Portable electric fan

Abstract

The utility model discloses a portable electric fan. A fan wheel and a wheel-shaped mounting seat are arranged in a first cylindrical shell, a front cover is arranged at a front port, and a rear cover is arranged at a rear port. A rotor magnet is arranged in a first barrel-shaped hub part of a fan wheel, and a motor rotating shaft is arranged in the center of a barrel bottom. The wheel-shaped mounting seat comprises a cylindrical contour part, a second cylindrical hub part and a plurality of first plate-shaped spokes. And a tubular mounting seat is arranged at the center of the barrel bottom of the second barrel-shaped hub part. A motor rotating shaft is assembled in the tubular mounting seat, and a stator coil is sleeved outside the tubular mounting seat. The front cover is embedded into the front end of the cylindrical contour part and comprises a front cover hub part and a plurality of second plate-shaped spokes. The first plate-shaped spokes and the second plate-shaped spokes form a plurality of flow guide plates in a one-to-one correspondence mode, and air outlet airflow can be concentrated.

Description

Technical Field

[0001] This application belongs to the field of small household appliances, specifically relating to a portable electric fan. Background Technology

[0002] Existing portable electric fans have built-in rechargeable batteries that can be charged via USB or wirelessly. Their air delivery mechanism is a fan wheel with the motor rotor located inside the fan wheel hub. The structure is compact, but the airflow is dispersed and the air delivery distance is limited.

[0003] The blower used for cleaning lawns uses a longer air cylinder to increase the range. The air cylinder has a set of deflectors to form several airflow channels, which can reduce turbulence and noise. Summary of the Invention

[0004] The technical problem to be solved by this application is how to improve the air delivery mechanism of a portable electric fan to improve the air delivery effect.

[0005] This application discloses a portable electric fan. The portable electric fan includes:

[0006] A first cylindrical outer shell;

[0007] A fan wheel, located inside a first cylindrical housing, includes a first barrel-shaped hub portion containing a rotor magnet, a plurality of fan blades circumferentially distributed on the outer side of the first barrel-shaped hub portion, and a motor shaft located at the center of the bottom of the first barrel-shaped hub portion;

[0008] A wheel-shaped mounting base is located inside a first cylindrical outer shell, including a cylindrical profile, a second barrel-shaped hub, and a plurality of first plate-shaped spokes. A tubular mounting base is provided at the center of the bottom of the second barrel-shaped hub. The motor shaft is assembled inside the tubular mounting base, and a stator coil is sleeved on the outside.

[0009] A front cover, comprising a front cover hub portion facing the second barrel-shaped hub portion and a plurality of second plate-shaped spokes circumferentially distributed on the outer side of the front cover hub portion, embedded in the front end of the cylindrical profile portion; and

[0010] A rear cover is installed at the rear port of the first cylindrical housing;

[0011] The rotor magnet, the motor shaft, and the stator coil together form a drive motor, and each of the first plate-shaped spokes and the corresponding second plate-shaped spoke together form a guide plate.

[0012] In some embodiments of this application, all the first plate-shaped spokes may have one thick flat plate with a radially extending wire groove for mounting power supply wires, and the remainder may be propeller blade shaped; all the second plate-shaped spokes may be flat.

[0013] In some embodiments of this application, the following can be selected:

[0014] The first cylindrical outer shell is configured as a cylinder, and the portable electric fan also includes a handle portion that is cylindrical, elliptical, or multifaceted.

[0015] Furthermore, the handle portion is configured as a battery compartment, including a second cylindrical outer shell; both the second cylindrical outer shell and the first cylindrical outer shell are aluminum alloy components, and at least the exposed surfaces are treated with sandblasting-anodizing or spray painting.

[0016] Furthermore, the handle portion also includes a connecting shell; the connecting shell is mainly in the shape of a flat ring, and is fixedly connected to the top end of the second cylindrical outer shell on one axial side, and fixedly connected to the side of the first cylindrical outer shell on the other axial side.

[0017] Furthermore, the handle portion also includes: a front half shell and a rear half shell for enclosing and forming a battery cavity, located inside the second cylindrical outer shell, with the top ends of both being integrally assembled with the connecting shell; and a cover that snaps onto the bottom ends of the front half shell and the rear half shell for closing the bottom port of the second cylindrical outer shell.

[0018] Furthermore, both the first cylindrical outer shell and the second cylindrical outer shell have silver exposed surfaces; both the connecting shell and the front cover have black or white exposed surfaces; the connecting shell has a downwardly extending portion at the center of its front side, and a power switch is embedded in the extension portion, which has an electroplated glossy exposed surface.

[0019] In some embodiments of this application, the portable electric fan may further include: a rear positioning ring for fixing the rear cover to the rear port of the first cylindrical housing; and a front positioning ring for fixing the front cover to the cylindrical profile portion; wherein both the rear positioning ring and the front positioning ring have electroplated or polished bright exposed surfaces.

[0020] In some embodiments of this application, the inner wall of the front port of the cylindrical profile portion may be provided with a radially protruding positioning ring, and the positioning ring may be provided with a plurality of circumferentially distributed positioning notches; at least two of the first plate-shaped spokes may be provided with positioning protrusions at their radially outer ends; each positioning protrusion may be embedded in one of the positioning notches.

[0021] In some embodiments of this application, the portable electric fan may further include an inner sleeve located inside the first cylindrical outer shell and behind the wheel-shaped mounting base, surrounding the fan wheel, and engaging with the wheel-shaped mounting base along a common central axis.

[0022] The following beneficial effects can be obtained by implementing the technical solution of this application.

[0023] This application discloses a portable electric fan. It has a first cylindrical outer shell, inside which is a fan wheel and a wheel-shaped mounting base. A front cover is provided at the front end, and a rear cover is provided at the rear end. The fan wheel has a first cylindrical hub containing a rotor magnet, and a motor shaft is located at the center of the bottom of the shell. The wheel-shaped mounting base includes a cylindrical profile, a second cylindrical hub, and several first plate-shaped spokes. A tubular mounting seat is located at the center of the bottom of the second cylindrical hub. The motor shaft is assembled inside the tubular mounting seat, and a stator coil is sleeved on the outside. The front cover is embedded in the front end of the cylindrical profile and includes a front cover hub and several second plate-shaped spokes. The first and second plate-shaped spokes correspond one-to-one to form several guide plates, which can concentrate the airflow. Attached Figure Description

[0024] The accompanying figures should be used in conjunction with the detailed implementation section.

[0025] Figure 1 This is a perspective view of the portable electric fan in Embodiment 1, showing the air outlet;

[0026] Figure 2 yes Figure 1 Another 3D view of the portable electric fan shown illustrates the air inlet.

[0027] Figure 3 yes Figure 1 An exploded view of the portable electric fan shown.

[0028] Figure 4 yes Figure 1 The figure shows a cross-sectional view of a portable electric fan. The dotted line with arrows in the figure is the central axis of the air supply section and indicates the direction of airflow.

[0029] Figure 5 This is an exploded view of the assembly of the front cover, wheel-shaped mounting base, and fan wheel in Embodiment 1;

[0030] Figure 6 This is a perspective view of the wheel-shaped mounting base in Embodiment 1, showing its rear end face;

[0031] Figure 7 This is a perspective view of the front cover in Embodiment 1, showing its rear end face. Detailed Implementation

[0032] The embodiments are described below with reference to the accompanying drawings.

[0033] In this specification, unless otherwise specified, "one embodiment," "some embodiments," and "other embodiments" are used to distinguish different embodiments and do not refer to all embodiments in general; the accompanying drawings are schematic diagrams, not scale diagrams; the directions / positions indicated by top, bottom, center, edge, inner, outer, far, near, long, wide, vertical, horizontal, up, down, front, back, left, right, etc., are based on the viewing angle of the accompanying drawings and should not be interpreted as the component / device being located in a specific position or facing a specific direction; the sequence words such as first, second, third, etc., are used to distinguish components / devices with the same function / name and have no sequential meaning.

[0034] One embodiment discloses a portable fan.

[0035] Please see Figure 1 and Figure 2 The portable fan is T-shaped and consists of an air delivery section 10 and a handle section 20. Both the air delivery section 10 and the handle section 20 are cylindrical and perpendicular to each other. The front end of the air delivery section 10 is configured as an air outlet 10a, and the rear end is configured as an air inlet 10b. The handle section 20 is the battery compartment.

[0036] An electronic control unit 28 is provided inside the upper part of the handle 20. The power switch 281 of the electronic control unit 28 is embedded in the front side of the handle 20. The charging interface 282 of the electronic control unit 28 is embedded in the rear side of the handle 20.

[0037] Please see Figure 1 , Figure 2 and Figure 4 The handle portion 20 includes a second cylindrical outer shell 21, a compartment cover 22, a front half shell 231, a rear half shell 232, a connecting shell 233, and an electronic control unit 28.

[0038] The front half-shell 231, the rear half-shell 232, and the connecting shell 233 are all injection molded parts, interlocking to form a cylindrical assembly 23. The front half-shell 231 and the rear half-shell 232 are both semi-cylindrical and interlocked, both enclosed by the second cylindrical outer shell 21. The connecting shell 233 is exposed and located at the top of the cylindrical assembly 23. The inner cavity of the cylindrical assembly 23 is largely used to install the rechargeable battery 24, and the upper part houses the electronic control unit 28.

[0039] The front half shell 231 and the rear half shell 232 are used to enclose and form a battery cavity, located inside the second cylindrical outer shell 21, and their top ends are assembled with the connecting shell 233 as one piece.

[0040] The frontal projection of the connecting shell 233 is T-shaped. The main body of the connecting shell 233 is a flattened annular shape, with a downwardly extending portion located in the center of its front side. The power switch 281 is embedded in this extension portion. Both the rear half shell 232 and the second cylindrical outer shell 21 have through holes to embed the charging interface 282. The power switch 281 and the charging interface 282 are arranged opposite each other in the same radial direction, one after the other.

[0041] The cover 22 is sealed at the bottom port of the handle portion 20, and electrode plates can be installed to conduct electricity between the rechargeable battery 24 and the electronic control unit 28. Specifically, the cover 22 snaps onto the bottom ends of the front half-shell 231 and the rear half-shell 232 to seal the bottom port of the second cylindrical outer shell 21. The specific structure of the cover 22 can be found in commercially available flashlights.

[0042] Please see Figure 1 , Figure 2 and Figure 3 The air supply unit 10 includes a first cylindrical outer shell 11, an inner sleeve 13, a fan wheel 15, a rear cover 17, a rear positioning ring 19, a wheel-shaped mounting seat 12, a front cover 14, and a front positioning ring 16.

[0043] The first cylindrical outer shell 11 has an opening on one side, through which it is fixedly assembled to the axial side of the connecting shell 233. That is, the connecting shell 233 is fixedly connected to the side of the first cylindrical outer shell 11 on the other axial side, and fixedly connected to the top of the second cylindrical outer shell 21 on the other axial side.

[0044] Please see Figure 4 and Figure 5 The fan wheel 15 is located inside the first cylindrical housing 11. The fan wheel 15 includes: a first barrel-shaped hub portion 151 with a rotor magnet inside, a plurality of fan blades 152 circumferentially distributed on the outer side of the first barrel-shaped hub portion 151, and a motor shaft 153 located at the center of the bottom of the first barrel-shaped hub portion 151. The end of the motor shaft 153 protrudes from the opening of the first barrel-shaped hub portion 151 and is mounted in the tubular mounting base 126 by bearings.

[0045] Please refer to Figure 4 , Figure 5 and Figure 6 The wheel-shaped mounting base 12 is located inside the front half of the first cylindrical housing 11. The wheel-shaped mounting base 12 includes a cylindrical profile portion 121, a second barrel-shaped hub portion 123, and five first plate-shaped spokes.

[0046] The outer surface of the cylindrical profile 121 is provided with three circumferentially distributed and axially extending through slots 121a to reduce weight and facilitate assembly. Each through slot 121a has an axially protruding locating lug 1211 at its rear end for engaging the inner sleeve 13.

[0047] The inner wall of the front port of the cylindrical profile portion 121 is provided with a radially protruding positioning ring 1212. The positioning ring 1212 has four circumferentially distributed positioning notches 121b for mounting the front cover 14. The positioning ring 1212 has three circumferentially distributed positioning holes 121c for mounting the front positioning ring 16.

[0048] The lower rear end of the cylindrical profile portion 121 is provided with a wire notch 121d for inserting a wire.

[0049] The four first plate-shaped spokes are shaped like propeller blades. Figure 6 The marking is 122. One of the first plate-shaped spokes is a thick flat plate shape. Figure 6 The Chinese character is marked as 122'.

[0050] The bottom of the second barrel-shaped hub 123 has a tubular mounting seat 126 at the center and three pin holes 123a on the outer edge.

[0051] The tubular mounting base 126 houses the motor shaft 153 internally and the stator coil externally. A first plate-shaped spoke 122', pointing towards the handle portion 20, has a radially extending wire groove 122a for mounting the aforementioned wire. The wire is used to connect the electronic control unit 28 and the stator coil. The stator coil, rotor magnet, and motor shaft together form a drive motor. The stator coil, rotor magnet, bearings, and wires are not shown in the accompanying drawings.

[0052] Please see Figure 4 , Figure 5 and Figure 7 The front cover 14 is embedded in the front end of the cylindrical profile portion 121 and is fixed by the front positioning ring 16.

[0053] The front cover 14 includes: a front cover hub portion 141 facing the second barrel-shaped hub portion 123, five second plate-shaped spokes circumferentially distributed on the outer side of the front cover hub portion 141, four positioning protrusions 144, and four positioning pins 145.

[0054] Four positioning protrusions 144 are respectively provided at the radially outward ends of the four second plate-shaped spokes 143, and are respectively embedded in the four positioning notches 121b.

[0055] The front cover hub portion 141 is also barrel-shaped. Four positioning pins 145 are provided on the inner side wall of the front cover hub portion 141, with their ends protruding from the barrel opening of the front cover hub portion 141 and inserted into the four pin holes 123a in a corresponding manner.

[0056] The four second plate-shaped spokes are thin flat plates, in Figure 5 , 7 The number 143 corresponds one-to-one with the four first plate-shaped spokes 122 and together they form four curved guide vanes.

[0057] One of the second plate-shaped spokes is thick and flat. Figure 5 , 7 The central label is 143', which corresponds to the first plate-shaped spoke 122' and together they form a thicker planar guide plate.

[0058] All deflectors are evenly distributed circumferentially, with the thicker deflectors facing the handle portion 20.

[0059] The front positioning ring 16 is used to secure the front cover 14 to the front end of the cylindrical profile portion 121. The front positioning ring 16 has three axially extending positioning protrusions, each of which is inserted into a positioning hole 121c.

[0060] The inner sleeve 13, which is structurally similar and roughly the same size as the cylindrical profile portion 121, is located inside the rear half of the first cylindrical outer shell 11, behind the wheel-shaped mounting seat. The inner sleeve 13 surrounds the fan wheel 15 and is concentrically engaged with the wheel-shaped mounting seat 12 along a common central axis.

[0061] The rear cover 17 is mesh and is installed at the rear port of the first cylindrical outer shell 11 to prevent foreign objects from entering the air supply section 10.

[0062] The rear positioning ring 19, which is similar in structure to the front positioning ring 16, is used to fix the rear cover 17 onto the rear port of the inner sleeve 13.

[0063] Specifically, the first and second cylindrical shells are aluminum alloy components, both with silver exposed surfaces, and the exposed surfaces are treated with sandblasting-anodizing or spray painting; the visible end faces and visible hole (slot) walls of both do not need to be post-treated and can be treated in the same way as the exposed surfaces.

[0064] Specifically, the connecting shell and front cover both have black exposed surfaces, while the power switch, rear positioning ring, and front positioning ring all have electroplated bright silver exposed surfaces.

[0065] With the above structure, the portable electric fan has five air guide plates inside. Each air guide plate is composed of a first plate-shaped spoke and a second plate-shaped spoke. The gaps between the air guide plates form five airflow channels, thereby concentrating the airflow and increasing the air delivery distance. The first and second cylindrical outer shells are made of silver aluminum alloy components, while the connecting shell and front cover have a black appearance. The power switch, rear positioning ring, and front positioning ring all have an electroplated bright silver appearance, thus making them highly recognizable.

[0066] In another embodiment, there may be 3, 4, 6, 7, or 8 deflectors, and the gaps between the deflectors form 3, 4, 6, 7, or 8 airflow channels. The specific number of deflectors can be selected according to the rated power and the fan impeller diameter.

[0067] In another embodiment, there may be two or three positioning protrusions 144, that is, the second plate-shaped spokes 143 may not all be provided with positioning protrusions 144, thereby simplifying the component structure and product manufacturing process.

[0068] In another embodiment, the handle is connected to one end of the air supply unit, making the portable fan L-shaped, which facilitates balancing the reaction force of the airflow.

[0069] In other embodiments, the main body of the handle is in the shape of an elliptical cylinder, a square prism, a regular pentagonal prism, a hexagonal prism, a heptagonal prism, or an octagonal prism, and the annular main body of the connecting shell 233 has an inverted frustum shape; the edges of the handle are rounded, so that it is comfortable to hold and can also prevent accidental twisting.

[0070] In other embodiments, the portable fan eliminates the handle and is mounted in the desired location via a clamp, or magnetically attached to the back of a mobile phone, charging from the phone, and blowing air above the phone, or magnetically attached to a wireless power bank (portable charging battery module), charging wirelessly, and blowing air to the side of the power bank.

[0071] In another embodiment, the connecting shell and the front cover both have exposed surfaces in milky white, dark red, or earth blue, while the exposed surfaces of the power switch, rear positioning ring, and front positioning ring are electroplated in bright silver, bright gold, bright copper, Prussian blue, or polished zirconium white, giving the portable fan a soft and harmonious appearance.

[0072] The above embodiments, application examples, and technical analyses are intended to introduce the technical concept and features of this application, enabling those skilled in the art to implement the technical solutions of this application, and do not constitute a limitation on the scope of protection claimed. Simple modifications and equivalent transformations to the embodiments are all within the above-mentioned scope of protection.

Claims

1. A portable electric fan, characterized in that... include: A first cylindrical outer shell; A fan wheel, located inside a first cylindrical housing, includes a first barrel-shaped hub portion containing a rotor magnet, a plurality of fan blades circumferentially distributed on the outer side of the first barrel-shaped hub portion, and a motor shaft located at the center of the bottom of the first barrel-shaped hub portion; A wheel-shaped mounting base is located inside a first cylindrical outer shell, including a cylindrical profile, a second barrel-shaped hub, and a plurality of first plate-shaped spokes. A tubular mounting base is provided at the center of the bottom of the second barrel-shaped hub. The motor shaft is assembled inside the tubular mounting base, and a stator coil is sleeved on the outside. A front cover, comprising a front cover hub portion facing the second barrel-shaped hub portion and a plurality of second plate-shaped spokes circumferentially distributed on the outer side of the front cover hub portion, embedded in the front end of the cylindrical profile portion; and A rear cover is installed at the rear port of the first cylindrical housing; The rotor magnet, the motor shaft, and the stator coil together form a drive motor, and each of the first plate-shaped spokes and the corresponding second plate-shaped spoke together form a guide plate.

2. The portable electric fan according to claim 1, characterized in that, All of the first plate-shaped spokes have one that is in the shape of a thick flat plate and has a radially extending wire groove for mounting power supply wires, while the rest are in the shape of propeller blades. All of the second plate-shaped spokes are flat.

3. The portable electric fan according to claim 1, characterized in that: The first cylindrical outer shell is configured as a cylinder; It also includes a handle portion that is cylindrical, elliptical, or multifaceted.

4. The portable electric fan according to claim 3, characterized in that, The handle portion is configured as a battery compartment and includes a second cylindrical outer shell; Both the second cylindrical outer shell and the first cylindrical outer shell are aluminum alloy components, and at least the exposed surfaces have undergone sandblasting-anodizing treatment or spray painting treatment.

5. The portable electric fan according to claim 4, characterized in that, The handle portion also includes a connecting shell; The connecting shell is mainly in the shape of a flat ring, and is fixedly connected to the top of the second cylindrical shell on one axial side and to the side of the first cylindrical shell on the other axial side.

6. The portable electric fan according to claim 5, characterized in that, The handle portion also includes: A front half-shell and a rear half-shell, used to enclose and form a battery cavity, are located inside the second cylindrical outer shell, and their top ends are integrally assembled with the connecting shell; and A cover, snapped onto the bottom of the front half-shell and the rear half-shell, is used to close the bottom port of the second cylindrical outer shell.

7. The portable electric fan according to claim 5, characterized in that, Both the first cylindrical outer shell and the second cylindrical outer shell have exposed silver surfaces; Both the connecting shell and the front cover have black or white exposed surfaces; The connecting shell has a downwardly extending portion at the center of its front side, and a power switch is embedded in the extension portion. The power switch has a bright exposed surface that is electroplated or polished.

8. The portable electric fan according to claim 1 or 7, characterized in that... Also includes: A rear positioning ring is used to secure the rear cover to the rear port of the first cylindrical housing; And a front positioning ring for securing the front cover to the cylindrical profile portion; Both the rear positioning ring and the front positioning ring have bright exposed surfaces that have been electroplated or polished.

9. The portable electric fan according to claim 1, characterized in that, The inner wall of the front port of the cylindrical profile is provided with a radially protruding positioning ring, and the positioning ring is provided with a plurality of circumferentially distributed positioning notches. Of all the first plate-shaped spokes, at least two have positioning protrusions at their radially outer ends; Each of the positioning protrusions is embedded in one of the positioning notches.

10. The portable electric fan according to claim 1, characterized in that... Also includes: An inner sleeve is located inside the first cylindrical outer shell, behind the wheel-shaped mounting base, surrounding the fan wheel, and is engaged with the wheel-shaped mounting base along the same central axis.

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