half of the air duct remains, the air duct cross-section is large, and the air outlet effect is good.

[0034] In one embodiment, Figure 1 , Figure 2 and Figure 4As shown, a substrate 21 and a hollow shaft cylinder 22 extending backward from the substrate 21 are provided in the inner ring portion 2. The inner ring portion 2 is formed with a receiving portion 23 on the front side of the substrate 21, and the receiving portion 23 is used to receive a circuit board 6 and / or a display component (not shown, the same below). When the receiving portion 23 is provided with the display component, a light-transmitting cover plate may be provided at the front end of the inner ring portion 2 to display the data of the display component to the outside. The data of the display component includes but is not limited to wind speed gear and power. When the switch of the air outlet component is a stepless speed regulation switch, the wind speed gear can correspond to 1 to 100 gears.

[0035] In one embodiment, Figures 4 to 6 As shown, the motor 5 includes a stator assembly 51 and a rotor assembly 52. ​​The stator assembly 51, the rotor assembly 52 and the fan blade 4 are nested and fixed in the shaft cylinder 22. The rotor assembly 52 includes a rotating shaft 521, a bearing 522 and a magnetic ring 523. The rotating shaft 521 and the bearing 522 are inserted and fixed in the shaft cylinder 22, and the bearing 522 is located between the rotating shaft 521 and the shaft cylinder 22. The stator assembly 51 is fixedly arranged on the radial outer side of the shaft cylinder 22, the magnetic ring 523 is arranged on the radial outer side of the stator assembly 51, and the magnetic ring 523 is fixedly arranged on the radial inner side of the wheel shell 41. In other words, the rotating shaft 521, the magnetic ring 523, the shaft cylinder 22, the stator assembly 51, the magnetic ring 523 and the wheel shell 41 are arranged in sequence from the inside to the outside in the radial direction. The structure of the motor 5 in the form of an outer rotor has a reasonable spatial distribution and more stable rotation.

[0036] In one embodiment, Figures 4 to 6 , Fig. 9 and Fig.10 As shown, the ratio of the axial length of the magnetic ring 523 to the axial length of the wheel shell 41 is 0.32 to 0.57. The wheel shell 41 has a longer axial length, and the magnetic ring 523 can be well accommodated inside the wheel shell 41, making reasonable use of the space inside the wheel shell 41. In addition, the wheel shell 41 accommodating the magnetic ring 523 also has a longer boost distance.

[0037] In one embodiment, Figures 4 to 6As shown, the motor 5 is a three-phase motor, which is characterized by having three power lines and providing power through a three-phase power supply. In this embodiment, the stator assembly 51 includes an iron core 511 and a coil 512, and the iron core 511 includes 9 teeth 5111, and the coil 512 is wound around the teeth 5111. The coil 512 has three wires leading out, and the three wires can extend from the through holes passing through the substrate 21 to be electrically connected to the circuit board 6 and / or the display component accommodated in the accommodating portion 23, and the circuit board 6 and / or the display component are electrically connected to the external power supply or the power supply component attached to the air outlet component through the wire, so that the external power supply or the power supply component can provide power to the motor 5. Among them, in this embodiment, the number of magnetic poles of the magnetic ring 523 is 8 poles, and the number of pole pairs is 4 pairs. In other embodiments, the iron core 511 can also include 12 teeth 5111, or 6 teeth 5111.

[0038] In another embodiment, Figures 9 to 11 As shown, the motor 5 is a single-phase motor, which is characterized by having only one power line and one neutral line, and is powered by an AC power supply. In this embodiment, the stator assembly 51 includes an iron core 511 and a coil 512, and the iron core 511 includes four teeth 5111, and the coil 512 is wound around the teeth 5111. The iron core 511 also includes a steel needle 5112, and the steel needle 5112 is used to insert and connect the circuit board 6. The circuit board 6 is arranged on one side of the shaft cylinder, and the steel needle 5112 is inserted forward and fixed to the circuit board 6. The circuit board 6 is then connected to the circuit board 6 and / or the display component accommodated in the accommodating portion 23 through a connecting wire, and the wire is inserted from the depth of the through hole through the substrate 21 to be electrically connected to the circuit board 6 and / or the display component, and the circuit board 6 and / or the display component are electrically connected to the external power supply or the power supply component attached to the air outlet component through the wire, so that the external power supply or the power supply component can provide power to the motor 5. In this embodiment, the magnetic ring has four magnetic poles and two pole pairs.

[0039] In one embodiment, Figure 2 , Figure 4 and Figure 6As shown, the wheel shell 41 includes a rear end 411, an enlarged portion 412 that radially increases from the rear end 411 to the front, and a smooth portion 413 that remains unchanged radially from the enlarged portion 412 to the front, and the slope of the enlarged portion 412 decreases continuously from the back to the front, and the wheel shell 41 as a whole is similar to a bullet head shape. The wheel shell 41 has the enlarged portion 412 that increases radially, so the wind pressure can be increased, and because the slope of the enlarged portion 412 decreases continuously, it is avoided that the wind pressure is too large to generate huge noise. A plurality of blades 42 are connected to the outer surface of the enlarged portion 412 to expand the air inlet surface, enhance the air suction capacity, and increase the air intake volume. In addition, the enlarged portion 412 guides the airflow to increase the pressure, and the smooth portion 413 smoothly guides the airflow after the pressure increase forward, so that the wind pressure is increased and the flow is smooth. The smooth portion 413 remains unchanged radially, and the strong wind formed by the pressure increase is blown out smoothly. The wheel shell 41 also includes a fixing column 425 located at the inner center, and the fixing column 425 is used to fix the rotating shaft 521.

[0040] In one embodiment, Figure 4 , Figure 6 and Fig. 9 As shown, the rear end of the stator assembly 51 does not extend backward beyond the rear end of the magnetic ring 523, the front end of the magnetic ring 523 does not extend forward beyond the front end of the smooth portion 413, and the rear end of the magnetic ring 523 extends backward beyond the rear end of the smooth portion 413. In this embodiment, the magnetic ring 523 is completely disposed on the inner side of the wheel shell 41, and the front edge of the magnetic ring 523 is flush with the front edge of the wheel shell 41. The stator assembly 51 and the magnetic ring 523 are accommodated on the radial inner side of the smooth portion 413 and the radial inner side of a portion of the enlarged portion 412, so as to reasonably utilize the internal space of the wheel shell 41. In addition, as Figure 5 As shown, the inner wall of the wheel shell 41 can be provided with multiple ribs (not marked, the same below) at intervals, and the magnetic ring 523 is fixed against the radial inner side of the multiple ribs. The multiple ribs can reduce the error and better press the magnetic ring 523. In addition, dynamic balancing materials can be provided between the multiple ribs or between adjacent ribs to ensure the dynamic balance of the fan blade 4 as a whole. Of course, as Fig.10 The ribs may not be provided on the inner wall of the wheel housing 41. It should be understood that in other embodiments, a housing may be provided between the magnetic ring 523 and the wheel housing 41 to ensure the strength of the structure.

[0041] In one embodiment, Figure 4 , Figure 6 and Fig. 9As shown, the axial length of the wheel shell 41 is 28.03-36.03 mm, the axial length of the enlarged portion 412 is 20.72-24.72 mm, and the axial length of the smooth portion 413 is 7.3-11.3 mm. The long axial length of the enlarged portion 412 is conducive to enhancing the wind pressure. The axial length of the smooth portion 413 is relatively short, which is conducive to shortening the overall axial length of the air outlet component.

[0042] In one embodiment, Figure 4 , Figure 6 and Fig. 9 As shown, the diameter of the rear end portion 411 is 6.37-12.71 mm, the diameter of the smooth portion 413 is 30.5-34.5 mm, and the diameter of the expanded portion 412 is 6.37-30.5 mm. From the rear end portion 411 with a smaller diameter, the diameter of the expanded portion 412 with a longer axial length changes, and then transitions to the smooth portion 413 with a larger diameter, the airflow flows smoothly and is pressurized, and the potential energy is enhanced.

[0043] In one embodiment, Figure 2 , Figure 4 , Figure 6 , Figure 8 and Fig. 9 As shown, each blade 42 includes a blade root 421 connected to the wheel shell 41, a blade top 422 opposite to the blade root 421, a leading edge 423 connecting the blade root 421 and the blade top 422, and a trailing edge 424 connecting the blade root 421 and the blade top 422, and the leading edge 423 and the trailing edge 424 are arranged opposite to each other. The leading edge 423 is shorter than the trailing edge 424, and the length of the leading edge is 8.18 to 12.18 mm, and the length of the trailing edge is 13.55 to 17.55 mm. In conjunction with the radially enlarged expansion portion 412, this is conducive to maintaining the uniform height of the blade top 422 in the radial direction, thereby ensuring the stable enhancement of wind pressure.

[0044] The blade root 421 extends clockwise from the back to the front, and the blade top 422 extends clockwise from the back to the front, and in the same blade 42, the projection of the blade root 421 on the wheel shell 41 intersects with the projection of the blade top 422 on the wheel shell. It can be seen that although the blade top 422 and the blade root 421 both extend clockwise, the blade top 422 has a deflection angle relative to the blade root 421, that is, the blade 42 has been twisted, and the air suction and air delivery capabilities are stronger.

[0045] The blade root 421 is arranged at the enlarged portion 412, and the axial spacing between the rear end of the blade root 421 and the rear end portion 411 is 4.77-6.77 mm, and the axial spacing between the front end of the blade root 421 and the rear end of the smooth portion 413 is 1.18-3.18 mm. It can be seen that the blade root 421 is arranged at a position of the enlarged portion 412 close to the smooth portion 413, and the rear end of the enlarged portion 412 guides and increases pressure, and then cuts through the blade 42 to form a strong wind and then sprays forward from the smooth portion 413.

[0046] In one embodiment, Figure 2 and Figure 3 As shown, from an axial perspective, the axial projections of the multiple blade tops 422 of the multiple blades 42 are on the same circle, and the diameter of the circle where the axial projection of the blade top 422 is located is 50.8-54.8 mm. The axial projections of the multiple blade tops 422 and the axial projection of the outer ring portion 1 are concentric circles. The gap between the blade top 422 and the inner wall of the outer ring portion 1 is 0.96-4.96 mm, the blade 42 has a good air suction effect, and the blade 42 and the outer ring portion 1 have a further pressurization effect on the airflow, and the air discharge effect is better.

[0047] like Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, in this embodiment, two adjacent blades 42 overlap at least partially in the axial direction, and in the radial direction from the inside to the outside, the adjacent blades 42 change from the overlapping state to the interval state, and the interval gradually increases. The overlapping parts of the blades 42 can provide greater suction for the fan blade 4, and the interval can reduce the pressure difference between the front and rear of the blade 42 and avoid whistling noise. The angle between the connecting line of the front and rear ends of the blade root 421 and the axial direction is 30 to 80 degrees. While ensuring that a large wind speed can be provided, the air can also be sheared at a small angle, so that the wind noise can be effectively reduced. The angle between the connecting line of the front and rear ends of the blade root 421 and the connecting line of the front and rear ends of the blade top 422 is 5 to 25 degrees. This arrangement allows the blade 42 to perform a small angle shearing of the air, making the delivered wind force more uniform and soft, and the mute effect is better. It should be understood that the angle between the projection of the blade root 421 on the enlarged portion 412 and the projection of the blade top 422 on the enlarged portion 412 should not be too large, otherwise the wind resistance will increase, which is not conducive to the rotation of the fan blade 4. Of course, it should not be too small, otherwise the above-mentioned effect will not be achieved.

[0048] In one embodiment, Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, from the back to the front, the blade 42 extends in a clockwise spiral, and from the back to the front, the guide vane 3 first extends in a counterclockwise spiral and then extends straight forward. The spiral direction of the rear part of the guide vane 3 is opposite to the spiral direction of the blade 42. Under the action of the expansion part 412 and the blade 42, the airflow is pressurized to form turbulence, and then combed by the smoothing part 413 and the guide vane 3 with the opposite spiral direction, so that the air flows smoothly forward.

[0049] In one embodiment, Figure 1 , Figure 4 , Figure 7 , Figure 8 and Fig. 9 As shown, each of the guide vanes 3 includes a first section 31 connected to the inner ring portion 2, and a second section 32 extending backward from the first section 31. The radial outer side of the second section 32 is connected to the outer ring portion 1, the radial inner side of the second section 32 is suspended, and is spaced apart from the smooth portion 413, and the axial distance between the leading edge portion 423 and the second section 32 is 1 to 8 mm. The wheel shell 41 and the inner ring portion 2 are arranged in parallel front and back, the diameter of the smooth portion 413 is equal to the diameter of the inner ring portion 2, and the spacing between the smooth portion 413 and the inner ring portion 2 is 0.5 to 2 mm, that is, the spacing between the wheel shell 41 and the inner ring portion 2 is 0.5 to 2 mm, thereby forming a smooth inner core; at the same time, the axial distance between the leading edge portion 423 and the second section 32 is 1 to 8 mm, and the airflow generated by the blade 42 can also be quickly transmitted to the guide vane 3, avoiding the occurrence of backflow and wind blocking, and the noise reduction effect is obvious.

[0050] Preferably, the axial distance between the blade 42 and the guide vane 3 is 1.5 to 3.5 mm, that is, the axial distance between the leading edge 423 and the second section 32 is 1.5 to 3.5 mm. The guide vane 3 has the function of rectifying and guiding, and by setting the axial distance between the blade 42 and the guide vane 3, the smooth transition of the airflow between the blade 42 and the guide vane is ensured, turbulence is reduced, and noise is reduced. The diameter of the fan blade 4 is 50.8 to 54.8 mm, and the ratio of the axial distance between the blade 42 and the guide vane 3 to the diameter of the fan blade 4 is 0.027 to 0.069. It can be seen that the axial distance between the blade 42 and the guide vane 3 is short enough relative to the diameter of the fan blade 4, the flow path is well connected, the airflow consumption is small, and it can flow forward smoothly.

[0051] In addition, the second section 32 adjacent to the front edge portion 423 extends counterclockwise from back to front, and the first section 31 at the front end first extends counterclockwise and then extends straight forward. After the second section 32 combs the airflow generated by the blade 42, the first section 31 guides the combed airflow to blow straight forward, providing the user with a better blowing experience.

[0052] In one embodiment, Figure 2 , Figure 5 and Fig.10 As shown, the number of the blades 42 is 9, and the number of the guide vanes 3 is 7. The number of the blades 42 is an odd number, which is beneficial to the overall dynamic balance design of the fan blade 4, and the difference between the number of the guide vanes 3 and the number of the blades 42 is small, which is beneficial to the guide vanes 3 to better comb the strong airflow generated by the blades 42. Of course, in other embodiments, the number of the blades 42 and the guide vanes 3 can be other numbers, for example, the number of the blades 42 can be 9-15.

[0053] In some embodiments, the inner ring portion 2 and the outer ring portion 1 are coaxially arranged, and the inner ring portion 2 and the outer ring portion 1 are both cylindrical, the front end of the inner ring portion 2 is flush with the front end of the outer ring portion 1, or the front end of the inner ring portion 2 exceeds the front end of the outer ring portion 1 forward, and the rear end of the outer ring portion 1 exceeds the rear end of the inner ring portion 2 backward. Taking the front end of the outer ring portion 1 as the origin, the axial distance between the front end of the inner ring portion 2 and the front end of the outer ring portion 1 is -5 to 2 mm. In other words, it is the range from the front end of the inner ring portion 2 protruding forward by 5 mm relative to the front end of the outer ring portion 1 to the front end of the inner ring portion 2 being concave backward by 2 mm relative to the front end of the outer ring portion 1. Taking the rear end of the outer ring portion 1 as the origin, the axial distance between the rear end of the wheel shell 41 and the rear end of the outer ring portion 1 is -18 to 5 mm. In other words, the rear end of the wheel shell 41 is concave forward by 18 mm relative to the rear end of the outer ring portion 1, and the rear end of the wheel shell 41 is convex backward by 5 mm relative to the rear end of the outer ring portion 1. Preferably, in one embodiment, the front end of the inner ring portion 2 is flush with the front end of the outer ring portion 1, and the rear end of the wheel shell 41 is concave forward relative to the rear end of the outer ring portion 1. In this way, an air intake space can be formed between the rear end of the wheel shell 41 and the rear end of the outer ring portion 1, further reducing noise. It should be understood that the rear end of the wheel shell 41 is the rear end portion 411.

[0054] In one embodiment, the rear end of the wheel shell 41 extends backward beyond the rear end of the outer ring portion 1, but the plurality of blades 42 are accommodated inside the outer ring portion 1, and the gap between the blades 42 and the outer ring portion 1 is 0.96-4.96 mm. The rear end of the wheel shell 41 absorbs wind and guides flow, and the blades 42 and the outer ring portion 1 pressurize the airflow to enhance wind energy.

[0055] 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 creation are included in the patent scope of this creation.

Claims

1. An air outlet component, characterized in that: include: The outer ring portion is through-connected from front to back, with air entering from the rear end and exiting from the front end, and the diameter variation of the inner wall of the outer ring portion from the rear to the front is less than 5 mm; An inner ring portion is coaxially arranged with the outer ring portion, the inner ring portion and the outer ring portion are connected via a plurality of guide vanes, and the inner ring portion extends radially from rear to front without changing; A brake assembly is coaxially arranged with the outer ring portion, the brake assembly is installed at the rear side of the inner ring portion and is radially received inside the outer ring portion, the brake assembly comprises a fan blade and a motor, the fan blade comprises a wheel shell and a plurality of blades connected to the outer surface of the wheel shell, the plurality of blades are arranged at intervals around, and the motor is arranged at the radial inner side of the wheel shell; Wherein, the maximum diameter of the wheel shell and the diameter of the inner ring portion differ by less than 5 mm.

2. The air outlet component according to claim 1, characterized in that: 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 ring portion is 51.76-55.76 mm; the maximum diameter of the wheel shell and the diameter of the inner ring portion are equal, and the maximum diameter of the wheel shell and the diameter of the inner ring portion are both 30.5-34.5 mm.

3. The air outlet component according to claim 1, characterized in that: The inner ring portion is provided with a base plate and a hollow shaft cylinder extending backward from the base plate. The motor includes a stator assembly and a rotor assembly. The stator assembly, the rotor assembly and the fan blades are nested and fixed on the shaft cylinder. The inner ring portion is formed with a receiving portion on the front side of the base plate, and the receiving portion is used to receive a circuit board and / or a display component. The wheel shell and the inner ring portion are arranged side by side front and back, and the spacing between the front end of the wheel shell and the inner ring portion is 0.5 to 2 mm.

4. The air outlet component according to claim 3, characterized in that: The rotor assembly includes a rotating shaft, a bearing and a magnetic ring. The rotating shaft and the bearing are inserted and fixed in the shaft cylinder. The stator assembly is arranged on the radial outer side of the shaft cylinder. The magnetic ring is arranged on the radial outer side of the stator assembly, and the magnetic ring is fixed on the radial inner side of the wheel shell.

5. The air outlet component according to claim 4, characterized in that: 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, and the slope of the enlarged portion decreases continuously from the back to the front. The wheel shell also includes a fixing column located at the inner center, and the fixing column is used to fix the rotating shaft.

6. The air outlet component according to claim 5, characterized in that: The rear end of the stator assembly does not extend backward beyond the rear end of the magnetic ring, the front end of the magnetic ring does not extend forward beyond the front end of the smooth portion, and the rear end of the magnetic ring extends backward beyond the rear end of the smooth portion.

7. The air outlet component according to claim 6, characterized in that: The axial length of the expanded portion is 20.72 to 24.72 mm, the axial length of the smooth portion is 7.3 to 11.3 mm, and each blade includes a blade root portion connected to the wheel shell and a blade top portion opposite to the blade root portion, and the blade root portion is arranged on the expanded portion.

8. The air outlet component according to claim 7, characterized in that: The axial spacing between the rear end of the blade root and the rear end is 4.77 to 6.77 mm, the axial spacing between the front end of the blade root and the rear end of the smooth part is 1.18 to 3.18 mm, and the gap between the blade top and the inner wall of the outer ring part is 0.5 to 4.96 mm.

9. The air outlet component according to claim 1, characterized in that: Taking the front end of the outer ring portion as the origin, the axial distance between the front end of the inner ring portion and the front end of the outer ring portion is -5 to 2 mm; taking the rear end of the outer ring portion as the origin, the axial distance between the rear end of the wheel shell and the rear end of the outer ring portion is -18 to 5 mm.

10. The air outlet component according to claim 1, characterized in that: 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, the leading edge portion and the trailing edge portion are arranged opposite to each other; the spiral direction of the guide vane is opposite to the spiral direction of the blade, each of the guide vanes includes a first section connected to the inner ring portion, and a second section extending backward from the first section, the radial outer side of the second section is connected to the outer ring portion, the radial inner side of the second section is suspended, and the axial distance between the leading edge portion and the second section is 1 to 8 mm.

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