Motor, fan device and cleaning equipment

Abstract

The utility model provides a motor and a corresponding fan device and cleaning equipment thereof.The motor comprises a control panel assembly, a heat conduction support, a stator assembly, a rotor assembly, a movable impeller, a first containing cavity, a second containing cavity and a third containing cavity, the first containing cavity, the second containing cavity and the third containing cavity are sequentially distributed from top to bottom, a stator winding is wound around an insulation framework, and the control panel assembly comprises a circuit board and a plurality of power devices; the circuit board is contained in the first containing cavity, the stator core and the stator winding are contained in the second containing cavity, the movable impeller is contained in the third containing cavity, the rotor assembly comprises a rotating shaft capable of driving the movable impeller to rotate, the power devices are arranged on the lower side, facing the heat conduction support, of the circuit board, and the power devices are connected with the heat conduction support in a heat conduction mode. The vertical projection of the stator assembly and the vertical projection of the heat conduction support at least partially coincide. According to the design, the space of the motor is more reasonably divided to correspondingly accommodate corresponding components, and on the basis, the heat dissipation of the plurality of power devices is improved based on the heat conduction bracket.

Description

Technical Field

[0001] The utility model relates to a motor and a corresponding fan device and cleaning equipment, in particular to a motor with a circuit board and a plurality of power devices. Background Art

[0002] Cleaning equipment (such as vacuum cleaners or floor scrubbers) provides a lot of convenience for users' cleaning work. The popularity of cleaning equipment is increasing, and users have higher requirements for cleaning equipment. Cleaning equipment is usually driven by a motor to work. In addition to facing various relatively dry dust, impurities and other garbage, cleaning equipment will also face stains, sewage, etc. In order to prevent the motor from rusting, short circuiting, aging and other failures due to moisture or liquid, the existing motor design focuses on its sealing, waterproof and other factors. The existing motor has complex structure, large size, high cost, and difficult heat dissipation. The existing motor places the control board assembly inside the motor. The power devices on the control board assembly generate more heat and it is difficult to dissipate the heat. Therefore, the existing motor needs targeted improvement. Utility Model Content

[0003] One of the technical problems solved by the present application is to improve the heat dissipation of power devices on a circuit board of a motor.

[0004] A motor comprises a first accommodating chamber, a second accommodating chamber, a third accommodating chamber, a control board assembly, a heat-conducting bracket, a stator assembly, a rotor assembly, and a moving impeller. The first accommodating chamber, the second accommodating chamber, and the third accommodating chamber are sequentially distributed from top to bottom. The first accommodating chamber is located on the upper side of the heat-conducting bracket. The stator assembly comprises a stator core, a stator winding, and an insulating frame. The stator winding is wound around the insulating frame. The control board assembly comprises a circuit board and a plurality of power devices. The circuit board is located on the upper side of the heat-conducting bracket, and the stator core is located on the lower side of the heat-conducting bracket. The circuit board is accommodated in the first accommodating chamber, the stator core and the stator winding are accommodated in the second accommodating chamber, and the moving impeller is accommodated in the third accommodating chamber. The rotor assembly comprises a rotating shaft capable of driving the moving impeller to rotate. The plurality of power devices are arranged on the lower side of the circuit board facing the heat-conducting bracket, and the plurality of power devices are heat-conductingly connected to the heat-conducting bracket. The vertical projection of the stator assembly at least partially overlaps with the vertical projection of the heat-conducting bracket.

[0005] Such a design promotes a more reasonable division of the space of the motor to accommodate corresponding components, and on this basis, based on the heat-conducting bracket, promotes more effective conduction and dissipation of the heat generated by the several power devices.

[0006] Optionally, the motor further includes an insulating heat-conducting material filling a gap between the heat-conducting bracket and the power device, the plurality of power devices are attached to the bottom surface of the circuit board facing the heat-conducting bracket, the heat-conducting bracket includes a plurality of first grooves corresponding to the plurality of power devices, the plurality of first grooves are recessed in the upper surface of the heat-conducting bracket, the power devices respectively at least partially enter the corresponding first grooves downward, and the insulating heat-conducting material fills the gap between the first grooves and the corresponding power devices; the power device is a MOS tube, the MOS tube is welded to the bottom surface of the circuit board, the MOS tube is a patch-like component attached to the bottom surface of the circuit board, the insulating heat-conducting material completely covers the bottom surface of the MOS tube, and the vertical projection of each MOS tube is completely covered by the vertical projection of the heat-conducting bracket.

[0007] Optionally, the motor also includes a casing, an upper cover, and a first air outlet, and the vertical projection of the upper cover is completely within the range defined by the outer contour of the vertical projection of the heat-conducting bracket; the vertical projection of the stator assembly is completely within the range defined by the outer contour of the vertical projection of the heat-conducting bracket, and the stator assembly also includes a plurality of piercing terminals, and the plurality of piercing terminals are fixed on the insulating frame. The casing surrounds at least a part of the second accommodating cavity, and the first air outlet is located on the periphery of the casing, in a state of surrounding the central axis of the motor; the impeller rotates to drive the air flow to form an exhaust airflow, and the exhaust airflow is discharged from the motor through the first air outlet. The heat-conducting bracket covers the upper end of the casing, the heat-conducting bracket and the casing define a second accommodating cavity, and the heat-conducting bracket and the upper cover define a first accommodating cavity; the upper cover is locked to the casing or the heat-conducting bracket, and the heat-conducting bracket is locked to the casing. The upper cover or the heat-conducting bracket includes a plurality of first positioning protrusions, and the circuit board includes a plurality of first positioning notches corresponding to the plurality of first positioning protrusions, and the plurality of first positioning notches are located on the periphery of the circuit board.

[0008] Optionally, the motor further comprises a plurality of first screws and a plurality of second screws, the first locking protrusion being a part of the thermally conductive bracket, the first locking protrusion being formed with a plurality of first locking screw holes, the plurality of first screws being correspondingly locked in the plurality of first locking screw holes to lock the upper cover to the thermally conductive bracket; the casing being formed with a plurality of second locking screw holes, the plurality of second locking screw holes being evenly distributed in the circumferential direction around the central axis of the motor, the plurality of second screws being correspondingly locked in the plurality of second locking screw holes to lock the thermally conductive bracket to the casing; the thermally conductive bracket being disc-shaped, the thermally conductive bracket being perpendicular to the rotating shaft; the thermally conductive bracket being divided into a first accommodating cavity and a second accommodating cavity upwardly, each piercing terminal being upwardly passed through the thermally conductive bracket and extending into the first accommodating cavity and being welded to the circuit board, and each piercing terminal being not in contact with the thermally conductive bracket.

[0009] Optionally, the motor also includes a positioning bracket and a casing, the positioning bracket is accommodated in the first accommodating cavity, the rotor assembly also includes a magnetic ring, an upper bearing, and a lower bearing, the upper bearing and the lower bearing are assembled on the rotating shaft, the rotating shaft passes through the upper bearing and the lower bearing, the positioning bracket includes a first bearing accommodating portion, a first support arm, a second support arm, and a third support arm, the first support arm, the second support arm, and the third support arm are distributed in sequence in the circumferential direction around the central axis of the motor, and the first support arm, the second support arm, and the third support arm are directly supported on the stator core respectively; the casing also includes a second bearing accommodating portion, the upper bearing is installed in the first bearing accommodating portion, and the lower bearing is installed in the second bearing accommodating portion; the positioning bracket is made of metal, and the stator core and the rotor assembly are thermally connected to the thermally conductive bracket through the positioning bracket.

[0010] Optionally, the motor also includes a casing and a first air outlet. The casing surrounds at least a part of the second accommodating cavity. The first air outlet is located on the periphery of the casing and is in a state of surrounding the central axis of the motor. The exhaust airflow formed by the air flow driven by the rotation of the impeller is discharged from the motor through the first air outlet. The thermal conductive bracket includes a blowing and heat dissipation part, which is exposed to the outside of the motor. The vertical projection of the blowing and heat dissipation part surrounds the central axis of the motor. The blowing and heat dissipation part is located above the first air outlet. The exhaust air flows upward out of the first air outlet and can blow and dissipate the air on the blowing and heat dissipation part.

[0011] Optionally, the air blowing heat dissipation part includes a plurality of heat dissipation fins, which are located outside the motor and on the bottom side of the air blowing heat dissipation part, and the plurality of heat dissipation fins are arranged in a state of surrounding the central axis of the motor, and the plurality of heat dissipation fins are distributed in sequence in the circumferential direction surrounding the central axis of the motor, and the plurality of heat dissipation fins are distributed radially on the periphery of the motor, and each heat dissipation fin has a radial gap with the casing, and each radial gap is distributed in sequence in the circumferential direction surrounding the central axis of the motor, and a part of the exhaust air flow flows through the radial gap.

[0012] Optionally, the casing includes an annular upper end portion and an upper port surrounded by the annular upper end portion, the heat-conducting bracket covers the upper port, and a sealing ring is sandwiched between the heat-conducting bracket and the annular upper end portion to achieve a sealed connection between the heat-conducting bracket and the casing; the annular upper end portion includes a second annular groove corresponding to the sealing ring, the sealing ring is placed in the second annular groove, the sealing ring and the second annular groove respectively surround the central axis of the motor, and the plurality of heat dissipation fins are located radially outward of the annular upper end portion; the annular upper end portion includes a first annular flange, the first annular flange surrounds the central axis of the motor, the first annular flange is in a radially outward protruding state on the outer periphery of the casing, the plurality of heat dissipation fins are distributed on the periphery of the first annular flange, the heat dissipation fins extend downward beyond the first annular flange, and there is a radial gap between each heat dissipation fin and the first annular flange, and the radial gap extends upward from the corresponding radial interval.

[0013] Optionally, the air blowing and heat dissipation part is located at the periphery of the upper end of the casing, and the air blowing and heat dissipation part is exposed to the periphery of the upper end of the casing in a circular ring shape, the vertical projection of the air blowing and heat dissipation part surrounds the vertical projection of the casing, the vertical projection of the air blowing and heat dissipation part partially overlaps with the vertical projection of the first air outlet, and the overlapping part of the vertical projection of the air blowing and heat dissipation part and the vertical projection of the first air outlet surrounds the central axis of the motor, and the exhaust air flow blows upward to the air blowing and heat dissipation part through the first air outlet, thereby blowing and cooling the air blowing and heat dissipation part; the motor also includes an upper cover and a first flexible sleeve, and the heat conductive bracket and the upper cover define a first accommodating cavity; the first flexible sleeve is arranged on the upper cover; the heat conductive bracket also includes a first annular protrusion and a first annular groove, the first annular protrusion and the first annular groove are arranged on the side of the air blowing and heat dissipation part facing away from the first air outlet, the first annular protrusion protrudes upward, the first annular protrusion surrounds the periphery of the first annular groove, and the first annular groove is recessed downward; the first flexible sleeve includes an annular sealing part, the annular sealing part The annular sealing flange comprises an annular lower end edge, the annular sealing flange protrudes radially outward on the outer periphery of the first flexible sleeve, the annular lower end edge protrudes downward relative to the annular sealing flange, the first annular protrusion, the first annular groove, the annular sealing flange, and the annular lower end edge respectively surround the central axis of the motor, the annular sealing flange is downwardly attached to the first annular protrusion, and the annular lower end edge is downwardly embedded in the first annular groove; the annular sealing flange extends radially outward beyond the first annular protrusion, and the vertical projection of the heat-conducting bracket is completely located within the range defined by the outer peripheral contour of the vertical projection of the annular sealing flange; the heat-conducting bracket also comprises a second annular protrusion, the second annular protrusion is located on the upper side of the heat-conducting bracket, the first annular protrusion and the second annular protrusion respectively protrude upward from the air-blowing heat dissipation part, the second annular protrusion surrounds the central axis of the motor, the interval between the first annular protrusion and the second annular protrusion constitutes a first annular groove, the upper cover is locked to the heat-conducting bracket, and the lower end of the upper cover is downwardly abutted against the second annular protrusion.

[0014] Optionally, the motor also includes an upper cover, a casing, and a positioning bracket. The upper cover is made of plastic material, the heat-conducting bracket and the upper cover define a first accommodating cavity, the casing is made of plastic material, and the heat-conducting bracket and the casing define a second accommodating cavity; the heat-conducting bracket is made of metal material, the casing includes an annular upper end portion and an upper port surrounded by the annular upper end portion, the heat-conducting bracket is made of metal material, and the heat-conducting bracket covers the upper port; the stator assembly also includes a plurality of piercing terminals; the insulating skeleton is installed on the stator core, the insulating skeleton is insulated and isolated between the stator core and the stator winding, the rotor assembly passes through the central area of ​​the stator core and the insulating skeleton from top to bottom, the insulating skeleton includes an upper skeleton and a lower skeleton, the stator winding includes a first winding, a second winding, and a third winding, the first winding, the second winding, and the third winding The three windings are respectively formed by winding a single enameled wire, and the upper skeleton and the lower skeleton jointly form a first winding part, a second winding part, and a third winding part, which are evenly distributed in the circumferential direction around the central axis of the motor, and the first winding is wound on the first winding part, the second winding is wound on the second winding part, and the third winding is wound on the third winding part; the plurality of piercing terminals include a first piercing terminal, a second piercing terminal, and a third piercing terminal, and the vertical projections of the stator core and the upper skeleton are completely located within the range defined by the outer peripheral contour of the vertical projection of the heat-conducting bracket, and the upper skeleton includes a first part, a second part, and a third part, and the first part, the second part, and the third part are respectively upward toward the heat-conducting bracket, and the first part, the second part, and the third part are circumferentially distributed around the central axis of the motor. The first part is formed with a first slot for inserting the first piercing terminal, the second part is formed with a second slot for inserting the second piercing terminal, and the third part is formed with a third slot for inserting the third piercing terminal; the first slot, the second part are formed with a first slot for inserting the second piercing terminal, and the third part is formed with a third slot for inserting the third piercing terminal; the first slot, the second part are formed with a second slot for inserting the second piercing terminal, and the third part is formed with a third slot for inserting the third piercing terminal; the first slot, the second part are formed with a first slot, the second part are formed with a second slot, and the third part is formed with a third slot; the first slot, the second The slot and the third slot are respectively in a state of opening upward toward the heat-conducting bracket; the first winding includes a first left lead wire and a first right lead wire, the second winding includes a second left lead wire and a second right lead wire, and the third winding includes a third left lead wire and a third right lead wire. The first left lead wire and the first right lead wire constitute the opposite end lead wires of the first winding, the second left lead wire and the second right lead wire constitute the opposite end lead wires of the second winding, the third left lead wire and the third right lead wire constitute the opposite end lead wires of the third winding, the first right lead wire and the second left lead wire are respectively directly connected to the first piercing terminal; the second right lead wire and the third left lead wire are respectively directly connected to the second piercing terminal; the third right lead wire and the first left lead wire are respectively directly connected to the third piercing terminal;The upper frame also includes a circular ring portion, which surrounds the central axis of the motor, and the circular ring portion sequentially connects the first winding portion, the first portion, the second winding portion, the second portion, the third winding portion, and the third portion along the circumferential direction surrounding the central axis of the motor. ;

[0015] The present application also provides a fan device, including the aforementioned motor, fan housing, and exhaust chamber, wherein the motor is located in the fan housing, the exhaust chamber is formed between the fan housing and the motor, and the exhaust air flow is discharged from the motor into the exhaust chamber.

[0016] Optionally, the fan cover includes a first cover shell, a second cover shell, and a third flexible sealing gasket sandwiched between the first cover shell and the second cover shell, the third flexible sealing gasket surrounds the periphery of the motor, the first cover shell is located above the second cover shell, and the third flexible sealing gasket is sandwiched between the lower end of the first cover shell and the upper end of the second cover shell; the motor also includes a wind cover and a second flexible sleeve, the wind cover surrounds at least a part of the third accommodating chamber, the wind cover includes a first air inlet, the second flexible sleeve includes a second air inlet, the wind cover covers the impeller, the second flexible sleeve is covered on the wind cover, the first air inlet constitutes the air inlet of the third accommodating chamber, the first air inlet is located between the second air inlet and the third accommodating chamber; the fan cover also includes a third air inlet, and the second air inlet is located between the third air inlet and the first air inlet; the first air inlet, the second air inlet, and the third air inlet are stacked together in sequence; the impeller can rotate under the drive of the rotating shaft to generate a sewage suction airflow, and the sewage suction airflow continues to flow downstream after flowing to the impeller. The exhaust airflow is formed, and the sewage suction airflow is used to suck up the stolen goods, and the sewage suction airflow flows through the third air inlet, the second air inlet, and the first air inlet in sequence; the fan housing also includes a bell-shaped portion, the bell-shaped portion is located below the motor, the flared end of the bell-shaped portion is relatively far away from the motor, and the narrow end of the bell-shaped portion is relatively close to the motor, the narrow end, the third air inlet, the second air inlet, and the first air inlet are superimposed on each other from bottom to top, and the sewage suction airflow flows through the flared end, the narrow end, the third air inlet, the second air inlet, and the first air inlet in sequence; the fan housing also includes a second air outlet and at least one air outlet channel, and the exhaust airflow is discharged from the fan device via the second air outlet; the at least one air outlet channel fluid is connected to the exhaust chamber, and the exhaust airflow flows through the exhaust chamber, the at least one air outlet channel, and the second air outlet in sequence after being discharged from the motor, so as to be discharged from the fan device; the at least one air outlet channel includes the first air outlet channel and the second air outlet channel, and the first air outlet channel and the second air outlet channel are located on the left and right sides of the bell-shaped portion.

[0017] Optionally, the first air outlet channel and the second air outlet channel extend downward respectively; the fan cover also includes a bottom cover, the bell-mouth portion is a part of the bottom cover, the third air inlet is opened in the second cover, the second cover also includes a first support portion and a second support portion, the first support portion and the second support portion are located on the left and right sides of the bell-mouth portion, the first support portion and the second support portion extend downward respectively, the first support portion is hollow to form a first air outlet channel therein, and the second support portion is hollow to form a second air outlet channel therein; the second air outlet is opened in the bottom cover, the second air outlet and the flared end are located at the bottom of the fan device; the second cover also includes a first inclined wall and a second inclined wall, the first inclined wall and the second inclined wall are located at the bottom of the exhaust chamber, the first inclined wall extends obliquely downward toward the first air outlet channel to guide the airflow to the first air outlet channel; the second inclined wall extends obliquely downward toward the second air outlet channel to guide the airflow to the second air outlet channel.

[0018] Optionally, the fan device also includes a bell-mouth portion and a second air outlet, the bell-mouth portion is located below the motor; the motor also includes a hood, the hood covers the impeller, the hood surrounds at least a portion of the third accommodating chamber, the hood includes a first air inlet, the impeller can be driven by the rotating shaft to rotate to generate a sewage suction airflow, the sewage suction airflow flows to the impeller and continues to flow downstream to form an exhaust airflow, the sewage suction airflow is used to absorb stolen goods, the bell-mouth portion is located upstream of the third accommodating chamber, the expanded end of the bell-mouth portion is relatively far away from the third accommodating chamber, the narrow end of the bell-mouth portion is relatively close to the third accommodating chamber, and the sewage suction airflow flows through the first air in sequence. A flared end, a narrow end, and a first air inlet, and the exhaust air flows out of the fan device via the second air outlet; the second air outlet and the flared end are located at the bottom of the fan device; the fan device also includes at least one air outlet channel, and the at least one air outlet channel fluid is connected to the exhaust chamber, and the at least one air outlet channel includes a first air outlet channel and a second air outlet channel, and the first air outlet channel and the second air outlet channel are located on the left and right sides of the bell-mouth part, a part of the exhaust air flow flows through the exhaust chamber, the first air outlet channel, and the second air outlet in sequence, and another part of the exhaust air flow flows through the exhaust chamber, the second air outlet channel, and the second air outlet in sequence.

[0019] Optionally, the motor also includes an annular wall, a wind hood, and a second flexible sleeve. The wind hood covers the impeller, and the second flexible sleeve is covered on the wind hood. A portion of the second flexible sleeve surrounds and abuts against the annular wall. The second flexible sleeve also includes a second annular flange, an annular protrusion, a plurality of ribs, and a second air inlet. The second annular flange surrounds the central axis of the motor, and the second annular flange is arranged on the outer periphery of the portion of the second flexible sleeve. The annular protrusion surrounds the central axis of the motor. The annular protrusion is located on the bottom side of the second flexible sleeve and protrudes downward. The annular protrusion surrounds the second air inlet, and the plurality of ribs extend from the second annular flange to the annular protrusion respectively. The fan cover also includes a first cover and a second cover. The second cover includes a second rib. The second rib is in a ring shape surrounding the central axis of the motor, and the second rib protrudes upward and abuts against the annular protrusion upward.

[0020] The present application also provides a cleaning device, comprising the aforementioned motor or the aforementioned fan device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a cleaning device according to an embodiment of the present application;

[0022] Figure 2 A three-dimensional diagram of a fan device according to an embodiment of the present application;

[0023] Figure 3 Another three-dimensional view of a fan device according to an embodiment of the present application;

[0024] Figure 4 A vertical cross-sectional view of a fan device according to an embodiment of the present application (the cross-sectional view is the plane where the central axis of the motor is located);

[0025] Figure 5 Another vertical cross-sectional view of the fan device according to an embodiment of the present application (the cross-sectional view is the plane where the central axis of the motor is located);

[0026] Figure 6 for Figure 5 A partial enlarged view of

[0027] Figure 7 A cross-sectional view from above of a fan device according to an embodiment of the present application (the cross section is perpendicular to the central axis of the motor (stator winding is not shown));

[0028] Figure 8 A cross-sectional view from below of a fan device according to an embodiment of the present application (the cross-section is perpendicular to the central axis of the motor);

[0029] Fig. 9 A three-dimensional diagram of an upper frame of a motor of a fan device according to an embodiment of the present application;

[0030] Fig.10An exploded view of a fan device according to an embodiment of the present application;

[0031] Fig.11 Another exploded view of a fan device according to an embodiment of the present application;

[0032] Fig.12 A three-dimensional diagram of a motor of a fan device according to an embodiment of the present application;

[0033] Fig.13 Another three-dimensional view of the motor of the fan device according to one embodiment of the present application;

[0034] Fig.14 It is a three-dimensional schematic diagram of a motor of a fan device according to an embodiment of the present application, with the first flexible sleeve, the upper cover, and the anti-rotation block hidden;

[0035] Fig.15 The motor of the fan device according to one embodiment of the present application is Fig.14 A three-dimensional schematic diagram of a circuit board, a housing, and a second flexible sleeve is further hidden on the basis of the present invention;

[0036] Fig.16 An exploded view of a motor of a fan device according to an embodiment of the present application;

[0037] Fig.17 Another exploded view of the motor of the fan device according to one embodiment of the present application;

[0038] Fig.18 A three-dimensional diagram of a stator assembly of a motor of a fan device according to an embodiment of the present application;

[0039] Fig.19 Another perspective view of the stator assembly of the motor of the fan device according to one embodiment of the present application;

[0040] Fig. 20 An exploded view of a stator assembly of a motor of a fan device according to an embodiment of the present application (stator windings are not shown);

[0041] Fig.21 Another exploded view of the stator assembly of the motor of the fan device according to an embodiment of the present application (the stator winding is not shown). DETAILED DESCRIPTION

[0042] Figures 2 to 21A fan device 6 and its motor 1 are disclosed. The motor 1 includes a first accommodating chamber 100, a second accommodating chamber 101, a third accommodating chamber 102, a control board assembly 2, a heat-conducting bracket 3, a stator assembly 4, a rotor assembly 5, and a moving impeller 110. The first accommodating chamber 100 is located on the upper side of the heat-conducting bracket 3, and the second accommodating chamber 101 is located on the lower side of the heat-conducting bracket 3. The first accommodating chamber 100, the second accommodating chamber 101, and the third accommodating chamber 102 are distributed in sequence from top to bottom. The stator assembly 4 is accommodated in the second accommodating chamber 101, and the moving impeller 110 is accommodated in the third accommodating chamber 102. The rotor assembly 5 includes a rotating shaft 50 that can drive the moving impeller 110 to rotate. One end of the rotating shaft 50 extends downward from the second accommodating chamber 101 and extends into The third accommodating cavity 102 is connected to the impeller 110; the control board assembly 2 is used to control the motor 1, and the control board assembly 2 includes a circuit board 20, a plurality of power devices 21, a large capacitor 22, and a control chip 23. The circuit board 20 is accommodated in the first accommodating cavity 100, and the plurality of power devices 21 are arranged on the lower side of the circuit board 20 facing the heat-conducting bracket 3, and the plurality of power devices 21 are attached to the bottom surface of the circuit board 20 facing the heat-conducting bracket 3, and the plurality of power devices 21 are thermally connected to the heat-conducting bracket 3. The vertical projection of the stator assembly 4 at least partially overlaps with the vertical projection of the heat-conducting bracket 3, and the area of ​​the vertical projection of the plurality of power devices 21 does not exceed two-fifths of the area of ​​the vertical projection of the heat-conducting bracket 3. Such a design makes it possible to reasonably divide the space of the motor 1 to accommodate the corresponding components, and the heat-conducting bracket 3 promotes more effective conduction and dispersion of the heat generated by the plurality of power devices 21, and the relatively large area of ​​the heat-conducting bracket 3 compared to the plurality of power devices 21 promotes rapid diffusion of heat.

[0043] The control board assembly 2 is accommodated in the first accommodating cavity 100, and the electronic components of the control board assembly 2 (including the large capacitor 22, the control chip 23, the power device 21, etc.) are distributed on the circuit board 20, and at least some of the electronic components of the control board assembly 2 (such as the power device 21 that generates more heat) are thermally connected to the heat-conducting bracket 3. The vertical projection in this application refers to the projection formed by projecting the direction parallel to the central axis A of the motor 1 on a virtual plane perpendicular to the central axis A of the motor 1; for example, the vertical projection of the several power devices 21 is the projection formed by projecting the direction parallel to the central axis A of the motor 1 on a plane perpendicular to the central axis A of the motor 1. The central axis A of the motor 1 is also equivalent to the rotation axis of the shaft 50. In this embodiment, the central axis A of the motor 1 extends in the up-down direction. The central axis A of the motor 1 extends in the up-down direction.

[0044] The motor 1 also includes an insulating heat-conducting material, which fills the gap between the heat-conducting bracket 3 and the power device 21. The heat-conducting bracket 3 includes a plurality of first grooves 30 corresponding to the plurality of power devices 21. The plurality of first grooves 30 are recessed on the upper surface of the heat-conducting bracket 3. The power devices 21 respectively enter the corresponding first grooves 30 at least partially downward. The insulating heat-conducting material fills the gap between the first grooves 30 and the corresponding power devices 21 to improve the heat-conducting connection between the heat-conducting bracket 3 and the power device 21 and to ensure reliable insulation between the two. The existence of the first groove 30 is equivalent to defining an area. Based on the area range of the first groove 30, the insulating heat-conducting material can be used more accurately and effectively. The insulating heat-conducting material can be a heat-conducting resin glue, a silicone sheet, a heat-conducting silicone grease, etc. It can also be designed that the plurality of power devices 21 are directly attached to the heat-conducting bracket 3 to be heat-conductingly connected to the heat-conducting bracket 3, but the disadvantage of this is that it is difficult to ensure that the plurality of power devices 21 are sufficiently attached to the heat-conducting bracket 3 without the assistance of the insulating heat-conducting material.

[0045] In this embodiment, the power device 21 is a MOS tube (MOSFET, metal oxide semiconductor field effect transistor), which is welded to the bottom surface of the circuit board 20. The MOS tube is a patch-shaped component attached to the bottom surface of the circuit board 20. The insulating thermal conductive material is in a paste state. The insulating thermal conductive material can be applied to the first groove 30 and / or the power device 21. The insulating thermal conductive material completely covers the bottom surface of the MOS tube, and the vertical projection of each MOS tube is completely covered by the vertical projection of the thermal conductive bracket 3. Such a design promotes a reliable thermal connection between the MOS tube and the thermal conductive bracket 3, which is conducive to the rapid and efficient conduction of the heat of the MOS tube to the thermal conductive bracket 3; the first groove 30 can collect the paste-like insulating thermal conductive material to a certain extent, which is conducive to controlling the random overflow of the paste-like insulating thermal conductive material. Based on the first groove 30, it is conducive to more accurately controlling the amount of the paste-like insulating thermal conductive material. In this embodiment, the number of MOS tubes in the control board assembly 2 is six, and these six MOS tubes are dispersedly arranged on the bottom surface of the circuit board 20.

[0046] The motor 1 also includes a housing 12, an upper cover 130, and a first air outlet 14. The upper cover 130 and the housing 12 are located at the upper and lower sides of the heat-conducting bracket 3. The vertical projection of the upper cover 130 is completely within the range defined by the outer contour of the vertical projection of the heat-conducting bracket 3 to ensure that the coverage of the heat-conducting bracket 3 is large enough; the vertical projection of the stator assembly 4 is completely within the range defined by the outer contour of the vertical projection of the heat-conducting bracket 3 to ensure that the coverage of the heat-conducting bracket 3 is large enough; the stator assembly 4 includes a stator assembly 4. The stator core 40, the stator winding, the insulating frame 41, and the plurality of piercing terminals are arranged in the second accommodating cavity 101; the insulating frame 41 is made of plastic material, the insulating frame 41 is mounted on the stator core 40, the stator winding is wound around the insulating frame 41, and the plurality of piercing terminals are fixed on the insulating frame 41. The housing 12 surrounds at least a portion of the second accommodating cavity 101, and the first air outlet 14 is located on the periphery of the housing 12, surrounding the motor 101. The impeller 110 rotates to drive the air flow to form an exhaust airflow, and the exhaust airflow is discharged from the motor 1 through the first air outlet 14. The heat-conducting bracket 3 is disc-shaped, and the heat-conducting bracket 3 is perpendicular to the rotating shaft 50; the heat-conducting bracket 3 separates the first accommodating chamber 100 and the second accommodating chamber 101 from top to bottom, and the heat-conducting bracket 3 covers the upper end of the casing 12. The heat-conducting bracket 3 and the casing 12 define the second accommodating chamber 101, and the heat-conducting bracket 3 and the upper cover 130 define the first accommodating chamber 100; each puncture The terminal extends upward through the thermally conductive bracket 3 and into the first accommodating cavity 100 and is welded to the circuit board 20, and each pierced terminal does not contact the thermally conductive bracket 3; the upper cover 130 is locked to the housing 12 or the thermally conductive bracket 3, and the thermally conductive bracket 3 is locked to the housing 12. The upper cover 130 or the thermally conductive bracket 3 includes a plurality of first locking protrusions 31, and the circuit board 20 includes a plurality of first locking notches 200 corresponding to the plurality of first locking protrusions 31, and the plurality of first locking notches 200 are located around the circuit board 20. Based on the above design, the internal space of the motor 1 is easily distinguished for different uses, and the circuit board 20 and the heat-conducting bracket 3 are well fixed, ensuring that the relative position between the power device 21 on the circuit board 20 and the heat-conducting bracket 3 is stable and the heat-conducting connection is more reliable; when the circuit board 20 is installed on the upper side of the heat-conducting bracket 3, the first positioning protrusion 31 is engaged with the corresponding first positioning notch 200 to achieve the initial positioning of the circuit board 20; with the help of each piercing terminal being welded to the circuit board 20 and the first positioning protrusion 31 being engaged with the corresponding first positioning notch 200, the position of the circuit board 20 is stabilized.

[0047] The large capacitor 22 is accommodated in the first accommodating cavity 100. The large capacitor 22 is welded to the circuit board 20 and is placed upright on the circuit board 20. The large capacitor 22 is located on the upper side of the circuit board 20 facing away from the heat-conducting bracket 3. The control chip 23 and the plurality of power devices 21 are located on the upper and lower sides of the circuit board 20.

[0048] The motor 1 further comprises the plurality of first screws 150 and the plurality of second screws 151. The first positioning protrusion 31 is a part of the heat-conducting bracket 3. The first positioning protrusion 31 is formed with a plurality of first locking screw holes 310. The plurality of first screws 150 are correspondingly locked in the plurality of first locking screw holes 310 to lock the upper cover 130 to the heat-conducting bracket 3. The housing 12 is formed with a plurality of second locking screw holes 120. The plurality of second locking screw holes 120 are evenly distributed in the circumferential direction around the central axis A of the motor 1. The plurality of second screws 151 are correspondingly locked in the plurality of second locking screw holes 120 to lock the heat-conducting bracket 3 to the housing 12. With such a design, the heat-conducting bracket 3, the housing 12 and the upper cover 130 are stably fixed together. The first positioning protrusion 31 has the functions of both locking the upper cover 130 and positioning the circuit board 20, thereby enhancing the practicality of the first positioning protrusion 31.

[0049] The motor 1 further includes a positioning bracket 17, which is accommodated in the second accommodating chamber 101. The rotor assembly 5 further includes a magnetic ring 51, an upper bearing 52, and a lower bearing 53. The upper bearing 52 and the lower bearing 53 are assembled on the rotating shaft 50. The inner ring of the upper bearing 52 and the inner ring of the lower bearing 53 are respectively fixed to the rotating shaft 50. The rotating shaft 50 passes through the upper bearing 52 and the lower bearing 53. The positioning bracket 17 includes a first bearing accommodating portion 170. The housing 12 further includes a second bearing accommodating portion 121. The upper bearing 52 is installed in the first bearing accommodating portion 170, and the lower bearing 53 is installed in the second bearing accommodating portion 121. The positioning bracket 17 is made of metal material (such as aluminum, steel, copper, etc.). The stator core 40 and the rotor assembly 5 are thermally connected to the heat-conducting bracket 3 through the positioning bracket 17. With such a design, the rotor assembly 5 is effectively positioned relative to the stator core 40 with the help of the positioning bracket 17, and the heat generated by the stator core 40 and the rotor assembly 5 is conveniently conducted and diffused, which is highly practical. The stator assembly 4, the rotor assembly 5, and the control board assembly 2 are components of the motor 1 that generate more heat. In this design, the stator assembly 4, the rotor assembly 5, and the control board assembly 2 are thermally connected to the thermally conductive bracket 3, which is beneficial to the efficient conduction and diffusion of heat.

[0050] The positioning bracket 17 also includes a top plate 171, a boss portion 172, a first support arm 173, a second support arm 174, and a third support arm 175. The top plate 171 is upwardly abutted against the heat-conducting bracket 3, the boss portion 172 protrudes upward from the top plate 171, and the boss portion 172 faces away from the first bearing accommodating portion 170. The heat-conducting bracket 3 also includes a positioning opening 33 corresponding to the boss portion 172, the boss portion 172 is embedded in the positioning opening 33, and the outer peripheral surface of the boss portion 172 is abutted against the inner peripheral surface of the positioning opening 33, so that the positioning bracket 17 can be effectively connected to the heat-conducting bracket 3 by means of the top plate 171 and the boss portion 172 being abutted against the heat-conducting bracket 3; the first support arm 173, the second support arm 174, and the third support arm 175. The second support arm 174 and the third support arm 175 are respectively extended integrally from the top plate 171, and the first support arm 173, the second support arm 174, and the third support arm 175 are sequentially distributed in the circumferential direction around the central axis A of the motor 1, and the first support arm 173, the second support arm 174, and the third support arm 175 extend to the stator core 40 respectively, and the first support arm 173, the second support arm 174, and the third support arm 175 are respectively directly supported on the stator core 40, and the motor 1 also includes the plurality of third screws 152, and the heat generated by the stator core 40 can be efficiently conducted through the first support arm 173, the second support arm 174, and the third support arm 175. The first support arm 173, the second support arm 174, and the third support arm 175 are respectively locked to the housing 12 by a third screw 152; in another embodiment, the first bearing accommodating portion 170 or the support arms 173, 174, 175 can be integrated with the heat-conducting bracket 3; in yet another embodiment, the entire positioning bracket 17 and the heat-conducting bracket 3 can be integrated to form a single independent metal part with good thermal conductivity and good support and positioning properties, so as to reduce molding costs and assembly costs.

[0051] The diameter of the positioning opening 33 is smaller than the outer diameter of the lower bearing 53, and the diameter of the positioning opening 33 is larger than the outer diameter of the upper bearing 52. The projection of the upper bearing 52 projected on the heat-conducting bracket 3 in a direction parallel to the central axis A of the motor 1 can be completely accommodated in the positioning opening 33. From another perspective, the vertical projection of the upper bearing 52 is completely located within the range encircled by the outer peripheral contour of the vertical projection of the positioning opening 33; the outer peripheral contour of the projection of the lower bearing 53 projected on the heat-conducting bracket 3 in a direction parallel to the central axis A of the motor 1 is completely located outside the positioning opening 33. From another perspective, the vertical projection of the positioning opening 33 is completely located within the range encircled by the outer peripheral contour of the vertical projection of the lower bearing 53.

[0052] The boss portion 172 further includes a second positioning protrusion 1720, and the positioning opening 33 includes a second positioning notch 330 corresponding to the second positioning protrusion 1720. The second positioning protrusion 1720 protrudes in a direction away from the central axis A of the motor 1, and the second positioning protrusion 1720 is embedded in the second positioning notch 330 and abuts against the inner surface of the second positioning notch 330. Such a design is conducive to the accurate assembly and positioning of the heat-conducting bracket 3 relative to the positioning bracket 17 during installation, suppresses the rotation of the heat-conducting bracket 3 relative to the positioning bracket 17 during installation, and can also increase the heat-conducting contact area between the heat-conducting bracket 3 and the positioning bracket 17.

[0053] The first support arm 173 is also provided with a third positioning notch 1730, and the housing 12 further includes a third positioning protrusion 122, which protrudes from the inner circumference of the housing 12 toward the rotating shaft 50, and extends downward from the upper end of the housing 12, and is embedded in the third positioning notch 1730 and abuts against the inner surface of the third positioning notch 1730; the second positioning protrusion 1720 protrudes toward the side where the first support arm 173 is located, so as to point to the side where the third positioning protrusion 122 is located. With such a design, by means of the above correlation among the second positioning protrusion 1720, the third positioning protrusion 122, and the third positioning notch 1730, it is convenient to find the installation angle of the positioning bracket 17 relative to the housing 12 more quickly during installation, and the third positioning notch 1730 and the third positioning protrusion 122 guide the positioning bracket 17 to be installed downward into the housing 12, thereby improving the installation efficiency.

[0054] To facilitate the installation of the rotor, the outer diameter of the magnetic ring 51 and the outer diameter of the upper bearing 52 are smaller than the inner diameter of the stator core 40. During installation, the rotor assembly 5 is installed as a whole. Specifically, the lower bearing 53 is first assembled to the second bearing accommodating portion 121, and then the stator assembly 4 is placed into the second accommodating cavity 101 as a whole. During the placement of the stator assembly 4, the upper bearing 52 passes through the stator core 40, and then the positioning bracket 17 is installed on the stator core 40. After installation, the magnetic ring 51 and the stator core 40 are not misaligned.

[0055] The first air outlet 14 is located at the periphery of the casing 12, and is in a state of surrounding the central axis A of the motor 1; the impeller 110 rotates to drive the exhaust air flow formed by the air flow to be discharged from the motor 1 through the first air outlet 14, the heat-conducting bracket 3 includes a blowing heat dissipation portion 34, the blowing heat dissipation portion 34 is exposed to the outside of the motor 1, and the vertical projection of the blowing heat dissipation portion 34 surrounds the central axis A of the motor 1, the blowing heat dissipation portion 34 is located at the periphery of the upper end of the casing 12, and the blowing heat dissipation portion 34 is exposed to the periphery of the upper end of the casing 12 in a circular ring shape, and the vertical projection of the blowing heat dissipation portion 34 surrounds the vertical projection of the casing 12, and the blowing The air cooling part 34 is located above the first air outlet 14, and the vertical projection of the air cooling part 34 partially overlaps with the vertical projection of the first air outlet 14. The part where the vertical projection of the air cooling part 34 overlaps with the vertical projection of the first air outlet 14 surrounds the central axis A of the motor 1. The exhaust air flows upward through the first air outlet 14 and can cool the air cooling part 34. The exhaust air flows upward through the first air outlet 14 to the air cooling part 34, thereby cooling the air cooling part 34, effectively reducing the temperature of the heat-conducting bracket 3, and indirectly achieving the heat dissipation of the several power devices 21. The exhaust air flow is discharged upward from the motor 1 through the first air outlet 14; the air cooling part 3 is located on the lower side of the upper cover 130, and the vertical projection of the upper cover 130 is completely within the range defined by the outer peripheral contour of the vertical projection of the air cooling part 34, so as to facilitate a larger range of the air cooling part 34.

[0056] The heat-conducting bracket 3 and the upper cover 130 define a first accommodating cavity 100, and the heat-conducting bracket 3 and the housing 12 define a second accommodating cavity 101; the upper cover 130 is made of plastic material, the housing 12 is made of plastic material, and the heat-conducting bracket 3 is made of metal material (such as aluminum, steel, copper, etc.). The heat-conducting bracket 3 is installed at the upper end of the housing 12. The housing 12 also includes an annular upper end 123 and an upper port 124 surrounded by the annular upper end 123. The heat-conducting bracket 3 covers the upper port 124 to form the second accommodating cavity 101 with the housing 12. The housing 12 and the upper cover 130 are made of plastic material, which reduces the manufacturing and material costs and the difficulty of the insulation design of the housing 12 compared to the use of metal material. The heat-conducting bracket 3 made of metal material is used for heat conduction and heat dissipation, which specifically makes up for the shortcomings of the poor heat conduction and heat dissipation of the plastic housing 12. The top plate 171 is located in the upper port 124.

[0057] The air blowing heat dissipation part 34 includes the plurality of heat dissipation fins 340, which are located outside the motor 1 and at the bottom side of the air blowing heat dissipation part 34, and the plurality of heat dissipation fins 340 are arranged in a state surrounding the central axis A of the motor 1, and the plurality of heat dissipation fins 340 are sequentially distributed in the circumferential direction surrounding the central axis A of the motor 1, and the plurality of heat dissipation fins 340 are radially distributed on the periphery of the motor 1, and each heat dissipation fin 340 has a radial spacing D1 with the housing 12, and each radial spacing D1 is sequentially distributed in the circumferential direction surrounding the central axis A of the motor 1, and a part of the exhaust airflow flows through the radial spacing D1. Based on the radial spacing D1, the time for the airflow to flow through the heat dissipation fin 340 can be increased, so that the airflow can be more fully in contact with the heat dissipation fin 340 and absorb the heat of the heat dissipation fin 340, thereby enhancing the heat dissipation effect. The plurality of heat dissipation fins 340 are evenly distributed in the circumferential direction surrounding the central axis A of the motor 1.

[0058] The heat-conducting bracket 3 is located above the annular upper end 123, and a sealing ring 161 is sandwiched between the heat-conducting bracket 3 and the annular upper end 123 to achieve a sealed connection between the heat-conducting bracket 3 and the housing 12; the annular upper end 123 includes a second annular groove 1230 corresponding to the sealing ring 161, and the sealing ring 161 is placed in the second annular groove 1230. The sealing ring 161 and the second annular groove 1230 surround the central axis A of the motor 1 respectively, and the plurality of heat dissipating fins 340 are located radially outside the annular upper end 123. The radial interval D1 is located at the top of the exhaust chamber 60 and is a part of the exhaust chamber 60.

[0059] The annular upper end portion 123 further includes a first annular flange 1231, which surrounds the central axis A of the motor 1 and protrudes radially outward on the outer periphery of the housing 12. The plurality of heat dissipation fins 340 are distributed on the periphery of the first annular flange 1231, and the heat dissipation fins 340 extend downward beyond the first annular flange 1231. There is a radial gap D2 between each heat dissipation fin 340 and the first annular flange 1231, and the radial gap D2 extends upward from the corresponding radial interval D1. With such a design, the existence of the radial gap D2 promotes the airflow and the heat dissipation fins 340 to more fully absorb the heat of the heat dissipation fins 340.

[0060] The motor 1 further includes a first flexible sleeve 160, which is sleeved on the upper cover 130; the heat-conducting bracket 3 further includes a first annular protrusion 320 and a first annular groove 321, the first annular protrusion 320 is located on the upper side of the heat-conducting bracket 3, the first annular protrusion 320 protrudes upward, the first annular protrusion 320 surrounds the periphery of the first annular groove 321, the first annular groove 321 is recessed downward, the first annular protrusion 320 and the first annular groove 321 are arranged on the side of the air-blowing heat dissipation portion 34 facing away from the first air outlet 14; the first flexible sleeve 160 includes an annular sealing portion 1600, the annular sealing portion 160 00 comprises an annular sealing flange 1601 and an annular lower end edge 1602. The cross section of the annular sealing portion 1600 is L-shaped. The annular sealing flange 1601 is radially outwardly protruding on the outer periphery of the first flexible sleeve 160. The annular lower end edge 1602 protrudes downward relative to the annular sealing flange 1601. The first annular protrusion 320, the first annular groove 321, the annular sealing flange 1601, and the annular lower end edge 1602 surround the central axis A of the motor 1 respectively. The annular sealing flange 1601 is downwardly attached to the first annular protrusion 320, and the annular lower end edge 1602 is downwardly embedded in the first annular groove 321. With the design of the first annular protrusion 320, the first annular groove 321, the annular lower end edge 1602, the annular sealing flange 1601, etc., the sealing between the lower end of the first flexible sleeve 160 and the heat-conducting bracket 3 is significantly enhanced.

[0061] The annular sealing flange 1601 extends radially outward beyond the first annular protrusion 320, and the vertical projection of the heat-conducting bracket 3 is completely located within the range defined by the outer peripheral contour of the vertical projection of the annular sealing flange 1601, so as to improve the sealing performance;

[0062] The heat-conducting bracket 3 also includes a second annular protrusion 322, which is located on the upper side of the heat-conducting bracket 3. The first annular protrusion 320 and the second annular protrusion 322 protrude upward from the air-blowing heat dissipation portion 34 respectively. The second annular protrusion 322 surrounds the central axis A of the motor 1. The interval between the first annular protrusion 320 and the second annular protrusion 322 constitutes a first annular groove 321. The upper cover 130 is locked to the heat-conducting bracket 3, and the lower end of the upper cover 130 is downwardly abutted against the second annular protrusion 322. The lower end of the upper cover 130 is downwardly abutted against the second annular protrusion 322 to improve the sealing property of the joint between the lower end of the upper cover 130 and the second annular protrusion 322.

[0063] The insulating frame 41 is insulated and isolated between the stator core 40 and the stator winding. The rotor assembly 5 passes through the central area 44 of the stator core 40 and the insulating frame 41 from top to bottom. The stator winding is wound on the insulating frame 41. The insulating frame 41 has both the insulating isolation function between the stator core 40 and the stator winding and the function of providing winding. The insulating frame 41 includes an upper frame 42 and a lower frame 43. The upper frame 42 and the lower frame 43 respectively constitute a single integrally formed part. The upper frame 42 is assembled from the upper side of the stator core 40 to the stator core. 40, the upper frame 42 covers the stator core 40 downward, the lower frame 43 is assembled to the stator core 40 from the lower side of the stator core 40, and the lower frame 43 covers the stator core 40 upward. The upper frame 42 and the lower frame 43 are connected up and down to form an insulating frame 41. The upper frame 42 and the lower frame 43 slightly interfere with the stator core 40 respectively, so that they can be easily fixed to the stator core 40, and when the insulating frame 41 is wound with enameled wire to form a stator winding, the insulating frame 41 and the stator core 40 do not shake relative to each other. The stator winding includes a first winding 450, a second winding 451, and a third winding 452. The first winding 450, the second winding 451, and the third winding 452 are respectively formed by winding a single enameled wire. The upper frame 42 and the lower frame 43 also jointly form a first winding portion 410, a second winding portion 411, and a third winding portion 412. The first winding portion 410, the second winding portion 411, and the third winding portion 412 are evenly distributed in the circumferential direction around the central axis A of the motor 1. The first winding 450 is wound around the first winding portion 410, the second winding 451 is wound around the second winding portion 411, and the third winding 452 is wound around the third winding portion 412. The plurality of piercing terminals are fixed on the insulating frame 41, and the plurality of piercing terminals include a first piercing terminal 46, a second piercing terminal 47, and a third piercing terminal 48. The piercing terminal 48, the first piercing terminal 46, the second piercing terminal 47, and the third piercing terminal 48 are evenly distributed in the circumferential direction around the central axis A of the motor 1; the stator assembly 4 is also formed with a first vertical spacing groove 490, a second vertical spacing groove 491, and a third vertical spacing groove 492, and the first vertical spacing groove 490, the second vertical spacing groove 491, and the third vertical spacing groove 492 are evenly distributed in the circumferential direction around the central axis A of the motor 1; the first vertical spacing groove 490 is located between the inner end of the first winding part 410 and the inner end of the second winding part 411, the second vertical spacing groove 491 is located between the inner end of the second winding part 411 and the inner end of the third winding part 412, and the third vertical spacing groove 492 is located between the inner end of the third winding part 412 and the inner end of the first winding part 410;The vertical projections of the stator core 40 and the upper frame 42 are completely located within the range defined by the outer contour of the vertical projection of the heat-conducting bracket 3. The upper frame 42 includes a first portion 420, a second portion 421, and a third portion 422. The first portion 420, the second portion 421, and the third portion 422 extend upward toward the heat-conducting bracket 3, respectively. The first portion 420 is formed with a first slot 4200 for the first piercing terminal 46 to be plugged in, the second portion 421 is formed with a second slot 4210 for the second piercing terminal 47 to be plugged in, and the third portion 422 is formed with a third slot 4220 for the third piercing terminal 48 to be plugged in; the first slot 4200, the second slot 4210, and the third slot 4220 are formed with a third slot 4220 for the third piercing terminal 48 to be plugged in. 4220 are respectively in a state of opening upwardly facing the heat-conducting bracket 3; the first part 420, the second part 421, and the third part 422 are evenly distributed in the circumferential direction around the central axis A of the motor 1; the first support arm 173, the first part 420, the second support arm 174, the second part 421, the third support arm 175, and the third part 422 are sequentially distributed in the circumferential direction around the central axis A of the motor 1; the first part 420 and the third support arm 175 are located on opposite sides of the rotating shaft 50 in the radial direction, the second part 421 and the first support arm 173 are located on opposite sides of the rotating shaft 50 in the radial direction, and the third part 422 and the second support arm 174 are located on opposite sides of the rotating shaft 50 in the radial direction; In the radial direction of the motor 1, the first vertical spacing groove 490 is located between the first part 420 and the rotating shaft 50; in the radial direction of the motor 1, the second vertical spacing groove 491 is located between the second part 421 and the rotating shaft 50; in the radial direction of the motor 1, the third vertical spacing groove 492 is located between the third part 422 and the rotating shaft 50; the first part 420 and the third winding part 412 are located on opposite sides of the rotating shaft 50 in the radial direction, the second part 421 and the first winding part 410 are located on opposite sides of the rotating shaft 50 in the radial direction, and the third part 422 and the second winding part 411 are located on opposite sides of the rotating shaft 50 in the radial direction; the first winding 450 includes a first left lead wire, a first right lead wire, and a second winding 451 includes a second left lead wire and a second right lead wire, and the third winding 452 includes a third left lead wire and a third right lead wire. The first left lead wire and the first right lead wire constitute the opposite end lead wires of the first winding 450, the second left lead wire and the second right lead wire constitute the opposite end lead wires of the second winding 451, and the third left lead wire and the third right lead wire constitute the opposite end lead wires of the third winding 452. The first right lead wire and the second left lead wire are directly connected to the first piercing terminal 46 respectively; the second right lead wire and the third left lead wire are directly connected to the second piercing terminal 47 respectively; the third right lead wire and the first left lead wire are directly connected to the third piercing terminal 48 respectively. Such an arrangement facilitates the smoother and more orderly manufacture of the stator assembly 4, and is conducive to improving the manufacturing efficiency and yield. ;

[0064] The upper skeleton 42 also includes a circular portion 423, which surrounds the central axis A of the motor 1. The first portion 420, the second portion 421, and the third portion 422 extend upward from the circular portion 423 respectively. A portion of the first winding portion 410, a portion of the second winding portion 411, and a portion of the third winding portion 412 extend radially inward from the circular portion 423 respectively. The circular portion 423 connects the first winding portion 410, the first portion 420, the second winding portion 411, the second portion 421, the third winding portion 412, and the third portion 422 in sequence along the circumferential direction surrounding the central axis A of the motor 1. Such an arrangement facilitates smoother and more orderly manufacturing of the stator assembly 4, and is beneficial to improving manufacturing efficiency and yield.

[0065] The magnetic ring 51 is fixed to and surrounds the rotating shaft 50, and the magnetic ring 51 is at least partially located in the central area 44 of the stator core 40 and the insulating frame 41; the first right lead wire and the second left lead wire can be respectively inserted into the first piercing terminal 46 upward; the second right lead wire and the third left lead wire can be respectively inserted into the second piercing terminal 47 upward; the third right lead wire and the first left lead wire can be respectively inserted into the third piercing terminal 48 upward; the first piercing terminal 46 includes a first left wire clamping groove 460, a first right wire slot 461, the second piercing terminal 47 includes a second left wire slot 470, a second right wire slot 471, the third piercing terminal 48 includes a third left wire slot 480, a third right wire slot 481, the first left wire slot 460, the first right wire slot 461, the second left wire slot 470, the second right wire slot 471, the third left wire slot 480, and the third right wire slot 481 are sequentially distributed in the circumferential direction around the central axis A of the motor 1;

[0066] The first right lead wire is inserted into the first left wire slot 460 and interferes with the first left wire slot 460, so that the first piercing terminal 46 destroys the paint layer on the surface of the first right lead wire and is electrically connected to the first right lead wire; specifically, as the first piercing terminal 46 is inserted downward into the first portion 420, the first right lead wire is inserted into the first left wire slot 460 and the paint layer on the surface of the first right lead wire is scratched by the first piercing terminal 46, so that the first right lead wire is electrically connected to the first piercing terminal 46. ; The second left lead wire is inserted into the first right wire slot 461 and interferes with the first right wire slot 461, so that the first piercing terminal 46 destroys the paint layer on the surface of the second left lead wire and is electrically connected to the second left lead wire; specifically, as the first piercing terminal 46 is inserted downward into the first portion 420, the second left lead wire is inserted into the first right wire slot 461 and the paint layer on the surface of the second left lead wire is scratched by the first piercing terminal 46, so that the second left lead wire is electrically connected to the first piercing terminal 46;

[0067] The first part 420 also includes a first left inner wiring groove 4201, a first right inner wiring groove 4202, a first inner protrusion 4203 separating the first left inner wiring groove 4201 and the first right inner wiring groove 4202, a first left outer wiring groove 4204, a first right outer wiring groove 4205, and a first outer protrusion 4206 separating the first left outer wiring groove 4204 and the first right outer wiring groove 4205. The first inner protrusion 4203 and the first outer protrusion 4206 extend toward the heat conduction bracket 3 respectively; along the radial direction of the motor 1, the first left outer wiring groove 4204, the first left clamping groove 460, the first left inner wiring groove 4201, and the rotor assembly 5 are arranged in sequence from the outside to the inside. Distribution; along the radial direction of the motor 1, the first right outer wiring groove 4205, the first right wire clamping groove 461, the first right inner wiring groove 4202, and the rotor assembly 5 are distributed from the outside to the inside in sequence; the first right lead-out line is embedded in the first left outer wiring groove 4204, the first left wire clamping groove 460 and the first left inner wiring groove 4201; the second left lead-out line is embedded in the first right outer wiring groove 4205, the first right wire clamping groove 461 and the first right inner wiring groove 4202; the first right lead-out line can be embedded downwardly in the first left outer wiring groove 4204 and the first left inner wiring groove 4201; the second left lead-out line can be embedded downwardly in the first right outer wiring groove 4205 and the first right inner wiring groove 4202;

[0068] The second right lead wire is inserted into the second left wire slot 470 and interferes with the second left wire slot 470, so that the second piercing terminal 47 destroys the paint layer on the surface of the second right lead wire and is electrically connected to the second right lead wire; specifically, as the second piercing terminal 47 is inserted downward into the second portion 421, the second right lead wire is inserted into the second left wire slot 470 and the paint layer on the surface of the second right lead wire is scratched by the second piercing terminal 47, so that the second right lead wire is electrically connected to the second piercing terminal 47; The third left lead wire is inserted into the second right wire clamping groove 471 and interferes with the second right wire clamping groove 471, so that the second piercing terminal 47 destroys the paint layer on the surface of the third left lead wire and is electrically connected to the third left lead wire; specifically, as the second piercing terminal 47 is inserted downward into the second portion 421, the third left lead wire is inserted into the second right wire clamping groove 471 and the paint layer on the surface of the third left lead wire is scratched by the second piercing terminal 47, so that the third left lead wire is electrically connected to the second piercing terminal 47;

[0069] The second portion 421 further includes a second left inner wiring groove 4211, a second right inner wiring groove 4212, a second inner protrusion 4213 separating the second left inner wiring groove 4211 and the second right inner wiring groove 4212, a second left outer wiring groove 4214, a second right outer wiring groove 4215, and a second outer protrusion 4216 separating the second left outer wiring groove 4214 and the second right outer wiring groove 4215, the second inner protrusion 4213 and the second outer protrusion 4216 respectively extending toward the heat transfer bracket 3; along the radial direction of the motor 1, the second left outer wiring groove 4214, the second left clamping groove 470, the second left inner wiring groove 4211, and the rotor assembly 5 are arranged in sequence from the outside to the inside. Distribution; along the radial direction of the motor 1, the second right outer wiring groove 4215, the second right wire clamping groove 471, the second right inner wiring groove 4212, and the rotor assembly 5 are distributed from the outside to the inside in sequence; the second right lead-out line is embedded in the second left outer wiring groove 4214, the second left wire clamping groove 470 and the second left inner wiring groove 4211; the third left lead-out line is embedded in the second right outer wiring groove 4215, the second right wire clamping groove 471 and the second right inner wiring groove 4212; the second right lead-out line can be embedded downwardly in the second left outer wiring groove 4214 and the second left inner wiring groove 4211; the third left lead-out line can be embedded downwardly in the second right outer wiring groove 4215 and the second right inner wiring groove 4212;

[0070] The third right lead wire is inserted into the third left wire slot 480 and interferes with the third left wire slot 480, so that the third piercing terminal 48 destroys the paint layer on the surface of the third right lead wire and is electrically connected to the third right lead wire; specifically, as the third piercing terminal 48 is inserted downward into the third portion 422, the third right lead wire is inserted into the third left wire slot 480 and the paint layer on the surface of the third right lead wire is scratched by the third piercing terminal 48, so that the third right lead wire is electrically connected to the third piercing terminal 48; The first left lead wire is inserted into the third right wire slot 481 and interferes with the third right wire slot 481, so that the third piercing terminal 48 destroys the paint layer on the surface of the first left lead wire and is electrically connected to the first left lead wire; specifically, as the third piercing terminal 48 is inserted downward into the third portion 422, the first left lead wire is inserted into the third right wire slot 481 and the paint layer on the surface of the first left lead wire is scratched by the third piercing terminal 48, so that the first left lead wire is electrically connected to the third piercing terminal 48;

[0071] The third portion 422 further includes a third left inner wiring groove 4221, a third right inner wiring groove 4222, a third inner protrusion 4223 separating the third left inner wiring groove 4221 from the third right inner wiring groove 4222, a third left outer wiring groove 4224, a third right outer wiring groove 4225, and a third outer protrusion 4226 separating the third left outer wiring groove 4224 from the third right outer wiring groove 4225, the third inner protrusion 4223 and the third outer protrusion 4226 respectively extending toward the heat conduction bracket 3; along the radial direction of the motor 1, the third left outer wiring groove 4224, the third left clamping groove 480, the third left inner wiring groove 4221, and the rotor assembly 5 are arranged in sequence from the outside to the inside. Distribution; along the radial direction of the motor 1, the third right outer wiring groove 4225, the third right wire clamping groove 481, the third right inner wiring groove 4222, and the rotor assembly 5 are distributed from the outside to the inside in sequence; the third right lead-out line is embedded in the third left outer wiring groove 4224, the third left wire clamping groove 480 and the third left inner wiring groove 4221; the first left lead-out line is embedded in the third right outer wiring groove 4225, the third right wire clamping groove 481 and the third right inner wiring groove 4222; the third right lead-out line can be embedded downwardly in the third left outer wiring groove 4224 and the third left inner wiring groove 4221; the first left lead-out line can be embedded downwardly in the third right outer wiring groove 4225 and the third right inner wiring groove 4222;

[0072] Such an arrangement facilitates the more convenient connection between each lead wire and the corresponding piercing terminal, and improves the connection reliability. The first inner protrusion 4203, the first outer protrusion 4206, the second inner protrusion 4213, the second outer protrusion 4216, the third inner protrusion 4223, and the third outer protrusion 4226 protrude upwards respectively.

[0073] The first piercing terminal 46 further includes a first left convex thorn 462 and a first right convex thorn 463. The first piercing terminal 46 is fixed to the first portion 420 by means of the first left convex thorn 462 and the first right convex thorn 463. The first left convex thorn 462, the first left wire clamping groove 460, the first right wire clamping groove 461, and the first right convex thorn 463 are sequentially arranged. The first left convex thorn 462 and the first right convex thorn 463 respectively accompany the first piercing terminal 46 to enter the first slot 4200 downward. The first left convex thorn 462 and the first right convex thorn 463 respectively interfere with the first portion 420, so that the first piercing terminal 46 is fixed to the first portion 420.

[0074] The second piercing terminal 47 includes a second left convex thorn 472 and a second right convex thorn 473. The second piercing terminal 47 is fixed to the second portion 421 by means of the second left convex thorn 472 and the second right convex thorn 473. The second left convex thorn 472, the second left wire clamping groove 470, the second right wire clamping groove 471, and the second right convex thorn 473 are sequentially arranged. The second left convex thorn 472 and the second right convex thorn 473 respectively accompany the second piercing terminal 47 to enter the second slot 4210 downward. The second left convex thorn 472 and the second right convex thorn 473 respectively interfere with the second portion 421, so that the second piercing terminal 47 is fixed to the second portion 421.

[0075] The third piercing terminal 48 includes a third left convex thorn 482 and a third right convex thorn 483. The third piercing terminal 48 is fixed to the third portion 422 by means of the third left convex thorn 482 and the third right convex thorn 483. The third left convex thorn 482, the third left wire clamping groove 480, the third right wire clamping groove 481, and the third right convex thorn 483 are sequentially arranged; the third left convex thorn 482 and the third right convex thorn 483 respectively accompany the third piercing terminal 48 to enter the third slot 4220 downward, and the third left convex thorn 482 and the third right convex thorn 483 respectively interfere with the third portion 422, so that the third piercing terminal 48 is fixed to the third portion 422;

[0076] The first left ridge 462, the first right ridge 463, the second left ridge 472, the second right ridge 473, the third left ridge 482, and the third right ridge 483 are sequentially distributed in the circumferential direction around the central axis A of the motor 1;

[0077] The tips of the first left convex thorn 462 and the first right convex thorn 463 are respectively directly against the inner surface of the first part 420, and the heights of the tips of the first left convex thorn 462 and the first right convex thorn 463 are not higher than the upper ends of the first left wire clamping groove 460 and the upper ends of the first right wire clamping groove 461. The first left convex thorn 462 faces away from the first left wire clamping groove 460, and the first right convex thorn 463 faces away from the first right wire clamping groove 461. The first part 420 presses the first left convex thorn 462 and the first right convex thorn 463 against each other, so that the first left wire clamping groove 460 and the first right wire clamping groove 461 tend to be narrowed, so as to facilitate the first left wire clamping groove 460 and the first right wire clamping groove 461 to more tightly clamp the corresponding first right lead wire and the second left lead wire, and promote the first piercing terminal 46 to destroy the paint layer on the first right lead wire and the second left lead wire;

[0078] The tips of the second left convex thorn 472 and the second right convex thorn 473 are respectively directly against the inner surface of the second part 421, and the heights of the tips of the second left convex thorn 472 and the second right convex thorn 473 are not higher than the upper ends of the second left wire clamping groove 470 and the upper ends of the second right wire clamping groove 471. The second left convex thorn 472 faces away from the second left wire clamping groove 470, and the second right convex thorn 473 faces away from the second right wire clamping groove 471. The second part 421 presses the second left convex thorn 472 and the second right convex thorn 473 against each other, so that the second left wire clamping groove 470 and the second right wire clamping groove 471 tend to be narrowed, thereby facilitating the second left wire clamping groove 470 and the second right wire clamping groove 471 to more tightly clamp the corresponding second right lead wire and the third left lead wire, and promoting the second piercing terminal 47 to destroy the paint layer on the second right lead wire and the third left lead wire;

[0079] The tips of the third left convex thorn 482 and the third right convex thorn 483 are directly against the inner surface of the third part 422 respectively, and the heights of the tips of the third left convex thorn 482 and the third right convex thorn 483 do not exceed the upper ends of the third left wire clamping groove 480 and the upper ends of the third right wire clamping groove 481. The third left convex thorn 482 faces away from the third left wire clamping groove 480, and the third right convex thorn 483 faces away from the third right wire clamping groove 481. The third part 422 produces opposite pressure on the third left convex thorn 482 and the third right convex thorn 483, so that the third left wire clamping groove 480 and the third right wire clamping groove 481 tend to narrow, thereby facilitating the third left wire clamping groove 480 and the third right wire clamping groove 481 to more tightly clamp the corresponding third right lead wire and the first left lead wire, thereby promoting the third piercing terminal 48 to destroy the paint layer on the third right lead wire and the first left lead wire.

[0080] The first part 420 further includes a first left top block 4207 and a first right top block 4208, which are spaced apart and arranged in the first slot 4200. The second part 421 further includes a second left top block 4217 and a second right top block 4218, which are spaced apart and arranged in the second slot 4210. The third part 422 further includes a third left top block 4227 and a third right top block 4228. The third left top block 4227 and the third right top block 4228 are arranged in the third slot 4220 at intervals, and the first left top block 4207, the first right top block 4208, the second left top block 4217, the second right top block 4218, the third left top block 4227, and the third right top block 4228 are sequentially distributed in the circumferential direction around the central axis A of the motor 1, and the first left top block 4207, the first right top block 4208, the second left top block 4217, the second right top block 4218, The third left top block 4227 and the third right top block 4228 protrude toward the heat conduction bracket 3 respectively; the first left top block 4207 is located below the first right lead-out line and embedded in the lower end of the first left wire clamping groove 460, and the first right top block 4208 is located below the second left lead-out line and embedded in the lower end of the first right wire clamping groove 461; the second left top block 4217 is located below the second right lead-out line and embedded in the lower end of the second left wire clamping groove 470, and the second right top block 4218 is located below the third left lead-out line The third left top block 4227 is located below the third right lead-out line and embedded in the lower end of the third left wire slot 480, and the third right top block 4228 is located below the first left lead-out line and embedded in the lower end of the third right wire slot 481; with such a design, the existence of each top block is conducive to ensuring that each lead-out line can enter the corresponding wire slot from the lower end of each wire slot, thereby ensuring the connection between each lead-out line and each piercing terminal. The first left top block 4207, the first right top block 4208, the second left top block 4217, the second right top block 4218, the third left top block 4227, and the third right top block 4228 protrude upward respectively;

[0081] The first piercing terminal 46 also includes a first main body 464 and a first extension arm 465. The first main body 464 is plugged into the first slot 4200, and the first extension arm 465 extends from the first main body 464. The first left wire clamping groove 460, the first right wire clamping groove 461, the first left convex thorn 462, and the first right convex thorn 463 are provided on the first main body 464. The second piercing terminal 47 also includes a second main body 474 and a second extension arm 475. The second main body 474 is plugged into the second slot 4210, and the second extension arm 475 extends from the second The main body 474 extends out, and the second left wire slot 470, the second right wire slot 471, the second left convex thorn 472, and the second right convex thorn 473 are provided on the second main body 474; the third piercing terminal 48 also includes a third main body 484 and a third extension arm 485, the third main body 484 is plugged into the third slot 4220, and the third extension arm 485 extends from the third main body 484, and the third left wire slot 480, the third right wire slot 481, the third left convex thorn 482, and the third right convex thorn 483 are provided on the third main body 484;

[0082] The first extension arm 465, the second extension arm 475, and the third extension arm 485 are respectively welded to the circuit board 20, and the circuit board 20 is provided with three welding holes corresponding to the first extension arm 465, the second extension arm 475, and the third extension arm 485; the heat conductive bracket 3 is provided with a first through hole 350, a second through hole 351, and a third through hole 352, and the first through hole 350, the second through hole 351, and the third through hole 352 are evenly distributed in the circumferential direction around the central axis A of the motor 1;

[0083] The first extension arm 465 passes through the heat-conducting bracket 3 via the first through hole 350, the first extension arm 465 does not contact the heat-conducting bracket 3, and the minimum distance between the first extension arm 465 and the heat-conducting bracket 3 is greater than 0.8 mm and less than 2.5 mm (for example, 1.1 mm, 1.5 mm, 2 mm, etc., to effectively avoid electrical connection between the first extension arm 465 and the heat-conducting bracket 3);

[0084] The second extension arm 475 passes through the heat-conducting bracket 3 via the second through hole 351, the second extension arm 475 does not contact the heat-conducting bracket 3, and the minimum distance between the second extension arm 475 and the heat-conducting bracket 3 is greater than 0.8 mm and less than 2.5 mm (for example, 1.1 mm, 1.5 mm, 2 mm, etc., to effectively avoid electrical connection between the second extension arm 475 and the heat-conducting bracket 3);

[0085] The third extension arm 485 passes through the thermally conductive bracket 3 via the third through hole 352, and the third extension arm 485 does not contact the thermally conductive bracket 3. The minimum spacing between the third extension arm 485 and the thermally conductive bracket 3 is greater than 0.8 mm and less than 2.5 mm (for example, 1.1 mm, 1.5 mm, 2 mm, etc., to effectively avoid electrical connection between the third extension arm 485 and the thermally conductive bracket 3).

[0086] The motor 1 further includes a hood 131, a fixed impeller 111, an annular wall 180, a plurality of connecting plates 181, and an anti-rotation block 190; the vertical projection of the hood 131 at least partially overlaps with the vertical projection of the heat-conducting bracket 3, the hood 131 covers the impeller 110, and the hood 131 surrounds at least a portion of the third accommodating chamber 102, the third accommodating chamber 102 is formed between the hood 131 and the casing 12, the first air outlet 14 is formed between the annular wall 180 and the casing 12, the annular wall 180 surrounds the casing 12, and the annular wall 180 is radially spaced from the casing 12 to form the first air outlet 14; the fixed impeller 111 is located downstream of the impeller 110, the first air outlet 14 is located downstream of the fixed impeller 111, and the annular wall 180 is located downstream of the fixed impeller 111. 0 is located above the hood 131, the annular wall 180 and the hood 131 are butted together up and down, the first air outlet 14 faces upward, the plurality of connecting plates 181 are respectively connected to the annular wall 180 as a whole, the plurality of connecting plates 181 are respectively connected to the annular wall 180, the plurality of connecting plates 181 are respectively connected to the annular wall 180 and the casing 12, the plurality of connecting plates 181 are located in the first air outlet 14 and are sequentially distributed in the circumferential direction around the central axis A of the motor 1, the plurality of connecting plates 181 are radially distributed on the periphery of the casing 12, the stator 111 is upwardly connected to the plurality of connecting plates 181, the impeller 110 rotates to drive the exhaust airflow formed by the air flow to flow through the stator 111 and the first air outlet 14 in sequence and be discharged from the motor 1; the motor 1 may be a brushless motor.

[0087] The motor 1 is located inside the fan device 6, and the fan device 6 also includes a fan housing and an exhaust chamber 60. The motor 1 is located inside the fan housing, and the exhaust chamber 60 is formed between the fan housing and the motor 1. The exhaust chamber 60 is defined between the fan housing and the motor 1, and the exhaust airflow is discharged from the motor 1 into the exhaust chamber 60. The motor 1 exhausts air into the exhaust chamber 60 through the first air outlet 14, and the exhaust airflow is discharged from the motor 1 through the first air outlet 14 and discharged into the exhaust chamber 60.

[0088] The fan housing includes a first housing 61, a second housing 62, and a third flexible sealing gasket 63 sandwiched between the first housing 61 and the second housing 62. The third flexible sealing gasket 63 surrounds the periphery of the motor 1. The first housing 61 is located above the second housing 62. The first housing 61 and the second housing 62 are butted together. The lower end of the first housing 61 and the upper end of the second housing 62 are butted up and down. The third flexible sealing gasket 63 is sandwiched between the lower end of the first housing 61 and the upper end of the second housing 62. The third flexible sealing gasket 63 strengthens the sealing of the butt joint between the first housing 61 and the second housing 62 to prevent the exhaust airflow from leaking from the butt joint between the first housing 61 and the second housing 62.

[0089] The first flexible sleeve 160 is sleeved on the upper part of the motor 1, and the first flexible sleeve 160 is sandwiched between the upper part of the motor 1 and the first cover 61. The first cover 61 includes a first rib 610, and the first rib 610 surrounds the first flexible sleeve 160. The first rib 610, the annular sealing flange 1601, and the air blowing and heat dissipation portion 34 are located at the upper part of the exhaust chamber 60. The first rib 610 presses downward on the annular sealing flange 1601 so that the annular sealing flange 1601 presses downward on the first annular protrusion 320. Such a design enhances the sealing performance of the upper part of the exhaust chamber 60, and suppresses the leakage of the exhaust airflow from the upper part of the exhaust chamber 60. The first flexible sleeve 160 has both shock absorption and sealing functions.

[0090] The motor 1 also includes a second flexible sleeve 162, the wind shield 131 includes a first air inlet 1310, the first air inlet 1310 is located below the impeller 110, the second flexible sleeve 162 includes a second air inlet 1620, the second flexible sleeve 162 is sleeved on the wind shield 131, the first air inlet 1310 constitutes the air inlet of the third accommodating chamber 102, and the first air inlet 1310 is located between the second air inlet 1620 and the third accommodating chamber 102; the fan housing also includes a third air inlet 620, the second air inlet The port 1620 is located between the third air inlet 620 and the first air inlet 1310; the first air inlet 1310, the second air inlet 1620, and the third air inlet 620 are sequentially stacked together; the impeller 110 can rotate under the drive of the rotating shaft 50 to generate a pollutant suction airflow, and the pollutant suction airflow continues to flow downstream after flowing to the impeller 110 to form an exhaust airflow, and the pollutant suction airflow is used to suck up the stolen goods, and the pollutant suction airflow sequentially flows through the third air inlet 620, the second air inlet 1620, and the first air inlet 1310. The first flexible sleeve 160 and the second flexible sleeve 162 can be made of rubber. The vertical projection of the hood 131 is completely within the range defined by the outer peripheral contour of the vertical projection of the air-blowing heat-dissipating portion 34, thereby ensuring that the range of the heat-conducting bracket 3 and its air-blowing heat-dissipating portion 34 is large, which is conducive to improving the heat conduction and heat dissipation effect; the outer peripheral surface of the air-blowing heat-dissipating portion 34 is radially spaced from the first housing 61, and an annular gap D3 is formed between the outer peripheral surface of the air-blowing heat-dissipating portion 34 and the first housing 61, and the annular gap D3 is located at the top of the exhaust chamber 60 and constitutes a part of the exhaust chamber 60. The annular gap D3 is conducive to using the outer peripheral surface of the air-blowing heat-dissipating portion 34 for heat dissipation, thereby improving the heat dissipation effect. In this embodiment, the first annular protrusion 320 is a part of the air-blowing heat-dissipating portion 34, and the outer peripheral surface of the first annular protrusion 320 is radially spaced from the first housing 61. The gap formed between the outer peripheral surface of the first annular protrusion 320 and the first housing 61 constitutes a part of the annular gap D3. Such a design is conducive to improving the heat dissipation effect.

[0091] The fan cover also includes a bell-mouth portion 640, which is located below the motor 1, the flared end 6400 of the bell-mouth portion 640 is relatively far away from the motor 1, and the narrow end 6401 of the bell-mouth portion 640 is relatively close to the motor 1, the flared end 6400, the narrow end 6401, the third air inlet 620, the second air inlet 1620, and the first air inlet 1310 are distributed in sequence from bottom to top, and the narrow end 6401, the third air inlet 620, the second air inlet 1620, and the first air inlet 1310 are superimposed on each other from bottom to top, and the polluted airflow flows through the flared end 6400, the narrow end 6401, the third air inlet 620, the second air inlet 1620, and the first air inlet 1310 in sequence; the flared end 6400 of the bell-mouth portion 640 is inclined relative to the first plane, and the first plane is parallel to the central axis A of the motor 1.

[0092] The fan housing also includes a second air outlet 641 and at least one air outlet channel, and the exhaust airflow is discharged from the fan device 6 via the second air outlet 641; the at least one air outlet channel fluid is connected to the exhaust chamber 60, and the exhaust airflow flows through the exhaust chamber 60, the at least one air outlet channel, and the second air outlet 641 in sequence after being discharged from the motor 1, thereby being discharged from the fan device 6; the at least one air outlet channel includes a first air outlet channel 6210 and a second air outlet channel 6220, and the first air outlet channel 6210 and the second air outlet channel 6220 are located on the left and right sides of the bell-mouth portion 640; a part of the exhaust airflow flows through the exhaust chamber 60, the first air outlet channel 6210, and the second air outlet 641 in sequence, and another part of the exhaust airflow flows through the exhaust chamber 60, the second air outlet channel 6220, and the second air outlet 641 in sequence. With the help of the first air outlet channel 6210 and the second air outlet channel 6220 located on the left and right sides of the bell-mouth portion 640, the air discharge of the fan device 6 is more balanced and smooth;

[0093] The first air outlet channel 6210 and the second air outlet channel 6220 extend downward respectively; the fan cover also includes a bottom cover 64, the bell-mouth portion 640 is a part of the bottom cover 64, the third air inlet 620 is opened in the second cover 62, the second cover 62 also includes a first support portion 621 and a second support portion 622, the first support portion 621 and the second support portion 622 are located on the left and right sides of the bell-mouth portion 640, the first support portion 621 and the second support portion 622 extend downward respectively, the first support portion 621 is hollow to form the first air outlet channel 6210 therein, the second support portion 622 is hollow to form the second air outlet channel 6220 therein; the second air outlet 641 is opened in the bottom cover 64. With the support of the first support part 621 and the second support part 622 on the left and right sides of the bell mouth part 640, the structure of the fan device 6 is more stable and balanced; the first support part 621 and the second support part 622 are used to form the first air outlet channel 6210 and the second air outlet channel 6220, which is clever and practical.

[0094] The second cover shell 62 also includes a first inclined wall 623 and a second inclined wall 624, which are located at the bottom of the exhaust chamber 60. The first inclined wall 623 extends obliquely downward toward the first air outlet channel 6210 to guide the airflow to flow toward the first air outlet channel 6210; the second inclined wall 624 extends obliquely downward toward the second air outlet channel 6220 to guide the airflow to flow toward the second air outlet channel 6220.

[0095] The fan device 6 also includes a first flexible sealing gasket 650 and a second flexible sealing gasket 651. The third accommodating chamber 102 is formed between the bottom of the housing 12 and the wind shield 131. The first air inlet 1310 is located on the side of the third accommodating chamber 102 away from the housing 12. The bell mouth portion 640 is located upstream of the third accommodating chamber 102. The expanded end 6400 of the bell mouth portion 640 is relatively far away from the third accommodating chamber 102, and the narrow end 6401 of the bell mouth portion 640 is relatively close to the third accommodating chamber 102. The sewage suction airflow flows through the expanded end 6400, the narrow end 6401, the first air inlet 1310 in sequence. The exhaust airflow is discharged from the fan device 6 through the second air outlet 641; the second air outlet 641 and the flared end 6400 are located at the bottom of the fan device 6, the first flexible sealing gasket 650 is arranged around the periphery of the flared end 6400, and the first flexible sealing gasket 650 is used for the sealing connection of the flared end 6400 to the outside; the second flexible sealing gasket 651 is arranged around the periphery of the second air outlet 641, and the second flexible sealing gasket 651 is used for the sealing connection of the second air outlet 641 to the outside; the first flexible sealing gasket 650 and the second flexible sealing gasket 651 are independent or connected as one. The flared end 6400 is inclined relative to the central axis A of the motor 1. The first flexible sealing gasket 650 and the second flexible sealing gasket 651 are respectively bonded and fixed to the bottom cover 64.

[0096] The first air outlet 14 is defined between the annular wall 180 and the housing 12. The second flexible sleeve 162 is sleeved on the wind shield 131. A portion of the second flexible sleeve 162 surrounds and abuts against the annular wall 180. The second flexible sleeve 162 also includes a second annular flange 1621, an annular protrusion 1622, and the plurality of ribs 1623. The second annular flange 1621 surrounds the central axis A of the motor 1. The second annular flange 1621 is arranged on the outer periphery of the portion of the second flexible sleeve 162. The annular protrusion 1622 surrounds the central axis A of the motor 1. The annular protrusion 1622 is located on the bottom side of the second flexible sleeve 162 and protrudes downward. The annular protrusion 1622 surrounds the second air inlet 1620, the plurality of ribs 1623 are sequentially distributed in the circumferential direction around the central axis A of the motor 1, and the plurality of ribs 1623 extend from the second annular flange 1621 to the annular protrusion 1622 respectively. The second cover shell 62 also includes a second rib 625, which is in a ring shape around the central axis A of the motor 1. The second rib 625 protrudes upward and abuts against the annular protrusion 1622 upward to enhance the sealing between the second cover shell 62 and the second flexible sleeve 162; the second rib 625 is in a closed loop, and the second rib 625 slightly penetrates the annular protrusion 1622 upward, and also plays a role in assisting the positioning of the annular protrusion 1622 to a certain extent.

[0097] The impeller 110 includes an impeller air inlet 1100 and an impeller air outlet 1101. The impeller 110 can rotate under the drive of the rotating shaft 50 to generate a polluted airflow. After the polluted airflow flows into the impeller 110 through the impeller air inlet 1100, it continues to flow downstream through the impeller air outlet 1101 to form the exhaust airflow. The polluted airflow flows through the flared end 6400, the narrow end 6401, the third air inlet 620, the second air inlet 1620, the first air inlet 1310 in sequence, and enters the impeller 110 through the impeller air inlet 1100;

[0098] The first flexible sleeve 160 is clamped between the motor 1 and the first cover shell 61, so that it can play a shock-absorbing role between the upper part of the motor 1 and the first cover shell 61. The first flexible sleeve 160 is located at the upper end of the exhaust chamber 60. The first flexible sleeve 160 prevents the gas in the exhaust chamber 60 from leaking upward out of the exhaust chamber 60; after the exhaust airflow flows out of the motor 1 through the first air outlet 14, it flows upward along the surface of the casing 12, and the exhaust airflow flows through the blowing heat dissipation part 34 to take away the heat of the blowing heat dissipation part 34. The exhaust airflow is blocked by the blowing heat dissipation part 34 and will turn. The exhaust airflow turns and gradually flows toward the at least one air outlet channel; the exhaust airflow flows through the at least one air outlet channel and the second air outlet 641, and is discharged from the fan device 6.

[0099] Figure 1 A cleaning device 7 is disclosed. The cleaning device 7 uses a fan device 6. The cleaning device 7 includes a body 70 and a floor brush assembly 71. The fan device 6 is a part of the body 70. The fan device 6 is located inside the body 70. The body 70 also includes a clean water container 700, a sewage container 701, and a filter. The floor brush assembly 71 is movably connected to the lower part of the body 70. The floor brush assembly 71 includes a sewage suction port 710 and a roller brush 711. The roller brush 711 is located at the sewage suction port 710. The impeller 110 is driven by the rotating shaft 50. The sewage suction airflow generated by the downward rotation flows through the sewage suction port 710, the sewage container 701, and the filter in sequence, and further flows through the flared end 6400, the narrow end 6401, the third air inlet 620, the second air inlet 1620, the first air inlet 1310, and then enters the impeller 110 through the impeller air inlet 1100. The dirt (sewage, solid garbage, etc.) sucked by the sewage suction airflow is collected in the sewage container 701. The filter is set on the cover of the sewage container 701, and the sewage suction airflow flows through the filter and is filtered clean.

Claims

1. A motor, characterized in that: The invention comprises a first accommodating chamber, a second accommodating chamber, a third accommodating chamber, a control board assembly, a heat-conducting bracket, a stator assembly, a rotor assembly and a moving impeller. The first accommodating chamber is located on the upper side of the heat-conducting bracket. The first accommodating chamber, the second accommodating chamber and the third accommodating chamber are sequentially distributed from top to bottom. The stator assembly comprises a stator core, a stator winding and an insulating frame. The stator winding is wound on the insulating frame. The control board assembly comprises a circuit board and a plurality of power devices. The circuit board is accommodated in the first accommodating chamber. The stator core and the stator winding are accommodated in the second accommodating chamber. The moving impeller is accommodated in the third accommodating chamber. The rotor assembly comprises a rotating shaft capable of driving the moving impeller to rotate. The plurality of power devices are arranged on the lower side of the circuit board facing the heat-conducting bracket. The plurality of power devices are heat-conductingly connected to the heat-conducting bracket. The vertical projection of the stator assembly at least partially overlaps with the vertical projection of the heat-conducting bracket.

2. The motor according to claim 1, characterized in that: It also includes an insulating heat-conducting material filling the gap between the heat-conducting bracket and the power device, the plurality of power devices are attached to the bottom surface of the circuit board facing the heat-conducting bracket, the heat-conducting bracket includes a plurality of first grooves corresponding to the plurality of power devices, the plurality of first grooves are recessed on the upper surface of the heat-conducting bracket, the power devices respectively at least partially enter the corresponding first grooves downward, and the insulating heat-conducting material fills the gap between the first groove and the corresponding power device; The power device is a MOS tube, which is welded to the bottom of the circuit board. The MOS tube is a patch-shaped component attached to the bottom of the circuit board. The insulating thermal conductive material completely covers the bottom of the MOS tube, and the vertical projection of each MOS tube is completely covered by the vertical projection of the thermal conductive bracket.

3. The motor according to claim 1, characterized in that: It also includes a casing, an upper cover, and a first air outlet. The vertical projection of the upper cover is completely within the range defined by the outer contour of the vertical projection of the heat-conducting bracket. The vertical projection of the stator assembly is completely within the range defined by the outer contour of the vertical projection of the heat-conducting bracket. The stator assembly also includes a plurality of piercing terminals, which are fixed on the insulating frame. The casing surrounds at least a part of the second accommodating cavity. The first air outlet is located on the periphery of the casing and is in a state of surrounding the central axis of the motor. The impeller rotates to drive the air flow to form an exhaust airflow, and the exhaust airflow is discharged from the motor through the first air outlet. The heat-conducting bracket covers the upper end of the casing, the heat-conducting bracket and the casing define a second accommodating cavity, and the heat-conducting bracket and the upper cover define a first accommodating cavity. The upper cover is locked to the casing or the heat-conducting bracket, and the heat-conducting bracket is locked to the casing. The upper cover or the heat-conducting bracket includes a plurality of first positioning protrusions, and the circuit board includes a plurality of first positioning notches corresponding to the plurality of first positioning protrusions, and the plurality of first positioning notches are located on the periphery of the circuit board.

4. The motor according to claim 3, characterized in that: The heat conducting bracket further comprises a plurality of first screws and a plurality of second screws, wherein the first locking protrusion is a part of the heat conducting bracket, and the first locking protrusion is formed with a plurality of first locking screw holes, and the plurality of first screws are correspondingly locked in the plurality of first locking screw holes to lock the upper cover to the heat conducting bracket; the housing is formed with a plurality of second locking screw holes, and the plurality of second locking screw holes are evenly distributed in the circumferential direction around the central axis of the motor, and the plurality of second screws are correspondingly locked in the plurality of second locking screw holes to lock the heat conducting bracket to the housing; The heat-conducting bracket is in the shape of a disk, and the heat-conducting bracket is perpendicular to the rotating shaft; The heat-conducting bracket separates the first accommodating cavity and the second accommodating cavity up and down, each piercing terminal passes through the heat-conducting bracket upward and extends into the first accommodating cavity and is welded to the circuit board, and each piercing terminal does not contact the heat-conducting bracket.

5. The motor according to claim 1, characterized in that: It also includes a positioning bracket and a casing. The positioning bracket is accommodated in a first accommodating cavity. The rotor assembly also includes a magnetic ring, an upper bearing, and a lower bearing. The upper bearing and the lower bearing are assembled on a rotating shaft. The rotating shaft passes through the upper bearing and the lower bearing. The positioning bracket includes a first bearing accommodating portion, a first support arm, a second support arm, and a third support arm. The first support arm, the second support arm, and the third support arm are sequentially distributed in a circumferential direction around the central axis of the motor. The first support arm, the second support arm, and the third support arm are directly supported on the stator core respectively; the casing also includes a second bearing accommodating portion, the upper bearing is installed in the first bearing accommodating portion, and the lower bearing is installed in the second bearing accommodating portion; the positioning bracket is made of metal, and the stator core and the rotor assembly are thermally connected to the heat-conducting bracket through the positioning bracket.

6. The motor according to claim 1, characterized in that: It also includes a casing and a first air outlet. The casing surrounds at least a part of the second accommodating cavity. The first air outlet is located on the periphery of the casing and is in a state of surrounding the central axis of the motor. The exhaust airflow formed by the air flow driven by the rotation of the impeller is discharged from the motor through the first air outlet. The thermal conductive bracket includes a blowing and heat dissipation part, which is exposed to the outside of the motor. The vertical projection of the blowing and heat dissipation part surrounds the central axis of the motor. The blowing and heat dissipation part is located above the first air outlet. The exhaust air flows upward through the first air outlet and can blow and dissipate the air on the blowing and heat dissipation part.

7. The motor according to claim 6, characterized in that: The air blowing heat dissipation part includes a plurality of heat dissipation fins, which are located outside the motor and on the bottom side of the air blowing heat dissipation part. The plurality of heat dissipation fins are arranged in a state surrounding the central axis of the motor. The plurality of heat dissipation fins are distributed in sequence in the circumferential direction surrounding the central axis of the motor. The plurality of heat dissipation fins are distributed radially on the periphery of the motor. There is a radial gap between each heat dissipation fin and the casing. Each radial gap is distributed in sequence in the circumferential direction surrounding the central axis of the motor, and a part of the exhaust air flow flows through the radial gap.

8. The motor according to claim 7, characterized in that: The housing comprises an annular upper end portion and an upper port surrounded by the annular upper end portion, the heat-conducting bracket covers the upper port, a sealing ring is sandwiched between the heat-conducting bracket and the annular upper end portion to achieve a sealed connection between the heat-conducting bracket and the housing; the annular upper end portion comprises a second annular groove corresponding to the sealing ring, the sealing ring is placed in the second annular groove, the sealing ring and the second annular groove respectively surround the central axis of the motor, and the plurality of heat dissipation fins are located radially outside the annular upper end portion; The annular upper end portion includes a first annular flange, which surrounds the central axis of the motor and protrudes radially outward at the outer periphery of the casing. The plurality of heat dissipation fins are distributed on the periphery of the first annular flange, and the heat dissipation fins extend downward beyond the first annular flange. There is a radial gap between each heat dissipation fin and the first annular flange, and the radial gap extends upward from the corresponding radial interval.

9. The motor according to claim 6, characterized in that: The air-blowing heat dissipation part is located at the periphery of the upper end of the casing, and the periphery of the air-blowing heat dissipation part exposed to the upper end of the casing is in a circular ring shape. The vertical projection of the air-blowing heat dissipation part surrounds the vertical projection of the casing, and the vertical projection of the air-blowing heat dissipation part partially overlaps with the vertical projection of the first air outlet. The part where the vertical projection of the air-blowing heat dissipation part overlaps with the vertical projection of the first air outlet surrounds the central axis of the motor, and the exhaust air flow is blown upward to the air-blowing heat dissipation part through the first air outlet, thereby blowing and cooling the air-blowing heat dissipation part; the motor also includes an upper cover and a first flexible sleeve, and the heat-conducting bracket and the upper cover define a first accommodating cavity; the first flexible sleeve is arranged on the upper cover; The heat-conducting bracket also includes a first annular protrusion and a first annular groove, the first annular protrusion and the first annular groove are arranged on a side of the air-blowing and heat-dissipating part facing away from the first air outlet, the first annular protrusion protrudes upward, the first annular protrusion surrounds the periphery of the first annular groove, and the first annular groove is recessed downward; the first flexible sleeve includes an annular sealing portion, the annular sealing portion includes an annular sealing flange and an annular lower end edge, the annular sealing flange is radially protruding outward on the outer periphery of the first flexible sleeve, the annular lower end edge protrudes downward relative to the annular sealing flange, the first annular protrusion, the first annular groove, the annular sealing flange, and the annular lower end edge respectively surround the central axis of the motor, the annular sealing flange is downwardly attached to the first annular protrusion, and the annular lower end edge is downwardly embedded in the first annular groove; The annular sealing flange extends radially outward beyond the first annular protrusion, and the vertical projection of the heat-conducting bracket is completely within the range defined by the outer peripheral contour of the vertical projection of the annular sealing flange; the heat-conducting bracket also includes a second annular protrusion, which is located on the upper side of the heat-conducting bracket, the first annular protrusion and the second annular protrusion respectively protrude upward from the air-blowing heat dissipation part, the second annular protrusion surrounds the central axis of the motor, the interval between the first annular protrusion and the second annular protrusion constitutes a first annular groove, the upper cover is locked to the heat-conducting bracket, and the lower end of the upper cover is downwardly abutted against the second annular protrusion.

10. The motor according to claim 1, characterized in that: It also includes an upper cover, a housing, and a positioning bracket. The upper cover is made of plastic material. The heat-conducting bracket and the upper cover define a first accommodating cavity. The housing is made of plastic material. The heat-conducting bracket and the housing define a second accommodating cavity. The heat-conducting bracket is made of metal, the casing includes an annular upper end portion and an upper port surrounded by the annular upper end portion, the heat-conducting bracket is made of metal, and the heat-conducting bracket covers the upper port; the stator assembly also includes a plurality of puncture terminals; the insulating frame is installed on the stator core, the insulating frame is insulated and isolated between the stator core and the stator winding, the rotor assembly passes through the central area of ​​the stator core and the insulating frame from top to bottom, the insulating frame includes an upper frame and a lower frame, the stator winding includes a first winding, a second winding, and a third winding, the first winding, the second winding, and the third winding are respectively formed by winding a single enameled wire, the upper frame and the lower frame together form a first winding portion, a second winding portion, and a third winding portion, the first winding portion, the second winding portion, and the third winding portion are surrounded by the center of the motor. The motor is evenly distributed in the circumferential direction of the axis, the first winding is wound on the first winding part, the second winding is wound on the second winding part, and the third winding is wound on the third winding part; the plurality of piercing terminals include a first piercing terminal, a second piercing terminal, and a third piercing terminal, the vertical projections of the stator core and the upper skeleton are completely located within the range circled by the outer peripheral contour of the vertical projection of the heat-conducting bracket, the upper skeleton includes a first part, a second part, and a third part, the first part, the second part, and the third part are respectively upwardly facing the heat-conducting bracket, and the first part, the second part, and the third part are evenly distributed in the circumferential direction around the central axis of the motor; the positioning bracket includes a first support arm, a second support arm, and a third support arm, the first support arm, the second support arm, and the third support arm extend to the stator core respectively, and the first support arm, the second support arm, and the third support arm extend to the stator core respectively. The first part, the second support arm, the second part, the third support arm, and the third part are distributed in sequence in the circumferential direction around the central axis of the motor; the first part and the third support arm are located on opposite sides of the rotating shaft in radial direction, the second part and the first support arm are located on opposite sides of the rotating shaft in radial direction, and the third part and the second support arm are located on opposite sides of the rotating shaft in radial direction; the first part is formed with a first slot for the first piercing terminal to be plugged in, the second part is formed with a second slot for the second piercing terminal to be plugged in, and the third part is formed with a third slot for the third piercing terminal to be plugged in; the first slot, the second slot, and the third slot are respectively in a state of opening upward facing the heat-conducting bracket; the first winding includes a first left lead wire and a first right lead wire, the second winding includes a second left lead wire and a second right lead wire, and the third winding includes a third left lead wire. The lead wire, the third right lead wire, the first left lead wire and the first right lead wire constitute the lead wires at opposite ends of the first winding, the second left lead wire and the second right lead wire constitute the lead wires at opposite ends of the second winding, the third left lead wire and the third right lead wire constitute the lead wires at opposite ends of the third winding, the first right lead wire and the second left lead wire are directly connected to the first piercing terminal respectively; the second right lead wire and the third left lead wire are directly connected to the second piercing terminal respectively; the third right lead wire and the first left lead wire are directly connected to the third piercing terminal respectively; the upper skeleton also includes a circular ring portion, which surrounds the central axis of the motor, and the circular ring portion sequentially connects the first winding portion, the first portion, the second winding portion, the second portion, the third winding portion, and the third portion along the circumferential direction surrounding the central axis of the motor.

11. A fan device, characterized in that: It comprises a motor, a fan housing, and an exhaust chamber according to any one of claims 1 to 10, wherein the motor is located in the fan housing, the exhaust chamber is formed between the fan housing and the motor, and the exhaust air flow is discharged from the motor into the exhaust chamber.

12. The fan device according to claim 11, characterized in that: The fan housing comprises a first housing, a second housing, and a third flexible sealing gasket sandwiched between the first housing and the second housing, the third flexible sealing gasket surrounds the periphery of the motor, the first housing is located above the second housing, and the third flexible sealing gasket is sandwiched between the lower end of the first housing and the upper end of the second housing; The motor also includes a hood and a second flexible sleeve, the hood surrounds at least a part of the third accommodating chamber, the hood includes a first air inlet, the second flexible sleeve includes a second air inlet, the hood covers the impeller, the second flexible sleeve is covered on the hood, the first air inlet constitutes the air inlet of the third accommodating chamber, and the first air inlet is located between the second air inlet and the third accommodating chamber; the fan housing also includes a third air inlet, and the second air inlet is located between the third air inlet and the first air inlet; the first air inlet, the second air inlet, and the third air inlet are sequentially superimposed together; the impeller can rotate under the drive of the rotating shaft to generate a polluted airflow, and the polluted airflow continues to flow downstream after flowing to the impeller to form an exhaust airflow, and the polluted airflow is used to absorb stolen goods, and the polluted airflow flows through the third air inlet, the second air inlet, and the first air inlet in sequence; The fan housing also includes a bell mouth portion, which is located below the motor, the flared end of the bell mouth portion is relatively far away from the motor, the narrow end of the bell mouth portion is relatively close to the motor, the narrow end, the third air inlet, the second air inlet, and the first air inlet are sequentially stacked together from bottom to top, and the sewage suction airflow flows through the flared end, the narrow end, the third air inlet, the second air inlet, and the first air inlet in sequence; The fan cover also includes a second air outlet and at least one air outlet channel, and the exhaust air flow is discharged from the fan device via the second air outlet; the at least one air outlet channel fluid is connected to the exhaust chamber, and after the exhaust air flow is discharged from the motor, it flows through the exhaust chamber, the at least one air outlet channel, and the second air outlet in sequence, thereby being discharged from the fan device; the at least one air outlet channel includes a first air outlet channel and a second air outlet channel, and the first air outlet channel and the second air outlet channel are located on the left and right sides of the bell-mouth portion.

13. The fan device according to claim 12, characterized in that: The first air outlet channel and the second air outlet channel extend downward respectively; the fan housing also includes a bottom cover, the bell mouth portion is a part of the bottom cover, the third air inlet is opened in the second housing, the second housing also includes a first support portion and a second support portion, the first support portion and the second support portion are located on the left and right sides of the bell mouth portion, the first support portion and the second support portion extend downward respectively, the first support portion is hollow to form a first air outlet channel therein, and the second support portion is hollow to form a second air outlet channel therein; the second air outlet is opened in the bottom cover, and the second air outlet and the flared end are located at the bottom of the fan device; The second housing further includes a first inclined wall and a second inclined wall, the first inclined wall and the second inclined wall are located at the bottom of the exhaust chamber, and the first inclined wall extends obliquely downward toward the first air outlet channel to guide the airflow to flow toward the first air outlet channel; The second inclined wall extends obliquely downward toward the second air outlet channel to guide the airflow to flow toward the second air outlet channel.

14. The fan device according to claim 11, characterized in that: The hood also includes a bell-shaped portion and a second air outlet, wherein the bell-shaped portion is located below the motor; the motor also includes a hood, which covers the impeller, and the hood surrounds at least a portion of the third accommodating chamber; the hood includes a first air inlet, and the impeller can rotate under the drive of the rotating shaft to generate a polluted airflow, and the polluted airflow continues to flow downstream after flowing to the impeller to form an exhaust airflow, and the polluted airflow is used to absorb stolen goods, the bell-shaped portion is located upstream of the third accommodating chamber, the expanded end of the bell-shaped portion is relatively far away from the third accommodating chamber, and the narrow end of the bell-shaped portion is relatively close to the third accommodating chamber, the polluted airflow flows through the expanded end, the narrow end, and the first air inlet in sequence, and the exhaust airflow is discharged from the fan device through the second air outlet; the second air outlet and the expanded end are located at the bottom of the fan device; The fan device also includes at least one air outlet channel, and the fluid of the at least one air outlet channel is connected to the exhaust chamber. The at least one air outlet channel includes a first air outlet channel and a second air outlet channel. The first air outlet channel and the second air outlet channel are located on the left and right sides of the bell-mouth portion. A part of the exhaust air flow flows through the exhaust chamber, the first air outlet channel, and the second air outlet in sequence, and another part of the exhaust air flow flows through the exhaust chamber, the second air outlet channel, and the second air outlet in sequence.

15. The fan device according to claim 11, characterized in that: The motor also includes an annular wall, a wind cover, and a second flexible sleeve. The wind cover covers the impeller, and the second flexible sleeve is covered on the wind cover. A part of the second flexible sleeve surrounds and abuts against the annular wall. The second flexible sleeve also includes a second annular flange, an annular protrusion, a plurality of ribs, and a second air inlet. The second annular flange surrounds the central axis of the motor. The second annular flange is arranged on the outer periphery of the said part of the second flexible sleeve. The annular protrusion surrounds the central axis of the motor. The annular protrusion is located on the bottom side of the second flexible sleeve and protrudes downward. The annular protrusion surrounds the second air inlet, and the plurality of ribs extend from the second annular flange to the annular protrusion respectively. The fan cover also includes a first cover and a second cover. The second cover includes a second rib. The second rib is in a ring shape surrounding the central axis of the motor. The second rib protrudes upward and abuts against the annular protrusion upward.

16. A cleaning device, characterized in that: The invention comprises a motor according to any one of claims 1 to 10 or a fan device according to any one of claims 11 to 15.

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