Portable fan and handheld fan

Abstract

The invention provides a portable fan which comprises a shell provided with an air inlet, a containing cavity and an air outlet which communicate with one another, and the shell further comprises a base and a hollow sleeve protruding from the base to the containing cavity; the fan assembly is contained in the shell and comprises a hub and a plurality of fan blades arranged on the outer surface of the hub at intervals, and a rotating shaft is fixed to the center of the inner side of the hub; the motor comprises a stator and a rotor, the stator and the rotor are both contained in the hub, the sleeve is sleeved with the stator, the stator comprises a coil, the rotor is arranged between the stator and the hub in the radial direction, and the rotating shaft is inserted into the sleeve; and the driving circuit board is not arranged between the base and the stator, the driving circuit board is electrically connected with the lead of the coil so as to drive the fan assembly to rotate, and air passes through the containing cavity from the air inlet and then is blown out from the air outlet.

Description

[0001] This application claims priority to International Application No. PCT / CN2023 / 125354, filed October 19, 2023, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of fans, in particular to a small portable fan and a handheld fan. BACKGROUND

[0003] As a very common household appliance in people's daily life, the fan drives air flow to dissipate heat for people. The current portable fan is welcomed by people due to its light weight and convenient carrying. The portable fan requires the overall product to be as low and small as possible.

[0004] In the design and production process in the existing market, the brushless three-phase motor applied usually has the following connection mode between the stator and the PCB in the motor: the coil group is wound on the motor stator framework to form a motor stator, metal pins are reserved on the motor stator framework, the U, V, and W of the coil are connected to the metal pins, and the PCB is provided with a reserved hole for connecting the metal pins, and the metal pins are inserted into the reserved hole to be electrically connected with the PCB. The U, V, and W of the coil are connected with the PCB through the metal pins provided on the stator framework. However, the motor stator framework of the existing portable fan is provided with more and more coils, and there is no extra space to set the metal pins on the motor stator framework; and only a small gap is left between the motor stator and the PCB in the motor, so it is also difficult to directly weld the U, V, and W of the coil to the PCB, and problems such as poor contact due to improper welding, short circuit due to misplacement of welding, etc. may occur during the welding process. SUMMARY

[0005] In view of this, the present application provides a portable fan, by not arranging the driving circuit board between the base and the stator, the electrical connection between the lead of the coil and the driving circuit board is more simple and convenient, at the same time, the space between the base and the stator can be further reduced, so that the internal space distribution of the portable fan is more reasonable, thereby realizing the miniaturization of the portable fan.

[0006] The application provides a portable fan, comprising: a shell, including a cylindrical air outlet part, the air outlet part is provided with an air inlet, a containing cavity and an air outlet which are communicated, the air outlet part further comprises a base and a hollow sleeve which protrudes from the base to the containing cavity; a fan assembly, which is accommodated in the air outlet part, the fan assembly comprises a hub and a plurality of fan blades which are arranged on the outer surface of the hub, a rotating shaft is fixed in the center of the inner side of the hub; a motor, comprising a stator and a rotor, the stator and the rotor are accommodated in the hub, the stator is sleeved on the outside of the sleeve, the stator comprises a coil, the rotor is arranged between the stator and the hub in the radial direction, the rotating shaft is inserted into the sleeve; a drive circuit board is not arranged between the base and the stator, the drive circuit board is electrically connected to the lead wire of the coil to drive the fan assembly to rotate, and wind is blown out from the air outlet after passing through the containing cavity from the air inlet.

[0007] Further, the shell comprises a front shell and a rear shell, the shell further comprises a pressurizing part arranged in the front shell, a plurality of connecting leaves connect the pressurizing part and the front shell, the pressurizing part is formed with the base and the sleeve, the base is located between the front end and the rear end of the pressurizing part and forms a space for accommodation in the rear of the pressurizing part, and the sleeve protrudes rearward from the base; the hub comprises an annular extension wall, the stator and the rotor are accommodated in the extension wall, and the extension wall, the stator and the rotor protrude forward into the space for accommodation.

[0008] Further, the base forms a containing part in the front of the pressurizing part, the drive circuit board is accommodated in the containing part, the front end of the pressurizing part further comprises a front cover, the front cover is arranged at the front end of the containing part, and the front cover is recessed rearward to form a negative pressure area.

[0009] Further, the stator and the rotor do not protrude forward beyond the extension wall.

[0010] Further, the hub comprises a wind guide surface which increases radially from rear to front, the extension wall protrudes forward beyond the wind guide surface, the pressurizing part comprises a pressurizing surface which increases radially from rear to front, and the wind guide surface and the pressurizing surface are arranged in close proximity.

[0011] Further, the shell comprises a front shell and a rear shell, the front shell comprises a first air shell and a first handheld shell, the rear shell comprises a second air shell and a second handheld shell, the first air shell and the second air shell form the air outlet part, the first handheld shell and the second handheld shell form a handheld part, and the drive circuit board is accommodated in the handheld part.

[0012] Further, the hand-held part is provided with a switch, an interface and a battery, the switch is connected to the driving circuit board, or the interface is connected to the driving circuit board, and the battery is electrically connected to the driving circuit board.

[0013] Further, the switch is a stepless speed regulating switch; the stepless speed regulating switch comprises a scroll wheel, and / or the scroll wheel is arranged directly below the air outlet to be rolled up and down by the thumb when aligned with the air outlet.

[0014] Further, the first air shell comprises a first outer shell and a first inner shell which are matched with each other, the first inner shell and the first outer shell are arranged in close contact, and the first inner shell and the first outer shell both extend horizontally forward; the second air shell comprises a second outer shell and a second inner shell which are matched with each other, the rear ends of the second inner shell and the second outer shell are spaced apart and connected by a connecting piece, the second outer shell extends horizontally forward, the second inner shell extends horizontally forward first and then extends radially outward from rear to front, the front end of the second inner shell is connected with the front end of the second outer shell, and the front end of the second inner shell abuts against the rear end of the first inner shell.

[0015] The application further provides a portable fan, wherein the motor is a three-phase motor, and the coil comprises twelve windings.

[0016] The application further provides a hand-held fan, which comprises a fan body and a handle connected with the fan body; the handle is internally provided with a control circuit board and a control part connected with the control circuit board; the hand-held fan further comprises a mistaken touch prevention button arranged on the handle, the mistaken touch prevention button is exposed on the handle, and the mistaken touch prevention button is used for preventing the hand-held fan from being started by mistake.

[0017] Compared with the prior art, the portable fan and the hand-held fan have the following beneficial effects: by arranging the driving circuit board not between the base and the stator, the electrical connection between the lead of the coil and the driving circuit board is more simple and convenient, meanwhile, the space between the base and the stator can be further reduced, so that the internal space distribution of the portable fan is more reasonable, thereby realizing the miniaturization of the portable fan. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of a first embodiment of the portable fan of the application;

[0019] Figure 2 is a sectional view of the first embodiment of the portable fan of the application;

[0020] Figure 3 is Figure 2 is an enlarged view of part A in FIG. 4;

[0021] Figure 4 is a cross-sectional view of a third embodiment of the portable fan of the present application;

[0022] Figure 5 is a perspective view of a handheld fan according to an embodiment of the present application;

[0023] Figure 6 is a perspective view of a handheld fan according to an embodiment of the present application from another angle;

[0024] Figure 7 is a perspective view of a partial structure according to an embodiment of the present application;

[0025] Figure 8 is an exploded view according to an embodiment of the present application;

[0026] Figure 9 is a schematic view of an air volume adjusting circuit according to an embodiment of the present application;

[0027] Figure 10 is a schematic view of an air volume adjusting circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure, features and effects of the present application, the portable fan of the present application will be further described in conjunction with the accompanying drawings and specific embodiments.

[0029] As shown in Figure 1 and Figure 2 , a schematic view of a first embodiment of the portable fan of the present application is shown. The portable fan comprises a housing 1, a fan assembly 2, a motor 3 and a driving circuit board 4. The housing 1 comprises a cylindrical air outlet portion 16, which is provided with an air inlet 161, a receiving cavity 162 and an air outlet 163 in communication with each other. The fan assembly 2, the motor 3 and the driving circuit board 4 are received in the housing 1. The driving circuit board 4 is electrically connected to the motor 3 to drive the fan assembly 2 to rotate, so that air is blown out from the air inlet 161, through the receiving cavity 162 and then from the air outlet 163.

[0030] As shown in Figure 1 and Figure 2 , a schematic view of a first embodiment of the portable fan of the present application is shown. The portable fan comprises a housing 1, a fan assembly 2, a motor 3 and a driving circuit board 4. The housing 1 comprises a cylindrical air outlet portion 16, which is provided with an air inlet 161, a receiving cavity 162 and an air outlet 163 in communication with each other. The fan assembly 2, the motor 3 and the driving circuit board 4 are received in the housing 1. The driving circuit board 4 is electrically connected to the motor 3 to drive the fan assembly 2 to rotate, so that air is blown out from the air inlet 161, through the receiving cavity 162 and then from the air outlet 163.As shown, the shell 1 includes a front shell 11 and a rear shell 12, the front shell 11 includes a first air shell 111 and a first handheld shell 112, the rear shell 12 includes a second air shell 121 and a second handheld shell 122, the first air shell 111 and the second air shell 121 form the air outlet part 16, and the first handheld shell 112 and the second handheld shell 122 form the handheld part 17. It should be understood that the first air shell 111 and the second air shell 121 can be front-to-back or left-to-right; the first handheld shell 112 and the second handheld shell 122 can be front-to-back or left-to-right. The handheld part 17 is provided with a switch 5, an interface 6 and a battery 7, and in this embodiment, the switch 5 is a stepless speed regulating switch 5. The stepless speed regulating switch 5 includes a roller, and / or the roller is arranged directly below the air outlet 163 to be rolled up and down by the thumb when aligned with the air outlet 163. Of course, in other embodiments, the first handheld shell 112 and the second handheld shell 122 can not be provided, or can be provided as a desktop fan, a neck-hanging fan, a clip fan, a support fan, and other common forms.

[0031] As shown, Figure 2 The first air shell 111 includes a first outer shell and a first inner shell that fit inside and outside, the first inner shell and the first outer shell are arranged in close contact, and the first inner shell and the first outer shell extend horizontally forward. The second air shell 121 includes a second outer shell and a second inner shell that fit inside and outside, the rear ends of the second inner shell and the second outer shell are spaced apart and connected by a connecting piece, the second outer shell extends horizontally forward, the second inner shell extends horizontally forward first and then radially outward from rear to front, the front end of the second inner shell is connected with the front end of the second outer shell, and the front end of the second inner shell abuts against the rear end of the first inner shell. In this embodiment, the first outer shell and the second outer shell are integrally formed, and of course in other embodiments, the first outer shell and the second outer shell can also be separately formed. The first air shell 111 and the second air shell 121 are both double-layer shell 1 structures, which are more stable in structure, and the shape change of the second inner shell is beneficial to pressurizing the air, making the wind power stronger and the air outlet distance farther. Of course, in other embodiments, the first air shell 111 and / or the second air shell 121 can also be a single-layer shell 1 structure.

[0032] As shown, Figure 1 And Figure 2As shown, the shell 1 further comprises a pressurizing member 13 arranged in the first air shell 111, and a plurality of connecting blades 14 connecting the pressurizing member 13 and the front shell 11. The pressurizing member 13 is formed with a base 131 and a sleeve 132. The base 131 is located between the front end and the rear end of the pressurizing member 13, and forms a space 1321 in the pressurizing member 13 towards the rear. The base 131 forms a receiving portion 1322 in the pressurizing member 13 towards the front. The sleeve 132 protrudes from the base 131 towards the receiving cavity 162, i.e. the sleeve 132 protrudes from the base 131 towards the rear, and the sleeve 132 is hollow.

[0033] As shown in Figure 1 and Figure 2 The air inlet 161 is located in the radially inner region of the second inner shell, and the air outlet 163 is located in the region between the pressurizing member 13 and the first inner shell in the radial direction. The fan assembly 2 comprises a hub 21, and a plurality of fan blades 22 arranged at intervals on the outer surface of the hub 21. The hub 21 comprises a guide surface 212 that increases in the radial direction from the rear to the front. The pressurizing member 13 comprises a pressurizing surface 133 that increases in the radial direction from the rear to the front. The guide surface 212 and the pressurizing surface 133 are arranged in close proximity to each other, so that the air flows smoothly forward. From the air inlet 161 to the air outlet 163, a radial outward air channel is formed, so that the air is pressurized in the shell 1, and a larger air outlet surface is formed.

[0034] As shown in Figure 1 The fan assembly 2 comprises the hub 21, and a plurality of fan blades 22 arranged at intervals on the outer surface of the hub 21. A rotating shaft 23 is fixed in the center of the inner side of the hub 21. The motor 3 comprises a stator 31 and a rotor 32, both of which are accommodated in the hub 21. Further, the hub 21 comprises an annular extension wall 211, and the stator 31 and the rotor 32 are accommodated in the extension wall 211. The stator 31 is sleeved on the outside of the sleeve 132, and comprises a coil 311. The rotor 32 is arranged in the radial direction between the stator 31 and the hub 21. The rotating shaft 23 is inserted into the sleeve 132, and the extension wall 211, the stator 31 and the rotor 32 protrude forward into the space 1321.

[0035] As shown in Figure 1 and Figure 2As shown, the extension wall 211 protrudes forward beyond the air guide surface 212, the air guide surface 212 and the pressurizing surface 133 are closely spaced, thus the gap between the air guide surface 212 and the pressurizing surface 133 is staggered with the front end of the extension wall 211, so that dust and dirt are not easily accumulated in the extension wall 211. The stator 31 and the rotor 32 do not protrude forward beyond the extension wall 211, and the extension wall 211, the stator 31 and the rotor 32 protrude forward into the accommodation space 1321, so that part of the extension wall 211, the stator 31 and the rotor 32 are accommodated in the accommodation space 1321.

[0036] As shown in Figure 1 and Figure 2 As shown, the driving circuit board 4 is not arranged between the base 131 and the stator 31, the battery 7 is electrically connected to the driving circuit board 4, and the driving circuit board 4 is electrically connected to the lead of the coil 311 to drive the fan assembly 2 to rotate, so that air is blown out from the air inlet 161 through the accommodating cavity 162 and then from the air outlet 163. In this embodiment, the driving circuit board 4 is accommodated in the accommodating portion 1322 formed forwardly in the base 131, and the front end of the pressurizing member 13 further comprises a front cover 15 arranged at the front end of the accommodating portion 1322, and the front cover 15 is recessed rearwardly to form a negative pressure area 151. By arranging the front cover 15, on the one hand, the accommodating portion 1322 is covered to shield and protect the driving circuit board 4; on the other hand, the negative pressure area 151 formed by the rearward recess of the front cover 15 can compensate air at the air outlet 163 to increase the air volume of the air outlet 163.

[0037] As shown in Figure 1 In this embodiment, the motor 3 is a three-phase motor, and the coil 311 comprises twelve windings, so that the internal space of the motor 3 is limited. By arranging the driving circuit board 4 not between the base 131 and the stator 31, the electrical connection between the lead of the coil 311 and the driving circuit board 4 is more simple and convenient, and the space between the base 131 and the stator 31 can be further reduced, so that the internal space distribution of the portable fan is more reasonable, thereby realizing the miniaturization of the portable fan.

[0038] The second embodiment of the portable fan of the present application. The main difference from the first embodiment is that the driving circuit board 4 is accommodated in the handheld portion 17 and located between the switch 5 and the interface 6, and the switch 5 is connected to the driving circuit board 4 or the interface 6 is connected to the driving circuit board 4. Other structures and performances are basically the same as those of the first embodiment, and will not be described here.

[0039] AsFigure 4 The third embodiment of the portable fan is shown in the schematic view. The main difference from the first embodiment is that the driving circuit board 4 is housed in the hand-held portion 17 and is located below the battery 7. The other structure and performance are basically the same as the first embodiment, and will not be described here.

[0040] Referring to Figures 5 to 9 , the schematic view of the portable fan is shown.

[0041] Referring to Figure 5 , Figure 7 and Figure 8 , the portable fan 100' includes a fan body 1', a handle 2' connected to the fan body 1', a control circuit board inside the handle 2', a control portion 21' connected to the control circuit board, the control portion 21' is embedded in the handle 2' and partially exposed from the handle 2', the control portion 21' includes a roller key 211' and a spring connected to the roller key, the air volume of the portable fan 100' is adjusted by rolling the roller key 211', and the working state of the portable fan 100' is adjusted by pressing the roller key 211'.

[0042] In an implementable embodiment, referring to Figure 5 , Figure 7 and Figure 8 , the control portion 21' further includes a bearing 212', a rotating shaft 213' connected to the inner ring of the bearing 212', and a roller rotation encoder 214' connected to the rotating shaft 213', the outer ring of the bearing 212' is connected to the roller key 211', and the control circuit board is provided with an air volume adjusting circuit, the air volume adjusting circuit is connected to the roller rotation encoder 214' to realize stepless speed adjustment of the air volume of the portable fan 100'. The roller rotation encoder 214' is installed on the control circuit board, when the roller key 211' rolls, the rotating shaft 213' rotates around the central axis, and the digital signal is output through the roller rotation encoder 214', the digital signal is processed through the control circuit board to realize stepless speed adjustment of the air volume of the portable fan 100'.

[0043] In an implementable embodiment, referring to Figure 6 and Figure 8, the rotating shaft 213' is connected with a spring (not shown in the figure), and a switch control circuit is arranged on the control circuit board, and the scroll wheel button 211' is connected with the switch control circuit through the spring. Alternatively, the control circuit board is arranged vertically, and the spring is arranged in the contact on the control circuit board, and the spring is used for resetting the scroll wheel button 211'. In another implementable embodiment, when the scroll wheel button 211' is pressed, the switch control circuit is turned on, and the handheld fan 100' starts to work. At this time, the scroll wheel button 211' can be used to steplessly adjust the air volume of the handheld fan 100'. When the scroll wheel button 211' is used to steplessly adjust the air volume of the handheld fan 100', the scroll wheel button 211' is pressed, the switch control circuit is turned off, and the handheld fan 100' stops working. In the above manner, the safety of the handheld fan 100' can be improved, the energy consumption can be reduced, and the loss caused by the mistaken opening, touching and pressing can be reduced.

[0044] In an implementable embodiment, please refer to Figure 8 , the bearing 212' includes a main body part 2121' and annular parts 2122' located at opposite sides of the main body part 2121', and a containing cavity is formed in the middle of the annular part 2122', and the containing cavity is used for containing the scroll wheel button 211'. Alternatively, the scroll wheel button 211' is a tire-shaped part, which includes front and back two parallel circular end faces, and an annular peripheral surface connected with the periphery of the circular end faces, and a plurality of arc-shaped grooves are uniformly distributed in the circumferential direction of the annular peripheral surface. The arc-shaped grooves are arranged to facilitate the user to roll the scroll wheel button 211' and improve the user experience. Alternatively, the diameter of the annular part is slightly larger than the diameter of the scroll wheel button 211', which can well protect the scroll wheel button 211' and prolong the service life of the scroll wheel button 211'.

[0045] In an implementable embodiment, please refer to Figure 5 and Figure 7 , the handle 2' is internally provided with a battery compartment 22', the battery compartment 22' is internally used for accommodating a storage battery 221', and the control circuit board is connected with the storage battery 221'. Alternatively, the storage battery 221' is a rechargeable battery, which further improves the convenience and mobility of the handheld fan 100'.

[0046] In an implementable embodiment, please refer to Figure 5 , Figure 8 and Figure 9 , the scroll wheel rotation encoder 214' includes a first output end 2141' and a second output end 2142', the air volume adjusting circuit includes a first adjusting module 201' and a second adjusting module 202', the first output end 2141' is connected with the first adjusting module 201', the second output end 2142' is connected with the second adjusting module 202', and the first adjusting module 201' and the second adjusting module 202' are both connected with the positive electrode of the storage battery 221'.

[0047] Further, please refer toFigure 8 、 Figure 9 and Figure 10 The first adjusting module 201' includes a first capacitor C1, a first resistor R1, and a second resistor R2; the second adjusting module 202' includes a second capacitor C2, a third resistor R3, and a fourth resistor R4. The first output end 2141' of the scroll wheel rotation encoder 214' is connected to one end of the first resistor R1 and one end of the second resistor R2, the other end of the first resistor R1 is connected to one end of the first capacitor C1, the other end of the second resistor R2 is connected to the positive electrode of the battery 221', and the other end of the first capacitor C1 is grounded. The second output end 2142' of the scroll wheel rotation encoder 214' is connected to one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the third resistor R3 is connected to the positive electrode of the battery 221', the other end of the fourth resistor R4 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded. The third output end 2143' of the scroll wheel rotation encoder 214' is grounded. Through the scroll wheel rotation encoder 214', the scroll wheel key 211' can generate a plurality of different digital signals, and then the speed of the handheld fan 100' is steplessly controlled according to the plurality of different digital signals, thereby improving the user experience of the user.

[0048] In an implementable embodiment, please refer to Figure 5 、 Figure 6 and Figure 8 The handheld fan 100' further includes an anti-misoperation key 215' arranged on the handle 2', the anti-misoperation key 215' is exposed on the handle 2', and the anti-misoperation key 215' is used to prevent the handheld fan 100' from being started by mistake. Optionally, the anti-misoperation key 215' is a key switch or a toggle switch. In another implementable embodiment, after the toggle anti-misoperation key is toggled and the scroll wheel key 211' is pressed, the handheld fan 100' starts to work, at this time, the scroll wheel key 211' can be used to steplessly adjust the air volume of the handheld fan 100' by rolling. Through the double starting mode of toggling the anti-misoperation key 215' and pressing the scroll wheel key 211', the handheld fan 100' is prevented from being started by other objects pressing the scroll wheel key 211', thereby further improving the safety, energy saving, and environmental protection of the handheld fan 100'.

[0049] In an implementable embodiment, please refer to Figure 5 、 Figure 6 and Figure 8The anti-mispressing button 215' is located below the fan body 1', and the anti-mispressing button 215' and the scroll wheel button 211' are located on opposite sides of the handle 2'. Alternatively, the scroll wheel button 211' and the anti-mispressing button 215' are located below the handle 2' and are located at the upper part of the middle of the handle 2', which is more in line with the use habits of the human body and improves the user experience. The anti-mispressing button 215' and the scroll wheel button 211' are arranged on opposite sides of the handle 2', which can prevent the scroll wheel button 211' from being pressed by other objects and the anti-mispressing button 215' from being mispressed by the same side object, thereby preventing the handheld fan 100' from being misstarted.

[0050] In an implementable embodiment, referring to Figure 5 and Figure 8 The surface of the handle 2' is provided with a second opening 24' for exposing the scroll wheel button 211', and the second opening 24' is embedded with a mounting plate 241', and the scroll wheel button 211' is exposed outside the second opening 24' through the mounting plate 241'. Alternatively, the shape of the mounting plate 241' is matched with the scroll wheel button 211'.

[0051] In an implementable embodiment, referring to Figure 5 and Figure 6 The surface of the handle 2' is provided with a first opening 23' for exposing the anti-mispressing button 215'. Alternatively, the shape of the first opening 23' is matched with the anti-mispressing button 215', and the anti-mispressing button 215' is exposed outside the handle 2' through the first opening 23'. Alternatively, the bottom of the handle 2' is further provided with a hanging rope hole 25' for installing a hanging rope or a hanging rope decoration, which facilitates the taking and placing of the handheld fan 100' and improves the appearance of the handheld fan 100'. Alternatively, the hanging rope hole 25' is located on the same side of the first opening 23'.

[0052] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present disclosure.

[0053] 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, so that any equivalent technical changes made according to the content of the present disclosure and drawings are included in the patent scope of the present application.

Claims

1. A portable fan characterized by, It includes: The shell includes a cylindrical air outlet, which is provided with an air inlet, a receiving cavity and an air outlet connected in sequence, and further includes a base and a hollow sleeve protruding from the base to the receiving cavity; The fan assembly is accommodated in the air outlet, which includes a hub and a plurality of fan blades arranged at intervals on the outer surface of the hub, and a rotating shaft fixed to the inner side of the hub; The motor includes a stator and a rotor, both of which are accommodated in the hub, the stator is sleeved outside the sleeve, the stator includes a coil, the rotor is arranged between the stator and the hub in the radial direction, and the rotating shaft is inserted into the sleeve; The drive circuit board is not arranged between the base and the stator, the drive circuit board is electrically connected to the lead wire of the coil to drive the fan assembly to rotate, and wind is blown out from the air outlet through the receiving cavity from the air inlet.

2. The portable fan of claim 1, wherein: The shell includes a front shell and a rear shell, and further includes a pressurizing member arranged in the front shell, a plurality of connecting leaves connecting the pressurizing member and the front shell, the base and the sleeve are formed in the pressurizing member, the base is located between the front end and the rear end of the pressurizing member and forms a space in the pressurizing member, and the sleeve protrudes rearward from the base; the hub includes an annular extension wall, the stator and the rotor are accommodated in the extension wall, and the extension wall, the stator and the rotor protrude forward into the space.

3. The portable fan of claim 2, wherein: The base forms a receiving portion in the pressurizing member, the drive circuit board is accommodated in the receiving portion, the front end of the pressurizing member further includes a front cover, the front cover covers the front end of the receiving portion, and the front cover is recessed rearward to form a negative pressure area.

4. The portable fan of claim 2, wherein: The stator and the rotor do not protrude forward beyond the extension wall.

5. The portable fan of claim 2, wherein: The hub includes a wind guide surface that increases in the radial direction from rear to front, the extension wall protrudes forward beyond the wind guide surface, the pressurizing member includes a pressurizing surface that increases in the radial direction from rear to front, and the wind guide surface and the pressurizing surface are arranged in close proximity.

6. The portable fan of claim 1, wherein: The shell includes a front shell and a rear shell, the front shell includes a first air shell and a first handheld shell, the rear shell includes a second air shell and a second handheld shell, the first air shell and the second air shell form the air outlet, the first handheld shell and the second handheld shell form a handheld portion, and the drive circuit board is accommodated in the handheld portion.

7. The portable fan of claim 6, wherein: The handheld portion is provided with a switch, an interface and a battery, the switch is connected to the drive circuit board, or the interface is connected to the drive circuit board, and the battery is electrically connected to the drive circuit board.

8. The portable fan of claim 7, wherein: The switch is a stepless speed regulation switch. The stepless speed regulating switch comprises a roller, and / or the roller is arranged directly below the air outlet to roll up and down the roller by the thumb when aiming at the air outlet.

9. The portable fan of claim 6, wherein: The first air shell comprises a first outer shell and a first inner shell which are matched with each other, the first inner shell and the first outer shell are arranged in close contact, and the first inner shell and the first outer shell both extend horizontally forward; the second air shell comprises a second outer shell and a second inner shell which are matched with each other, the rear ends of the second inner shell and the second outer shell are spaced apart and connected by a connecting piece, the second outer shell extends horizontally forward, the second inner shell extends horizontally forward first and then extends radially outward from rear to front, the front end of the second inner shell is connected with the front end of the second outer shell, and the front end of the second inner shell abuts against the rear end of the first inner shell.

10. The portable fan of any one of claims 1-9, wherein: The motor is a three-phase motor, and the coil comprises twelve windings.

11. A handheld fan, comprising: The handheld fan comprises: a fan body and a handle connected with the fan body; a control circuit board and a control part connected with the control circuit board are arranged inside the handle; The handheld fan further comprises an anti-misoperation key arranged on the handle, the anti-misoperation key is exposed on the handle, and the anti-misoperation key is used to prevent the handheld fan from being started by mistake.

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