Air outlet piece and portable fan

Abstract

The utility model provides an air outlet piece which comprises a shell, a rear side air inlet part and a front side air outlet part. The motor assembly is fixed on the cylinder body; the fan assembly is fixed to the barrel and the motor assembly, and at least part of the fan assembly is contained in the barrel; the blowing nozzle is fixed at the front end of the shell; wherein a first magnetic attraction part is arranged at the front end of the shell, the blowing nozzle is provided with a second magnetic attraction part corresponding to the first magnetic attraction part, and the shell and the blowing nozzle are fixedly connected through magnetic attraction of the first magnetic attraction part and the second magnetic attraction part. The blowing nozzle and the shell can be automatically adsorbed and fixed only by lightly aligning the blowing nozzle to the air outlet of the shell, complicated screwing or buckling operation like a traditional buckling type blowing nozzle is not needed, and installation can be completed within several seconds. And during disassembly, the blowing nozzle can be taken down only by slightly pulling, so that the blowing nozzle can be conveniently and quickly replaced by a user according to different modeling requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fans, in particular to a fan with a nozzle. BACKGROUND

[0002] In the prior art, a portable fan generally includes an air outlet, and the air outlet size is fixed, so the air outlet area is also fixed. Moreover, as a small fan with small volume and convenient to carry, the portable fan can only be used for blowing and cooling for users, and the function is single. Therefore, how to enrich the use scenarios and functions of the portable fan without affecting the air outlet capacity is a problem to be solved at present. SUMMARY

[0003] In view of this, the present application provides an air outlet, which changes the air outlet area by magnetically fixing a nozzle at the front end of the shell, thereby enriching the function of the air outlet.

[0004] The present application provides an air outlet, comprising: a shell, a rear side air inlet, a front side air outlet, a cylinder fixed in the shell; a motor assembly fixed to the cylinder; a fan assembly fixed to the cylinder and the motor assembly, and at least partially accommodated in the cylinder; a nozzle fixed to the front end of the shell; wherein the front end of the shell is provided with a first magnetic attraction piece, the nozzle is provided with a second magnetic attraction piece corresponding to the first magnetic attraction piece, and the shell and the nozzle are magnetically fixed and connected through the first magnetic attraction piece and the second magnetic attraction piece.

[0005] Further, it further includes a flow guide, the flow guide includes a first inner ring part and a first outer ring part, a plurality of first connecting leaves connect the first inner ring part and the first outer ring part, and the first outer ring part is fixed to the front end of the shell.

[0006] Further, the outer side of the first outer ring part is formed with a fixing part, and the first magnetic attraction piece is fixed to the fixing part; the fixing part and the radial inner side of the front end of the shell jointly form a groove, and the first magnetic attraction piece is accommodated in the groove.

[0007] Further, at least one of the first magnetic attraction piece and the second magnetic attraction piece is annular, and at least one of the first magnetic attraction piece and the second magnetic attraction piece is a magnet.

[0008] Further, the material of the magnet in the first magnetic attraction piece and the second magnetic attraction piece is neodymium iron boron strong magnet.

[0009] Further, the first magnetic attraction piece protrudes forward from the front end of the shell and the first outer ring part, the second magnetic attraction piece is fixed to the rear side of the nozzle, and the inner diameter of the rear end of the nozzle matches the outer diameter of the first magnetic attraction piece.

[0010] Further, the first outer ring part is provided with a first flow guide surface on the radially inner side, at least part of the first flow guide surface radially increases from back to front, the first inner ring part is provided with a second flow guide surface on the radially outer side, at least part of the second flow guide surface radially decreases from back to front, and the front end of the first flow guide surface exceeds the front end of the second flow guide surface in front.

[0011] Further, the blowing nozzle radially decreases from back to front, the front end of the blowing nozzle is oval, and the front end of the blowing nozzle is fixed with the bristles.

[0012] Further, the blowing nozzle radially decreases from back to front, the inner diameter of the rear end of the blowing nozzle is 23-40 mm, the front end of the blowing nozzle is circular, and the diameter of the front end of the blowing nozzle is 14-18 mm.

[0013] The application also provides a portable fan, which comprises the air outlet piece as described above, and further comprises a hand-held part, wherein a rechargeable battery is arranged in the hand-held part, and the rechargeable battery drives the motor assembly

[0014] Compared with the prior art, the air outlet piece and the portable fan have the following beneficial effects: only need to lightly aim the blowing nozzle at the air outlet of the shell, and the two can be automatically adsorbed and fixed, without the complicated screwing or buckling operation as in the traditional buckle type blowing nozzle, and the installation can be completed in a few seconds. When disassembling, only need to lightly pull, and the blowing nozzle can be removed, which is convenient for users to quickly replace the blowing nozzle according to different modeling requirements. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the portable fan of the application;

[0016] Figure 2 is a schematic view of the portable fan of the application without the blowing nozzle and the first magnetic adsorption piece;

[0017] Figure 3 is a partial exploded view of the portable fan of the application;

[0018] Figure 4 is a cross-sectional view of the portable fan of the application from one angle;

[0019] Figure 5 is a cross-sectional view of the portable fan of the application from another angle;

[0020] Figure 6 is an exploded view of the air inlet assembly part of the portable fan of the application;

[0021] Figure 7 is a perspective view of the flow guide piece of the application;

[0022] Figure 8 is a perspective view of the second sound absorption assembly of the application;

[0023] Figure 9 is a sectional view of the barrel, motor assembly and fan assembly of the present application;

[0024] Figure 10 is a perspective view of the switch assembly of the present application;

[0025] Figure 11 is a perspective view of the portable fan of the present application with another blowing nozzle. DETAILED DESCRIPTION

[0026] For the purpose of better understanding the object, structure, features and effects of the present application, the present application will be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can exist at the same time.

[0028] In the present application, the description such as "first", "second" and the like is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying 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", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] As shown in FIG. 1, it is a schematic view of the portable fan of the present application. In the present embodiment, the portable fan is a handheld fan, and the portable fan comprises a blowing member 100 and a handheld part 200 connected together. The blowing member 100 comprises an outer shell 1, a barrel 2, a motor assembly 3 and a fan assembly 4. The outer shell 1 is air-in at the back side and air-out at the front side, and the barrel 2 is fixed in the outer shell 1. The motor assembly 3 is fixed to the barrel 2, the fan assembly 4 is fixed to the barrel 2 and the motor assembly 3, and at least partially accommodated in the barrel 2. Figures 1 to 4 As shown in FIG. 2, it is a sectional view of the barrel, motor assembly and fan assembly of the present application. In the present embodiment, the portable fan is a handheld fan, and the portable fan comprises a blowing member 100 and a handheld part 200 connected together. The blowing member 100 comprises an outer shell 1, a barrel 2, a motor assembly 3 and a fan assembly 4. The outer shell 1 is air-in at the back side and air-out at the front side, and the barrel 2 is fixed in the outer shell 1. The motor assembly 3 is fixed to the barrel 2, the fan assembly 4 is fixed to the barrel 2 and the motor assembly 3, and at least partially accommodated in the barrel 2.

[0031] Figures 1 to 4 ​As shown, in one embodiment, the air outlet piece 100 further comprises a nozzle 5. The nozzle 5 is fixed to the front end of the shell 1, and the front end of the shell 1 is provided with a first magnetic attraction member 11. The nozzle 5 is provided with a second magnetic attraction member 51 corresponding to the first magnetic attraction member 11, and the shell 1 and the nozzle 5 are magnetically attracted and fixed through the first magnetic attraction member 11 and the second magnetic attraction member 51. The shell 1 cooperates with the nozzle 5, so that different blowing functions can be achieved through different specifications of the nozzle 5.

[0032] Compared with the existing buckle fixing or screw fixing connection mode, the magnetic attraction connection mode only needs to align the nozzle 5 with the air outlet 13 of the shell 1, and the two can be automatically attracted and fixed. Unlike the traditional buckle type nozzle 5, no complex screwing or buckling operation is required, and the installation can be completed in a few seconds. When disassembling, the nozzle 5 can be removed by gently pulling it, which facilitates users to quickly replace the nozzle 5 according to different styling needs. In addition, the nozzle 5 fixed by magnetic attraction is more firmly connected with the shell 1 due to the magnetic attraction effect, and is not easy to fall off during use. Even when the air outlet piece 100 is waved or moved quickly, the nozzle 5 can remain stable, avoiding the situation that the traditional nozzle 5 is worn, loose or even falls off due to frequent replacement or long use time, thereby improving the safety of use and reducing the adverse effects on equipment or other effects caused by the falling of the nozzle 5. The magnetic component also has strong anti-magnetic force decay ability, which ensures that the nozzle 5 can still maintain good adsorption effect after being installed and disassembled for many times, prolonging the service life of the nozzle 5. In addition, a series of different nozzles 5 can be provided to achieve different functions according to actual needs, for example, the nozzle 5 for blowing dust, the nozzle 5 for styling design, without limitation by way of example. Moreover, due to the detachable design of the magnetic nozzle 5, it is convenient for users to clean it individually, which helps to maintain the cleanliness and good performance of the air outlet piece 100.

[0033] As Figure 3 , Figure 4 , Figure 5 and Figure 7As shown in the figure, in one embodiment, the portable fan comprises a flow guide 6, which comprises a first inner ring part 62 and a first outer ring part 61. A plurality of first connecting leaves 63 connects the first inner ring part 62 and the first outer ring part 61, and the first outer ring part 61 is fixed to the front end of the outer shell 1. The outer side of the first outer ring part 61 is formed with a fixed part 64, and the first magnetic attraction part 11 is fixed to the fixed part 64. In this embodiment, the first magnetic attraction part 11 is fixed to the fixed part 64 by screw fixing, and in other embodiments, other fixing methods can also be used. The fixed part 64 and the radially inner side of the front end of the outer shell 1 together form a groove 65, and the first magnetic attraction part 11 is accommodated in the groove 65. By forming the groove 65, the first magnetic attraction part 11 can also be limited between the outer shell 1 and the flow guide 6, the axial movement of the first magnetic attraction part 11 is limited by the fixed part 64, and the radial movement of the first magnetic attraction part 11 is limited by the groove 65 wall, so as to realize the stable fixing of the first magnetic attraction part 11.

[0034] As shown in the figure, Figure 3 , Figure 5 and Figure 7 In one embodiment, at least one of the first magnetic attraction part 11 and the second magnetic attraction part 51 is annular, and at least one of the first magnetic attraction part 11 and the second magnetic attraction part 51 is a magnet. The annular magnet can generate a very uniform magnetic field, and the magnetic field strength is consistent on the entire exposed annular magnet surface. And the magnetic flux path of the annular magnet is closed, the magnetic field is closed, and the magnetic flux almost does not leak out of the magnet, thereby improving the utilization rate of the magnetic field, enhancing the magnetic attraction force, and also reducing the magnetic interference to the surrounding environment. In this embodiment, the material of the first magnetic attraction part 11 is iron, and the material of the second magnetic attraction part 51 is a magnet. In other embodiments, the material of the first magnetic attraction part 11 can be a magnet, and the material of the second magnetic attraction part 51 can be iron; or the materials of the first magnetic attraction part 11 and the second magnetic attraction part 51 can both be magnets.

[0035] Generally speaking, under the same conditions, the attraction of the magnet to the iron is smaller than the attraction of the magnet to the magnet, because the iron is not a permanent magnet, and the magnetic domains inside the iron will partially or completely align with the magnetic field of the magnet under the action of the magnetic field of the magnet, thereby generating an attractive force, but this attractive force is not as large as the attractive force generated by the alignment of the opposite poles of the magnet to the magnet. However, when the magnet attracts the iron, the attraction is relatively stable and does not fluctuate greatly due to the alignment of the magnetic poles as when the magnet attracts the magnet. As long as the ferrous object is within the magnetic field range of the magnet, the magnet will generate a certain attractive force, and the attractive force changes relatively smoothly within a certain distance range. When the magnetic poles of the magnet are not completely aligned, the attractive force will be greatly reduced. However, when the opposite poles of the two magnets are close to each other and completely aligned, the attractive force between them is very strong. In this case, the magnetic domains inside the magnet are aligned in the same direction, which can generate the maximum magnetic flux, thereby generating a strong attractive force.

[0036] In the present embodiment, at least one of the first magnetic attraction member 11 and the second magnetic attraction member 51 is a magnet, wherein the material of the magnet is a neodymium-iron-boron strong magnet. Neodymium-iron-boron (Nd-Fe-B) permanent magnet material is currently the highest magnetic permanent magnet material, and the main raw materials include rare earth metal neodymium, metal element iron, non-metallic element boron, and a small amount of dysprosium, niobium, copper and other elements. Further, the material of the magnet is N52 neodymium-iron-boron strong magnet, which is a high-performance rare earth magnet with a maximum magnetic energy product of 52 MGOe (Mega Gauss-Oersted). This means that it can generate a very strong magnetic force. It is light in weight but strong in magnetic force, and can meet the design requirements of miniaturization and light weight. In addition, N52 neodymium-iron-boron strong magnet also has high remanence, high coercivity, working temperature range up to 80-100 degrees Celsius, corrosion resistance and other excellent properties, so it has a wide range of applications in many fields. It is one of the strongest magnets on the market. Of course, in other embodiments, the material of the magnet can also be other neodymium-iron-boron strong magnets or other magnetic materials.

[0037] As Figure 2 , Figure 4 , Figure 5 and Figure 7As shown, in one embodiment, the first magnetic member 11 protrudes forward from the outer shell 1 and the first outer ring portion 61, and the second magnetic member 51 is fixed to the rear side of the nozzle 5, and the inner diameter of the rear end of the nozzle 5 matches the outer diameter of the first magnetic member 11. Since the first magnetic member 11 protrudes forward from the front end of the first outer ring portion 61 and the front end of the outer shell 1, the first magnetic member 11 can normally magnetically attract the second magnetic member 51. Since the inner diameter of the rear end of the nozzle 5 matches the outer diameter of the first magnetic member 11, the rear end of the nozzle 5 can cover part or all of the outer side of the first magnetic member 11, making it more aesthetically pleasing. It should be understood that the first magnetic member 11 and the second magnetic member 51 can directly contact and magnetically attract each other, or can be spaced apart by a plastic shell wall or other element to indirectly magnetically attract each other, as long as the magnetic connection between the first magnetic member 11 and the second magnetic member 51 is not affected.

[0038] As shown in Figure 1 , Figure 3 and Figure 4 , the nozzle 5 includes a first nozzle 5a, which is radially reduced from rear to front, and the front end of the first nozzle 5a is oval-shaped, and a bristle 52 is fixed to the front end of the first nozzle 5a, and the bristle 52 is arranged side by side with the blowing port of the first nozzle 5a. The first nozzle 5a has a dust blowing function, and the bristle 52 can further remove dust. Of course, the bristle 52 can also be directly arranged at the blowing port of the first nozzle 5a, and the wind blows out from the gap between the bristles 52. The axial length of the first nozzle 5a is 31-35.9mm, and the axial length of the first nozzle 5a is relatively short, reducing wind loss and improving blowing efficiency.

[0039] As shown in Figure 11 , the nozzle 5 includes a second nozzle 5b, which is radially reduced from rear to front, and the inner diameter of the rear end of the second nozzle 5b is 23-40mm, and the front end of the second nozzle 5b is circular-shaped, and the inner diameter of the front end of the second nozzle 5b is 14-18mm, so it can be seen that the second nozzle 5b has a strong wind gathering function. Moreover, the axial length of the second nozzle 5b is 60-64.7mm, and the axial length of the second nozzle 5b is relatively long, and the wind pressure and blowing distance are further improved.

[0040] As shown in Figure 2 , Figure 4 and Figure 5As shown, in one embodiment, the housing 1 is formed with an air inlet cavity 14 at the rear end of the fan assembly 4, and an air inlet assembly is detachably mounted at the rear end of the air inlet cavity 14. The air inlet assembly is detachably mounted at the rear end, so as to facilitate user cleaning and maintenance, and the user can detach the air inlet assembly for certain personalized customization operation. The detachable air inlet assembly can also be better fixed in design, reducing the risk of loosening and falling off due to vibration and other reasons during use. The air inlet assembly includes a first sound-absorbing assembly 7 and a rear cover assembly 9. The first sound-absorbing assembly 7 includes a first support 71 and a first sound-absorbing piece 72. The first sound-absorbing assembly 7 is arranged at the inner rear side of the housing 1, and the first sound-absorbing piece 72 is arranged between the first support 71 and the housing 1 in the radial direction. The first support 71 and the housing 1 are hard elements, which can better play a supporting and shaping role. Therefore, arranging the first sound-absorbing piece 72 between the first support 71 and the housing 1 can be more secure and stable.

[0041] In this embodiment, the material of the first sound-absorbing piece 72 is metal material. Metal material has good sound insulation and sound absorption performance, which can effectively reduce the propagation and reflection of sound. In other embodiments, the material of the first sound-absorbing piece 72 can be organic fiber material, inorganic fiber material, cotton, foamed plastic, sponge, perforated plate, leather, rubber, plastic, etc.

[0042] As shown in FIG. 1, the first sound-absorbing piece 72 is arranged between the first support 71 and the housing 1 in the radial direction. The first support 71 and the housing 1 are hard elements, which can better play a supporting and shaping role. Therefore, arranging the first sound-absorbing piece 72 between the first support 71 and the housing 1 can be more secure and stable. Figure 2 、 Figure 4 、 Figure 5 and Figure 6As shown in the drawings, in one embodiment, a plurality of first sound-absorbing holes 711 are formed through the first support 71, a plurality of first micro-holes (not shown, the same below) are formed on the first sound-absorbing member 72, and a plurality of side air inlets 121 are formed through the shell 1 corresponding to the first support 71. The first support 71, the first sound-absorbing member 72, and the shell 1 corresponding to the position of the first support 71 are all provided with through holes. However, the first sound-absorbing holes 711 and the first micro-holes are arranged in a staggered manner, the first micro-holes and the side air inlets 121 are arranged in a staggered manner, and the first sound-absorbing holes 711 and the side air inlets 121 are arranged in a staggered manner. It should be understood that the staggered arrangement not only refers to the misalignment of positions, but also refers to the staggered arrangement caused by the different sizes of the apertures of the first sound-absorbing holes 711, the first micro-holes, and the side air inlets 121. The first sound-absorbing holes 711, the first micro-holes, and the side air inlets 121 are all arranged in a staggered manner, which can effectively prevent dust, impurities, hair, and the like from entering the air inlet cavity 14. In addition, when the portable fan is started, air flows at a high speed, and the staggered arrangement of the air inlet structure can avoid the strong impact of high-speed fluid, increase the stability of the structure, guide the high-speed fluid to tilt in, increase the total area of the air inlet in a limited space, and further improve the air intake; the staggered arrangement also helps to make the entering air more evenly distributed in the air inlet cavity 14, avoids the occurrence of local airflow that is too strong or too weak, realizes more accurate airflow control, reduces turbulence, reduces energy loss, and makes the air flow more stable.

[0043] As shown in the drawings, Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown in the drawings, in one embodiment, the rear side of the first support 71 is provided with a mounting portion 712, and the rear cover assembly 9 is mounted on the mounting portion 712. The rear cover assembly 9 includes a rear frame 91, the rear frame 91 and the first support 71 sandwiching the air inlet net 15, the rear frame 91 corresponding to the air inlet net 15 is provided with a rear air inlet 122, and the air inlet net 15 is provided with a plurality of second micro-holes (not shown, the same below), and the aperture of the second micro-holes is 0.225-1mm. The second micro-holes have small apertures, good filtering effect, good safety performance, low airflow speed, and uniform airflow distribution, and good airflow stability. The air inlet 12 includes the side air inlets 121 and the rear air inlets 122, adopts air inlet channels in two directions of the rear and the side, provides multi-angle air inlets, thereby forming a three-dimensional and large-air-volume air inlet mode, so that the portable fan can obtain stable and large air volume. The axial length of the side air inlets 121 accounts for 1 / 4-2 / 3 of the axial length of the shell 1, preferably 1 / 3-1 / 2, thereby ensuring sufficient air inlet area and ensuring the final air outlet effect.

[0044] AsFigures 4 to 6 As shown in the drawings, in one embodiment, the first sound-absorbing member 72 is fixed to the rear frame 91, and the housing 1 and the first sound-absorbing member 72 have a space therebetween, and the first sound-absorbing member 72 and the first support 71 have a space therebetween. Through the fixing effect of the rear frame 91, the housing 1, the first sound-absorbing member 72 and the first support 71 are formed with spaces therebetween, thereby forming the side air inlet 121, the space between the housing 1 and the first sound-absorbing member 72, the first micro-hole, the space between the first sound-absorbing member 72 and the first support 71, and the air flow passage of the first sound-absorbing hole 711. Of course, in other embodiments, the first sound-absorbing member 72 can also be fixed to the first support 71.

[0045] As shown in the drawings, Figures 4 to 6 As shown in the drawings, in one embodiment, the diameter of the first sound-absorbing hole 711 is greater than the diameter of the side air inlet 121, and the diameter of the side air inlet 121 is greater than the diameter of the first micro-hole. By setting different diameters, the dislocation is further enhanced, and the appearance of the technology is enhanced. The diameter of the first sound-absorbing hole 711 is 1.9-2.7 mm, the diameter of the side air inlet 121 is 0.9-1.7 mm, and the diameter of the first micro-hole is 0.4-0.8 mm.

[0046] As shown in the drawings, Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown in the drawings, the housing 1 contains a sound-absorbing assembly, which is arranged between the cylinder 2 and the air inlet 12 and / or between the cylinder 2 and the air outlet 13. In this embodiment, the sound-absorbing assembly is arranged between the cylinder 2 and the air inlet 12 and between the cylinder 2 and the air outlet 13. The sound-absorbing assembly includes a first sound-absorbing assembly 7 and a second sound-absorbing assembly 8, the first sound-absorbing assembly 7 is arranged between the cylinder 2 and the air inlet 12, and the second sound-absorbing assembly 8 is arranged between the cylinder 2 and the air outlet 13. The sound-absorbing assembly is arranged before entering the cylinder 2 and after leaving the cylinder 2, which can effectively absorb and block the noise generated by the operation of the fan assembly 4 and the motor assembly 3. This double sound-absorbing design can reduce the scattering and propagation of noise, especially when the motor assembly 3 is running at high speed, the noise reduction effect is more obvious. In addition, the arrangement of the sound-absorbing assembly optimizes the air inlet and outlet, which can make the air flow more stable, reduce the turbulence and resistance of the air flow, and this optimization not only reduces the noise, but also improves the heat dissipation efficiency.

[0047] As shown in the drawings, Figures 4 to 6As shown in the drawings, in one embodiment, the air inlet 12 comprises a first air inlet area and a second air inlet area, the rear end of the shell 1 forms the first air inlet area, and the side wall of the shell 1 corresponding to the first support 71 forms the second air inlet area. The rear air inlet 122 corresponds to the first air inlet area, and the side air inlet 121 corresponds to the second air inlet area. The rear air inlet can provide straight flow, the side air inlet can reduce the direct impact of airflow, and the combination of the rear air inlet and the side air inlet can provide good air inlet performance and facilitate the provision of sufficient effective air inlet area in a small portable fan.

[0048] As shown in the drawings, Figure 4 , Figure 5 and Figure 8 , in one embodiment, the second sound absorption assembly 8 comprises a second support 81 and a second sound absorption piece 82. The second support 81 is arranged on the inner front side of the shell 1, the second sound absorption piece 82 is arranged between the second support 81 and the shell 1, and the second support 81 is provided with a plurality of second sound absorption holes 811.

[0049] As shown in the drawings, Figure 2 , Figure 4 , Figure 5 and Figure 7 , in one embodiment, the flow guide piece 6 is mounted on the inner front side of the front end of the shell 1 from front to back, and at least part of the flow guide piece 6 is arranged on the front side of the second support 81, and at least part of the flow guide piece 6 is arranged on the front side of the second support 81. The radial inner side of the first outer ring part 61 is provided with a first flow guide surface 611, at least part of the first flow guide surface 611 radially increases from back to front. The radial outer side of the first inner ring part 62 is provided with a second flow guide surface 621, at least part of the second flow guide surface 621 radially decreases from back to front, and the front end of the first flow guide surface 611 exceeds the front end of the second flow guide surface 621. At least part of the inner side surface of the second support 81 radially decreases from back to front, at least part of the first flow guide surface 611 radially increases from back to front, and the inner side surface of the second support 81 is smoothly connected with the first flow guide surface 611. Meanwhile, in this embodiment, the second flow guide surface 621 first radially increases and then radially decreases from back to front, and the part of the second flow guide surface 621 radially increasing corresponds to the part of the second support 81 radially decreasing from back to front; the part of the second flow guide surface 621 radially decreasing corresponds to the part of the first flow guide surface 611 radially increasing. That is, the second flow guide surface 621, the inner side surface of the second support 81 and the first flow guide surface 611 form a flow channel which first decreases and then increases from back to front.

[0050] This design of first reducing and then increasing is a common aerodynamic optimization strategy, usually referred to as the application of "Venturi Effect". This design converts part of the static pressure into kinetic energy, and then partially restores the kinetic energy to static pressure, thereby optimizing the flow characteristics of the air flow. In the narrowing section, the air flow rate increases, which can more efficiently exhaust the air, especially suitable for scenarios that require rapid ventilation; in the expanding section, the air flow rate gradually decreases, and the pressure recovers, thereby reducing energy loss and improving the overall efficiency of the system; by optimizing the flow characteristics of the air flow, reducing air flow turbulence and impact, thereby reducing the noise of the system during operation; better control of air flow distribution, making the air flow more evenly diffuse to the target area, reducing vortex and resistance of air flow near the air outlet 13.

[0051] Of course, in other embodiments, the second flow guide surface 621 can also increase radially from back to front, or first increase radially from back to front, and then remain unchanged radially, without being limited by the examples.

[0052] As shown in Figure 4 , Figure 5 , Figure 6 and Figure 8 , in one embodiment, the axial length of the first sound absorption assembly 7 is greater than the axial length of the second sound absorption assembly 8, and the axial length ratio of the first sound absorption assembly 7 to the second sound absorption assembly 8 is 2-4. The air flow speed and pressure at the inlet are usually higher than at the outlet, so a longer first sound absorption assembly 7 is needed to handle high-energy air flow. The longer first sound absorption assembly 7 can reduce air resistance while reducing noise by reasonable design structure (such as multi-layer staggered inlet structure). While the noise at the outlet is mainly caused by mechanical vibration of the motor assembly 3 and the fan assembly 4 and secondary disturbance of the air flow, the design of the second sound absorption assembly 8 at the outlet focuses more on absorbing high-frequency noise. In this embodiment, the second sound absorption piece 82 in the second sound absorption assembly 8 is sound absorption cotton, which has good noise absorption effect. Of course, in other embodiments, the second sound absorption assembly 8 can be organic fiber material, inorganic fiber material, cotton, foamed plastic, sponge, perforated plate, leather, rubber, plastic, metal, etc. Designing the axial length of the second sound absorption assembly 8 to be 1 / 4-1 / 2 of the axial length of the first sound absorption assembly 7 can reduce the overall axial length of the air outlet piece 100, thereby reducing the overall volume of the portable fan.

[0053] As shown in Figures 3 to 5As shown in the drawings, in one embodiment, the housing 1 is provided with a stopper 101. The stopper 101 is radially arranged between the cylinder body 2 and the housing 1. The first support 71 is mounted from the rear side of the housing 1 to the front. The first support 71 abuts against the stopper 101. The rear end of the stopper 101 is rearward beyond or flush with the rear end of the fan assembly 4. The stopper 101 radially fixes the cylinder body 2 and axially abuts against the first support 71, thereby forming the air inlet cavity 14 and the area of the cylinder body 2. The stopper 101 is rearward beyond or flush with the rear end of the fan assembly 4, so that the fan assembly 4 does not excessively affect the fluid in the air inlet cavity 14. The stopper 101 also abuts against the rear end of the cylinder body 2, so that the cylinder body 2 and the first support 71 are not dislocated or shifted.

[0054] As shown in the drawings, Figures 4 to 6 In one embodiment, the inner diameter of the first support 71 is 25.5-29.8 mm, and the inner diameter of the second support 81 is 25.9-28.4 mm. The cylinder body 2 comprises a second outer ring portion 21, a second inner ring portion 22, and a plurality of second connecting leaves 23 connecting the second outer ring portion 21 and the second inner ring portion 22. The ratio of the inner diameter of the second outer ring portion 21 to the inner diameter of the first sound-absorbing assembly 7 is 0.8-1.2, and the ratio of the inner diameter of the second outer ring portion 21 to the inner diameter of the second sound-absorbing assembly 8 is 0.8-1.2. The inner diameter of the first sound-absorbing assembly 7, i.e. the inner diameter of the first support 71, and the inner diameter of the second sound-absorbing assembly 8, i.e. the inner diameter of the second support 81. That is, the inner diameters of the first support 71, the second outer ring portion 21 and the second support 81 are approximately equal or not much different, so that the overall air duct is more smooth. The inner diameters of the first support 71, the second outer ring portion 21 and the second support 81 are relatively small, so that the overall volume of the air outlet 100 is small, which is convenient for users to carry.

[0055] As shown in the drawings, Figure 9 In one embodiment, the cylinder body 2 further comprises a buffer 24 made of soft rubber. The buffer 24 is fixed to the outside of the second outer ring portion 21, so that the cylinder body 2 is better fixed in the stopper 101. Of course, in other embodiments, the buffer 24 can not be provided. Figure 4 , Figure 5 and Figure 9As shown, the motor assembly 3 is an outer rotor motor, which comprises a stator assembly 31 and a rotor assembly 32. The rotor assembly 32 comprises a rotating shaft 321, a bearing 322, a magnetic ring 323 and a housing 324. The fan assembly 4 comprises a hub 41 and a plurality of blades 42 arranged around the hub 41 radially outward. One end of the rotating shaft 321 is fixed to the inner side of the second inner ring portion 22, and the other end of the rotating shaft 321 is fixed to the hub 41. The bearing 322 is arranged on the outer side of the rotating shaft 321 and is also fixed to the inner side of the second inner ring portion 22. The magnetic ring 323 is fixed to the radially inner side of the housing 324 and is arranged on the radially outer side of the stator assembly 31. The housing 324 is directly fixed to the rotating shaft 321, so that the rotating shaft 321, the housing 324 and the magnetic ring 323 can rotate synchronously. By arranging the motor assembly 3 in the form of an outer rotor, the fan assembly 4 is directly driven to rotate, and the motor assembly 3 is arranged reasonably.

[0056] As shown in Figure 4 and Figure 10 In one embodiment, a rechargeable battery 201 is arranged in the handheld portion 200, which supplies power to drive the motor assembly 3. The handheld portion 200 is provided with a switch assembly 202, which comprises a stepless adjusting member 2021, a pressing member 2022 and an adjusting plate 2023. The stepless adjusting member 2021 and the pressing member 2022 are electrically connected with the adjusting plate 2023. It should be understood that the stepless adjusting member 2021 is also matched with an encoder 2024, which is connected with an air volume adjusting circuit. When the stepless adjusting member 2021 is rolled, the encoder 2024 outputs a digital signal, so as to realize stepless adjustment of the air volume of the portable fan.

[0057] A main circuit board 203 is arranged in the handheld portion 200, which is electrically connected with the rechargeable battery 201, the adjusting plate 2023 and one or more circuit boards in the air outlet member 100. In the present embodiment, the air outlet member 100 is provided with two circuit boards, one of which is arranged at the front end of the second inner ring portion 22, and the other of which is arranged at the front end of the first inner ring portion 62. The circuit board arranged at the front end of the second inner ring portion 22 is used to connect the motor assembly 3, so as to drive the fan assembly 4. The circuit board arranged at the front end of the first inner ring portion 62 is used to display the air volume, the power, the gear and the like. In front of the circuit board, a display screen (not numbered) is also arranged, which is used to display the corresponding values through light transmission.

[0058] As shown in Figures 4 to 6As shown, in one embodiment, the rear frame 91 is further provided with a light-transmitting portion 92, the mounting portion 712 is mounted with a light-emitting member 10, the light-emitting member 10 emits light rearward through the light-transmitting portion 92. Thus, the portable fan also has the function of lighting, which enriches the function of the portable fan. The light-transmitting portion 92 is arranged at the center of the rear frame 91, the light-emitting member is also arranged at the center of the mounting portion 712, the rear air inlet 122 is arranged at the radial outer side of the light-transmitting portion 92 of the rear frame 91, and corresponds to the blade 42 of the fan assembly 4, thereby facilitating the formation of straight-flow blowing.

[0059] The above detailed description is only a description of the preferred embodiments of the present application, and does not limit the patent scope of the present application. Therefore, any equivalent technical changes made according to the description and drawings of the present application are included in the patent scope of the present application.

Claims

1. An air outlet member characterized by, It comprises: a shell, a rear side air inlet, a front side air outlet, a cylinder fixed in the shell; a motor assembly fixed to the cylinder; a fan assembly fixed to the cylinder and the motor assembly and at least partially accommodated in the cylinder; a nozzle fixed to the front end of the shell; wherein the front end of the shell is provided with a first magnetic attraction element, the nozzle is provided with a second magnetic attraction element corresponding to the first magnetic attraction element, and the shell and the nozzle are magnetically attracted and fixedly connected through the first magnetic attraction element and the second magnetic attraction element.

2. The air outlet member of claim 1, wherein: It further comprises a flow guide element, which comprises a first inner ring part and a first outer ring part, a plurality of first connecting leaves connecting the first inner ring part and the first outer ring part, and the first outer ring part being fixed to the front end of the shell.

3. The air outlet member of claim 2, wherein: The outer side of the first outer ring part is formed with a fixing part, and the first magnetic attraction element is fixed to the fixing part; the fixing part and the radially inner side of the front end of the shell jointly form a groove, and the first magnetic attraction element is accommodated in the groove.

4. The air outlet member of claim 3, wherein: At least one of the first magnetic attraction element and the second magnetic attraction element is annular, and at least one of the first magnetic attraction element and the second magnetic attraction element is a magnet.

5. The air outlet member of claim 4, wherein: The material of the magnet in the first magnetic attraction element and the second magnetic attraction element is neodymium iron boron strong magnet.

6. The air outlet member of claim 3, wherein: The first magnetic attraction element protrudes forwardly from the shell and the front end of the first outer ring part, the second magnetic attraction element is fixed to the rear side of the nozzle, and the inner diameter of the rear end of the nozzle matches the outer diameter of the first magnetic attraction element.

7. The air outlet member of claim 2, wherein: The radially inner side of the first outer ring part is provided with a first flow guide surface, at least part of the first flow guide surface radially increases from rear to front, the radially outer side of the first inner ring part is provided with a second flow guide surface, at least part of the second flow guide surface radially decreases from rear to front, and the front end of the first flow guide surface exceeds the front end of the second flow guide surface.

8. The air outlet member of claim 1, wherein: The nozzle radially decreases from rear to front, the front end of the nozzle is oval, and the front end of the nozzle is fixed with bristles.

9. The air outlet member of claim 1, wherein: The nozzle radially decreases from rear to front, the inner diameter of the rear end of the nozzle is 23-40mm, the front end of the nozzle is circular, and the diameter of the front end of the nozzle is 14-18mm.

10. A portable fan comprising the air outlet piece of any one of claims 1-9, characterized by: It further comprises a hand-held part, the hand-held part is provided with a rechargeable battery, and the rechargeable battery drives the motor assembly.

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