Portable bladeless fan

Abstract

The application provides a portable bladeless fan, comprising: a shell, a first air inlet being arranged at the back side of the shell, a first air outlet being arranged at the front side of the shell, the first air inlet and the first air outlet being communicated in the shell; a pressurizing part being connected to the front side of the shell, the pressurizing part comprising a front end face, the front end face being located at the back of the first air outlet in the axial direction, the front end face being provided with a first matching structure; a mixed flow fan being located in the shell and connected to the back side of the pressurizing part, the mixed flow fan rotating around a rotating shaft to generate airflow; a fixing part being used for fixing the portable bladeless fan to an external object, the fixing part comprising a second matching structure, the second matching structure and the first matching structure being matched to enable the fixing part to be detachably fixed to the front end face; wherein the mixed flow fan and the pressurizing part form a pressurized flow channel with the shell, air enters the pressurized flow channel from the first air inlet, and the air is discharged from the first air outlet after forming pressurized mixed flow in the pressurized flow channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan, in particular to a portable bladeless fan with large air volume, large air pressure and capable of meeting various use scenarios. BACKGROUND

[0002] The common fan in daily life is an axial fan, which has the characteristic that the path of the air from the air inlet to the air outlet does not deviate radially, and is basically equivalent to straight in and straight out. The air enters the axial fan axially from the air inlet end and then exits axially from the air outlet end. This way has small wind resistance, and thus small air volume loss. That is, under the default condition, the person skilled in the art will use an axial fan blade to manufacture an axial fan if he wants to ensure small air volume loss. Over time, this forms a consensus and a difficult-to-change technical bias. As a result, the person skilled in the art has no idea to solve this technical problem. Under the default condition, using an axial fan will not go wrong, and the investment in research and development is small, the cost is low, and the fan product can be quickly sold to exchange profits in the capital market.

[0003] Moreover, the present inventor has found that some portable fans use centrifugal fan blades to overcome the difficulty of low air pressure, but the air enters the centrifugal fan axially from the air inlet end and then exits radially from the air outlet end. The air direction changes greatly, the air volume loss is very serious, and the air outlet effect is difficult to meet the user's requirements.

[0004] It is a technical difficulty in the art to design a structure with large air volume and large air pressure on a small portable fan. In addition to achieving large air volume and large air pressure on a portable fan, it is also necessary to consider how to achieve stable use when the portable fan is fixed to an external object (such as a table top). The existing portable fan usually fixes the portable fan by adding a base component. However, since the base does not always follow the portable fan, the base is often lost or missing. When it is necessary to be fixed to an external object next time, the support of the lost base is lost, and the back pressure formed by the large air volume and the large air pressure is difficult to be guaranteed to be stable by the portable fan itself, so the scene of stable use when fixed to an external object is lost. SUMMARY

[0005] In view of this, the present application provides a portable bladeless fan, which is fixed to the front end of the pressurizing member by a fixing member, so that the fixing member can be carried together with the portable bladeless fan, and various use scenarios of the portable bladeless fan by the user are met.

[0006] The application provides a portable bladeless fan, comprising: a shell, a first air inlet being arranged at the rear side of the shell, a first air outlet being arranged at the front side of the shell, the first air inlet and the first air outlet being communicated in the shell; a pressurizing member, connected to the front side of the shell; a mixed flow fan, arranged in the shell and connected to the rear side of the pressurizing member, the mixed flow fan rotates around a rotation shaft to generate airflow; a fixing member, used for fixing the portable bladeless fan to an external object, the fixing member is detachably fixed to the front end of the pressurizing member; wherein the mixed flow fan and the pressurizing member form a pressurized flow channel with the shell, air enters the pressurized flow channel from the first air inlet, and is discharged from the first air outlet after forming a pressurized mixed flow in the pressurized flow channel.

[0007] Further, the mixed flow fan comprises a rotating seat which increases radially from an air inlet end to an air outlet end, the pressurizing member comprises a pressurizing seat which increases radially from the air inlet end to the air outlet end, the rotating seat and the pressurizing seat increase integrally in the radial direction, the rotating seat and the pressurizing seat form the pressurized flow channel with the shell, the axial length of the rotating seat at the front and rear ends is 1-1.5 times the axial length of the pressurizing seat at the front and rear ends; the pressurizing seat is concave at the air outlet end to form a cavity, the first air outlet is located radially outside the cavity, the area in the cavity forms a first high negative pressure area, the shape of the fixing member matches the shape of the cavity to form a second high negative pressure area, the fixing member is entirely accommodated in the cavity to achieve the same air outlet effect of the fixing member in the state of fixing the portable bladeless fan to an external object and being accommodated in the cavity.

[0008] Further, the cavity comprises an end face located at the rear, and a peripheral wall connected to the end face and located in the radial direction, the end face is located at the rear of the first air outlet in the axial direction; the fixing member comprises a seat portion and a fixing portion protruding from the surface of the seat portion, the fixing portion is used for fixing the portable bladeless fan, the seat portion comprises a center portion and an edge portion connected to the center portion, the edge portion is bent and extends from the center portion to the opposite direction of the protruding direction of the fixing portion, the center portion matches the end face, and the edge portion matches the peripheral wall, so that the fixing member is entirely accommodated in the cavity.

[0009] Further, the center part and the edge part form a semi-open receiving part, the receiving part is used for the IP image article arranged in a detachable manner, the IP image article is wholly received in the receiving part, so as to realize the multiplexing of the fixing function and the decoration function of the fixing member; or, the receiving part is used for receiving a USB wire harness, the USB wire harness is wholly received in the receiving part, so as to realize the multiplexing of the fixing function and the receiving function of the fixing member; or, the receiving part is used for receiving a spraying member, the spraying member is wholly received in the receiving part, so as to realize the multiplexing of the fixing function and the humidifying function of the fixing member.

[0010] Further, the second air inlet part is arranged on the radial outer side of the shell, and the second air outlet part is arranged on the radial inner side of the cavity, and the pressurizing member further comprises a plurality of connecting members connecting the pressurizing seat and the shell, at least part of the connecting members are connected to the shell and hollowly form a negative pressure channel, the negative pressure channel is communicated with the second air inlet part and the second air outlet part, so as to continuously air supplement the first high negative pressure area or the second high negative pressure area through the negative pressure channel, thereby reducing the airflow pulling and interference of the pressurized mixed flow, making the air outflow stable and increasing the air volume and the air supply distance.

[0011] Further, the fixing member is correspondingly provided with a ventilation opening, the ventilation opening is communicated with the second air outlet part, and the second high negative pressure area is continuously air supplemented through the negative pressure channel, so as to realize the air outflow effect of the fixing member in the two states of being fixed to an external object and being received in the cavity.

[0012] Further, the fixing member comprises a seat part and a fixing part protruding from the surface of the seat part, the fixing part is used for being fixed to the portable bladeless fan, the seat part comprises a center part and an edge part connected to the center part, the edge part is bent and extended from the center part to the opposite direction of the protruding direction of the fixing part, the center part and the edge part form a semi-open receiving part, and the receiving part is used for receiving a device; wherein the device received in the receiving part is correspondingly arranged on the center part, the center part is arranged close to the edge part and / or the edge part is correspondingly provided with a ventilation opening communicated with the second air outlet part, and the ventilation opening and the device have a spacing, so as to realize the multiplexing of the fixing function, the receiving function and the negative pressure air guiding function of the fixing member.

[0013] Further, a holding member is arranged outside the shell, the holding member comprises a seat and a fixing part protruding from the surface of the seat, when the fixing part is matched with the holding member, the portable bladeless fan is fixed to an external plane, the maximum radial cross-sectional area of the seat is larger than that of the holding member; or, the seat is provided with a suction cup to adsorb the portable bladeless fan to an external object; or, the seat is provided with a hook or a hanging rope to hang the portable bladeless fan to an external object.

[0014] Further, a handle is arranged below the shell, the handle is the holding member, the shape of the fixing part is matched with that of the bottom of the handle, when the fixing member is fixed to the bottom of the handle, the portable bladeless fan is fixed to an external plane.

[0015] Further, the portable bladeless fan is a handheld bladeless fan provided with a handle, a clamping fan provided with a clamp, a changeable fan provided with a curved shaping member for winding, a desktop fan provided with a support, or a floor fan provided with a telescopic support.

[0016] Compared with the prior art, the portable bladeless fan has the following beneficial effects: a large air volume and a large air pressure are realized through the pressurized flow guide channel, then the fixing member is detachably fixed to the front end of the pressurizing member, when the portable bladeless fan does not need to be fixed to an external object, the fixing member is fixed to the front end of the pressurizing member, and the fixing member can be carried together with the portable bladeless fan; when the portable bladeless fan needs to be fixed to an external object, the fixing member can be detached from the front end of the pressurizing member. The situation that the fixing member is lost is avoided, and the normal and stable use of the user in various use scenarios is met. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the first state of the fixing member of the portable bladeless fan of the present application;

[0018] Figure 2 is a perspective view of the second state of the fixing member of the portable bladeless fan of the present application;

[0019] Figure 3 is Figure 2 is a perspective exploded view of the portable bladeless fan in one angle of the present application;

[0020] Figure 4 is Figure 2 is a perspective exploded view of the portable bladeless fan in another angle of the present application;

[0021] Figure 5 is a partial sectional view of the portable bladeless fan of the present application;

[0022] Figure 6 is a schematic diagram of the rotating seat and the pressurizing seat of the portable bladeless fan of the present application;

[0023] Figure 7 is a left view of the portable bladeless fan of the present application when the transparent display of the shell is hidden;

[0024] Figure 8 is a front-to-back sectional view of the portable bladeless fan of the present application;

[0025] Figure 9 is a partial rear view of the portable bladeless fan of the present application when the transparent display of the shell is hidden. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure, features and effects of the present application, the present application will be further described in conjunction with the drawings and specific embodiments.

[0027] In order to more conveniently understand the technical solutions of the present application, the direction of the X-axis in the three-dimensional coordinate axis in the drawings of the specification is defined as the left-right direction, the Y-axis is defined as the front-rear direction, and the Z-axis is defined as the up-down direction. The air, wind, airflow and fluid in the present application all refer to gas.

[0028] Reference Figures 1 to 4 , Figure 1 and Figure 2 is a perspective view of the portable bladeless fan 100 of the present application, Figure 3 and Figure 4 are two different angle exploded views of the portable bladeless fan 100 of the present application.

[0029] Reference Figure 1 and Figure 2The portable bladeless fan 100 includes a holding member 19 outside the housing 1. In this embodiment, the portable bladeless fan 100 is a handheld bladeless fan, which is provided with a handle (not labeled, the same below) for a user to hold. The handle is the holding member 19. Of course, the portable bladeless fan 100 can also be a clip fan provided with a clip, a versatile fan provided with a curved shaping member for winding, a desktop fan provided with a support, or a floor fan provided with a telescopic support. Correspondingly, the holding member 19 can be a clip, a curved shaping member, a support, or a telescopic support, without being limited thereto. A semiconductor refrigeration member (not shown, the same below) can be provided on the handle. The user can carry the portable bladeless fan 100 with the semiconductor refrigeration member, which can automatically adjust the refrigeration temperature according to the temperature of the part contacted by the user, thereby improving the comfort of the user carrying. It should be understood that the portable bladeless fan 100 is used for heat dissipation and cooling. The handle is provided with a semiconductor refrigeration member, thereby improving the comfort of the user carrying. Of course, a heating element (not shown) can also be added to the portable bladeless fan 100, which can be used for heat preservation and warming. Correspondingly, a warm member (not shown) can be provided on the handle to automatically adjust the temperature of the part contacted by the human body, thereby warming the part contacted by the human body and improving the comfort of the user carrying.

[0030] In combination Figure 3 and Figure 4 In this embodiment, a battery (not labeled, the same below) can be accommodated in the handle. A switch button (not labeled, the same below) and a charging port (not shown, the same below) can be externally provided on the handle. The battery supplies power to the portable bladeless fan 100. The switch button is used to adjust the wind speed and turn on / off. The charging port is used to charge the battery by an external power supply. When the portable bladeless fan 100 is in other forms (for example, the clip fan, the versatile fan, the desktop fan, etc. mentioned above), the positions of the battery, the switch button, and the charging port can be adjusted correspondingly. Of course, in order to pursue a more lightweight, the battery can also not be provided in the portable bladeless fan 100. The portable bladeless fan 100 can also be realized by connecting an external mobile power supply through a setting interface (not shown).

[0031] Reference Figures 1 to 4The portable bladeless fan 100 comprises a housing 1, a pressurizing member 3, a mixed-flow fan 2 and a fixing member 4. The radial cross-sections of the housing 1, the pressurizing member 3, the mixed-flow fan 2 and the fixing member 4 are generally circular in shape, but the housing 1, the pressurizing member 3, the mixed-flow fan 2 and the fixing member 4 can also be of other shapes, without being limited thereto. The pressurizing member 3 is connected to the front side of the housing 1, and the pressurizing member 3 and the housing 1 are integrally formed, but the pressurizing member 3 and the housing 1 can also be separately formed, and then the pressurizing member 3 is installed on the housing 1, without being limited thereto. The mixed-flow fan 2 is connected to the rear side of the pressurizing member 3 and located in the housing 1, and the mixed-flow fan 2 rotates around the rotation shaft 24 to generate airflow. The fixing member 4 is used to fix the portable bladeless fan 100 to external objects, and the fixing member 4 is detachably fixed to the front end of the pressurizing member 3. The fixing manner between the fixing member 4 and the pressurizing member 3 can be buckling, adsorption, etc., without being limited thereto. When the portable bladeless fan 100 does not need to be fixed to external objects, the fixing member 4 is fixed to the front end of the pressurizing member 3, and the fixing member 4 can be carried together with the portable bladeless fan 100; when the portable bladeless fan 100 needs to be fixed to external objects, the fixing member can be detached from the front end of the pressurizing member 3. The situation that the fixing member 4 is lost is avoided, and the normal and stable use of the user in various use scenarios is met. The air inlet end R of the portable bladeless fan 100 is located at the rear end, the air outlet end F is located at the front end, the extension direction perpendicular to the rotation shaft 24 and passing through the rotation shaft 24 is the radial direction, and the direction parallel to the rotation shaft 24 is the axial direction.

[0032] Reference Figure 3 , Figure 4 , Figure 5 and Figure 7The diameter of the largest radial section of the shell 1 is 2-2.2 times the length of the front and rear ends of the shell 1, so as to make the portable bladeless fan 100 thin and light, and compared with the small air outlet area of the existing handheld fan on the market, the portable bladeless fan 100 of the application has a larger air outlet area under the premise of ensuring air volume and air pressure. When the user uses it (such as handheld or standing on a plane), the fan of the application can contact more parts of the user at the same distance, and the blowing effect is better. The rear side of the shell 1 is provided with an air inlet plate 13, the air inlet plate 13 is provided with a first air inlet part 14, the front side of the shell 1 is connected with the pressure device 3, the pressure device 3 and the shell 1 form a first air outlet part 15 between the radial direction close to the air outlet end F, and the first air inlet part 14 and the first air outlet part 15 are connected in the shell 1. On the rear side of the air inlet plate 13, a cover plate 16 is fixed, the cover plate 16 is provided with air holes 161, the size of the air holes 161 is smaller than the size of the first air inlet part 14, so as to avoid the fingers or other foreign matters from entering the shell 1 from the first air inlet part 14, and improve the safety of use. The cover plate 16 and the air inlet plate 13 have a distance, and at least part of the air inlet plate 13 is concave forward, and at least part of the cover plate 16 is concave backward, so as to increase the air inlet path between the air inlet plate 13 and the cover plate 16 in the radial direction under the condition that the size of the air holes 161 on the cover plate 16 is small, and the size of the first air inlet part 14 is large, so the air volume will not be affected by the cover plate 16 with small size air holes 161. The shell 1 is further divided into a front and rear matched first shell 11 and a second shell 12, the first shell 11 and the second shell 12 are fixed to each other by a fixed structure, the mixed flow fan 2 is basically correspondingly arranged in the first shell 11 in the radial direction, and the pressure device 3 is basically correspondingly arranged in the second shell 12 in the radial direction. The length ratio of the front and rear ends of the first shell 11 to the front and rear ends of the second shell 12 is 1-1.5, which can balance the relationship between air volume and air pressure while realizing thinness.

[0033] Reference Figure 3 , Figure 5 , Figure 8 and Figure 9The mixed flow fan 2 comprises a rotating seat 21 and a plurality of blades 22. The rotating seat 21 comprises a guide surface 211 radially increasing from the air inlet end R to the air outlet end F. The plurality of blades 22 are connected and equidistantly arranged on the guide surface 211. Each blade comprises a blade root 221 connected with the guide surface 211 and a blade tip 222 away from the guide surface 211. The blades 22 helically extend at a predetermined angle from the air inlet end R to the air outlet end F along the circumference of the guide surface 211. From the air inlet end R to the air outlet end F, any two adjacent blades 22 have a first interval J1 at the air inlet end R and a second interval J2 at the air outlet end F. The ratio of the first interval J1 to the second interval J2 ranges from 0.5 to 0.9, which is conducive to increasing the air inlet volume. Figure 3 The rotating seat 21 is substantially in the shape of a truncated cone. The radial cross-sectional area of the rotating seat 21 at the air inlet end R is smaller than that at the air outlet end F. The rotating seat 21 has a relatively large radial cross-section at the air outlet end F. The rotating seat 21 is concave at the air outlet end F to form a receiving portion 23 for accommodating components such as a motor. The motor used in the mixed flow fan 2 is an outer rotor brushless motor 25, which has a service life of 15,000 hours and no electric spark generated during operation, thereby greatly reducing the interference of electric spark on remote radio equipment. The brushless motor has greatly reduced friction and smooth operation, and good noise reduction effect. The connection structure of the mixed flow fan 2 and the pressurizing member 3 is also accommodated in the receiving portion 23, which makes good use of space. The rotating shaft 24 protrudes forward from the rear wall of the receiving portion 23, and the rear side of the pressurizing member 3 protrudes rearward to form a protruding column 33. The rotating shaft 24 is fixed to the protruding column 33. At the same time, the outer rotor brushless motor 25 is accommodated in the receiving portion 23 of the rotating seat 21 to realize mutual isolation of the rotating seat 21 and the pressurizing member 3.

[0034] Reference Figure 3 , Figure 5 and Figure 7 The air inlet plate 13 and the rear end of the rotating seat 21 have a safe pressure receiving distance D1 to allow the air inlet plate 13 to have maximum pressure deformation within the pressure range allowed by the material performance. The distance between the air inlet plate 13 and the rear end of the rotating seat 21 is 4.0-4.5 mm (mm, the same below), so as to have space for large air volume to enter at the air inlet end R, and at the same time have space for the air inlet plate 13 to have maximum pressure deformation when subjected to large air volume. Reference Figure 9The radial cross-sectional area of the air inlet plate 13 is greater than or equal to the maximum radial cross-sectional area of the rotating seat 21 to ensure sufficient air intake and achieve noise reduction, so as to convert sharp noise into low-pitched noise. The radial cross-sectional area of the air inlet plate 13 is less than or equal to the area of the air inlet window 2221 formed by the blade tip portion 222 at the air inlet end R, so that the air inlet window 2221 formed by the blade tip portion 222 at the air inlet end R starts to form a larger air pressure. In this embodiment, the radial cross-sectional radius of the air inlet plate 13 is 27.7 mm, and the radial cross-sectional radius of the rear end of the rotating seat 21 is 15.5 mm, of course, not limited thereto. In addition, the radial cross-sectional area of the air inlet plate 13 is less than or equal to the radial cross-sectional area of the pressurizing seat 31 at the air outlet end F. The first air inlet portion 14 on the air inlet plate 13 is blocked by the front pressurizing seat 31, so that the first air inlet portion 14 cannot be seen from front to back during use, that is, the light of the first air inlet portion 14 cannot be projected from the back to the front, so as to reduce the influence of the rotation of the mixed-flow fan 2 on the human eye. The blade tip portion 222 is closer to the air inlet plate 13 than the blade root portion 221 at the air inlet end R, so as to enhance the suction capacity of the mixed-flow fan 2.

[0035] With reference to Figure 5 and Figure 6 At least part of the air guide surface 211 is recessed towards the rotating shaft 24, and the air guide surface 211 as a whole is oriented to form an inclined angle with the rotating shaft 24 to define an inclined flow path, so that the axial air close to the rotating shaft 24 coming from the air inlet end R is changed to axial air or inclined air relatively far away from the rotating shaft 24 through the inclined flow path, which is beneficial to reducing air volume loss and increasing air pressure and air supply distance. It should be understood that at least part of the air guide surface 211 can be recessed towards the rotating shaft 24, so that the mixed-flow fan 2 can gather and expand the air volume and form high air pressure, and the noise of the outer rotor brushless motor 25 and the air noise can be closed to convert sharp noise into low-pitched noise. Of course, the air guide surface 211 can also be an inclined plane, or at least part of it can be convex away from the rotating shaft 24, and is not limited thereto.

[0036] With reference to Figure 3 , Figure 5 , Figure 6 and Figure 7, the pressurizing member 3 comprises a pressurizing seat 31 and a plurality of connecting members 32, the pressurizing seat 31 comprises a pressurizing surface 311 which increases radially from the air inlet end R to the air outlet end F, the plurality of connecting members 32 are connected and equidistantly arranged on the pressurizing surface 311, each connecting member 32 comprises a connecting root 321 connected with the pressurizing surface 311 and a connecting top 322 away from the pressurizing surface 311. At least part of the connecting members 32 are connected with the shell 1 and hollowly form negative pressure channels S, in this embodiment, other connecting members 32 are also connected with the shell 1, of course, since part of the connecting members 32 have been connected with the shell 1, other connecting members 32 can also not be connected with the shell 1. Except for the part of the connecting members 32 which hollowly form the negative pressure channels S, other connecting members 32 comprise a flow guiding curved surface 323, the flow guiding curved surface 323 is close to the blade 22, from back to front, the connecting member 32 extends forwardly in counterclockwise direction, the oblique flow air formed by the mixed flow fan 2 forms straight flow air after passing through the flow guiding curved surface 323, the straight flow air blows out in parallel with the rotating shaft 24, so as to increase the blowing distance and rapidly pressurize the air formed by the mixed flow fan 2. The connecting top 322 is connected with the shell 1, the rotating seat 21 is connected with the pressurizing seat 31 through fixed fitting structure, and the mixed flow fan 2 is relatively fixed in the shell 1 through the pressurizing member 3. Wherein, the maximum radius of the pressurizing member 3 at the air outlet end F is 28-35mm, in the case of ensuring sufficient air volume and air pressure, the blowing area is expanded.

[0037] At the same time, the connecting members 32 comb and transform the passing air, reduce turbulence, noise and vibration, reduce the noise emitted by turbulence crosstalk, realize noise reduction, convert sharp noise into low-pitched sound, greatly improve static pressure, reduce energy consumption, strengthen the concentration of the mixed flow fan 2, and the connecting members 32 flow the air formed by the mixed flow fan 2 and increase the air pressure. The connecting top 322 is connected with the shell 1, and the connecting root 321 forms an acute angle between the connecting top 322, that is to say, the shell 1 and the pressurizing surface 311 extend forwardly while approaching each other, so that the air is pressurized out of the gap between the shell 1 and the pressurizing surface 311, which is beneficial to increase the air volume and blowing distance.

[0038] Reference Figures 4 to 7, the pressurizing seat 31 is also generally frustum-shaped, the radial cross-sectional area of the pressurizing seat 31 at the air inlet end R is smaller than the radial cross-sectional area of the pressurizing seat 31 at the air outlet end F, the pressurizing seat 31 has a relatively large radial cross-section at the air outlet end F, the pressurizing seat 31 is concave at the air outlet end F to form a cavity 34, meanwhile, the pressurizing seat 31 and the shell 1 form the first air outlet part 15 at the air outlet end F, the first air outlet part 15 is located radially outside the cavity 34, the area inside the cavity 34 forms the first high negative pressure area A, in the embodiment, a cover 35 with a through hole 351 is arranged in the cavity 34, of course, in other embodiments, the cover 35 can also not be arranged. The radial cross-section of the pressurizing seat 31 at the air outlet end F is large, air is pressurized to flow out from the gap between the pressurizing seat 31 and the shell 1 at the air outlet end F, which is conducive to the reuse of the negative pressure air guiding function and the pressurizing function of the pressurizing seat 31.

[0039] With reference to Figure 3 , Figure 4 , Figure 5 and Figure 7 , the portable bladeless fan 100 further comprises a second air inlet part 17 and a second air outlet part 18, the second air inlet part 17 is arranged radially outside the shell 1, the second air outlet part 18 is arranged radially inside the pressurizing seat 31 and radially inside the first air outlet part 15, in the embodiment, the second air outlet part 18 is arranged radially inside the cavity 34. The negative pressure channel S connects the second air inlet part 17 and the second air outlet part 18, so as to continuously air supplement the first high negative pressure area A through the negative pressure channel S on the basis of ensuring that the first air outlet part 15 discharges the pressurized mixed flow, thereby reducing the airflow pulling and interference of the pressurized mixed flow, making the air outflow stable and increasing the air volume and the air supply distance.

[0040] With reference to Figures 4 to 7, at least part of the pressing surface 311 increases radially from the air inlet end R to the air outlet end F, and at least part of the pressing surface 311 is concave towards the rotation shaft. Specifically, the pressing surface 311 increases radially from the air inlet end R to the air outlet end F, and then extends forward parallel to the rotation shaft 24. Of course, in other embodiments, the pressing surface 311 can first extend forward parallel to the rotation shaft 24, and then increase radially, or increase radially all the time, or not change radially all the time, or decrease radially at least part of the time, without being limited thereto. The radial cross section of the accommodating cavity 34 is circular, and the accommodating cavity 34 includes a rear end surface 341 and a circumferential wall 342 connected to the end surface 341 and located in the radial direction. The end surface 341 is located axially behind the first air outlet part 15 to form the first high negative pressure area A. The second air outlet part 18 is located radially inside the circumferential wall 342 to shorten the length of the negative pressure channel S. Although the cover 35 is provided in this embodiment, the through hole 351 is provided on the cover 35, the through hole 351 and the second air outlet part 18 communicate with each other, and the through hole 351 and the second air outlet part 18 are at least partially aligned, so that the second air outlet part 18 can also continuously guide air in the first high negative pressure area A. Of course, the second air outlet part 18 can also be located on the end surface 341 or other parts of the pressing seat 31. Corresponding to the pressing surface 311, the circumferential wall 342 first increases radially from the end surface 341 and then extends forward parallel to the rotation shaft 24, so as to facilitate the fixing and dismounting of the fixing member 4. Of course, the circumferential wall 342 can also increase radially from the end surface 341 all the time, or the circumferential wall 342 can first extend forward parallel to the rotation shaft 24 and then increase radially, without being limited thereto.

[0041] Reference Figures 4 to 7The fixing member 4 includes a base 41 and a fixing portion 42 protruding from the surface of the base 41. The fixing portion 42 is used to fix the portable bladeless fan 100. The base 41 includes a central portion 411 and an edge portion 412 connecting the central portion. The edge portion 412 bends and extends from the central portion 411 in the opposite direction to the protruding direction of the fixing portion 42. The central portion 411 matches the end face 341, and the edge portion 412 matches the peripheral wall 342. That is, the shape of the fixing member 4 matches the shape of the cavity 34 to form a second high negative pressure zone B, so that the fixing member 4 is entirely housed in the cavity 34. Furthermore, because the first air outlet 15 is located radially outside the cavity 34, the air outlet effect is equivalent in both the state where the fixing member 4 fixes the portable bladeless fan 100 to an external object and the state where it is housed in the cavity 34, achieved through the second high negative pressure zone B. The fixing member 4 is provided with a ventilation port 43, which is connected to the through hole 351 and the second air outlet 18. On the basis of ensuring that the pressurized mixed flow is discharged from the first air outlet 15, the air supply to the second high negative pressure zone B is continuously replenished by the air guide through the negative pressure channel S, thereby reducing the airflow pulling and interference of the pressurized mixed flow, making the air outlet stable and increasing the air volume and air delivery distance. This achieves the same air outlet effect in both the state where the fixing member 4 fixes the portable bladeless fan 100 to an external object and the state where it is housed in the cavity 34.

[0042] In this embodiment, the central portion 411 and the edge portion 412 form a semi-open receiving portion 413. The receiving portion 413 is used for a replaceable device 414, which is used to house an IP character item (not shown, the same below). The device 414 and the IP character item are integrally housed within the receiving portion 413. That is, when the fixing member 4 is fixed within the cavity 34, the IP character item will not protrude forward from the receiving portion 413; when the fixing member 4 is fixed to the retaining member 19, combined with... Figure 1 The IP image item faces external objects without protruding, thus achieving the reuse of the fixing and decorative functions of the fixing component 4. The device 414 can also be decorated with other patterns, colors, or other possible combinations. In other embodiments, the receiving portion 413 can also be used to store a USB cable harness (not shown, the same below), with the entire USB cable harness housed within the receiving portion 413, thus achieving the reuse of the fixing and storage functions of the fixing component 4; the receiving portion 413 can also be used to store a spray device (not shown, the same below), with the entire spray device housed within the receiving portion 413, thus achieving the reuse of the fixing and humidifying functions of the fixing component 4. Specifically, the receiving portion 413 can also be used to house aromatherapy, mirrors, and other components, thus achieving the multi-functional reuse of the fixing component 4.

[0043] Reference Figures 4 to 7 , wherein the device 414 is arranged at the center portion 411, and the center portion 411 is arranged near the edge portion 412 and / or the edge portion 412 is arranged with the vent 43 communicating with the second air outlet 18, and the vent 43 and the device 414 are spaced apart to realize the multiplexing of the fixing function, the storage function and the negative pressure air guiding function of the fixing member 4. Moreover, due to the through hole 351 arranged on the cover 35, the through hole 351 and the second air outlet 18 are at least partially aligned, and the fixing portion 42 protrudes from the surface of the seat portion 41, so that the fixing portion 42 causes the seat portion 41 and the cover 35 to be spaced apart, and of course, the seat portion 41 and the cover 35 can also be arranged with a spacing therebetween, so that when the fixing member 4 is installed in the cavity 34, the vent 43 does not need to be aligned with the through hole 351, and the communication between the vent 43 and the through hole 351 can also be realized. When the fixing member 4 is rotated, the position of the vent 43 can also be changed, thereby changing the air outlet position of the negative pressure air guiding.

[0044] Reference Figures 4 to 7 , in combination Figure 1 , when the fixing portion 42 cooperates with the holding member 19, the portable bladeless fan 100 is fixed to an external plane, and the maximum radial cross-sectional area of the seat portion 41 is greater than the cross-sectional area of the holding member 19, so as to stably fix the portable bladeless fan 100 to the external plane. Specifically, in the present embodiment, the holding member 19 is the handle, the shape of the fixing portion 42 matches the shape of the bottom of the handle, and when the fixing member 4 is fixed to the bottom of the handle, the portable bladeless fan 100 is fixed to the external plane. Of course, in other embodiments, the seat portion 41 can be arranged with a suction member such as a suction cup to adsorb the portable bladeless fan 100 to an external object; or the seat portion 41 is arranged with a hanging member such as a hook or a hanging rope to hang the portable bladeless fan on an external object.

[0045] Reference Figure 3 , Figure 5 and Figure 7, the pressurizing member 3 and the mixed-flow fan 2 form a pressurized flow channel T with the shell 1, the radial cross-sectional area of the pressurized flow channel T at the air inlet end R is larger than that at the air outlet end F, air enters the pressurized flow channel T from the first air inlet part 14, and is discharged from the first air outlet part 15 after being pressurized and mixed in the pressurized flow channel T. After entering the mixed-flow fan 2 from the air inlet end R in the axial direction, the air exits from the air outlet end F, and the mixed-flow fan 2 combines the advantages of large air volume of an axial-flow fan and large air pressure of a centrifugal fan. At the same time, the mixed-flow fan 2 and the pressurizing member 3 form the pressurized flow channel T with the shell 1, the radial cross-sectional area of the pressurized flow channel T at the air inlet end R is large, which is conducive to air suction and increases the air volume; the radial cross-sectional area of the pressurized flow channel T at the air outlet end F is small, which is conducive to air compression and increases the air pressure. The characteristics of the mixed-flow fan 2 blowing air obliquely further increase the air pressure and the air supply distance, so that the portable bladeless fan 100 with a small volume realizes large air volume and high air pressure, realizes rapid cooling, and improves the user experience.

[0046] With reference to Figures 5 to 7 , the mixed-flow fan 2 and the pressurizing member 3 are arranged in close proximity in the axial direction, that is, the rotating seat 21 and the pressurizing seat 31 are arranged in close proximity in the axial direction, and the radial cross-sections of the rotating seat 21 at the air outlet end F and the pressurizing seat 31 at the air inlet end R are both circular, and the radii of the two are very close, and in this embodiment, the difference between the radii of the two is less than 2 mm, of course, this is not a limitation, as long as the pressurizing surface 311 and the air guide surface 211 are arranged in close proximity in the axial direction to block the air from entering the equivalent seamless connection interval D2 between the rotating seat 21 and the pressurizing seat 31. The air blocked from entering the equivalent seamless connection interval D2 between the rotating seat 21 and the pressurizing seat 31 is directly blown by the air formed by the mixed-flow fan 2 at the rear end, so as to continue to flow forward, so that the air more smoothly enters the part of the pressurized flow channel T between the air guide surface 211 and the shell 1 from the part of the pressurized flow channel T between the pressurizing surface 311 and the shell 1, reduces the eddy current loss, and reduces the noise of the turbulence crosstalk. Specifically, the equivalent seamless connection interval D2 of the rotating seat 21 and the pressurizing seat 31 in the axial direction is 1-1.5 mm, so that the air formed by the mixed-flow fan 2 flows smoothly to the pressurizing member 3, of course, this is not a limitation, as long as the equivalent seamless connection interval D2 of the air entering the rotating seat 21 and the pressurizing seat 31 is reduced.

[0047] With reference to Figure 6The air guide surface 211 includes a first extension section 2111 adjacent to one end of the pressurizing surface 311, and the pressurizing surface 311 includes a second extension section 312 adjacent to one end of the air guide surface 211, and the first extension section 2111 and the second extension section 312 have the same extension direction, so that the connection between the air guide surface 211 and the pressurizing surface 311 is smoother.

[0048] With reference to Figure 7 The vane 22 and the connecting piece 32 are arranged in close proximity in the axial direction to form an equivalent partition gap D3, and the minimum equivalent partition gap D3 between the vane 22 and the connecting piece 32 is 1-1.5 mm, so as to block the backflow of the airflow generated by the mixed-flow fan 2 at the air outlet end F to the air inlet end R along the gap between the vane 22 and the connecting piece 32, and to block the airflow from flowing between adjacent two connecting pieces 32, so as to comb the airflow and increase the air pressure, thereby achieving the effects of air guiding and noise reduction. Of course, the minimum equivalent partition gap D3 between the vane 22 and the connecting piece 32 is not limited thereto, as long as the airflow between the vanes 22 can flow smoothly to the connecting pieces 32 and reduce backflow loss.

[0049] With reference to Figure 3 , Figure 7 and Figure 9 From the back to the front, the vane 22 is connected to the air guide surface 211 and extends forward in a clockwise direction, and part of the connecting piece 32 is connected to the pressurizing surface 311 and extends forward in a counterclockwise direction, and the lines connecting the front and rear ends of the vane 22 connected to the air guide surface 211 and the lines connecting the front and rear ends of part of the connecting piece 32 connected to the pressurizing surface 311 form an included angle, so as to increase the air pressure. In addition, the curvature of part of the connecting piece 32 is greater than the curvature of the vane 22, so as to further increase the air pressure. Of course, the curvatures of the vane 22 and part of the connecting piece 32 are not limited thereto.

[0050] With reference to Figure 3 and Figure 9 In this embodiment, the number of vanes 22 is 7, and the number of connecting pieces 32 is 8, and in other embodiments, the ratio of the number of vanes 22 to the number of connecting pieces 32 can be in the range of 3 / 7-1, and of course is not limited thereto, as long as the portable bladeless fan 100 can ensure good wind suction capacity and good wind pressure increasing capacity.

[0051] With reference to Figure 5 and Figure 6, from the air inlet end R to the air outlet end F, the mixed-flow fan 2 and the pressurizing seat 31 are integrally increased in a radial direction in a trumpet shape to form an outwardly expanding pressurizing slope M, in particular, the rotating seat 21 and the pressurizing seat 31 are integrally increased in a radial direction in a trumpet shape to form the outwardly expanding pressurizing slope M, and the pressurizing slope M increases a pressurizing stroke of the airflow. The pressurizing slope M includes the air guide surface 211 and the pressurizing surface 311, two-stage pressurization, and both of the two-stage pressurizing strokes are increased, so that the pressurization effect is better.

[0052] Reference Figures 4 to 7, the axial length of the rotating seat 21 at the front and back ends is 0.8-1 or 1-1.5 times the axial length of the pressurizing seat 31 at the front and back ends, so that after the airflow is concentrated by the high pressure of the vanes 22, the airflow is combed by the connecting piece 32 for an equivalent distance, ensuring the maximum use airflow formed by the high pressure airflow and the external negative pressure airflow generated by the pressurizing piece 3, and the concentrated air supply distance of the maximum use airflow. It should be understood that the airflow pressure generated by the pressurizing piece 3 is high, which can drive the negative pressure air near the outside of the shell 1, thereby further increasing the airflow. Preferably, the axial length of the mixing fan 2 at the front and back ends and the axial length of the pressurizing piece 3 at the front and back ends are in a 1:1 ratio, which can meet the requirement of large airflow in the use scenario of the portable bladeless fan 100, and the product is light and thin; and the 1:1 ratio as a handheld device has a more symmetrical appearance that conforms to the aesthetic sense. The pressurizing piece 3 is provided with the cavity 34 for accommodating the fixing piece 4 at the air outlet end F. In the case that the axial length of the pressurizing seat 31 at the front and back ends is limited, the difference between the depth value of the cavity 34 and the length value of the pressurizing piece 3 from the air inlet end R to the air outlet end F is less than a first difference value, and the difference between the maximum opening radius value of the cavity 34 and the radius value of the maximum radial surface of the pressurizing piece 3 at the air outlet end F is less than a second difference value, so as to realize the multiplexing of the pressurizing function and the accommodating function of the pressurizing piece 3. In the case that the thickness of the rotating seat 21 and the pressurizing seat 31 is limited, the pressurizing inclined surface M can also make the radius value of the end face 341 of the cavity 34 adjacent to the rotating seat 21 and the radius value of the radial cross section of the shell 1 at the air outlet end F less than a third difference value, so as to increase the accommodating space of the cavity 34 for accommodating the fixing piece 4 by increasing the radial cross-sectional area of the end face 341 of the cavity 34 adjacent to the rotating seat 21 in the case that the depth value of the cavity 34 is limited. The first difference value and the second difference value are both 1.3-1.7 mm, and the third difference value is 6.2-6.8 mm, so as to ensure that the cavity 34 has sufficient accommodating space for accommodating the fixing piece 4 in the radial direction, and has sufficient space to form the first high negative pressure area A, while ensuring that the airflow is pressurized and discharged from the gap between the pressurizing inclined surface M and the shell 1 at the air outlet end F. Of course, in other embodiments, the first difference value, the second difference value and the third difference value can also be adjusted to other values, as long as the accommodating function and the pressurizing function of the pressurizing piece 3 can be balanced.

[0053] Reference Figures 5 to 7The pressurizing slope M forms the pressurizing flow channel T with the shell 1, and the pressurizing slope M comprises the air guide surface 211 and the pressurizing surface 311. The cooperation of the pressurizing slope M and the shell 1 realizes noise reduction, so as to convert sharp noise into low noise. The pressurizing flow channel T comprises a first channel T1 and a second channel T2 connected in series. The first channel T1 is formed between the air guide surface 211 of the mixed flow fan 2 and the first shell 11 in the radial direction, and the second channel T2 is formed between the pressurizing surface 311 of the pressurizing seat 31 and the second shell 12 in the radial direction. The minimum radial cross-sectional area of the first channel T1 is greater than or equal to the maximum cross-sectional area of the second channel T2.

[0054] With reference to Figures 5 to 7 In the radial direction, the first shell 11 comprises a first flow guide surface 111 facing the air guide surface 211. The air guide surface 211 and the first flow guide surface 111 are both annular. At least part of the air guide surface 211 is radially recessed to form a concave surface. The first flow guide surface 111 increases in the radial direction from the air inlet end R to the air outlet end F. At least part of the first flow guide surface 111 is radially protruded to form a convex surface. Therefore, the structure of the first channel T1 can gather air flow while being pressurized. Of course, this is only one form of the air guide surface 211 and the first flow guide surface 111, and is not limited thereto.

[0055] With reference to Figures 5 to 7 In the radial direction, the second shell 12 comprises a second flow guide surface 121 facing the pressurizing surface 311. The pressurizing surface 311 and the second flow guide surface 121 are both annular. At least part of the pressurizing surface 311 increases in the radial direction and is radially recessed to form a concave surface. The second flow guide surface 121 decreases in the radial direction from the air inlet end R to the air outlet end F. At least part of the second flow guide surface 121 is radially protruded to form a convex surface. Therefore, the structure of the second channel T2 can further pressurize the high-pressure air flow formed at the rear to form high-pressure air flow. Of course, this is only one form of the pressurizing surface 311 and the second flow guide surface 121, and is not limited thereto.

[0056] The first flow guide surface 111 and the second flow guide surface 121 are convex surfaces formed by radial protrusion, and the first flow guide surface 111 and the second flow guide surface 121 increase radially first and then decrease radially from the air inlet end R to the air outlet end F to form a smooth and complete curved surface, which not only has the effect of increasing air volume and air pressure, but also improves the aesthetics of the shell 1. The radial distance between the second flow guide surface 121 and the rotating shaft 24 at the air outlet end F is greater than the radial distance between the first flow guide surface 111 and the rotating shaft 24 at the air inlet end R, which is conducive to blowing the air close to the rotating shaft 24 to a position relatively far away from the rotating shaft 24 in the radial direction, so as to increase the air supply distance.

[0057] With reference to Figures 4 to 6 , the axial air at the air inlet end R changes to flow obliquely forward along the air guide surface 211, which can make the air closer to the axial direction flow obliquely outward; the oblique air at the air outlet end F of the mixed-flow fan 2 changes to flow obliquely forward along the pressurizing surface 311 and further obliquely outward, so as to leave sufficient space for the fixed part 4 near the axis of the pressurizing part 3. The connecting line of the front and rear ends of the air guide surface 211 forms a first angle a with the rotating shaft 24, and the connecting line of the front and rear ends of the pressurizing surface 311 forms a second angle b with the rotating shaft 24, the first angle a is greater than the second angle b, so as to increase the air pressure while reducing the loss of air volume. The range of the first angle a is 30-45 degrees, and the range of the second angle b is 5-15 degrees. The air guide surface 211 is at least partially recessed towards the rotating shaft 24, and the axial air at the air inlet end R flows along the air guide surface 211 which increases in slope to be rapidly pressurized. The pressurizing surface 311 first increases radially and then remains unchanged radially from the air inlet end R to the air outlet end F, and the radially increasing part and the radially unchanged part of the pressurizing surface 311 are both planes. The air formed by the mixed-flow fan 2 flows along the pressurizing surface 311 which decreases in slope to be secondarily pressurized. The rapid pressurization of the air via the air guide surface 211 and the secondary pressurization of the air via the pressurizing surface 311 form high-pressure air, so that the portable bladeless fan 100 has good blowing effect and long air supply distance; at the same time, the two oblique structures also have the effects of air guiding and noise reduction.

[0058] With reference to Figure 5 , Figure 7 and Figure 8 , at least part of the air guide surface 211 is recessed towards the rotating shaft 24 from the air inlet end R to the air outlet end F, so that the mixed-flow fan 2 gathers air volume and forms a first high air pressure; as Figure 4 , from left to right, the distance between the blade tip part 222 and the radial gap in the radial direction of the shell 1 shows a decreasing trend from the air inlet end R to the air outlet end F, but in combination withFigure 8 The distance between the minimum radial gap between the blade top 222 and the shell 1 is maintained within the error range of the equivalent separation distance D4 to separate the airflow generated by the mixed-flow fan 2 at the air outlet end F from flowing back to the mixed-flow fan 2 at the air inlet end R through the minimum radial gap, thereby increasing the second high wind pressure and reducing the noise of turbulence crosstalk; the distance between any two adjacent blades 22 gradually increases from the air inlet end R to the air outlet end F to increase the third high wind pressure; and the connecting piece 32 forms uniform airflow for the mixed-flow fan 2 and increases the fourth high wind pressure.

[0059] Based on the aggregation of large air volume at the air inlet end R to form the first high wind pressure, while increasing the second high wind pressure, the third high wind pressure and the fourth high wind pressure, the mixed-flow fan 2 has the ability to form large air volume and high wind pressure to produce large air volume and high wind pressure in the small volume of the portable bladeless fan 100, and to increase the air supply distance, which perfectly meets the needs of users.

[0060] Since the portable bladeless fan 100 is small and exquisite in structure, the plate is light and thin, and the structure is easy to crack. In the development and experiment process, slight adjustment of each structure, angle, radian, aperture, and air duct length will greatly change the air volume, wind pressure, and wind noise of the product. Moreover, in the later mass production process, it will be difficult to come out of the mold, or it will need to be tried through a complex and high-cost process. This is completely not in the same geometric level as the difficulty of implementing Dyson's large products. Therefore, even Dyson does not have related products and patented technologies. More so, other companies with low research and development capabilities do not have the ability to develop and produce related products and patents. Due to such reasons, the applicant has made complicated hand plates, experiments and tests on at least five variable factors of structure, angle, radian, aperture, and air duct length for hundreds or thousands of combinations, and finally obtained the relatively optimal parameter combination of structure, angle, radian, aperture, and air duct length. A balance is taken on air volume, wind pressure, and wind noise to take the user's body feeling as the ultimate goal to make a revolutionary product.

[0061] The above detailed description is only for 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 content of the present application specification and drawings are included in the patent scope of the present application.

Claims

1. A portable bladeless fan, characterized by, The portable bladeless fan comprises: a shell, a rear side of the shell is provided with an air inlet plate, the air inlet plate is provided with a first air inlet part, a front side of the shell is provided with a first air outlet part, the first air inlet part and the first air outlet part are connected in the shell; a pressurizing part connected to the front side of the shell; a mixed flow fan located in the shell and connected to the rear side of the pressurizing part, the mixed flow fan rotates around a rotation shaft to generate airflow, the mixed flow fan comprises a rotation seat and a plurality of blades of a guide surface connected to the rotation seat at equal intervals, the blades form an air inlet window at an air inlet end away from a blade top of the guide surface, wherein a radial cross-sectional area of the air inlet plate is less than or equal to an area of the air inlet window; a fixing part for fixing the portable bladeless fan to an external object, the fixing part is detachably fixed to a front end of the pressurizing part; wherein the mixed flow fan and the pressurizing part form a pressurized flow channel with the shell, air enters the pressurized flow channel from the first air inlet part, and is discharged from the first air outlet part after forming a pressurized mixed flow in the pressurized flow channel; the pressurizing part comprises a pressurizing seat, a containing cavity is concavely arranged at an air outlet end of the pressurizing seat, the first air outlet part is located on a radial outer side of the containing cavity, and an area in the containing cavity forms a first high negative pressure area.

2. The portable bladeless fan of claim 1, wherein, the mixed flow fan comprises a rotation seat that increases radially from an air inlet end to an air outlet end, the pressurizing part comprises the pressurizing seat that increases radially from the air inlet end to the air outlet end, the rotation seat and the pressurizing seat both increase radially as a whole, the rotation seat and the pressurizing seat form the pressurized flow channel with the shell, an axial length of both ends of the rotation seat is 1-1.5 times an axial length of both ends of the pressurizing seat; the shape of the fixing part matches the shape of the containing cavity to form a second high negative pressure area, the fixing part is accommodated in the containing cavity as a whole, so that the air outlet effect of the fixing part is equivalent in both states of fixing the portable bladeless fan to an external object and being accommodated in the containing cavity.

3. The portable bladeless fan of claim 2, wherein, the containing cavity comprises an end face located at the rear and a circumferential wall connected to the end face and located in the radial direction, the end face is located at the rear of the first air outlet part in the axial direction; the fixing part comprises a seat part and a fixing part protruding from a surface of the seat part, the fixing part is used for fixing the portable bladeless fan, the seat part comprises a center part and an edge part connected to the center part, the edge part is bent and extends from the center part in a direction opposite to the protruding direction of the fixing part, the center part matches the end face, and the edge part matches the circumferential wall, so that the fixing part is accommodated in the containing cavity as a whole.

4. The portable bladeless fan of claim 3, wherein, the center part and the edge part form a semi-open accommodation part for an IP image article arranged in a detachable and replaceable manner, the IP image article is accommodated in the accommodation part as a whole, so as to realize the multiplexing of the fixing function and the decoration function of the fixing part; or, the accommodation part is used for accommodating a USB wire harness, the USB wire harness is accommodated in the accommodation part as a whole, so as to realize the multiplexing of the fixing function and the accommodation function of the fixing part. Or, the accommodating part is used for accommodating a spraying member, the spraying member is accommodated in the accommodating part as a whole to realize multiplexing of the fixing function and the humidifying function of the fixing member.

5. The portable bladeless fan of claim 2, wherein, Further comprising a second air inlet part and a second air outlet part, the second air inlet part is arranged on the radial outer side of the shell, the second air outlet part is arranged on the radial inner side of the cavity, the pressurizing part further comprises a plurality of connecting parts connecting the pressurizing seat and the shell, at least part of the connecting parts are connected to the shell and hollowly form a negative pressure channel, the negative pressure channel communicates the second air inlet part and the second air outlet part, so as to continuously air supplement the first high negative pressure area or the second high negative pressure area through the negative pressure channel to guide air, on the basis of ensuring the first air outlet part to discharge the pressurized mixed flow, thereby reducing the airflow pulling and interference of the pressurized mixed flow, making the air outlet stable and increasing the air volume and the air supply distance.

6. The portable bladeless fan of claim 5, wherein, The fixing member is correspondingly provided with a ventilation opening, the ventilation opening communicates with the second air outlet part, and air supplement to the second high negative pressure area is continuously performed through the negative pressure channel to guide air, so as to realize the air outlet effect of the fixing member in the two states of being fixed to an external object and being accommodated in the cavity.

7. The portable bladeless fan of claim 5, wherein, The fixing member comprises a seat part and a fixing part protruding from the surface of the seat part, the fixing part is used for being fixed with the portable bladeless fan, the seat part comprises a center part and an edge part connected to the center part, the edge part is bent and extended from the center part to the opposite direction of the protruding direction of the fixing part, the center part and the edge part form a semi-open accommodating part, and the accommodating part is used for accommodating a device; wherein, the device accommodated in the accommodating part is correspondingly arranged on the center part, the center part is arranged close to the edge part and / or the edge part is correspondingly provided with a ventilation opening communicating with the second air outlet part, and the ventilation opening and the device have a spacing therebetween, so as to realize multiplexing of the fixing function, the accommodating function and the negative pressure air guiding function of the fixing member.

8. The portable bladeless fan of claim 1, wherein, Further comprising a holding member arranged on the outer side of the shell, the fixing member comprises a seat part and a fixing part protruding from the surface of the seat part, when the fixing part cooperates with the holding member, the portable bladeless fan is fixed to an external plane, and the maximum radial cross-sectional area of the seat part is greater than the cross-sectional area of the holding member; or, the seat part is provided with a suction cup to adsorb the portable bladeless fan to an external object; or, the seat part is provided with a hook or a hanging rope to hang the portable bladeless fan on an external object.

9. The portable bladeless fan of claim 8, wherein, The lower part of the shell is provided with a handle, the handle is the holding member, the shape of the fixing part matches the shape of the bottom of the handle, and when the fixing member is fixed to the bottom of the handle, the portable bladeless fan is fixed to an external plane.

10. The portable bladeless fan of claim 1, wherein, The portable bladeless fan is a handheld bladeless fan provided with a handle, a clamping fan provided with a clamp, a versatile fan provided with a curved shaping member for winding, a desktop fan provided with a support, or a floor fan provided with a telescopic support.

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