CN219865519U - Fan assembly and portable fan - Google Patents

Abstract

The utility model provides a fan assembly and a portable fan. The fan assembly includes: a fan blade; the motor comprises a stator and a rotor capable of rotating relative to the stator, the stator comprises at least two pairs of windings, and the rotor is arranged around the periphery of the at least two pairs of windings and is connected with the fan blades; and the control chip is electrically connected with the at least two pairs of windings and is used for controlling the rotor to drive the fan blades to rotate by controlling the magnetic field change on the at least two pairs of windings. The motor in the fan assembly is arranged to be arranged with the rotor around the periphery of at least two pairs of windings, so that the motor in the fan assembly has a simple structure and small volume and weight, and the fan assembly is more suitable for a portable fan; through setting up control chip and being connected with at least two pairs of windings electricity for control chip can control the rotor through controlling the magnetic field variation on at least two pairs of windings and drive the flabellum and rotate, and control chip can be better control motor's rotation has promoted fan assembly's rotatory effect.

Description

Fan assembly and portable fan

Technical Field

The present disclosure relates to fan assemblies, and particularly to a fan assembly and a portable fan.

Background

With the development of society, people in recent years are increasingly pursuing more convenient and comfortable life, and in order to meet the demands of people for outdoor activities or other life scenes, various portable fans, such as handheld fans, wearable fans, and the like, are on the market.

A portable fan is provided with a fan assembly, which typically includes a motor. The motor in the prior art is an inner rotor motor, and the inner rotor motor is large in general volume and weight. The utility model relates to a Chinese patent with publication number CN217036846U, and discloses an inner rotor motor which comprises a stator and a rotor, wherein the rotor is arranged in the stator, the stator comprises a shell, a winding and a stator core, and heat dissipation ribs are arranged on the stator core. Because the inner rotor motor can generate heat when running, and normal running can be ensured only by timely radiating, the inner rotor motor is generally provided with radiating ribs, radiating fans and the like for radiating, so that the fan assembly is complex in structure, large in size and weight and not suitable for being applied to the portable fan.

Disclosure of Invention

To ameliorate at least some of the above disadvantages or shortcomings, embodiments of the present utility model provide a fan assembly and a portable fan.

Specifically, an embodiment of the present utility model provides a fan assembly, including: a fan blade; a motor including a stator and a rotor rotatable relative to the stator, the stator including at least two pairs of windings, the rotor being disposed about a periphery of the at least two pairs of windings and connected to the fan blades; and the control chip is electrically connected with the at least two pairs of windings and is used for controlling the rotor to drive the fan blades to rotate by controlling the magnetic field change on the at least two pairs of windings.

In one embodiment of the utility model, the fan assembly further comprises: and the stator is fixed on the circuit board, and the control chip is arranged on the circuit board.

In one embodiment of the utility model, the circuit board is provided with a current input terminal, a ground terminal, and a pulse width modulation terminal, which is electrically connected to the control chip.

In one embodiment of the utility model, each pair of said windings comprises a first winding and a second winding, the winding directions of said first winding and said second winding of each pair of said windings being opposite.

In one embodiment of the present utility model, the stator further includes a motor bracket provided with four winding portions and a first winding wound on the four winding portions to form two pairs of the windings.

In one embodiment of the present utility model, two supporting legs are provided on the motor support, and two ends of the first winding wire are respectively connected to the two supporting legs.

In one embodiment of the present utility model, the stator further includes a motor support provided with six winding portions and three second windings, each of which is wound on two of the winding portions disposed opposite to each other to form a pair of the windings.

In one embodiment of the present utility model, four legs are provided on the motor support, one ends of three second windings are connected to the same leg, and the other ends of three second windings are connected to the other three legs, respectively.

In one embodiment of the utility model, the rotor is provided with two pairs of poles; and/or the thickness of the rotor is less than 0.8 mm.

Another embodiment of the present utility model provides a portable fan, comprising: a housing and a fan assembly as described above, the fan assembly being disposed within the housing.

From the above, the technical features of the present utility model may have one or more of the following advantages: the motor in the fan assembly is arranged to comprise the stator and the rotor which can rotate relative to the stator, the stator comprises at least two pairs of windings, and the rotor is arranged around the periphery of the at least two pairs of windings, namely the motor in the fan assembly is an outer rotor motor, and the fan assembly has the advantages that load pieces such as large moment of inertia, good heat dissipation and winding saving of the windings, fan blades and the like can be directly connected to the rotor, the requirement of small-volume whole machine installation size is met, the motor in the fan assembly is simple in structure, and the size and the weight are small, so that the fan assembly is more suitable for a portable fan; in addition, through setting up at least two pairs of windings electricity on control chip and the stator for control chip can control the rotor through controlling the magnetic field variation on at least two pairs of windings and drive the flabellum and rotate, and control chip can be better control motor's rotation, has further promoted fan assembly's rotation effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a fan assembly according to an embodiment of the present utility model.

Fig. 2 is an exploded view of a fan assembly according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of the stator of fig. 2.

Fig. 4 is a schematic structural view of the motor bracket in fig. 3.

Fig. 5 is a schematic diagram of the stress directions of the two pairs of windings in fig. 2.

Fig. 6 is a schematic structural diagram of the circuit board in fig. 2.

Fig. 7 is an exploded view of another fan assembly according to an embodiment of the present utility model.

Fig. 8 is a schematic structural view of the stator of fig. 7.

Fig. 9 is a schematic structural view of the motor bracket in fig. 8.

Fig. 10 is a schematic structural diagram of a portable fan according to an embodiment of the present utility model.

Fig. 11 is an exploded view of the portable fan of fig. 10.

Number of main elements:

1 is a portable fan; 10 is a fan assembly; 20 is a motor; 100 is a fan blade; 110 is a rotating shaft; 200 is a rotor; 300 is a sleeve; 400 is a stator; 410 is a motor bracket; 411 is a stand bar; 412 is a wire wrapping portion; 420 is a first wire; 430 is a second wire; 423 is a first winding; 424 is the second winding; 440 is a silicon steel sheet; 500 is a circuit board; 501 is a mounting groove; 510 is a control chip; 520 is a current input terminal; 530 is the ground terminal; 540 is a pulse width modulation terminal; 30 is a shell; 301 is a wearing space; 302 is a wearing part; and 303 is the air outlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, a fan assembly 10 according to an embodiment of the present utility model includes: fan blade 100, motor 20, and control chip 510. The motor 20 may, for example, include a stator 400 and a rotor 200, the rotor 200 may rotate relative to the stator 400, the stator 400 includes at least two pairs of windings, the rotor 200 is disposed around a periphery of the at least two pairs of windings, and the rotor 200 is connected with the fan blades 100; the control chip 510 is electrically connected to the at least two pairs of windings, and the control chip 510 is configured to control the rotor 200 to drive the fan blade 100 to rotate by controlling a magnetic field variation on the at least two pairs of windings. Fan blade 100 may, for example, include a hub 110 and a blade 120 disposed on hub 110. The fan blade 100 may be further provided with a rotating shaft 130, for example, the motor 20 may further include a shaft sleeve 300, a first end of the rotating shaft 130 is connected to the fan blade 100, a second end of the rotating shaft 130 is inserted into the shaft sleeve 300, and the second end of the rotating shaft 130 can rotate in the shaft sleeve 300 relative to the shaft sleeve 300; the fan assembly 10 may further include a stationary shaft, for example, which may be provided with a shaft hole in which the shaft sleeve 300 is installed, and the second end of the rotating shaft 130 rotates within the shaft sleeve 300 relative to the stationary shaft.

Rotor 200 may be housed, for example, within hub 110 of fan blade 100. The rotor 200 may be, for example, a rubber magnet ring or a neodymium-iron-boron magnet ring, preferably, the rotor 200 is a neodymium-iron-boron magnet ring. The rotor 200 adopts the neodymium iron boron magnetic ring, and compared with the rubber magnetic ring, the same magnetic flux thickness can be thinner, and a larger space can be provided for the stator 400, so that the stator 400 can be used as a three-phase three-wire motor to reduce power. The thickness of the rubber magnet ring is typically greater than 1mm, the thickness of the neodymium-iron-boron magnet ring may be less than 0.8mm, and preferably the thickness of the rotor 200 provided in this embodiment is less than 0.8 mm.

Referring to fig. 3 and 4, the stator 400 may, for example, further include a motor bracket 410, at least two pairs of windings being disposed on the motor bracket 410. The at least two pairs of windings may, for example, comprise two pairs of windings, each pair comprising a first winding 423 and a second winding 424, for example, the two pairs of windings may, for example, comprise a pair of main windings comprising the first winding 423 and the second winding 424 and a pair of auxiliary windings also comprising the first winding 423 and the second winding 424. As shown in fig. 3, a pair of main windings and a pair of auxiliary windings are disposed on the motor bracket 410 perpendicular to each other, i.e., two first windings 423 of the main windings and the auxiliary windings are disposed adjacent to each other, and two second windings 424 of the main windings and the auxiliary windings are disposed adjacent to each other. The stator 400 may include, for example, a first winding 420 and a silicon steel sheet 440, and the motor bracket 410 may be provided with, for example, four winding portions 421, and the first winding 420 may be, for example, an enamel wire. Enameled wire is a main variety of winding wire, which is formed by two parts of conductor and insulating layer, and bare wire is annealed and softened, painted for many times and baked. The silicon steel sheet 440, also called an electrical steel sheet or a silicon steel sheet, refers to a ferrosilicon soft magnetic alloy with extremely low carbon content (the carbon content is below 0.005% after annealing), and the silicon content is generally 0.5% -4.5%, and the resistivity and the maximum magnetic permeability can be improved by adding silicon into iron. The silicon steel sheet 440 may have multiple layers and be connected to the motor bracket 410, and a portion of the silicon steel sheet 440 may be wrapped in four winding portions 421 of the motor bracket 410, for example, where the outer side of the silicon steel sheet 440 protrudes out of the motor bracket 410, the inner side of the silicon steel sheet 440 protrudes out of the middle hole of the motor bracket 410, the shaft sleeve 300 is accommodated in the middle hole of the motor bracket 410 and is disposed apart from the inner side of the silicon steel sheet 440, and the fixing shaft is clamped and fixed between the shaft sleeve 300 and the inner side of the silicon steel sheet 440. The first winding 420 is sequentially wound on the four winding portions 421 to form a pair of main windings and a pair of auxiliary windings, that is, four windings in the two pairs of windings are wound by one first winding 420, which is equivalent to that the four windings are connected in series, and winding directions of the first winding 423 and the second winding 424 are opposite. The motor bracket 410 is further provided with at least two legs 411, and two ends of the first winding 420 are respectively connected to two of the legs 411.

For example, referring to fig. 5, a pair of main windings may include, for example, a first winding 423 and a second winding 424, a pair of auxiliary windings may include, for example, a first winding 423 of a pair of auxiliary windings, a first winding 423 of a pair of main windings, a position 2, a second winding 424 of a pair of auxiliary windings, and a second winding 424 of a pair of main windings. The winding direction of the first winding 423 of the pair of auxiliary windings may be, for example, counterclockwise, the winding direction of the second winding 424 of the pair of auxiliary windings may be clockwise, the winding direction of the first winding 423 of the pair of main windings may be clockwise, and the winding direction of the second winding 424 of the pair of main windings may be counterclockwise; for example, the winding direction of the first winding 423 of the pair of auxiliary windings may be clockwise, the winding direction of the second winding 424 of the pair of auxiliary windings may be counterclockwise, the winding direction of the first winding 423 of the pair of main windings may be counterclockwise, and the winding direction of the second winding 424 of the pair of main windings may be clockwise; of course, the winding direction of the first winding 423 and the second winding 424 may be adjusted according to different positions of the stator 400. When the motor 20 is powered on, the input current is, for example, a single-phase sinusoidal current, and the pair of main windings generate an alternating pulsating magnetic field, the strength of which varies with time as a sinusoidal current, and the first winding 423 of the pair of main windings at position 2 is, for example, the direction of the magnetic field is, for example, the direction from position 1 to position 3; the control chip 510 phase-shifts the single-phase sinusoidal current, and applies the phase-shifted current to the pair of sub-windings, for example, the first winding 423 of the pair of sub-windings at position 1, and the magnetic field direction thereof is, for example, the direction from position 4 to position 2. After the motor 20 is connected to the power supply, a part of the single-phase sinusoidal current acts on a pair of main windings to supply power, and the other part of the single-phase sinusoidal current is controlled by the control chip 510 to act on a pair of auxiliary windings to supply power after phase shifting, and as the phases of the unidirectional sinusoidal current and the phase-shifted current are in tandem, the magnetic field forces generated by the corresponding pair of main windings and the corresponding pair of auxiliary windings are also in tandem, so that the pair of main windings and the pair of auxiliary windings can sequentially generate thrust, the rotor 200 rotates, and the fan blades 100 are driven to rotate. The control chip 510 controls the magnetic field variation on the two pairs of windings to control the rotor 200 to drive the fan blades 100 to rotate, so that the fan assembly 10 has higher and more stable rotation speed, and the performance of the fan assembly 10 is further improved.

Referring to fig. 6, the fan assembly 10 may further include, for example, a circuit board 500, the stator 400 being fixed to the circuit board 500, and the control chip 510 being disposed on the circuit board 500. The circuit board 500 may be provided with, for example, a current input terminal 520, a ground terminal 530, and a pulse width modulation terminal 540. The current input terminal 520 is electrically connected to a power source for receiving a current input; the grounding terminal 530 is used for grounding; the PWM terminal 540 is electrically connected to the control chip 510, where the control chip 510 may be, for example, a peak FT3206D positive brown wave driving chip, the control chip 510 may be, for example, provided with a PWM signal output pin, and the control chip 510 may output a PWM signal to the PWM terminal 540 through the PWM signal output pin, for example, where the PWM signal is PWM (Pulse width modulation), and the control chip 510 may output PWM signals with different duty cycles, which may implement 1% to 100% of adjustment, and thus may implement a rotational speed of 100 gears of the motor 20. The fan assembly 10 can be further provided with a speed regulating switch, for example, the speed regulating switch is electrically connected with the control chip 510, the control chip 510 can correspondingly output PWM signals with different duty ratios to regulate the speed of the fan assembly 10, the wind speed regulation step of the fan assembly 10 can reach 1%, the stepless speed regulating effect is realized, the speed regulation is more flexible, and the use is more convenient.

The circuit board 500 may be provided with the mounting groove 501, for example, and the control chip 510 is disposed in the mounting groove 501, so that the thickness of the circuit board can be reduced, the assembly is more compact, the volume of the fan assembly 10 is further reduced, and in addition, the distance between the control chip 510 and the winding can be increased, so that the influence of the control chip 510 on the magnetic field of the winding is reduced. It should be understood that other components such as a capacitor, a resistor, and a diode may be further disposed on the circuit board 500, which is not described herein.

Referring to fig. 7, 8 and 9, in one specific implementation of the present embodiment, the difference from the above embodiment mainly lies in: the at least two pairs of windings may also include, for example, three pairs of windings, each pair of windings including a first winding 423 and a second winding 424, the first winding 423 and the second winding 424 being oppositely disposed on the motor mount 410. The stator 400 may include, for example, three second windings 430, the motor bracket 410 is provided with six winding portions 412, the second windings 430 may be, for example, enameled wires, the silicon steel sheets 440 are connected to the motor bracket 410, and portions of the silicon steel sheets 440 may be, for example, wrapped in the six winding portions 421 of the motor bracket 410. Each second winding 430 is wound on two oppositely disposed winding portions 412 to form a pair of windings, the winding directions of the first winding 423 and the second winding 424 in each pair of windings are opposite, the winding directions of the adjacent three first windings 423 are the same, and the winding directions of the adjacent three second windings 424 are the same. The motor bracket 410 may be provided with four legs 411, for example, and one ends of the three second windings 430 are connected together, for example, one ends of the three second windings 430 may be connected to the same leg 411, and the other ends of the three second windings 430 are respectively connected to the other three legs 411. In this embodiment, two pairs of magnetic poles are provided on the corresponding rotor 200, and of course, the rotor 200 may also be provided with one pair of magnetic poles or three pairs of magnetic poles, and the rotor 200 is provided with two pairs of magnetic poles as an optimal scheme, when the rotor 200 is provided with two pairs of magnetic poles, the stator 400 and the rotor 200 may be better matched to make the rotation of the rotor 200 more stable, so that the rotation blocking of the rotor 200 caused by the larger number of magnetic poles of the rotor 200 is avoided.

The three pairs of windings may be connected to a three-phase ac power source, for example, and since the three-phase ac power sources have a phase difference of 120 °, when the three pairs of windings are connected to the three-phase ac power source, the three pairs of windings generate a circular rotating magnetic field to push the rotor 200 to rotate. In this way, the motor 20 of the fan assembly 10 can be directly started, the starting current is small, the rotation inertia of the fan blade 100 is stronger than that of a single-phase motor, and the motor 20 rotates more smoothly; secondly, the motor 20 has a simple structure, and a rotating magnetic field is directly generated by three-phase alternating current induction without arranging elements such as a starting capacitor, a centrifugal switch and the like; in addition, the operation force of the motor 20 is large, the rotation speed of the fan assembly 10 is high and stable, and the noise is small; furthermore, the motor 20 is relatively power-saving, so that the fan assembly 10 is relatively power-saving, and the endurance of the fan assembly 10 is improved.

Referring to fig. 10 and 11, the embodiment of the present utility model further provides a portable fan 1, and the portable fan 1 may be a neck fan, a waist fan, a head fan, a hand fan, or the like. Taking the portable fan 1 as an example of a neck hanging fan, the portable fan 1 may include, for example, a housing 30 and the fan assembly 10 in the above embodiment, where the fan assembly 10 is disposed in the housing 30. The casing 30 encloses and forms a wearing space 301, a wearing portion 302 may be provided on the casing 30, the wearing portion 302 may be worn on a neck of a user, and an air outlet 303 may be further provided on the casing 30, where the air outlet 303 may blow air blown by the fan assembly 10 to two cheeks of the user, for example, but the present embodiment is not limited thereto.

From the above, the technical features of the present utility model may have one or more of the following advantages: by arranging the motor 20 in the fan assembly 10 to comprise the stator 400 and the rotor 200 which can rotate relative to the stator 400, wherein the stator 400 comprises at least two pairs of windings, the rotor 200 is arranged around the periphery of the at least two pairs of windings and is connected with the fan blades 100, namely the motor 20 in the fan assembly 10 is an outer rotor motor, the fan assembly 10 has the advantages that the moment of inertia is large, heat dissipation is good, windings of the windings are saved, the fan blades 100 and other load parts can be directly connected on the rotor 200, the requirement of small-volume whole machine installation size is met, the motor 20 in the fan assembly 10 is simple in structure, and the volume and the weight are small, so that the fan assembly 10 is more suitable for a portable fan; in addition, the control chip 510 is connected with at least two pairs of windings on the stator 400, so that the control chip 510 can control the rotor 200 to drive the fan blade 100 to rotate by controlling the magnetic field variation on the at least two pairs of windings, and the control chip 510 can better control the rotation of the motor 20, thereby further improving the rotation effect of the fan assembly 10.

In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present utility model, and the technical solutions of the embodiments may be arbitrarily combined and matched without conflict in technical features, contradiction in structure, and departure from the purpose of the present utility model.

In the several embodiments provided in the present utility model, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A fan assembly (10), comprising:

a fan blade (100);

-an electric motor (20), the electric motor (20) comprising a stator (400) and a rotor (200) rotatable with respect to the stator (400), the stator (400) comprising at least two pairs of windings, the rotor (200) being arranged around the periphery of the at least two pairs of windings and being connected to the fan blades (100); and

the control chip (510), the control chip (510) with at least two pairs of windings electricity are connected, control chip (510) are used for through controlling the magnetic field variation on at least two pairs of windings in order to control rotor (200) drive flabellum (100) rotates.

2. The fan assembly (10) of claim 1, further comprising: and the stator (400) is fixed on the circuit board (500), and the control chip (510) is arranged on the circuit board (500).

3. The fan assembly (10) of claim 2, wherein the circuit board (500) is provided with a current input terminal (520), a ground terminal (530), and a pulse width modulation terminal (540), the pulse width modulation terminal (540) being electrically connected to the control chip (510).

4. The fan assembly (10) of claim 1 wherein each pair of the windings includes a first winding (423) and a second winding (424), the first winding (423) and the second winding (424) of each pair of the windings being wound in opposite directions.

5. The fan assembly (10) of claim 4, wherein the stator (400) further comprises a motor bracket (410) and a first winding (420), the motor bracket (410) being provided with four winding portions (412), the first winding (420) being wound around the four winding portions (412) to form two pairs of the windings.

6. The fan assembly (10) of claim 5, wherein two legs (411) are provided on the motor bracket (410), and both ends of the first winding wire (420) are connected to the two legs (411), respectively.

7. The fan assembly (10) of claim 4, wherein the stator (400) further comprises a motor bracket (410) and three second windings (430), the motor bracket (410) being provided with six winding portions (412), each of the second windings (430) being wound around two of the winding portions (412) disposed opposite to each other to form a pair of the windings.

8. The fan assembly (10) of claim 7, wherein four legs (411) are provided on the motor bracket (410), one end of three of the second windings (430) is connected to the same leg (411), and the other ends of three of the second windings (430) are respectively connected to the other three legs (411).

9. The fan assembly (10) of claim 7, wherein the rotor (200) is provided with two pairs of poles; and/or the thickness of the rotor (200) is less than 0.8 mm.

10. A portable fan (1), characterized by comprising: a housing (30) and a fan assembly (10) according to any of claims 1-9, the fan assembly (10) being arranged within the housing (30).