CN220015576U - Blower fan, smoke exhaust ventilator and integrated kitchen - Google Patents

Abstract

The disclosure relates to a fan, a smoke exhaust ventilator and an integrated kitchen, and belongs to the technical field of mechanical equipment. The fan comprises a rotor impeller assembly and a stator assembly; the rotor impeller assembly comprises a hub, a fixing plate, a plurality of permanent magnets and a multi-wing impeller, wherein the fixing plate is positioned on the outer ring of the hub and is connected with the hub, the plurality of permanent magnets are circumferentially distributed on the fixing plate and are connected with the fixing plate, and the multi-wing impeller is positioned on the outer ring of the fixing plate and is connected with the fixing plate; the stator assembly comprises a shaft body and a stator assembly, the shaft body is rotationally connected with the inner ring of the hub, and the stator assembly corresponds to the positions of the plurality of permanent magnets and is connected with the shaft body. By adopting the fan, the axial size of the fan can be reduced, and the fan tends to be flattened.

Description

Blower fan, smoke exhaust ventilator and integrated kitchen

Technical Field

The disclosure relates to the technical field of mechanical equipment, in particular to a fan smoke exhaust ventilator and an integrated kitchen.

Background

Nowadays, integrated stoves have become a mainstream choice for home improvement installation due to their advantages such as multiple functions. The integrated kitchen comprises a kitchen ventilator, a gas kitchen, a sterilizing cabinet, a storage cabinet, an oven, a dish-washing machine and the like. Wherein the design of the range hood tends to flatten in order to reserve sufficient space for the storage bin and the dishwasher.

In a range hood, the size of the fan directly determines the size of the range hood. Currently, fans generally include a motor with an output shaft extending beyond the motor and an impeller connected to the portion of the output shaft extending beyond the motor.

However, in the structure of the above-described blower, the axial dimension of the blower is equal to the sum of the axial dimension of the motor and the axial dimension of the impeller, resulting in a larger axial dimension of the blower, which is disadvantageous for flattening.

Disclosure of Invention

The embodiment of the disclosure provides a fan, a smoke exhaust ventilator and an integrated stove, which can solve the technical problems existing in the related art, and the technical scheme is as follows:

in a first aspect, embodiments of the present disclosure provide a wind turbine comprising a rotor wheel assembly and a stator assembly;

the rotor impeller assembly comprises a hub, a fixing plate, a plurality of permanent magnets and a multi-wing impeller, wherein the fixing plate is positioned on the outer ring of the hub and is connected with the hub, the plurality of permanent magnets are circumferentially distributed on the fixing plate and are connected with the fixing plate, and the multi-wing impeller is positioned on the outer ring of the fixing plate and is connected with the fixing plate;

the stator assembly comprises a shaft body and a stator assembly, the shaft body is rotationally connected with the inner ring of the hub, and the stator assembly corresponds to the positions of the plurality of permanent magnets and is connected with the shaft body.

In one possible implementation manner, the fixing plate and the outer ring of the hub enclose an annular groove, and the plurality of permanent magnets are located in the annular groove, circumferentially distributed around the hub, and connected with the bottom of the annular groove;

the stator assembly is located in the annular groove.

In one possible implementation, the polarities of the ends of adjacent two permanent magnets remote from the slot bottom are opposite.

In one possible implementation, the stator assembly includes a stator back plate, a plurality of stator cores, and a plurality of stator windings;

the third surface of the stator backboard is connected with the shaft body;

the stator cores are located on the third surface, circumferentially distributed around the shaft body and connected with the stator back plate;

each stator winding is wound on at least one of the stator cores.

In one possible implementation, the shaft body is coaxial with the hub;

the distance from the geometric center of each permanent magnet to the axis of the hub is equal to the distance from the geometric center of each stator core to the axis of the shaft body.

In one possible implementation, the magnetic flux direction of the stator winding is parallel to the axis of the shaft body.

In one possible implementation, the stator winding includes a wire and an insulating coating uniformly distributed on an outer wall of the wire.

In one possible embodiment, the shaft body is rotatably connected to the inner ring of the hub by means of a bearing.

In one possible implementation, the bearing is a deep groove ball bearing.

In one possible implementation, the fan further includes a volute that is looped over the multi-winged impeller and connected to the stator assembly.

In one possible implementation manner, a distance from an end of the multi-wing impeller away from the fixed plate to the fixed plate is a first value, an axial length of the shaft body is a second value, and the first value is greater than the second value.

In a second aspect, embodiments of the present disclosure provide a range hood, where the range hood includes the blower of the first aspect and its possible implementation forms, and the range hood further includes a console and an oil pipe;

the control console is used for controlling the fan access circuit and the output power of the fan;

one end of the oil pipe is communicated with the air outlet of the volute, and the other end of the oil pipe is communicated with the outside of the chamber.

In a third aspect, embodiments of the present disclosure provide an integrated range comprising the range hood of the second aspect and possible implementations thereof.

The technical scheme provided by the embodiment of the disclosure at least comprises the following beneficial effects:

the embodiment of the disclosure provides a fan, in which a fixed plate is located on an outer ring of a hub, a multi-wing impeller is located on the outer ring of the fixed plate, and the multi-wing impeller is connected with the hub through the fixed plate. In this way, at least part of the multi-wing impeller is sleeved on the outer ring of the hub in the axial direction of the fan, and the axial size of the fan is reduced relative to the structure that the impeller is directly and axially connected with the motor, so that the flattening of the fan is facilitated.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

FIG. 1 is a schematic diagram of a blower in accordance with an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of an impeller rotor assembly shown in an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a stator assembly shown in an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a blower shown in an embodiment of the disclosure;

fig. 5 is a schematic structural view of a stator winding according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a blower shown in an embodiment of the disclosure;

FIG. 7 is a schematic diagram of a blower in accordance with an embodiment of the present disclosure;

fig. 8 is a schematic structural view of a fan according to an embodiment of the present disclosure.

Description of the drawings

1. A rotor wheel assembly;

1a, an annular groove;

11. a hub; 12. a fixing plate; 13. a permanent magnet; 14. a multi-winged impeller;

12a, a first surface; 12b, a second surface; 12c, reinforcing ribs;

141. a first frame; 142. a second frame; 143. a blade;

2. a stator assembly;

21. a shaft body; 22. a stator assembly;

221. a stator backplate; 222. a stator core; 223. a stator winding;

221a, a third surface; 221b, fourth surface; 221c, annular projections;

223a, wires; 223b, an insulating coating;

3. a bearing;

4. a volute;

01. a motor; 011. a stator; 012. a rotor;

02. an impeller.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The disclosed embodiments provide a wind turbine that includes a rotor wheel assembly 1 and a stator assembly 2, as shown in fig. 1.

The rotor impeller assembly 1 comprises a hub 11, a fixed plate 12, a plurality of permanent magnets 13 and a multi-wing impeller, and the stator assembly 2 comprises a shaft body 21 and a stator assembly 22. By adopting the fan provided by the embodiment of the disclosure, the axial size of the fan can be reduced, and the fan is flattened.

The following describes each part of the fan:

1. rotor impeller assembly 1

The rotor blade wheel assembly 1 is a component of the fan that draws air by rotation.

As shown in fig. 1, the rotor wheel assembly 1 includes a hub 11, a fixed plate 12, a plurality of permanent magnets 13, and a multi-winged wheel 14.

Hub 11

The hub 11 is a component of the rotor wheel assembly 1 for rotational connection with the stator assembly 2.

As shown in fig. 1, the hub 11 has a cylindrical structure with one end open.

Alternatively, the outer wall of the non-open end of the hub 11 may have a chamfer, which may be circular in shape.

In this way, the mass of the hub 11 can be reduced and the assembly safety can be improved.

Fixing plate 12

The fixing plate 12 is a part of the rotor wheel assembly 1 for connecting the hub 11 and the multi-wing impeller 14, and fixedly connecting the permanent magnets 13.

As shown in fig. 1, the fixing plate 12 has a plate-like structure, and the fixing plate 12 is located at an outer ring of the hub 11 and is connected to the hub 11.

Alternatively, the first surface 12a of the fixing plate 12 may have a plurality of mounting grooves for accommodating the permanent magnets 13, the shape of the mounting grooves being identical to that of the permanent magnets 13.

Illustratively, the mounting grooves may be sector-shaped in shape, with the mounting grooves being circumferentially distributed about the hub 11.

The connection portion between the fixing plate 12 and the outer ring of the hub 11 may have a reinforcing rib 12c. Referring to fig. 1, both ends of the reinforcing bars 12c are respectively coupled to the second surface 12b of the fixing plate 12 and the outer ring of the hub 11.

In this way, the stability of the connection between the fixing plate 12 and the hub 11 can be improved.

The fixing plate 12 and the hub 11 may be integrally formed.

In this way, the processing difficulty of the fixing plate 12 and the hub 11 can be reduced, and meanwhile, the connection stability between the fixing plate 12 and the hub 11 can be improved.

The material of the fixing plate 12 and the hub 11 may be the same.

The plate thickness of the fixed plate 12 is greater than a reference thickness, the value of which is related to the type of the permanent magnet 13.

For example, when the permanent magnet 13 is made of neodymium-iron-boron magnet, the reference thickness is 4.0 mm, when the permanent magnet 13 is made of samarium-cobalt magnet, the reference thickness is 3.5 mm, when the permanent magnet 13 is made of alnico magnet, the reference thickness is 3.0 mm, and when the permanent magnet 13 is made of ferrite magnet, the reference thickness is 2.5 mm.

In one example, the materials of the fixing plate 12 and the hub 11 may be aluminum or gray cast iron.

In this way, the fixed plate 12 and the hub 11 can shield the magnetic field generated by the permanent magnet 13 and the stator assembly 2.

The fixing plate 12 and the hub 11 may be processed in steps.

Illustratively, the outer ring of the hub 11 may have a rectangular cylindrical structure, and the fixing plate 12 has rectangular through holes penetrating through both end plate surfaces, the shape of the rectangular through holes being the same as the cross-sectional shape of the outer ring of the hub 11.

In practice, the fixing plate 12 is sleeved on the outer ring of the hub 11, and the connection mode between the fixing plate 12 and the hub 11 can be welding.

Thus, when the fixing plate 12 is deformed, the fixing plate 12 can be disassembled, and the cost is saved.

The machining mode of the fixing plate 12 and the hub 11 may be numerical control (Computer Numerical Control, CNC) cutting, lathe milling, or casting in a corresponding mold, and the machining mode of the fixing plate 12 and the hub 11 is not limited in the embodiment of the disclosure.

Permanent magnet 13

The permanent magnet 13 is a component of the rotor wheel assembly 1 for cooperating with the stator assembly 22 to rotate the multi-winged impeller 14.

As shown in fig. 2, the permanent magnets 13 have a fan-shaped plate structure, and a plurality of permanent magnets 13 are circumferentially distributed on the fixed plate 12 and connected to the fixed plate 12.

The connection mode between the permanent magnet 13 and the fixed plate 12 may be adhesive, clamping, welding, or the like, and the connection mode between the permanent magnet 13 and the fixed plate 12 is not limited in the embodiment of the present disclosure.

Alternatively, the central angle and the length of the generatrix of each permanent magnet 13 are equal.

In this way, the difficulty of processing the permanent magnet 13 can be reduced.

Alternatively, a plurality of permanent magnets 13 may be circumferentially distributed around the axis of the hub 11, with the polarities of the ends of adjacent two permanent magnets 13 remote from the fixed plate 12 being opposite.

In this way, the symmetry of the rotor wheel assembly 1 may be improved.

Alternatively, a reference gap may be provided between adjacent two permanent magnets 13.

In this way, a space exists between two adjacent permanent magnets 13, so that attractive force or repulsive force between the two adjacent permanent magnets 13 is reduced, and the relative positions of the plurality of permanent magnets 13 are prevented from being changed.

As shown in fig. 2, the number of permanent magnets 13 may be 10, for example.

The permanent magnet 13 may be a neodymium-iron-boron magnet, a samarium-cobalt magnet, an alnico magnet or a ferrite magnet, and the material of the permanent magnet 13 is not limited in the embodiment of the present disclosure.

Multi-vane impeller 14

The multi-bladed impeller 14 is the component of the rotor-impeller assembly 1 for suction. As shown in fig. 1, the multi-vane impeller 14 is located on the outer ring of the stationary plate 12 and is connected to the stationary plate 12.

In this way, the multi-vane impeller 14 is not axially connected with the rotor, but is integrated with the rotor, and the multi-vane impeller 14 is equivalent to a ring sleeved on the outer ring of the rotor, so that the axial size of the fan can be reduced.

As shown in fig. 2, the multi-bladed impeller 14 includes a first rim 141, a second rim 142, and a plurality of blades 143.

The first frame 141 and the second frame 142 each have a circular plate structure, the first frame 141 and the second frame 142 are arranged in parallel, the blade 143 has a plate structure, and two ends of the blade 143 are respectively connected with two opposite wall surfaces of the first frame 141 and the second frame 142.

Alternatively, the plurality of louvers 143 may be all perpendicular to the first frame 141.

In this way, the structural strength of the multi-winged impeller 14 can be improved.

Alternatively, the plurality of blades 143 may be each of an arc-shaped plate-like structure, and the plurality of blades 143 may be bent toward the same direction.

Illustratively, the radius of curvature of the vane 143 is less than the outer diameter of the first rim 141.

In this way, the suction capacity of the multi-vane impeller 14 can be improved.

In practice, the direction of rotation of the multi-bladed impeller 14 may be the same as the direction of the lobes 143 or may be opposite to the direction of the lobes 143. When the rotation direction of the multi-vane impeller 14 is the same as the protruding direction of the vane plates 143, the multi-vane impeller 14 rotates, air between two adjacent vane plates 143 is extruded out of the multi-vane impeller 14 by the vane plates 143, the air pressure in the multi-vane impeller 14 is reduced, and the multi-vane impeller 14 can suck air inward through the opening of the second frame 142.

2. Stator assembly 2

The stator assembly 2 is the component of the wind turbine that is used to control the rotation of the rotor wheel assembly 1.

As shown in fig. 1, the stator assembly 2 includes a shaft 21 and a stator assembly 22.

Shaft body 21

The shaft body 21 is a component of the stator assembly 2 for rotational connection with the rotor wheel assembly 1.

As shown in fig. 1, the shaft body 21 is located in the inner ring of the hub 11 and is rotatably connected with the inner ring of the hub 11.

As shown in fig. 3, the shaft body 21 has a cylindrical structure.

Alternatively, the outer wall of the shaft body 21 may be subjected to nitriding treatment.

Thus, the surface hardness of the shaft body 21 can be improved, and the service life can be prolonged.

Stator assembly 22

The stator assembly 22 is a component of the stator assembly 2 for controlling the rotation of the rotor wheel assembly 1.

As shown in fig. 1, the stator assembly 22 corresponds to the positions of the plurality of permanent magnets 13 and is connected to the shaft body 21.

The stator assembly 22 includes a stator back plate 221, a plurality of stator cores 222, and a plurality of stator windings 223.

As shown in fig. 3, the stator back plate 221 has a circular plate-like structure, the axis of the stator back plate 221 coincides with the axis of the shaft body 21, and the third surface 221a of the stator back plate 221 is connected to the end of the shaft body 21 remote from the hub 11.

Alternatively, the stator back plate 221 may have a plate thickness greater than that of the fixed plate 12.

Thus, magnetic leakage can be prevented.

The stator back plate 221 and the shaft body 21 may be integrally formed.

In this way, the processing difficulty of the stator back plate 221 and the shaft body 21 can be reduced, and meanwhile, the connection stability between the stator back plate 221 and the shaft body 21 can be improved.

The stator back plate 221 and the shaft body 21 may be made of the same material.

The materials of the stator back plate 221 and the shaft body 21 may be alloy steel, carburized steel, or cast iron, and the materials of the stator back plate 221 and the shaft body 21 in the embodiment of the disclosure are not limited.

The stator back plate 221 and the shaft body 21 may be processed in steps.

The machining modes of the shaft body 21 and the shaft body 21 can be CNC cutting machining, lathe milling machining or casting machining in corresponding dies, and the machining modes of the shaft body 21 and the shaft body 21 are not limited in the embodiment of the disclosure.

In the case where the stator back plate 221 and the shaft body 21 are processed in steps, the connection manner between the stator back plate 221 and the shaft body 21 may be welding or bonding, and the connection manner between the shaft body 21 and the shaft body 21 is not limited in the embodiment of the present disclosure.

As shown in fig. 3, the plurality of stator cores 222 are located in the third surface 221a, are axially distributed around the shaft body 21, and are connected to the stator back plate 221.

Each stator core 222 may be comprised of a plurality of affixed arcuate silicon steel tabs.

In practice, the silicon steel sheet is wound around the shaft body 21, the number of windings may be determined according to the thickness of the silicon steel sheet, and when the thickness of the silicon steel sheet is large, the number of windings may be small, and when the thickness of the silicon steel sheet is large, the number of windings may be large. After the winding is completed, the wound silicon steel coil group may be connected to the third surface 221a of the stator back plate 221, and then cut into a plurality of independent silicon steel short sheet groups, and insulating particles may be sprayed on the surfaces of the silicon steel short sheet groups to form the stator core 222.

Illustratively, the material of the insulating particles may be ceramic.

Alternatively, as shown in fig. 3, the plurality of stator cores 222 may be each perpendicular to the third surface 221a of the stator back plate 221.

In this way, the connection stability between the stator core 222 and the stator back plate 221 can be improved.

The number of stator cores 222 is not equal to the number of permanent magnets 13.

Alternatively, the number of stator cores 222 may be greater than the number of permanent magnets 13. The number of permanent magnets 13 may be a first value M1, the number of stator cores 222 may be a second value M2, and the relationship between the first value M1 and the second value M2 is satisfied: m1 is less than M2 and less than 2M2.

In this way, for any permanent magnet 13, two stator cores 222 are located at two sides of the permanent magnet 13, so that the transmission efficiency of the stator assembly 2 to the rotor impeller assembly 1 can be improved.

For example, as shown in fig. 3, the number of stator cores 222 may be 12.

Alternatively, as shown in fig. 4, the distance from the geometric center of each stator core 222 to the axis of the shaft body 21 and the distance from the geometric center of each permanent magnet 13 to the axis of the hub 11 may be equal.

The geometric center of the stator core 222 may be a centroid of the stator core 222, and the geometric center of the permanent magnet 13 may be a centroid of the permanent magnet 13.

In this way, the position of the stator core 222 may correspond to the position of the permanent magnet 13, and accordingly, when the stator winding 223 is wound on the stator core 222, the position of the stator winding 222 may correspond to the position of the permanent magnet 13.

As shown in fig. 3, the stator assembly includes a plurality of stator windings 223, each stator winding 223 being wound on at least one stator core 222.

Alternatively, the magnetic flux direction of each stator winding 223 may be parallel to the axis of the shaft body 21, that is, the axis about which the stator windings 223 are wound on the stator core 222 is parallel to the axis of the shaft body 21.

As shown in fig. 3, according to the right-hand screw rule, the magnetic flux direction of the stator winding 223 is directed from the third surface 221a toward the shaft body 21 and is parallel to the axis of the shaft body 21, or the magnetic flux direction of the stator winding 223 is directed from the shaft body 21 toward the third surface 221a and is parallel to the axis of the shaft body 21.

In practice, the number of stator windings 223 is 3N, where N is a positive integer. The winding direction of the stator winding 223 in adjacent two stator cores may be the same or opposite for each stator winding 223.

Illustratively, the windings of adjacent two stator windings 223 may be oppositely wound.

The number of stator cores 222 wound by each stator winding 223 may be the same or different, and the number of stator cores 222 wound by each stator winding 223 is not limited in the embodiments of the present disclosure.

Alternatively, as shown in fig. 5, the stator winding 223 may include the conductive wire 223a and the insulating coating 223b, and the insulating coating 223b is uniformly distributed on the outer wall of the conductive wire 223 a.

The cross-sectional shape of the wire 223a may be circular, the cross-sectional shape of the insulating coating 223b may be circular, and the insulating coating 223b is looped around the outer wall of the wire 223 a.

Thus, when the insulating particles on the surface of the stator core 222 are detached, the insulating coating 223b can still prevent the current from being conducted between the stator winding 223 and the stator core 222, and short circuit occurs.

In practice, the stator winding 223 is wound around the core 222, and when the stator winding 223 is energized, the end of the stator winding 223 near the permanent magnet 13 may be S-pole or N-pole, as known from the magnetic effect of the current and ampere' S law. For a single permanent magnet 13, the permanent magnet 13 is located between two adjacent stator windings 223, and since the polarities of the ends of the two adjacent stator windings 223 close to the permanent magnet 13 are opposite, correspondingly, in the two adjacent stator windings 223, the polarity of one end of one stator winding 223 close to the permanent magnet 13 is the same as the polarity of the permanent magnet 13, and the polarity of the other stator winding 223 close to the permanent magnet 13 is opposite to the polarity of the permanent magnet 13, the two stator windings 223 respectively have repulsive force and attractive force to the permanent magnet 13 according to the principle of homopolar repulsion and heteropolar attraction, so that the impeller rotor assembly 1 rotates. After the permanent magnet 13 rotates to the other stator winding 223, the current direction changes, and the end of the other stator winding 223, which is close to the permanent magnet 13, is opposite to the polarity of the permanent magnet 13, so that the acting force on the permanent magnet is changed from attractive force to repulsive force, and the impeller rotor assembly 1 is further pushed to rotate.

The following describes some optional structural features of the blower:

structural feature one, the stator assembly 22 may extend into the rotor wheel assembly 1.

As shown in fig. 1, in the rotor wheel assembly 1, the fixing plate 12 and the outer ring of the hub 11 may enclose an annular groove 1a. The permanent magnets 13 are all located in the mold changing groove 1a, are circumferentially distributed around the hub 11, and are connected with the groove body of the annular groove 1a.

The stator assembly 2 includes a shaft body 21 and a stator assembly 22, the shaft body 21 is rotatably connected with the inner ring of the hub 11, and the stator assembly 22 is located in the annular groove 1a, corresponds to the positions of the plurality of permanent magnets 13, and is connected with the shaft body 21.

Thus, the axial dimension of the motor can be reduced, so that the axial dimension of the motor is further reduced, and the motor is beneficial to flattening.

Alternatively, as shown in fig. 4, in the case where the shaft body 21 is attached to the bottom surface of the hub 11, the fourth surface 221b of the stator back plate 221 is flush with the unopened wall surface of the multi-vane impeller 14, and the fourth surface 221b is the surface opposite to the third surface 221a.

In this way, the axial dimension of the blower can be reduced.

And the structural characteristics II, the rotor impeller assembly 1 and the stator assembly 2 can be rotationally connected through a bearing 3.

As shown in fig. 4, the shaft body 21 is rotatably connected to the inner ring of the hub 11 via the bearing 3.

In practice, the outer race of the bearing 3 may be an interference fit with the inner race of the hub 11, and the inner race of the bearing 3 may be an interference fit with the outer race of the shaft 21.

In this way, the connection stability can be improved.

Alternatively, the bearing 3 may be a deep groove ball bearing.

In this way, the bearing 3 has a good capacity to withstand axial and radial loads, thereby increasing the service life of the bearing 3.

Alternatively, as shown in fig. 4, the third surface 221a of the stator back plate 221 may have an annular protrusion 221c.

The bottom surface and the inner ring of the annular protrusion 221c are connected to the third surface 221a and the outer ring of the shaft body 21, respectively. The outer diameter of the annular protrusion 221c is smaller than the nominal diameter of the bearing 3, and the top surface of the annular protrusion 221c is connected with the outer ring of the bearing 3.

In this way, the top surface of the annular protrusion 221c may be connected only to the outer ring of the bearing 3, improving the transmission efficiency.

The fan can also comprise a volute 4.

As shown in fig. 6, the side wall of the scroll 4 has a circular through hole through which the fan is disposed in the scroll 4, the scroll 4 is looped outside the multi-vane impeller 14, and the inner wall of the scroll 4 is connected with the stator back plate 221.

Alternatively, the connection between the inner wall of the volute 4 and the stator backplate 221 may be by welding.

In this way, the stability of the connection between the volute 4 and the stator assembly 22 can be improved.

Fourth, the length of the shaft 21 can be smaller than the thickness of the Yu Duoyi impeller 14.

As shown in fig. 2, the multi-bladed impeller 14 includes a first rim 141, a second rim 142, and a plurality of blades 143.

The first frame 141 and the second frame 142 each have a circular plate structure, the first frame 141 and the second frame 142 are arranged in parallel, the blade 143 has a plate structure, and two ends of the blade 143 are respectively connected with two opposite wall surfaces of the first frame 141 and the second frame 142.

Alternatively, the plurality of louvers 143 may be all perpendicular to the first frame 141.

In one example, the thickness of the first frame 141 may be D1, the thickness of the second frame 142 may be D2, the distance between the two ends of the vane 143 may be D3, the overall thickness of the multi-vane impeller 14 may be a first value D1, and d1=d1+d2+d3.

As shown in fig. 4, the axial length of the shaft body 21 may be D2, and D2 and D1 satisfy d2= 0.9D1.

Thus, the axial length of the shaft body 21 is short, which is advantageous in that the blower tends to be flattened.

Alternatively, the wall thickness of the hub 11 may be a third value D3, D3 and D1 satisfying d3= 0.1D1.

In this way, the sum of the axial length of the stub shaft 21 and the wall thickness of the hub 11 may be equal to the thickness of the multi-winged impeller 14, facilitating flattening of the fan.

The above optional structural features may be used alone or in combination.

The technical scheme provided by the embodiment of the disclosure at least comprises the following beneficial effects:

the disclosed embodiment provides a fan in which a fixing plate 12 is located at an outer ring of a hub 11, a multi-vane impeller 14 is located at an outer ring of the fixing plate 12, and the multi-vane impeller 14 is connected with the hub 11 through the fixing plate 12. In this way, in the axial direction of the fan, at least part of the multi-vane impeller 14 is sleeved on the outer ring of the hub 11, and the axial dimension of the part of the multi-vane impeller 14 sleeved on the outer ring of the hub 11 is the axial dimension reduced by the whole fan, so that the axial dimension of the fan is reduced, and the flattening of the fan is facilitated.

The principle of reducing the axial dimension of the blower as a whole according to the embodiments of the present disclosure will be briefly described below with reference to the accompanying drawings:

as shown in fig. 7, the blower includes a motor 01 and an impeller 02. The motor 01 includes a stator 011 and a rotor 012, and the impeller 02 is axially connected to the rotor 012.

In the above configuration, the axial length of the motor 01 is L, the length of the impeller 02 is N, and the axial length of the fan is l+n (the gap length between the stator 011 and the rotor 012, and the gap length between the rotor 012 and the impeller 02 are omitted, and the following is true).

As shown in fig. 8, the blower includes a motor 01 and an impeller 02. The motor 01 comprises a stator 011 and a rotor 012, and the impeller 02 is partially sleeved on the outer wall of the rotor 012.

In the above structure, the axial length of the motor 01 is L, the length of the impeller 02 is N, the axial dimension of the portion of the impeller 02 which is sleeved on the outer ring of the rotor 012 is M, and the axial length of the fan is l+n-M. As is apparent from the above illustration, when the impeller 02 is completely looped around the outer wall of the rotor 012, the axial length of the fan is L.

Therefore, the fan provided by the embodiment of the disclosure can effectively reduce the overall axial size of the fan.

The embodiment of the disclosure provides a smoke ventilator, which comprises the fan, a console and an oil pipe. The control console is used for controlling the fan access circuit and the output power of the fan. One end of the oil pipe is communicated with an air outlet of the volute 4, and the other end of the oil pipe is communicated with the outside.

The embodiment of the disclosure provides an integrated kitchen, and the integrated kitchen includes above-mentioned smoke ventilator, gas-cooker, sterilizer, storage cabinet, oven and dish washer.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims (13)

1. A fan, characterized in that it comprises a rotor-impeller assembly (1) and a stator assembly (2);

the rotor impeller assembly (1) comprises a hub (11), a fixed plate (12), a plurality of permanent magnets (13) and a multi-wing impeller (14), wherein the fixed plate (12) is positioned on the outer ring of the hub (11) and is connected with the hub (11), the plurality of permanent magnets (13) are circumferentially distributed on the fixed plate (12) and are connected with the fixed plate (12), and the multi-wing impeller (14) is positioned on the outer ring of the fixed plate (12) and is connected with the fixed plate (12);

the stator assembly (2) comprises a shaft body (21) and a stator assembly (22), the shaft body (21) is rotationally connected with the inner ring of the hub (11), and the stator assembly (22) corresponds to the positions of the plurality of permanent magnets (13) and is connected with the shaft body (21).

2. The fan according to claim 1, wherein the fixing plate (12) and the outer ring of the hub (11) enclose an annular groove (1 a), and the plurality of permanent magnets (13) are located in the annular groove (1 a), circumferentially distributed around the hub (11), and connected with the bottom of the annular groove (1 a);

the stator assembly (22) is located in the annular recess (1 a).

3. A fan according to claim 2, characterized in that the polarities of the ends of adjacent permanent magnets (13) remote from the bottom of the slot are opposite.

4. The wind turbine of claim 1, wherein the stator assembly (22) includes a stator back plate (221), a plurality of stator cores (222), and a plurality of stator windings (223);

a third surface (221 a) of the stator back plate (221) is connected with the shaft body (21);

the stator cores (222) are located on the third surface (221 a), circumferentially distributed around the shaft body (21), and connected with the stator back plate (221);

each stator winding (223) is wound on at least one of the stator cores (222).

5. A fan according to claim 4, characterized in that the shaft body (21) is coaxial with the hub (11);

the distance from the geometric center of each permanent magnet (13) to the axis of the hub (11) is equal to the distance from the geometric center of each stator core (222) to the axis of the shaft body (21).

6. The fan according to claim 4, characterized in that the magnetic flux direction of the stator winding (223) is parallel to the axis of the shaft body (21).

7. The wind turbine of claim 4, wherein the stator winding (223) comprises wires (223 a) and an insulating coating (223 b), the insulating coating (223 b) being evenly distributed on an outer wall of the wires (223 a).

8. Fan according to claim 1, characterized in that the shaft body (21) is rotatably connected with the inner ring of the hub (11) by means of a bearing (3).

9. Fan according to claim 1, characterized in that the bearing (3) is a deep groove ball bearing.

10. The fan according to any of claims 1 to 9, further comprising a volute (4), the volute (4) being looped over the multi-winged impeller (14) and connected to the stator assembly (22).

11. The fan according to any one of claims 1 to 9, characterized in that the distance from the end of the multi-bladed impeller (14) remote from the fixed plate (12) to the fixed plate (12) is a first value, the axial length of the shaft body (21) is a second value, and the first value is greater than the second value.

12. A range hood comprising a fan as claimed in any one of claims 1 to 11.

13. An integrated range comprising the range hood of claim 12.