CN216199117U

CN216199117U - Airflow generating device and fan thereof

Info

Publication number: CN216199117U
Application number: CN202122406408.7U
Authority: CN
Inventors: 黄近; 唐三荣
Original assignee: Oulali Shenzhen Technology R & D Co ltd
Current assignee: Oulali Shenzhen Technology R & D Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-29
Publication date: 2022-04-05
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses an airflow generating device and a fan thereof, wherein the fan comprises: a housing, a stator assembly, and a rotor assembly. The shell comprises an inner sleeve and an outer sleeve, a central hole is formed in the center of the inner sleeve along the axial direction, and a concave part communicated with the central hole is formed in one end of the inner sleeve; the outer sleeve spacer sleeve is arranged on the outer side of the inner sleeve, a plurality of flow deflectors are arranged between the outer sleeve and the inner sleeve, the flow deflectors are arranged at intervals along the circumferential direction, and a gas channel is formed between every two adjacent flow deflectors. The stator assembly is at least partially secured within the recess of the inner sleeve. The rotor assembly is rotatably arranged in a central hole of the inner sleeve in a penetrating mode, so that the rotor assembly can rotate around the central axis of the central hole relative to the stator assembly, the rotor assembly comprises a rotating shaft, a permanent magnet fixed on the rotating shaft, a bearing assembly and an impeller, and the impeller is a magnesium alloy impeller.

Description

Airflow generating device and fan thereof

Technical Field

The utility model relates to the field of airflow generation devices, in particular to a fan and an airflow generation device with the same.

Background

The airflow generating device (e.g., blower) is designed to take into account a number of factors that affect the end user. For example: the size and weight of the product directly affects the ease with which the product can be used.

The utility model aims to provide a convenient-to-use airflow generation device and a fan thereof.

SUMMERY OF THE UTILITY MODEL

The utility model provides an airflow generating device and a fan thereof, which are used for improving the convenience of use.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

in a first aspect of the present invention, there is provided a fan for generating an air flow, the fan comprising:

the outer shell comprises an inner sleeve and an outer sleeve, a central hole is formed in the center of the inner sleeve along the axial direction, and a concave part communicated with the central hole is formed in one end of the inner sleeve; the outer sleeve is sleeved outside the inner sleeve at intervals, a plurality of flow deflectors are arranged between the outer sleeve and the inner sleeve at intervals along the circumferential direction, and a gas channel is formed between every two adjacent flow deflectors;

a stator assembly at least partially secured within the recess of the inner sleeve;

the rotor assembly is rotatably arranged in the central hole of the inner sleeve in a penetrating mode so that the rotor assembly can rotate around the central axis of the central hole relative to the stator assembly, the rotor assembly comprises a rotating shaft, a permanent magnet fixed on the rotating shaft, a bearing assembly and an impeller, and the impeller is a magnesium alloy impeller.

Further, the stator assembly includes a magnetic core, a winding, and a circuit board;

be equipped with insulating frame or insulating layer on the magnetic core, the winding is in on the insulating frame or the insulating layer of magnetic core, and along with the magnetic core is installed jointly in the depressed part, the circuit board is installed keep away from on the magnetic core the one end of depressed part.

Further, the impeller of the rotor assembly is sleeved at the first end of the rotating shaft, the permanent magnet is sleeved at the second end of the rotating shaft, the bearing assembly is sleeved between the two ends of the rotating shaft, the rotating shaft and the bearing assembly are arranged in the central hole in a penetrating mode, and the permanent magnet is located in the depressed portion and opposite to the stator assembly in the radial direction.

Further, the housing is made of zinc or a zinc alloy.

Further, the impeller comprises a plurality of fan blades, and the impeller is made of magnesium-aluminum alloy or magnesium-lithium alloy.

Furthermore, the flow deflector extends in an inclined manner, and the inclined direction of the flow deflector is opposite to that of the fan blade.

Further, the end surface of the radial inner side of one axial end of the guide vane is flush with the end surface of the radial outer side.

Further, the bearing assembly comprises two ball bearings and a spring, the two ball bearings are respectively positioned at two ends of the central hole, and the spring is positioned between the two ball bearings.

Furthermore, the inner wall of the concave part is provided with a positioning protrusion, the outer wall of the magnetic core is provided with a positioning groove, and the positioning protrusion is clamped with the positioning groove to limit the relative position of the magnetic core and the inner sleeve.

In a second aspect of the present invention, an airflow generating device is provided, which includes the above-mentioned fan.

In the fan provided by the utility model, the stator assembly is arranged in the concave part of the inner sleeve, so that the structure of the fan is more compact, and the weight of the fan can be reduced by using the magnesium alloy impeller.

Drawings

Fig. 1 is a schematic structural diagram of a fan according to an embodiment of the present invention;

FIG. 2 is an exploded view of the blower of FIG. 1;

FIG. 3 is a cross-sectional view of the blower of FIG. 1;

FIG. 4 is a perspective cross-sectional view of the blower of FIG. 1 at another angle;

FIG. 5 is a schematic view of another angle of the housing of the blower of FIG. 2;

FIG. 6 is an exploded view of the stator assembly of the wind turbine shown in FIG. 2;

FIG. 7 is an exploded view of the rotor assembly of the wind turbine shown in FIG. 2.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a fan for generating an air flow according to an embodiment of the present invention includes: the motor comprises a shell 1, a stator assembly 2 fixed in the shell and a rotor assembly 3 rotatably accommodated in the shell. The housing 1 serves as a mounting base for the stator assembly 2 and the rotor assembly 3 and provides a gas flow passage 10 (shown in fig. 3) for the passage of gas. The rotor assembly 3 includes a permanent magnet 34 and an impeller 32, the stator assembly 2 generates an alternating magnetic field in a power-on state, the rotor assembly 3 rotates relative to the stator assembly 2 under the action of the magnetic field generated by the stator assembly, and the rotation of the impeller 32 sucks the outside air into the gas flow channel 10 to generate an air flow.

Specifically, referring to fig. 3 to 5, the outer shell 1 includes an inner sleeve 11 and an outer sleeve 12 which are spaced apart from each other, and a deflector 13 connected between the inner sleeve 11 and the outer sleeve 12.

The inner sleeve 11 is cylindrical, and a center hole 111 is formed at the center of the inner sleeve 11 and extends through the inner sleeve in the axial direction. One end of the inner sleeve 11 has a recess 112 communicating with the central bore 111. The central hole 111 is used for mounting the rotor assembly 3, and the recess 112 is used for mounting the stator assembly 2, the mounting of the stator assembly 2 and the rotor assembly 3 being described in detail below.

It will be appreciated that the particular shape of the inner sleeve 11 is only one embodiment in this embodiment, and in other embodiments the inner sleeve 11 may alternatively have other shapes.

The outer sleeve 12 is cylindrical, and the outer sleeve 12 is sleeved outside the inner sleeve 11. The inner diameter of the outer sleeve 12 is larger than the outer diameter of the inner sleeve 11 so that an annular space is formed between the inner sleeve 11 and the outer sleeve. In this embodiment, the outer sleeve 12 is arranged coaxially with the inner sleeve 11. The end surface of the first end of the outer sleeve 12, i.e. the end surface of the end a in figure 3, is flush with the end surface of the first end of the inner sleeve 11. A recess 112 of the inner sleeve is formed at the first end. The end surface of the second end of the outer sleeve 12 exceeds the end surface of the second end of the inner sleeve, thereby forming a receiving space 110 outside the second end of the inner sleeve 11. The impeller 32 of the rotor assembly 3 is accommodated in the accommodating space 110.

The deflector 13 is disposed in the annular space and extends from the outer wall of the inner sleeve 11 to the inner wall of the outer sleeve 12. The gas channel 10 is formed between two adjacent guide vanes 13. At the first ends of the outer sleeve 12 and the inner sleeve 11, the radially inner end surface and the radially outer end surface of the guide vane are flush, i.e. at the same level.

The stator assembly 2 is fixed in a recess of the inner sleeve, and as shown in fig. 6, the stator assembly 2 includes a magnetic core 21, windings (not shown), and a circuit board 22, and the circuit board 22 may be a PCBA board. An insulating frame or an insulating layer is arranged on the outer side of the magnetic core 21, and the winding is wound on the insulating frame or the insulating layer of the magnetic core 21. The circuit board 22 is mounted on the core 21 at an end (i.e., end B in fig. 6) remote from the recess 112. The circuit board 22 is used for electrical connection with an external power source for power-on and circuit control. During specific assembly, firstly, the winding is wound on the insulating frame or the insulating layer of the magnetic core 21, then, the winding is installed in the concave portion 112 together with the magnetic core 21, and finally, the circuit board 22 is welded at the end B of the magnetic core 21. When the circuit board 22 is energized, the magnetic core 21 and the windings can generate an alternating magnetic field for driving the rotor assembly 3 to rotate.

The stator assembly 2 is partially accommodated in the concave part 112, so that the axial length of the whole fan can be reduced, and the structure is more compact.

In the above embodiment, it is preferable that the inner wall of the recess 112 has a positioning protrusion 1121, the outer wall of the magnetic core 21 has a positioning groove 211, and the positioning protrusion 1121 is engaged with the positioning groove 211 to limit the relative position of the magnetic core 21 and the inner sleeve 11. From this, can fix a position stator assembly 2 to improve the convenience and the stability of stator assembly 2 installation. Preferably, the stator assembly 2 is fixed at the recess 112 by glue to further improve the stability of the stator assembly 2.

The rotor assembly 3 is rotatably inserted into the central hole 111 of the inner sleeve 11 such that the rotor assembly 3 can rotate relative to the stator assembly 2 about the central axis of the central hole 111. Specifically, referring to fig. 7, the rotor assembly 3 includes a rotating shaft 31, the impeller 32, a bearing assembly 33, and the permanent magnet 34. The rotating shaft 31 is a long straight shaft, the impeller 32 is sleeved at a first end (i.e., end C in fig. 7) of the rotating shaft 31, the permanent magnet 34 is sleeved at a position of the rotating shaft 31 adjacent to a second end (i.e., end D in fig. 7), the bearing assembly 33 is sleeved between the first end of the rotating shaft 31 and the permanent magnet, and the rotating shaft 31, together with the bearing assembly 33 and the permanent magnet 34, is inserted into the central hole 111, so that the permanent magnet 34 faces the magnetic core 32.

Wherein, the bearing assembly 33 includes two ball bearings 331 and a spring 332, the two ball bearings 331 are respectively located at two ends of the central hole 111 for rotatably bearing the rotating shaft 31, and the spring 332 is located between the two ball bearings 331 for preloading an outer ring of each ball bearing 331 to reduce wear of the ball bearings 331.

Preferably, the inner ring of the bearing 331 is fixedly bonded to the rotating shaft 31, and the outer ring of the bearing 331 is fixedly bonded to the inner sleeve 11 by glue.

During specific work, the circuit board 22 is electrified, so that the magnetic core 21 is matched with the winding to generate a magnetic field, the permanent magnet 34 rotates around the central axis of the central hole 111 under the action of the magnetic field force, the permanent magnet 34 is utilized to drive the rotating shaft 31 to rotate, the rotating shaft 31 rotates to drive the impeller 32 to rotate, and therefore outside air can be sucked into the air channel 10 to generate air flow. The fan can be applied to various airflow generation devices, such as: hair care appliances such as blowers and thermal qualitative brushes; bathroom accessories such as intelligent toilets, faucets, air drying equipment, showers and the like; household appliances such as dish washers; a blowing device or an air suction device of monitoring equipment, medical equipment or automobile accessories and the like.

In the above embodiment, it is preferable that the housing 1 is made of metal zinc or zinc alloy. Because the metal zinc is an acoustically dull material, the shell 1 can absorb the acoustic frequency generated by the fan during the use of the fan, and therefore, the noise generated by the fan during the use is reduced.

The impeller 32 includes a hub and a plurality of blades 321 extending outwardly from the hub. The impeller 32 is made of a magnesium alloy. The magnesium alloy may be a magnesium aluminum alloy or a magnesium lithium alloy. Fan blade 321 that makes through magnesium alloy is not only the quality lighter, and structural strength is great moreover, can reduce the whole weight of fan on the one hand, and the person of facilitating the use takes, and on the other hand can guarantee that impeller 32 can not appear deformation at rotatory in-process, guarantees the security of using. In the above embodiment, preferably, the guide vane 13 is a curved vane, and the curved direction of the curved vane 13 is opposite to the curved direction of the fan blade 321. Specifically, in this embodiment, referring to fig. 4, the blades 321 of the impeller 32 are inclined in the counterclockwise direction, and the baffle 13 is inclined in the clockwise direction, that is, the inclination directions of the baffle 13 and the blades 321 are opposite. Thus, the outside air sucked from the impeller 32 can more smoothly enter the gas passage 10, reducing air resistance and improving the smoothness of air circulation.

The embodiment of the utility model also provides an airflow generating device which comprises the fan in the embodiment. The wind power component of the air flow generating device is utilized, the whole weight of the air flow generating device can be reduced, meanwhile, noise generated in the using period can be reduced, and the improvement of user experience is facilitated. The air flow generating device can be a hair care appliance such as a blower, a thermal qualitative brush and the like; bathroom accessories such as intelligent toilets, faucets, air drying equipment, showers and the like; household appliances such as dish washers; a blowing device or an air suction device of monitoring equipment, medical equipment or automobile accessories and the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A fan for generating an air flow, the fan comprising:

2. The blower of claim 1, wherein the stator assembly comprises a magnetic core, windings, and a circuit board;

3. The fan of claim 2, wherein the impeller of the rotor assembly is disposed at a first end of the shaft, the permanent magnet is disposed at a second end of the shaft, the bearing assembly is disposed between the two ends of the shaft, the shaft and the bearing assembly are disposed in the central bore, and the permanent magnet is disposed in the recess and radially opposite to the stator assembly.

4. The fan of claim 1 wherein the housing is made of zinc or a zinc alloy.

5. The fan of claim 1 wherein the impeller comprises a plurality of blades, the impeller being made of magnesium aluminum alloy or magnesium lithium alloy.

6. The fan of claim 5 wherein the guide vanes extend in an inclined manner, the inclined direction of the guide vanes being opposite to the inclined direction of the fan blades.

7. The fan of claim 1 wherein a radially inner end surface of the axial end of the guide vane is flush with a radially outer end surface.

8. The fan of claim 1 wherein the bearing assembly comprises two ball bearings and a spring, the two ball bearings being located at respective ends of the central bore, the spring being located between the two ball bearings.

9. The blower of claim 2, wherein the inner wall of the recess has a positioning protrusion, the outer wall of the magnetic core has a positioning groove, and the positioning protrusion is engaged with the positioning groove to limit the relative position of the magnetic core and the inner sleeve.

10. An air flow generating device, comprising a fan as claimed in any one of claims 1 to 9.