Portable fan

Abstract

The utility model provides a portable fan which comprises a shell, a fan cover, a fan cover and a fan cover. The fan is arranged in the shell and comprises a hub and a plurality of fan blades arranged on the outer side of the hub; the motor is installed in the shell and used for driving the fan assembly to rotate; the first fluid director is arranged at the rear end of the shell, and a first distance is formed between the rear end of the first fluid director and the rear end of the hub; the second fluid director is arranged at the front end of the shell, and a second distance is formed between the front end of the second fluid director and the front end of the hub; wherein the first spacing is smaller than the second spacing. By arranging the first fluid director and the second fluid director, the air pressure and the air effect are enhanced, the first interval and the second interval are arranged, and the first interval is smaller than the second interval, so that airflow has enough air inlet distance and air outlet distance, and fluid guiding, rectifying and pressurizing structures are arranged in the air inlet distance and the air outlet distance; and the air volume, the air pressure and the air effect can be improved under the condition that the size of the portable fan is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a portable fan with high wind pressure, wind volume and wind effect. Background Art

[0002] With the development of technology, people have higher and higher requirements for the portability of equipment, so that it can meet the needs of business trips, travel, outdoor use, etc. in addition to home use. Common portable rotating equipment includes: portable fans, portable air pumps, portable hair dryers, etc.

[0003] Existing portable fans usually simply pursue lightness and small size. The fan part is thin and flat, and the fan is very close to the air inlet and outlet. The airflow passes through the fan, the wind pressure is small, the air volume driven by the fan is also small, and the air outlet efficiency is low. Therefore, the problem of how to use a portable fan with limited size to blow strong wind needs to be solved urgently. Summary of the invention

[0004] In view of this, the utility model provides a portable fan, which enhances wind pressure and wind efficiency by setting a first deflector and a second deflector, and sets a first spacing and a second spacing, wherein the first spacing is smaller than the second spacing, so that the airflow has sufficient air inlet distance and air outlet distance, and a guide, rectifying, and pressurizing structure is set in the air inlet distance and the air outlet distance to ensure that the portable fan can increase the air volume, wind pressure, and wind efficiency even when the volume is limited.

[0005] The utility model provides a portable fan, comprising: a shell, with air inlet at the rear end and air outlet at the front end; a fan, arranged in the shell, the fan comprising a hub and a plurality of fan blades arranged on the outside of the hub; a motor, installed in the shell and used to drive the fan assembly to rotate; a first deflector, arranged at the rear end of the shell, with a first spacing between the rear end of the first deflector and the rear end of the hub; a second deflector, arranged at the front end of the shell, with a second spacing between the front end of the second deflector and the front end of the hub; wherein the first spacing is smaller than the second spacing.

[0006] Furthermore, the first deflector includes a rear shell, a card shell, a fairing and a fastener, the fastener fixes the rear shell and the card shell, the rear shell and the card shell clamp the fairing, and the rear shell, the card shell and the fairing are all located on the rear side of the wheel hub.

[0007] Further, the rear shell includes a planar portion, a radial guide portion and an axial guide portion which are radially connected in sequence, a first step portion is provided at the front end of the axial guide portion, a bump is protruding from the first step portion, a clamping hole is provided at the edge of the fairing, the edge of the fairing is provided on the first step portion, and the clamping hole cooperates with the bump; the rear end of the clamping shell is arranged corresponding to the first step portion to clamp the fairing with the first step portion, the front end of the rear shell is provided with a first fixing hole, the rear end of the clamping shell is provided with a second fixing hole, and the fastener fixes the first fixing hole and the second fixing hole.

[0008] Furthermore, the radial guide portion is an arc surface, and radially decreases from the planar portion to the axial guide portion, the minimum inner diameter of the planar portion is larger than the inner diameter of the axial guide portion, and the inner diameter of the axial guide portion differs from the inner diameter of the housing by less than 0.2 mm; a cylinder is also provided in the outer shell, and the cylinder is used to install the motor and the fan, and the cylinder includes an outer ring portion, an inner ring portion, and a plurality of first connecting blades connecting the outer ring portion and the inner ring portion, the motor is installed on the inner ring portion, the fan is provided in the outer ring portion, and is installed on the rear side of the motor, and the inner diameter of the housing differs from the inner diameter of the outer ring portion by less than 0.5 mm.

[0009] Furthermore, the second deflector includes an outer cover portion, an inner cover portion, and a plurality of second connecting leaves connecting the outer cover portion and the inner cover portion, and the axial thickness of the second deflector is 12.7-12.82 mm; the front end of the outer shell protrudes with a second step portion, and the front end of the outer cover portion first expands and extends radially forward and outward, and then bends and extends backward, and wraps the second step portion.

[0010] Furthermore, the rear end of the inner cover part is open, the front end is sealed, and a negative pressure surface recessed backward is formed at the front end of the inner cover part. The outer side surface of the inner cover part first radially increases and extends from the back to the front and then radially decreases and extends. The radially increased portion of the outer side surface of the inner cover part is longer than the radially decreased portion of the outer side surface of the inner cover part. The diameter of the front end of the inner cover part is larger than the diameter of the rear end of the inner cover part.

[0011] Furthermore, the front end of the inner ring portion is open, and a driving plate is provided at the front end of the inner ring portion, and the front end of the inner ring portion is arranged adjacent to the rear end of the inner cover portion; the second connecting leaf extends obliquely, and the front end of the second connecting leaf connecting the outer cover portion is in front of the front end of the second connecting leaf connecting the inner cover portion.

[0012] Furthermore, the minimum inner diameter of the planar part is R1, the distance between the planar part and the rear end of the hub is D1, and 0.5R1 < D1 < R1 < 2D1; the inner diameter of the axial flow guiding part is R2, the distance between the rear end of the axial flow guiding part and the rear end of the hub is D2, and 0.5R2 < D2 < R2 < 2D2; the fairing includes a plurality of air inlet through holes, and the thickness of the fairing is 0.4 mm.

[0013] Furthermore, the length of the housing in the axial direction is 53.6 - 54 mm. At least part of the first deflector is arranged inside the housing, at least part of the second deflector is arranged inside the housing, and the distance between the rear end of the first deflector and the front end of the second deflector is 59.6 - 60 mm.

[0014] Furthermore, the fan is an axial - flow fan. The fan includes a hub and a plurality of fan blades annularly arranged outside the hub. The hub extends radially and increases from the rear to the front, and the hub is arc - shaped; the motor is a high - speed three - phase motor.

[0015] Compared with the prior art, the portable fan of the present utility model has the following beneficial effects: By providing the first deflector and the second deflector, the wind pressure and wind efficiency are enhanced. And by setting the first distance and the second distance, with the first distance less than the second distance, the air flow has sufficient air inlet distance and air outlet distance, so as to set structures for guiding, rectifying, and boosting pressure in the air inlet distance and air outlet distance, ensuring that the portable fan can also improve the air volume, wind pressure, and wind efficiency under the condition of limited volume. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the portable fan provided by the present application;

[0017] Figure 2 is an exploded schematic diagram of the portable fan provided by the present application;

[0018] Figure 3 is an exploded schematic diagram of the portable fan from another perspective provided by the present application;

[0019] Figure 4 is a cross - sectional view of the portable fan provided by the present application;

[0020] Figure 5 is a cross - sectional view of the portable fan from another perspective provided by the present application;

[0021] Figure 6 is a schematic structural diagram of the cylinder provided by the present application;

[0022] Figure 7 is a schematic structural diagram of the portable fan with some parts removed provided by the present application;

[0023] Figure 8 is a cross-sectional view of some parts of the portable fan provided by the present application removed;

[0024] Fig. 9 It is a schematic diagram of the exploded view of the portable fan air inlet cover assembly provided in the present application. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figures 1 to 4 As shown, the portable fan of the present application includes an air outlet portion 100 and a hand-held portion 200. The air outlet portion 100 is used for discharging air, and the hand-held portion 200 is used for being held by a user, so that the user can hold and move the portable fan for convenient use.

[0027] The air outlet 100 includes an outer shell 1, a casing 2, a first buffer 30 and a cylinder 4 from the outside to the inside. The cylinder 4 has air inlet at the rear end and air outlet at the front end. A motor 5 and a fan 6 are arranged inside the cylinder 4. The motor 5 is a high-speed three-phase motor. The high-speed three-phase motor can provide sufficient power and rotation speed to ensure the wind force of the portable fan. The first buffer 30 is arranged outside the cylinder 4, the casing 2 is arranged outside the first buffer 30, and the outer shell 1 is arranged outside the casing 2. By setting a four-layer structure of the cylinder 4, the first buffer 30, the casing 2 and the outer shell 1, the layers are fixed and the overall structure is stable. While using a high-speed three-phase motor, the overall shock absorption effect is guaranteed to be good. The first buffer 30 is arranged outside the cylinder 4. The first buffer 30 absorbs and reduces the vibration caused by the high-speed three-phase motor in time, so that the portable fan can rotate continuously and stably at a high speed.

[0028] In one embodiment, Figures 1 to 4 As shown, the casing 2 is integrally formed and connected from front to back, a limiting portion 20 is provided inside the casing 2, the cylinder 4 and the first buffer 30 are inserted into the casing 2 from back to front, and the limiting portion 20 limits the cylinder 4 and the first buffer 30. The outer diameter of the cylinder 4 is equal to or greater than the inner diameter of the first buffer 30, and the outer diameter of the first buffer 30 is equal to or greater than the inner diameter of the casing 2. The cylinder 4, the first buffer 30 and the casing 2 are tightly matched and have a stable structure. The outer shell 1 is integrally formed and connected from front to back, the outer diameter of the casing 2 is smaller than the inner diameter of the casing 1, and a plurality of ribs are equidistantly provided on the inner surface of the casing 1, so that the casing 2 can be easily inserted into the inner side of the casing 1, and a plurality of ribs can help tighten the casing 2. Of course, in other embodiments, a plurality of ribs can be equidistantly provided on the outer surface of the casing 2.

[0029] like Figure 2 and Figure 4 As shown, the first buffer member 30 is used as an isolation buffer interface between the barrel 4 and the housing 2. In one embodiment, the first buffer member 30 is a smooth surface; in another embodiment, in order to enhance its isolation and buffering properties, a plurality of convex points may be arranged at intervals on the outer surface of the first buffer member. In addition, the first buffer member 30 may only cover part of the outer surface of the barrel 4, or the entire outer surface of the barrel 4, or the front end face and the rear end face of the barrel 4, but is not limited thereto.

[0030] In one embodiment, Figure 2 , Figure 4 and Figure 6 As shown, the cylinder 4 includes an outer ring portion 40, an inner ring portion 41, and a plurality of first connecting leaves 42 connecting the outer ring portion 40 and the inner ring portion 41. The inner ring portion 41 is shorter than the outer ring portion 40. The inner ring portion 41 is located at the inner side corresponding to the front end portion of the outer ring portion 40, and the front end of the inner ring portion 41 exceeds the front end of the outer ring portion 40. A base plate 44 is provided in the inner ring portion 41, and a hollow shaft cylinder 45 protrudes backward from the base plate 44. The motor 5 includes a stator assembly 51 and a rotor assembly. The stator assembly 51 and the rotor assembly are nested and fixed, and fixed to the shaft cylinder 45 from the rear. The fan 6 is installed on the rear side of the rotor assembly. The motor 5 also includes a drive plate 52. The front end of the inner ring portion 41 is provided with a receiving portion 46 and a buckle 47. The receiving portion 46 is used to receive the drive plate 52, and the buckle 47 is used to buckle and fix the drive plate 52. The base plate 44 is provided with a wire opening 440, through which a wire passes to electrically connect the drive plate 52 and the stator assembly 51. The drive plate 52 is electrically connected to the stator assembly 51, and drives the rotor assembly and the fan 6 to rotate.

[0031] In one embodiment, Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, the rotor assembly includes a rotating shaft 501, a bearing 502 and a stopper 503, and the bearing 502, the stopper 503 and the stator assembly 51 are all inserted outside the rotating shaft 501. The shaft cylinder 45 extends backward beyond the rear end of the inner ring portion 41, but does not extend beyond the rear end of the outer ring portion 40. The rotating shaft 501 is inserted into the shaft cylinder 45 from back to front, and two bearings 502 are provided, one of which is clamped outside the rotating shaft 501 and inside the shaft cylinder 45 from back to front, and the other bearing 502 is clamped outside the rotating shaft 501 and inside the shaft cylinder 45 from front to back. The shaft cylinder 45 is provided with a second buffer (not shown, the same below) between the two bearings 502, and the inner diameter of the shaft cylinder 45 corresponding to the second buffer is smaller than the inner diameter of the shaft cylinder 45 corresponding to the bearing 502. A slot is provided radially outside the front of the rotating shaft 501, and the stopper 503 is fixed in the slot from front to back, and a third buffer 31 is provided between the front bearing 502 and the stopper 503. The second buffer and the third buffer 31 can effectively absorb and reduce the vibration between the rotating shaft 501 and the shaft cylinder 45, and the shock absorption effect is good.

[0032] In one embodiment, Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, the rotor assembly also includes a housing 504 and a magnetic ring 505, the housing 504 is open to the front, the housing 504 includes a rear portion and a side portion, the magnetic ring 505 is fixed to the inner side of the side portion of the housing 504, and the stator assembly 51 is fixed to the inner side of the magnetic ring 505. In the radial direction, the stator assembly 51, the magnetic ring 505 and the side portion of the housing 504 are sleeved on the outer side of the shaft cylinder 45, and the front end of the side portion of the housing 504 and the inner ring portion 41 are arranged in close proximity in the axial direction. The interval between the side portion of the housing 504 and the rear end of the inner ring portion 41 is smaller than the interval between the rear portion of the housing 504 and the rear bearing 502, so that even if the portable fan falls or is hit by other external impacts, the rear portion of the housing 504 will not impact and damage the rear bearing 502. The distance between the side of the casing 504 and the rear end of the inner ring portion 41 is smaller than the distance between the front end of the rotating shaft 501 and the rear end of the driving plate 52, so that even if the portable fan falls or is hit by other external impacts, the front end of the bearing 502 will not hit and damage the driving plate 52.

[0033] In one embodiment, Figure 2 , Figure 4 , Figure 5 and Figure 8As shown, the outer diameter of the barrel 4 is 23.71-24.05 mm, and the length of the barrel 4 is 30-33.05 mm. The volume of the barrel 4 is small, so that the overall volume of the portable fan can also be small, thereby improving the portability of the portable fan. The barrel 4 also includes a plurality of extension leaves 43, which correspond to the first connecting leaves 42 one by one, and extend backward from the first connecting leaves 42 to form the extension leaves 43. The first connecting leaves 42 extend vertically forward, and the extension leaves 43 extend in an arc shape, and the plurality of extension leaves 43 surround the outside of the side of the housing 504.

[0034] In one embodiment, Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the fan 6 is fixedly arranged at the rear end of the rotating shaft 501, and the front end of the fan 6 is arranged adjacent to the rear end of the housing 504 in the axial direction. The fan 6 is arranged coaxially with the motor 5, and the fan 6 and the housing 504 are arranged adjacent to each other, so there is no need to arrange a transmission device between the motor 5 and the fan 6, which effectively improves the transmission efficiency of the fan 6. The fan 6 includes a hub 60 and a plurality of blades 61 arranged on the outside of the hub 60, and a rib blade 62 is arranged on the inner side of the hub 60. A notch is penetrated through the rear of the housing 504, and the fourth buffer 32 passes through the notch at the rear of the housing 504 and is arranged between the rear bearing 502 and the rib blade 62 of the fan 6. The rear end of the fourth buffer 32 abuts against the rib blade 62, and the front end of the fourth buffer 32 abuts against the rear bearing 502. The fourth buffer 32 effectively absorbs and reduces the vibration of the high-speed rotation of the fan 6, and has a good shock absorption effect.

[0035] In one embodiment, Figure 4 , Figure 5 and Figure 8 As shown, one of the two bearings 502 is sleeved with a fifth buffer (not numbered, the same below); in another embodiment, the outer sleeves of the two bearings 502 are sleeved with fifth buffers, and both are arranged in the shaft cylinder 45; in another embodiment, the outer sleeves of the two bearings 502 are sleeved with fifth buffers, the front bearing 502 is arranged in the shaft cylinder 45, and the rear bearing 502 is not arranged in the shaft cylinder 45, but is directly arranged in the rotor assembly. The fifth buffer effectively absorbs and reduces the vibration of the high-speed rotation of the bearing 502, and has a good shock absorption effect.

[0036] In one embodiment, Figures 3 to 5As shown, the fan 6 is a diagonal flow fan 6, the hub 60 radially increases and extends from the back to the front, and the hub 60 is arc-shaped. The diameter of the hub 60, the diameter of the housing 504, and the diameter of the inner ring portion 41 are less than 0.5 mm apart from each other, and in the axial direction, the housing 504 and the inner ring portion 41 are arranged closely spaced from front to back, and the hub 60 and the housing 504 are arranged closely. The rear end of the fan 6 does not extend backward beyond the rear end of the outer ring portion 40, and the fan 6 can be completely arranged in the four-layer structure of the outer ring portion 40, the first buffer 30, the casing 2, and the outer shell 1, which can effectively absorb and reduce the noise of the high-speed rotation of the fan 6. It should be understood that the channel between the inner ring portion 41 and the outer ring portion 40, and the channel between the side of the housing 504 and the outer ring portion 40 belong to the air duct of the portable fan. The fan 6 rotates, and the high-speed rotating blades 61 generate high-speed turbulence, which first flows through the bent and extended extension blades 43 to be initially combed, then flows through the first connecting blades 42 extending vertically forward to be combed again, and is guided to be ejected vertically forward to reduce kinetic energy loss and retain large air volume and high wind pressure.

[0037] In one embodiment, Figures 2 to 5 As shown, the air outlet 100 further includes a first deflector 7 and a second deflector 8. The first deflector 7 is fixed to the rear side of the casing 2 and is arranged at the rear side of the outer shell 1. The second deflector 8 is fixed to the front side of the casing 2 and is arranged at the front side of the outer shell 1. A first fixing portion 21 is provided at the front side of the casing 2, and a first matching portion 70 is provided at the outer side of the second deflector 8. The first fixing portion 21 and the first matching portion 70 are fixed in a corresponding manner. A second fixing portion 22 is provided at the rear side of the casing 2, and the first deflector 7 is provided with a second matching portion 80. The second fixing portion 22 and the second matching portion 80 are fixed in a corresponding manner.

[0038] In one embodiment, Figures 2 to 5 As shown, the axial length of the housing 1 is 53.6-54 mm, a first spacing is provided between the rear end of the first deflector 7 and the rear end of the hub 60, a second spacing is provided between the front end of the second deflector 8 and the front end of the hub 60, and the first spacing is smaller than the second spacing, so that the airflow has sufficient air inlet distance and air outlet distance, and a guide, rectifying and pressurizing structure is provided in the air inlet distance and the air outlet distance, so as to ensure that the portable fan can increase the air volume, wind pressure and wind efficiency even when the volume is limited.

[0039] In one embodiment, Figure 2 , Figure 3 , Figure 4 and Fig. 9As shown, the first deflector 7 includes a rear shell 71, a fairing 72, a card shell 73 and a fastener 74, wherein the fastener 74 fixes the rear shell 71 and the card shell 73, and the rear shell 71, the card shell 73 and the fairing 72 are all located at the rear side of the wheel hub 60. The rear shell 71 is hollow, and a protrusion 710 and a first fixing hole 714 are provided at the front end of the rear shell 71. A card hole 721 is provided at the edge of the fairing 72, and the card hole 721 cooperates with the protrusion 710, and the fairing 72 covers the radial inner side of the rear shell 71. A second fixing hole 730 is provided at the rear end of the card shell 73, and the fastener 74 fixes the first fixing hole 714 and the second fixing hole 730, and the rear shell 71 and the card shell 73 clamp the fairing 72. The fairing 72 includes a plurality of air inlet holes 720, and the thickness of the fairing 72 is 0.4 mm. The rear shell 71 includes a plane portion 711, a radial guide portion 712 and an axial guide portion 713 which are connected in sequence in a radial direction. The front end of the axial guide portion 713 is provided with a first step portion, the first step portion is provided with the protrusion 710, the edge of the fairing 72 is provided at the first step portion, and the clamping hole 721 cooperates with the protrusion 710. The rear end of the clamping shell 73 is provided corresponding to the first step portion to clamp the fairing 72 with the first step portion. The radial guide portion 712 is an arc surface, and is radially reduced from the plane portion 711 to the axial guide portion 713. The minimum inner diameter of the plane portion 711 is greater than the inner diameter of the axial guide portion 713. The inner side surface of the axial guide portion 713 extends forward substantially radially unchanged, and the inner side surface of the clamping shell 73 extends forward substantially radially unchanged. Of course, the inner side surface of the axial guide portion 713 and the inner side surface of the clamping shell 73 can also be radially gradually reduced and extended forward with a very small amplitude. The airflow is introduced from the arc-shaped radial guide portion 712, and the inner side surface of the axial guide portion 713 and the inner side surface of the housing 73 remain unchanged in radial direction, so that the airflow encounters less resistance and generates less turbulence, which can reduce the noise generated by airflow disturbance and help guide the airflow to flow forward. Under the condition that the overall volume of the portable fan is limited, the air volume and wind pressure are increased. At the same time, the fairing 72 with thickness and multiple air inlet holes 720 can organize the airflow well, so that the airflow can be more gathered and smoothly enter the portable fan.

[0040] In one embodiment, Figures 3 to 5, the minimum inner diameter of the flat portion 711 is R1, and the distance between the flat portion 711 and the rear end of the hub 60 is D1, where 0.5R < D1 < R1 < 2D1; the inner diameter of the axial guide portion 713 is R2, and the distance between the rear end of the axial guide portion 713 and the rear end of the hub 60 is D2, where 0.5R2 < D2 < R2 < 2D2. Excessive D1 and D2 will affect the layout distribution of the portable fan, while too small D1 and D2 will increase the intake loss of the portable fan and affect its performance. Therefore, by determining the numerical ranges of D1 and D2 corresponding to the values of R1 and R2, an excellent intake length can be designed, so that the resistance encountered by the airflow is smaller, the generated turbulence is less, the air volume, air pressure and air efficiency are improved, and the intake noise is reduced.

[0041] In one embodiment, as Figures 2 to 5 shown, the second deflector 8 includes an outer cover portion 81, an inner cover portion 82, and a plurality of second connecting blades 83 connecting the outer cover portion 81 and the inner cover portion 82. An air outlet of the portable fan is formed between the outer cover portion 81 and the inner cover portion 82. The second connecting blades 83 are axially spaced from the first connecting blades 42 by more than 3.5 mm. It should be understood that both the first connecting blades 42 and the second connecting blades 83 are stationary blades. Using double stationary blades instead of ordinary stationary blades, and there is also a gap between the double stationary blades. When the airflow passes through the double stationary blades, there will be sufficient buffer space, and part of the airflow will not rebound, which can prevent the generation of turbulent flow and thus reduce noise.

[0042] In one embodiment, as Figures 2 to 5 shown, the front end of the outer cover portion 81 is in front of the front end of the inner cover portion 82. The rear end of the inner cover portion 82 is open and the front end is sealed. A negative pressure surface 820 that is recessed backward is formed at the front end of the inner cover portion 82. The negative pressure surface 820 has the effects of wind gathering and air supplement, making the wind blown out from the air outlet more concentrated and strong, and the blowing distance farther. The outer side surface of the inner cover portion 82 first extends radially and increases and then extends radially and decreases from the rear to the front. The part where the outer side surface of the inner cover portion 82 extends radially and increases is longer than the part where the outer side surface of the inner cover portion 82 extends radially and decreases. The diameter of the front end of the inner cover portion 82 is larger than the diameter of the rear end of the inner cover portion 82. The front end of the inner ring portion 41 is open, and a driving plate 52 is provided at the front end of the inner ring portion 41, which is convenient for installing the driving plate 52 and is beneficial for the wire to connect the driving plate 52. The rear end of the inner cover portion 82 is closely arranged adjacent to the front end of the inner ring portion 41 to shield and protect the driving plate 52 and reduce the entry of dust and impurities into the driving plate 52, affecting normal use.

[0043] In one embodiment, the thickness of the second deflector 8 in the axial direction is 12.7-12.82 mm, which is conducive to enhancing wind pressure and making the air outlet distance farther. The front end of the housing 1 is protruding with a second step portion, and the front end of the outer cover portion 81 first expands and extends radially forward and outward, then bends and extends backward and wraps the second step portion, thereby strengthening the fit and fixation between the second deflector 8 and the housing 1.

[0044] In one embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the length of the housing 1 in the axial direction is 53.6-54 mm, at least part of the first deflector 7 is disposed inside the housing 1, at least part of the second deflector 8 is disposed inside the housing 1, and the distance between the rear end of the first deflector 7 and the front end of the second deflector 8 is 59.6-60 mm. The air outlet 100 is compact in size and easy to carry.

[0045] In one embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the handheld part 200 is provided with a power supply 209 and a control panel 210, and the air outlet 100 and the handheld part 200 are fixed. The outer shell 1 is provided with a notch 10 corresponding to the handheld part 200, and a first fool-proof block 11 is provided in front of the inner side of the outer shell 1 corresponding to the notch 10. The inner cover part 82 and the inner ring part 41 are arranged adjacent to each other in the axial direction, and a fool-proof hole 23 is provided on the front side of the casing 2. One of the second connecting leaves 83 is provided with a wire groove 830, and the wire groove 830 radially passes through the inner cover part 82 and the outer cover part 81, and a second fool-proof block 810 is provided on the outer side of the outer cover part 81 corresponding to the wire groove 830. The sleeve 2 is inserted into the outer shell 1 from back to front, the first anti-foolproof block 11 and the second anti-foolproof block 810 are both matched with the anti-foolproof hole 23, the missing groove 10, part of the anti-foolproof hole 23 and the wire groove 830 are connected, and the wire passes through the missing groove 10, the anti-foolproof hole 23 and the wire groove 830 to electrically connect the control board 210 and the drive board 52.

[0046] In one embodiment, Figures 1 to 4As shown, the housing of the handheld part 200 includes a left shell 201 and a right shell 202 that match each other, and the air outlet 100 also includes a mounting frame 9 protruding from the outer surface of the housing 1. A connecting frame 203 is provided inside the handheld part 200, and the connecting frame 203 includes a connecting top plate 204, and a front mounting portion 205, a rear mounting portion 206, a left mounting portion 207 and a right mounting portion 208 that extend downward from four sides of the connecting top plate 204 respectively. The connecting top plate 204 is fixedly connected with the mounting frame 9, the left shell 201 is fixedly connected with the left mounting portion 207, the right shell 202 is fixedly connected with the right mounting portion 208, and the boss of the right shell 202 is inserted into the front mounting portion 205 and the rear mounting portion 206, and the control panel 210 is clamped at the bottom of the connecting frame 203. The handheld part 200 further includes a switch 211 electrically connected to the front side of the control panel 210, an interface 212 electrically connected to the rear side of the control panel 210, and an anti-mistaken touch device 213 electrically connected to the side of the control panel 210. The switch 211 is exposed to the front side of the handheld part 200, the interface 212 is provided on the rear mounting part 206 and is exposed to the rear side of the handheld part 200, and the anti-mistaken touch device 213 is exposed to the left or right side of the handheld part 200. The power supply 209 is provided below the control panel 210 and is electrically connected to the control panel 210. The power supply 209 can directly supply power to the motor 5 to drive the fan 6 to rotate without connecting to an external power source.

[0047] In one embodiment, a sixth buffer member (not shown, the same below) is provided on the rear side of the negative pressure surface 820 , and the sixth buffer member is used for pressurizing and connecting the drive plate 52 and the control plate 210 , and can absorb the noise generated by the operation of the motor 5 .

[0048] It should be understood that the first buffer 31, the second buffer, the third buffer 32, the fourth buffer 33, the fifth buffer and the sixth buffer are all elastic, but the specific material and form can be selected from existing elastic materials, for example, the first buffer 31 can be a silicone material or a foam material; the second buffer, the third buffer 32, the fourth buffer 33 and the fifth buffer can be a spring material or a silicone material; the sixth buffer can be a silicone material or a foam material. The specific elastic material is not limited to the above examples, as long as it is elastic and can provide a buffering and shock absorbing effect.

[0049] 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. A portable fan, characterized in that: include: Shell, air inlet at the rear end and air outlet at the front end; A fan is disposed in the housing, the fan comprising a hub and a plurality of blades disposed outside the hub; A motor, installed in the housing, for driving the fan assembly to rotate; A first deflector is disposed at a rear end of the housing, and a first distance is formed between a rear end of the first deflector and a rear end of the hub; A second deflector is disposed at a front end of the housing, and a second distance is provided between a front end of the second deflector and a front end of the hub; Wherein, the first spacing is smaller than the second spacing.

2. The portable fan according to claim 1, characterized in that: The first deflector includes a rear shell, a card shell, a fairing and a fastener, the fastener fixes the rear shell and the card shell, the rear shell and the card shell clamp the fairing, and the rear shell, the card shell and the fairing are all located at the rear side of the wheel hub.

3. The portable fan according to claim 2, characterized in that: The rear shell includes a planar portion, a radial guide portion and an axial guide portion which are radially connected in sequence. A first step portion is provided at the front end of the axial guide portion, and a bump is protruding from the first step portion. A clamping hole is provided at the edge of the fairing, and the edge of the fairing is provided on the first step portion, and the clamping hole cooperates with the bump. The rear end of the clamping shell is arranged corresponding to the first step portion to clamp the fairing with the first step portion. A first fixing hole is provided at the front end of the rear shell, and a second fixing hole is provided at the rear end of the clamping shell. The fastener fixes the first fixing hole and the second fixing hole.

4. The portable fan according to claim 3, characterized in that: The radial guide portion is an arc surface, and radially decreases from the planar portion to the axial guide portion. The minimum inner diameter of the planar portion is larger than the inner diameter of the axial guide portion, and the inner diameter of the axial guide portion differs from the inner diameter of the housing by less than 0.2 mm. A cylinder is also provided in the outer shell, and the cylinder is used to install the motor and the fan. The cylinder includes an outer ring portion, an inner ring portion, and a plurality of first connecting blades connecting the outer ring portion and the inner ring portion. The motor is installed on the inner ring portion, and the fan is provided in the outer ring portion and installed on the rear side of the motor. The inner diameter of the housing differs from the inner diameter of the outer ring portion by less than 0.5 mm.

5. The portable fan according to claim 4, characterized in that: The second deflector includes an outer cover portion, an inner cover portion, and a plurality of second connecting leaves connecting the outer cover portion and the inner cover portion, and the axial thickness of the second deflector is 12.7-12.82 mm; the front end of the outer shell protrudes with a second step portion, and the front end of the outer cover portion first expands and extends radially forward and outward, and then bends and extends backward and wraps the second step portion.

6. The portable fan according to claim 5, characterized in that: The rear end of the inner cover part is open, the front end is sealed, and a negative pressure surface recessed backward is formed at the front end of the inner cover part. The outer side surface of the inner cover part first radially increases and extends from the back to the front and then radially decreases and extends. The radially increased portion of the outer side surface of the inner cover part is longer than the radially decreased portion of the outer side surface of the inner cover part. The diameter of the front end of the inner cover part is larger than the diameter of the rear end of the inner cover part.

7. The portable fan according to claim 6, characterized in that: The front end of the inner ring part is open, and a driving plate is provided at the front end of the inner ring part. The front end of the inner ring part is closely arranged adjacent to the rear end of the inner cover part. The second connecting leaf extends obliquely, and the front end of the second connecting leaf connecting the outer cover part is in front of the front end of the second connecting leaf connecting the inner cover part.

8. The portable fan according to claim 3, characterized in that: The minimum inner diameter of the flat part is R1, the distance between the flat part and the rear end of the hub is D1, and 0.5R1 < D1 < R1 < 2D1. The inner diameter of the axial flow guiding part is R2, the distance between the rear end of the axial flow guiding part and the rear end of the hub is D2, and 0.5R2 < D2 < R2 < 2D2. The fairing includes a plurality of air inlet through holes, and the thickness of the fairing is 0.4 mm.

9. The portable fan according to claim 1, characterized in that: The length of the housing in the axial direction is 53.6 - 54 mm. At least part of the first flow deflector is arranged inside the housing, at least part of the second flow deflector is arranged inside the housing, and the distance between the rear end of the first flow deflector and the front end of the second flow deflector is 59.6 - 60 mm.

10. The portable fan according to claim 1, characterized in that: The fan is an axial-flow fan. The fan includes a hub and a plurality of fan blades arranged around the outside of the hub. The hub extends radially and increases from the rear to the front, and the hub is arc-shaped. The motor is a high-speed three-phase motor.

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