CN111725950A

CN111725950A - Fan and dust collector

Info

Publication number: CN111725950A
Application number: CN202010675490.0A
Authority: CN
Inventors: 檀冲; 魏秋红
Original assignee: Xiaogou Electric Internet Technology Beijing Co Ltd
Current assignee: Beijing Puppy Vacuum Cleaner Group Co Ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2020-09-29
Anticipated expiration: 2040-07-14
Also published as: CN111725950B

Abstract

The application provides a fan and dust catcher, the fan includes the casing, fan skeleton, stator module, rotor subassembly and position sensor, this stator module and this rotor subassembly are installed on this fan skeleton, evenly just distribute along circumference and symmetrically on this fan skeleton's lateral wall has a plurality of stator component installing openings, the position sensor installing zone has been seted up on the lateral wall between this stator component installing opening of arbitrary two adjacent, this position sensor adaptation is installed in this position sensor installing zone and just to the rotor magnet of this rotor subassembly. Through this fan for can use position sensor monitoring rotor's position, and use the rotor magnet of rotor subassembly as position sensor's magnet, and need not set up position sensor dedicated permanent magnet alone, reduce manufacturing cycle and cost like this, the reliability of product has been improved in the reduction of part.

Description

Fan and dust collector

Technical Field

The present invention relates to the field of power parts, and more particularly, to a fan and a vacuum cleaner including the same.

Background

In, for example, a vacuum cleaner arrangement, the fan (motor) thereof comprises a stator assembly and a rotor assembly. The stator assembly comprises at least one stator element such as a stator core and a stator framework, and the rotor assembly comprises at least one rotor element such as a rotating shaft and a permanent magnet.

In a brushless motor control system, the commutation of the motor is determined by the position of the rotor, and the position of the rotor needs to be detected by a position sensor, and the efficiency of the motor depends heavily on the synchronization between the phase switching and the rotor position fed back by the hall. In systems that use position sensors (e.g., hall sensors) for rotor position detection, the hall sensors are comprised of a stationary portion and a rotating portion (i.e., a sensor stator and a sensor rotor). At present, a brushless motor is generally adopted, a permanent magnet rotor special for a sensor is additionally arranged on a rotating shaft of the motor, and the permanent magnet rotor needs to have the same pole number as that of the motor rotor and rotate together with the motor rotor. However, this method additionally increases the number of parts of the motor, which leads to an increase in time and economic costs of the product and a decrease in reliability.

Disclosure of Invention

To the problem among the above-mentioned prior art, this application has provided a novel fan and has contained the dust catcher of this fan, and it can guarantee position sensor's installation accuracy, does not need the special magnet of independent installation position sensor again.

In a first aspect, the present application provides a fan, which includes a housing, a fan frame, a stator assembly, a rotor assembly, and a position sensor, where the stator assembly and the rotor assembly are installed on the fan frame, a plurality of stator element installation openings are uniformly and symmetrically distributed along a circumferential direction on a sidewall of the fan frame, a position sensor installation area is provided on a sidewall between any two adjacent stator element installation openings, and the position sensor is installed in the position sensor installation area in an adaptive manner and is directly opposite to a rotor magnet of the rotor assembly. Through this fan for can use position sensor monitoring rotor's position, and use the rotor magnet of rotor subassembly as position sensor's magnet, and need not set up position sensor dedicated permanent magnet alone, reduce manufacturing cycle and cost like this, the reliability of product has been improved in the reduction of part.

In one embodiment of the first aspect, the position sensor includes a sensor body and at least one pin extending from the sensor body, the position sensor mounting region includes: a position sensor mounting hole for fitting the position sensor body, the sensor body facing the rotor magnet; and a position sensor mounting groove axially opened above the position sensor mounting hole and communicated with the position sensor mounting hole to fit and protect the at least one pin. Through this embodiment, the setting of mounting hole makes the clearance between position sensor and the rotor magnet keep in reasonable scope to position sensor mounting groove can play the effect of protection to the lead wire of connecting the pin.

In one embodiment of the first aspect, the position sensor is housed in a position sensor protective sleeve to form a position sensor assembly that fits in the position sensor mounting area. Through the embodiment, the position sensor can be protected in the installation process, and possible damage in the installation and operation processes is prevented.

In one embodiment of the first aspect, the position sensor mounting hole is a tapered structure from the outside inward in the radial direction. Through this embodiment, can guarantee that the position sensor subassembly installation back can not drop because of the vibration that the motor produced when transportation or operation and entangle inside the fan.

In one embodiment of the first aspect, the tolerance of the angle between the side surface of the position sensor mounting hole and the toothed plane of the stator core is ± 1 degree. With this embodiment, the mounting accuracy of the position sensor can be strictly ensured.

In one embodiment of the first aspect, the position sensor assembly is fixedly mounted in the position sensor mounting hole and the position sensor mounting groove by an adhesive.

In one embodiment of the first aspect, the position sensor is a hall sensor.

In one embodiment of the first aspect, the fan frame is housed in the housing, and the end wall and the side wall of the housing together form an air inlet, and the opening of the air inlet is shaped as an inwardly concave scoop to allow wind to enter the housing in multiple directions. Through this embodiment, can form sharp air current passageway, the air current can flow effectively and treat refrigerated part through all fans, has further improved the cooling effect to fan internal element, has promoted the performance and the life of fan.

In one embodiment of the first aspect, the blower skeleton includes an impeller shroud, a first bearing seat, a second bearing seat, and a center post for receiving the stator assembly, the center post having a positioning member that axially defines a mounting position of the stator assembly on the center post. Through this embodiment, can fix a position stator module's axial mounted position, make the axial center coincidence of stator module and rotor permanent magnet, reduce the magnetic pull force because of the misalignment production, reduce the noise.

In a second aspect, the present application also provides a vacuum cleaner comprising the blower of any one of the first aspect and embodiments thereof.

The application provides a fan and dust catcher compares in prior art, has following beneficial effect:

1) the position sensor can accurately detect the position of the rotor under the condition that a special magnet special for the position sensor is not required to be arranged independently;

2) the mounting precision of the position sensor can be ensured, and the influence on the performance of the motor caused by the position electric angle error of the rotor caused by position deviation is avoided;

3) the shell is provided with a multi-directional air inlet, and the air inlet enables air entering the shell to blow to the stator assembly along a substantially linear direction and blow to the rotor assembly and the fan framework along a substantially radial direction, so that the cooling effect is further enhanced, and the performance of the fan is improved;

4) the axial installation position of the stator assembly can be positioned, so that the axial centers of the stator assembly and the rotor permanent magnet are overlapped, the magnetic tension generated by the misalignment is reduced, and the noise is reduced.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 shows a schematic structural diagram of a wind turbine according to an embodiment of the present invention;

FIG. 2 shows a schematic view of an explosive structure of a wind turbine according to an embodiment of the invention;

FIG. 3 shows a schematic structural view of a rotor assembly according to an embodiment of the present invention;

FIGS. 4 and 5 show perspective views of a wind turbine skeleton according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fan frame in an assembled state according to an embodiment of the invention;

FIG. 7 shows a schematic structural diagram of a position sensor of an embodiment of the present invention;

FIG. 8 shows a schematic structural diagram of a position sensor assembly according to an embodiment of the invention;

FIG. 9 shows a schematic structural view of a stator assembly according to an embodiment of the invention;

FIG. 10 shows a schematic structural view of a stator element according to an embodiment of the invention;

fig. 11 shows a schematic structural view of a stator core according to an embodiment of the present invention;

FIG. 12 shows a perspective view of a housing according to an embodiment of the invention;

FIG. 13 shows a top view of a housing according to an embodiment of the invention;

FIG. 14 shows a cross-sectional view of a blower according to an embodiment of the invention taken along line I-I of FIG. 1;

FIG. 15 shows a close-up view of region D of FIG. 14, in accordance with an embodiment of the present invention.

List of reference numerals:

100-a fan; 110-a housing; 111-a cylinder; 112-a mount; 113-mounting a beam; 1121-mounting holes; 1122-alignment bumps; 1111-air inlet; 114-a bump; 120-a fan framework; 121-impeller shroud; 1211-skeleton wind-guiding surface; 122-a first bearing seat; 123-a second bearing seat; 1231-alignment groove; 124-a central column; 124A-side column; 124C — first side rib; 124D-second side rib; 125-stator element mounting openings; 127-a positioning member; 129-position sensor mounting hole; 129A-position sensor mounting groove; 129B-a groove limiting surface; 1291-side of mounting hole; 130-a stator assembly; 131-a stator element; 132-a stator core; 1321-a winding portion; 1321' -a third arc surface; 1322-a first toothed flat surface; 1323-second toothed flat surface; 1324-a first extension; 1324' a first arc surface; 1325-a second extension; 1325' -a second arc surface; 1326-a first projection; 1327-a second projection; 133-a bobbin; 1331-a first spool; 1332-a second bobbin; a fourth arc surface 1322'; a fifth circular arc surface 1323'; 134-winding; 140-a rotor assembly; 141-a rotating shaft; 142-a permanent magnet; 143-a first bearing; 144-a second bearing; 145-impeller; 146-a rotor sensor magnet; 150-a guide vane wheel; 160-a position sensor assembly; 161-position sensor protective sleeve; 162-position sensor; 1621-a sensor body; 1622-pin.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1 and 2 are an assembly schematic view and an explosion schematic view of a wind turbine 100 according to the present invention, respectively. As shown in fig. 1, the wind turbine 100 includes a housing 110, a wind turbine frame 120, a stator assembly 130, a rotor assembly 140, and a guide vane 150. In the assembled blower 100, the guide impeller 150 is attached to one side of the blower skeleton 120, the housing 110 is mounted around the outside of the other side of the blower skeleton 120, the rotor assembly 140 is positioned inside the blower skeleton 120 and mounted to the blower skeleton 120, and the stator assembly 130 is mounted within the plurality of stator element mounting openings of the blower skeleton 120 to surround the rotor assembly 120.

As shown in fig. 3, the rotor assembly 140 includes a rotating shaft 141, at least one permanent magnet 142 circumferentially arranged around the rotating shaft 141, a pair of balancing rings positioned at both sides of the permanent magnet 142, a first bearing 143, a second bearing 144, and an impeller 145. The first and

second bearings

143 and 144 are installed on the rotating shaft 141, the permanent magnet 142 and the balance rings on both sides, i.e., outside the pair of balance rings, respectively. The impeller 145 is fixedly provided at one end of the rotation shaft 141, and the rotor sensor magnet 146 is installed at the other end of the rotation shaft 141.

When the rotor assembly 140 is installed inside the blower skeleton 120, the first bearing 143 is located in the first bearing seat 122 of the blower skeleton 120 corresponding thereto, and the second bearing 144 is located in the second bearing seat 123 of the blower skeleton 120 corresponding thereto.

The connection between the bearing and the corresponding bearing seat can be realized here in various ways, for example by means of an adhesive connection, a snap connection or a screw connection. In this embodiment, the second bearing seat 123 is fixedly connected to the second bearing 144, preferably, fixed by an adhesive, so as to absorb an axial force, thereby preventing axial movement, enabling the fan to maintain good performance when rotating at a high speed, and prolonging the service life of the fan. In the present embodiment, the first bearing seat 122 is flexibly mounted with the first bearing 143, and preferably, the inner surface of the first bearing seat 122 is coated with rubber, so as to effectively bear and absorb the radial force suffered by the motor during operation.

As shown in fig. 4-6, the blower skeleton 120 may include an impeller shroud 121, a first bearing housing 122, a second bearing housing 123, and an elongated center post 124 for receiving at least one stator element 131 of a stator assembly 130. In describing the fan frame 120 of the present application, it is defined that the side adjacent to the impeller shroud is up and the opposite side is down. A first bearing seat 122 and a second bearing seat 123 are formed at both ends of an elongated center column 124 in the axial direction. The elongated center post 124 includes a plurality of side posts 124A extending in an axial direction, a stator element mounting opening 125 formed between adjacent two of the side posts 124A to receive a stator element 131 (described in detail later), and an alignment groove 1231 formed at the second bearing seat 123 of the center post 124 through which the housing 110 (described in detail later) is engaged.

In an embodiment of the present invention, as shown in fig. 4, each side post 124A includes side ribs on both sides, a first side rib 124C and a second side rib 124D, which extend along the length direction of the side post.

Preferably, at least one pair (preferably four in the present embodiment) of side posts 124A are disposed uniformly and equally spaced around the center post 124, the opposing two side posts 124A being symmetrical about the rotational axis, and a stator element mounting opening 125 being formed between the adjacent two side posts 124A. That is, in the present embodiment, four stator element mounting openings 125 are formed on a sidewall of the center post 124 to receive four stator elements 131, respectively, the four stator elements 131 collectively constituting the stator assembly 130 of the present invention.

Preferably, in the stator element mounting opening 125, a positioning member 127 extending in the axial direction is provided on the first side rib 124C near the first bearing seat 122 to define an axial mounting position of the stator element 131, so that the stator element 131 coincides with the axial center of the permanent magnet 142, that is, the axis of the stator element 131 coincides with the axis of the permanent magnet 142, thereby reducing a magnetic pulling force due to the misalignment, and achieving an effect of reducing noise.

Preferably, after the stator element 131 is positioned by the fan frame 120 and the positioning member 127, the stator element 131 is stuck to the fan frame 120 and the stator element 131 is stuck to the positioning member 127 by using an adhesive, so that the stator element 131 is prevented from moving outwards to affect the structural stability.

More preferably, in two opposite stator element mounting openings 125 symmetrically distributed, positioning members 127 of the same gauge and height are provided at the side ribs close to the first bearing seats 122 to define the axial mounting position of the stator element 131 in the respective stator element mounting opening 125.

Most preferably, the positioning members 127 of the same size and height are provided on all the side ribs of the center post 124, thereby defining the axial mounting positions of all the stator elements 131 in all the stator element mounting openings 125 in the most accurate manner.

Preferably, in one embodiment of the present invention, the positioning member 127 is configured as a limit projection extending in the axial direction.

The fan frame 120 is of an integral structure, that is, the fan frame 120 is used as an integral part during assembly, wherein the impeller cover 121, the first bearing seat 122, the second bearing seat 123 and the arc surface of the side column 124A for mounting and positioning the stator element maintain high coaxiality, so that the stator assembly 130 and the rotor assembly 140 of the fan 100 maintain high coaxiality, and the accumulated error and the increase of volume and weight caused by the split design are reduced.

As further shown in fig. 4 and 5, a position sensor mounting area is further opened on the side column 124A (i.e., the side wall of the fan frame 120) between any two adjacent stator element mounting openings 125 of the fan frame 120, that is, a position sensor mounting area is opened between the first side rib 124C and the second side rib 124D of the side column 124A. As best shown in fig. 5, the position sensor mounting area includes a position sensor mounting hole 129 and a position sensor mounting recess 129A.

The position sensor mounting hole 129 includes a mounting hole side face 1291 and a mounting hole bottom face. In the installed state, the position sensor mounting hole 129 is used to receive and secure a position sensor assembly 160, wherein the position sensor assembly 160 includes a position sensor protective sleeve 161 and a position sensor 162.

As shown in fig. 7 and 8, the position sensor assembly 160 of the wind turbine 100 provided by the present invention includes a position sensor protective sleeve 161 and a position sensor 162 housed in the position sensor protective sleeve 161.

As shown in fig. 7, the position sensor 162 is a schematic structural diagram, in an exemplary embodiment herein, the position sensor 162 is a hall sensor, and includes a sensor main body 1621 and at least one pin 1622 (three in the figure) extending from the sensor main body 1621, the at least one pin 1622 is used for connecting a controller in an assembled state, the sensor main body 1621 can detect a position of a rotor in the wind turbine and feed the position information to the controller through the pin 1622, and the controller can control phase change of the wind turbine 100 according to the position information. It should be understood that the hall sensor is merely an illustrative example given for illustrative purposes, and those skilled in the art will appreciate that other types of position sensors having similar structures should also be capable of being adapted for use with the arrangements herein.

Fig. 8 shows an assembly diagram of the position sensor assembly 160, in which (a) is a diagram of the position sensor 162 and the position sensor protection sleeve 161 to be assembled, and (b) is a diagram of an assembly state in which the position sensor 162 is accommodated in the position sensor protection sleeve 161. The position sensor protective sleeve 161 has a shape similar to the position sensor 161, and includes a first part and a second part penetrating, the first part is used for accommodating and protecting at least one pin 1622 and a lead wire welded with the pin 1622, the end of the pin or the lead wire can extend out of the first part to be connected with a controller, the second part is used for accommodating and protecting a sensor main body 1621, and one side surface of the second part is at least partially provided with an opening, so that the sensor main body 1621 accommodated in the second part can be opposite to the permanent magnet of the rotor assembly when being assembled on the fan framework 120, and a reasonable gap is kept between the sensor main body and the permanent magnet of the rotor assembly.

Preferably, the outer wall surface of the position sensor protective sleeve 161 is arc-shaped, and the curvature thereof is equal to the curvature of the outer wall surface of the second bearing housing.

The position sensor mounting hole 129 is a through hole structure and has a shape similar to the size and shape of the position sensor protective sheath 161 or the position sensor body 1621 as viewed in the radial direction, such that when the second portion of the position sensor assembly 160 and the sensor body 1621 are fittingly mounted in the position sensor mounting hole 129, the front face of the sensor body 1621 faces the magnet of the rotor assembly. In this way, the magnet of the rotor assembly can function as a permanent magnet unit of the position sensor 160, thus avoiding a separate dedicated magnet for the position sensor, saving parts, and improving the reliability of the apparatus while reducing the manufacturing time and cost.

It will be appreciated that the permanent magnets 142 of the rotor assembly 140 are arranged axially about the rotational axis 141, and that the permanent magnets 142 cover a portion of the length of the rotational axis 141, as mentioned above in connection with fig. 3. In the case where the position sensor body 1621 faces the magnet of the rotor assembly, that is, the region for which the position sensor body 1621 is located within the range covered by the permanent magnet in the axial direction.

In this respect, it will be understood by those skilled in the art that in the case of applications where the main body size is small (such as the vacuum cleaner of the present application), the accuracy of the mechanical angle of the mounting position of the position sensor is critical. Otherwise, a slight deviation would result in a large error in the electrical angle of the rotor position, affecting motor performance. In severe cases, it may even lead to confusion in commutation logic, resulting in damage to the controller and motor. The smaller the motor size, the more serious the position sensor mounting position tolerance problem. Therefore, the position sensor mounting hole 129 needs to be configured such that the angle of the mounting hole side surface (i.e., the positioning surface) 1291 with the tooth-shaped

planes

1322 and 1323 of the stator core adjacent thereto needs to be within a certain tolerance. Preferably, the tolerance is ± 1 degree. Those skilled in the art will appreciate that the angle between the fan and the stator cores may be different, and the tolerance requirements may be different, depending on the size of the fan and the number of stator cores. Through the mode, the position sensor mounting hole 129 can be accurately positioned on the fan framework 120, and the mounting precision of the position sensor 162 is improved.

Referring back to fig. 5, the position sensor mounting hole 129 is preferably a tapered structure, i.e. an inverted trumpet structure with a large outside and a small inside, when viewed from the outside to the inside in the radial direction of the fan frame 120, so as to ensure that the position sensor assembly 160 is mounted without falling off and twisting into the inside of the fan due to vibration generated during transportation or operation of the fan.

In fig. 5, the position sensor mounting recess 129A is opened through the outer wall of the second bearing housing 123 above the position sensor mounting hole 129, and the position sensor mounting recess 129A communicates with the position sensor mounting hole 129 to receive the position sensor assembly 160 therein. In a state where the position sensor unit 160 is mounted on the position sensor mounting area (fig. 6), the outer side surface of the first portion of the position sensor unit 160 abuts against the groove stopper surface (i.e., the groove bottom surface) 129B of the position sensor mounting groove 129A to ensure that the movement of the position sensor unit 160 in the radial direction is restricted, so that the gap between the lower position sensor 162 and the rotor magnet facing thereto is maintained within a reasonable range, and the position sensor 162 can detect the position information of the rotor. Those skilled in the art will also appreciate that the gap will vary depending on the fan size.

Optionally, the position sensor assembly 160 is fixedly coupled to the position sensor mounting hole 129 and/or the position sensor mounting recess 129A using an adhesive. In this way, possible damage to the internally housed position sensor using mechanical connection means can be avoided.

Hereinafter, the stator assembly 130 will be described in detail with reference to fig. 9 to 11.

Fig. 9 is a schematic view of the stator elements 131 of the stator assembly 130 evenly arranged around the permanent magnets, and in a preferred embodiment of the present invention, the stator assembly 130 includes four stator elements 131. Fig. 10 is a schematic view of one of the stator elements 131 of the stator assembly 130 of the present invention. As shown in fig. 9, the stator element 131 includes a stator core 132, a bobbin 133, and windings 134, wherein the bobbin 133 (composed of a first bobbin 1331 and a second bobbin 1332 as shown in fig. 10) is detachably fixed to the stator core 132 to enable the windings 134 to form a stator coil around the bobbin 133 (or the stator core 132).

Fig. 11 is a schematic structural view of the stator core 132. The stator core 132 has a "pi" shaped structure formed by a winding portion 1321, a first tooth-shaped plane 1322 and a second tooth-shaped plane 1323 which are parallel to each other. In which the winding portion 1321 may be formed to protrude along left and right sides or at the rear, it is preferable herein that the winding portion 1321 is formed to extend along left and right sides, forming the first and

second extensions

1324 and 1325. At least one of the first circular arc surface 1324 ' and the second circular arc surface 1325 ' of the first extension portion 1324 and the second extension portion 1325 has the same radius of curvature as the third circular arc surface 1321 ' of the winding portion inner side surface therebetween. And the first circular arc surface 1324 'and the second circular arc surface 1325' are attached to the top surface of the side rib of the side column 124A of the fan frame 120 (which has the same curvature as the first circular arc surface and the second circular arc surface), so that the fourth circular arc surface 1322 'and the fifth circular arc surface 1323' at the end portions of the first tooth-shaped plane 1322 and the second tooth-shaped plane 1323 maintain high coaxiality with the rotor permanent magnet 142 mounted in the fan frame, and at the same time, the radial movement of the stator core 132 toward the permanent magnet 142 can be suppressed. The ends of the first tooth-shaped plane 1322 and the second tooth-shaped plane 1323 are respectively provided with a first protrusion 1326 and a second protrusion 1327, the first protrusion 1326 protrudes from the inner wall of the first tooth-shaped plane 1322 toward the second tooth-shaped plane 1323, and the second protrusion 1327 protrudes from the inner wall of the second tooth-shaped plane 1323 toward the first tooth-shaped plane 1322.

As shown in fig. 11, the distance between the first extending portion 1324 and the first tooth-shaped plane 1322 is d1, and the distance between the second extending portion 1325 and the second tooth-shaped plane 1323 is d2, preferably, d1 is equal to d 2.

The stator core 132 has a laminated structure and is formed by laminating electrical silicon steel sheets using a tooling mold. The sheets may be fixed together by welding or by applying an adhesive.

Compared with the prior art, the stator core 132 with the first extension portion 1324 and the second extension portion 1325 has the advantages that the processing technology is simpler, and meanwhile, the surface area of the stator core 132 exposed to the air is increased due to the arrangement of the extension portions, so that heat dissipation is facilitated.

The structure of the stator assembly, the rotor assembly, and the blower frame are described in detail above, and in the present application, these components are all mounted in the blower housing. Next, a fan housing of an embodiment of the present invention will be described in detail with reference to fig. 12 and 13. Fig. 12 is a schematic structural diagram of the housing 110 according to the present invention.

As shown, the housing 110 includes a cylinder 111, a mount 112, and a mount beam 113, the mount beam 113 connecting the cylinder to the mount 112, in other words, the mount beam 113 supporting the mount 112 away from the cylinder 111 such that an intake space is formed between the mount 112 and the cylinder 111. The cross section of the mounting seat is formed into a polygonal shape with at least one concave side. Thus, an inwardly concave scoop-shaped air intake 1111 may be formed between the mounting seat and the barrel, the arrangement of this shape may allow wind to enter the housing in multiple directions. In the present embodiment, the mounting seat is formed in a quadrangular shape with concave edges. Specifically, the mounting beams 113 are arranged in plural (preferably in pairs, four in the present embodiment) along the circumferential direction of the mount 112 and the cylinder 111. One end of each mounting beam 113 is connected with the cylinder 111, the other end of each mounting beam 113 is connected with four corners of the mounting base 112, a protruding portion extending inwards along the radial direction of the mounting cylinder is formed at the end, connected with the mounting base, of each mounting beam 113, the diameter of the circumscribed circle of the mounting base is smaller than the outer diameter of the mounting cylinder, and therefore multidirectional air inlets 1111 distributed along the circumferential direction are formed between the mounting base 112 and the cylinder 111 of the shell 110. The air inlet enables air entering the shell to blow towards the stator assembly along the approximate linear direction and blow towards the rotor assembly and the fan framework along the approximate radial direction. In other embodiments, the mounting beam 113 may also extend out of the mounting seat 112 along the axial direction of the cylinder, and the extended portion may be used to support components of the circuit board, so that an air inlet space may be formed between the circuit board and the mounting seat 112 to cool the circuit board.

Preferably, as shown in fig. 13, the edge of the mounting seat 112 forming the air inlet is of a circular arc structure, and the edge of the cylinder forming the top of the air inlet is also of a circular arc structure, so that the air flow can smoothly enter the fan 100, and the noise is reduced while cooling the device.

In fig. 13, in a preferred embodiment of the present invention, a mounting hole 1121 is centrally provided on the mounting base 112, and the second bearing base 123 of the fan frame 120 is engaged with the mounting hole 1121 when the fan 100 of the present application is assembled. Further, an alignment protrusion 1122 (fig. 13) is provided on an inner sidewall of the mounting hole 1121 of the housing 110, and the alignment protrusion 1122 is positioned on the inner sidewall so as to be capable of engaging with an alignment groove 1231 formed on the circumference of the second bearing seat 123 of the fan frame 120, so that the rotation of the housing 110 relative to the fan frame 120 about the rotation axis can be restricted. Enabling the air intake to align with the stator assembly 130 inside the blower 100, further improving the cooling effect.

A projection 114 is provided along the circumferential direction at one end of the casing 110 where the mounting beam and the mounting seat are not provided, and correspondingly, a groove is provided along the circumferential direction at the lower portion of the impeller cover 121 of the fan frame 120. Further positioning of the housing 110 and fan frame 120 is achieved by inserting the projections 114 into the channels when assembling the fan 100. That is, the positioning and assembling of the housing 110 and the fan frame 120 can be more conveniently realized by the engagement of the protrusion 114 and the groove and the engagement of the alignment bump 1114 and the alignment groove 1231.

During positioning and assembling, in order to ensure the working performance of the fan 100, sealing requirements are met when partial parts are installed. The housing 110 and fan frame 120, as used herein, are mounted to ensure that air flow cannot escape therefrom. Quantitative adhesive can be added into the groove 1212 in advance, when the protrusion 114 is pushed in, the adhesive can overflow along the inner wall and the outer wall of the protrusion 114, so that the inner wall and the outer wall can form a complete sealing film, and the double-layer sealing effect is achieved.

Next, the air flow path of the embodiment of the present invention will be described in detail with reference to fig. 14 and 15.

In fig. 14, a part of the air flow enters the inside of the fan 100 from the outside of the air inlet 1111 of the present invention, passes through the stator assembly 130 in the axial direction to reach the skeleton air guiding surface 1211 on the inside of the impeller cover 121, and the skeleton air guiding surface 1211 is composed of at least two sub-arc surfaces (as shown in fig. 15), so as to form a smooth air flow guiding path. The skeleton wind guide surface has an aerodynamic shape, so that wind resistance is effectively reduced, and turbulence and noise in a fan are reduced.

On the other hand, a part of the air flow enters the interior of the fan 100 from the air inlet of the present invention, passes through the balance ring, the permanent magnet 142, the stator assembly 140, and finally is discharged from one end of the stator element mounting opening 125 close to the impeller. Since this wind will pass through almost all of the heat generating components, a large portion of the heat within fan 100 is carried away.

Compared with the heat dissipation mode that the shell is provided with the holes in the prior art, the shell is provided with the multi-directional air inlet, and the air inlet enables air entering the shell to blow to the stator assembly along a substantially linear direction and blow to the rotor assembly and the fan framework along a substantially radial direction, so that the cooling effect is further enhanced, the performance of the fan is improved, and the service life of the fan is prolonged; the edge of the air inlet is at least formed by a section of arc surface, so that air flow smoothly enters the fan, and wind noise is reduced.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. The utility model provides a fan, its includes casing, fan skeleton, stator module, rotor subassembly and position sensor, stator module with the rotor subassembly is installed on the fan skeleton, its characterized in that evenly just distributes symmetrically along circumference on the lateral wall of fan skeleton has a plurality of stator component installing openings, and is two arbitrary adjacent position sensor installing area has been seted up on the lateral wall between the stator component installing opening, the position sensor adaptation is installed just right in the position sensor installing area rotor magnet of rotor subassembly.

2. The blower of claim 1, wherein the position sensor includes a sensor body and at least one pin extending from the sensor body, the position sensor mounting area comprising:

a position sensor mounting hole for fitting the position sensor body, the sensor body facing the rotor magnet; and

and the position sensor mounting groove is axially arranged above the position sensor mounting hole and communicated with the position sensor mounting hole so as to be matched with and protect the at least one pin.

3. The wind turbine of claim 2, wherein the position sensor is housed in a position sensor protective sleeve to form a position sensor assembly that fits in the position sensor mounting area.

4. The wind turbine of claim 3, wherein the position sensor mounting hole is tapered in a radial direction from the outside inward.

5. The wind turbine of claim 3 or 4, wherein the position sensor assembly is fixedly mounted in the position sensor mounting hole and the position sensor mounting groove by an adhesive.

6. The fan according to any one of claims 2 to 4, wherein an included angle between a side surface of the position sensor mounting hole and a tooth-shaped plane of the stator core has a tolerance of ± 1 degree.

7. The fan of any one of claims 1 to 4 wherein the position sensor is a Hall sensor.

8. The fan of any one of claims 1 to 4, wherein the fan frame is accommodated in the housing, and an end wall and a side wall of the housing together form an air inlet, and an opening of the air inlet is shaped like a scoop which is inwardly concave so that the wind enters the housing in a plurality of directions.

9. The blower of any one of claims 1-4, wherein the blower skeleton comprises an impeller shroud, a first bearing seat, a second bearing seat, and a center column for receiving a stator assembly, the center column having a positioning member that axially defines a mounting position of the stator assembly on the center column.

10. A vacuum cleaner, characterized in that it comprises a fan according to any one of claims 1 to 9.