CN217354846U

CN217354846U - Fan and floor cleaning machine

Info

Publication number: CN217354846U
Application number: CN202221378695.3U
Authority: CN
Inventors: 乔正忠; 王小伟; 王喜; 方佳旗; 熊美健
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-09-02
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a fan, still disclose the scrubber that has the fan, the fan includes housing assembly, stator module and rotor subassembly, housing assembly includes shell and casing, the casing is located to the shell cover, form the air-out passageway between shell and the casing, stator module installs in the casing, the rotor subassembly rotates with stator module to be connected, the pivot fixedly connected with impeller of rotor subassembly, wherein, the outer wall of casing is equipped with the fin, at least part fin is located the air-out passageway, the fin has the resistance to the air current in the air-out passageway, can prolong the air current through the time of fin, make the fin prolong with the heat exchange time of air current, the air current can absorb more heats, strengthen the radiating effect.

Description

Fan and floor cleaning machine

Technical Field

The utility model relates to the technical field of household appliances, in particular to fan and scrubber.

Background

The floor cleaning machine is cleaning equipment integrating sweeping, mopping and cleaning, and can be applied to dry environments and wet environments to clean dry and wet garbage.

Among the correlation technique, the scrubber has certain requirement to the performance of induced drafting, and the suction of scrubber is provided by the fan, requires the rotational speed of fan higher, and the stator module that leads to the fan gives out heat great to scrubber application still has certain waterproof nature requirement to the fan in dry environment and wet environment, requires that the leakproofness of the structure of fan is better, and under the better condition of leakproofness of fan, stator module's heat can't in time spill, leads to the radiating effect of fan relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a fan can strengthen the radiating effect.

The utility model discloses still provide the floor cleaning machine that has above-mentioned fan.

According to the utility model discloses a fan of first aspect embodiment, include:

the shell assembly comprises a shell and a machine shell, the shell is sleeved on the machine shell, and an air outlet channel is formed between the shell and the machine shell;

a stator assembly mounted in the casing;

the rotor assembly is rotationally connected with the stator assembly, and a rotating shaft of the stator assembly is fixedly connected with an impeller;

the outer wall of the casing is provided with fins, and at least part of the fins are located in the air outlet channel.

According to the utility model discloses fan of the first aspect embodiment has following beneficial effect at least: the pivot of rotor subassembly drives the impeller and rotates, the impeller inhales the air current, the air current is flowed by the air-out side of impeller, the air current obtains kinetic energy, the air current can get into in the air-out passageway, the heat conduction that stator module produced to the casing, the heat conduction to the fin of casing, because the fin of part is located the air-out passageway, the air current in the air-out passageway can pass through the fin, the fin has the drag effect to the air current in the air-out passageway, can prolong the air current through the time of fin, make the air current increase with the heat exchange time of fin, the air current in the air-out passageway can be utilized effectively, absorb more heats, thereby strengthen the radiating effect.

According to some embodiments of the utility model, the fin is equipped with a plurality ofly, a plurality of the fin is followed the circumference setting of casing.

According to some embodiments of the utility model, the edge of fin extremely the distance of shell, along the orientation the direction crescent of the air inlet end of air-out passageway.

According to the utility model discloses a some embodiments, the fan includes the diffuser, the diffuser install in the casing, the diffuser is equipped with a plurality of diffusion blades, adjacent two form the diffusion passageway between the diffusion blade, the diffusion passageway is located the impeller with between the air-out passageway.

According to some embodiments of the present invention, the number M of fins is 3 or more, and 17 or less, the number N of diffuser blades is 4 or more, and 10 or less.

According to some embodiments of the present invention, the maximum thickness W of the fin is greater than or equal to 0.2mm, and less than or equal to 5 mm.

According to some embodiments of the present invention, part of the casing is recessed inward to form an arc-shaped curved surface, and the arc-shaped curved surface is used for guiding the airflow in the air outlet channel to flow along the surface of the casing.

According to the utility model discloses a some embodiments, the fin is located arc curved surface department.

According to some embodiments of the invention, the housing is made of an aluminum alloy material.

According to some embodiments of the invention, the surface of the housing is treated by at least one of electroplating, anodizing, and passivating.

According to the utility model discloses a some embodiments, the fan includes the fan housing, the fan housing connect in housing assembly, the fan housing cover is located the impeller, the air intake has been seted up to the fan housing.

According to the utility model discloses a floor scrubber of second aspect embodiment, including the fan of first aspect embodiment.

According to the utility model discloses floor cleaning machine has following beneficial effect at least: be applied to the fan of first aspect embodiment, the pivot of rotor subassembly drives the impeller and rotates, the impeller inhales the air current, the air current is flowed by the air-out side of impeller, the air current obtains kinetic energy, the air current can get into in the air-out passageway, the heat conduction that stator module produced to the casing, the heat conduction to the fin of casing, because partial fin is located the air-out passageway, the air current in the air-out passageway can pass through the fin, the fin has the resistance to the air current in the air-out passageway, can prolong the air current and pass through the time of fin, make the air current increase with the heat exchange time of fin, the air current in the air-out passageway can be utilized effectively, absorb more heat, thereby reinforcing the radiating effect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is a sectional view of a fan according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a housing according to some embodiments of the present invention;

FIG. 3 is an enlarged view at A shown in FIG. 2;

fig. 4 is a top view of a housing according to some embodiments of the present invention;

FIG. 5 is an enlarged view at B shown in FIG. 4;

fig. 6 is a schematic structural view of a stator assembly according to some embodiments of the present invention;

fig. 7 is a schematic structural diagram of a housing according to some embodiments of the present invention;

FIG. 8 is an enlarged view at C shown in FIG. 7;

fig. 9 is a schematic structural view of a fan according to some embodiments of the present invention;

fig. 10 is a schematic structural view of a housing according to some embodiments of the present invention;

fig. 11 is a graph showing the relationship between the number of fins and the winding temperature equalization in the fan according to some embodiments of the present invention.

Reference numerals:

a fan 1000;

a housing 100, an air outlet channel 110;

the fan comprises a machine shell 200, a guide rib 210, an arc-shaped surface 211, a heat dissipation rib 220, an arc-shaped curved surface 230, a first section of curved surface 231, a second section of curved surface 232, a fin 240, a bevel edge 241, a ventilation groove 250, an annular inner wall 260, a first section of shell 270 and a second section of shell 280;

stator assembly 300, stator core 310, windings 320;

rotor assembly 400, rotating shaft 410, impeller 411;

diffuser 500, diffuser vanes 510;

the fan cover 600, the air inlet 610 and the impeller cavity 620;

an end cap 700;

a circuit board 800.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

The floor cleaning machine is cleaning equipment integrating sweeping, mopping and cleaning, and can be applied to dry environments and wet environments to clean dry and wet garbage. The floor washing machine comprises an air suction fan and a rolling brush fan, wherein the air suction fan is used for driving an impeller to rotate so as to generate suction, and the rolling brush fan is used for driving a rolling brush to rotate so as to wipe the ground.

In the related art, a scrubber is generally provided with a fan cover to protect the scrubber, and for a fan for sucking air, a rotor assembly of the fan drives an impeller to rotate, so that a large vacuum degree is formed at an inlet of the fan cover, and air flow is sucked from the inlet of the fan cover. The scrubber needs great suction, the rotational speed requirement to the fan is higher, under the great condition of rotational speed, the stator module calorific capacity of fan is great, and the scrubber application is in dry environment and wet environment, there is certain waterproof nature requirement to the fan, the leakproofness of the structure of requirement fan is better, for example, the inside that the air current of fan inspiration is difficult to get into the fan, the air current of fan inspiration is difficult to flow through stator module and dispels the heat to it promptly, under the better condition of leakproofness of fan, stator module's heat is piled up inside the casing, can't in time spill, can lead to the fan overheated and damage, at present, there is certain improvement space in the fan of scrubber.

It should be explained that stator module usually includes stator core and winding, and stator core is the tube-shape, and both ends are open, and the winding is convoluteed in stator core, and the winding is protruding to stator core's axial both ends usually, thereby the main effect of winding is conduction current and produces induced electromotive force to realize electromechanical energy's conversion, and in the operation of fan, the current passes through the winding, and the winding can produce the heat, because stator module installs in the inside of casing, and the inside leakproofness of casing is better, and the heat dissipation condition of casing inside is relatively poor.

In the correlation technique, if stator module is direct to be connected with the internal perisporium interference of casing, because stator module is great with the internal perisporium area of contact of casing, need very big interference push-in force when pressure equipment stator module, present pressure equipment is difficult to satisfy so big interference push-in force demand to, after the pressure equipment, stator module also is difficult to be dismantled. At present, most fan sets up the stator installation department in the casing usually, and stator module passes through bolted connection with the stator installation department, and the inner wall contact of stator module and casing is inseparable, leads to stator module's heat to be difficult to conduct to the casing on.

Based on this, referring to fig. 1, a wind turbine 1000 according to an embodiment of the present invention includes a housing assembly, a stator assembly 300, and a rotor assembly 400.

Referring to fig. 1, 2, 9 and 10, in particular, the casing assembly includes a casing 100 and a casing 200, the casing 100 is of an annular structure, a cavity is formed inside the casing 100, both ends of the casing 100 in an axial direction are open, the casing 200 is of a substantially cylindrical structure, the casing 200 is mounted in the cavity of the casing 100, one end of the casing 200 extends into the cavity of the casing 100, the casing 100 is sleeved on the casing 200, the casing 100 is located outside the casing 200 and surrounds the casing 200, an air outlet channel 110 is defined between an inner peripheral wall of the casing 100 and an outer peripheral wall of the casing 200, and the air outlet channel 110 is of an annular shape. It should be noted that, a part of the casing 200 is located in the wind outlet channel 110, a part of the casing 200 is located outside the wind outlet channel 110, and the airflow in the wind outlet channel 110 may flow along the surface of the casing 200.

More specifically, the casing 200 has a mounting cavity therein, the stator assembly 300 is mounted in the mounting cavity of the casing 200, a stator mounting portion may be provided in the mounting cavity of the casing 200, the stator assembly 300 and the stator mounting portion are connected by a bolt, or the stator assembly 300 and the mounting cavity of the casing 200 are fixed by an adhesive. The rotor assembly 400 is rotatably connected to the stator assembly 300, and specifically, a rotating shaft 410 of the rotor assembly 400 is located in the stator core 310 of the stator assembly 300, a gap is formed between the rotating shaft 410 and the stator core 310, and the rotating shaft 410 can rotate relative to the stator core 310. The rotating shaft 410 is arranged along the axial direction of the casing 200, the end of the rotating shaft 410 extends out of the bottom of the casing 200, meanwhile, the end of the rotating shaft 410 also extends out of the bottom of the casing 100, the end of the rotating shaft 410 is fixedly connected with the impeller 411, the rotating shaft 410 can drive the impeller 411 to rotate, and the impeller 411 is located below the air outlet channel 110.

In order to achieve better sealing performance, the fan 1000 further includes a fan cover 600 and an end cover 700, the fan cover 600 is mounted at the bottom of the casing 100, and a sealing ring may be disposed between an inner circumferential wall of the fan cover 600 and an outer circumferential wall of the casing 100 to form a sealed connection. An impeller cavity 620 is formed in the fan housing 600, the impeller cavity 620 is communicated with the air outlet channel 110, the impeller 411 is located in the impeller cavity 620, the fan housing 600 is covered on the impeller 411, and an air inlet 610 is formed in the bottom of the fan housing 600. The end cap 700 is installed on the top of the casing 200, and the end cap 700 covers the installation cavity of the casing 200 to ensure good sealing performance.

Referring to fig. 2 and 3, a heat dissipation rib 220 is disposed in the casing 200, specifically, the casing 200 includes an annular inner wall 260, the annular inner wall 260 may be formed by an inner peripheral wall of the casing 200, the heat dissipation rib 220 is disposed on the annular inner wall 260, the heat dissipation rib 220 is located between the casing 200 and the stator assembly 300, the heat dissipation rib 220 abuts against the stator assembly 300, the heat dissipation rib 220 is attached to an outer wall of the stator assembly 300, the heat dissipation rib 220 is arc-shaped with a matching surface of the stator assembly 300, so that the heat dissipation rib 220 can conduct heat of the stator assembly 300 to the casing 200, it can be understood that the heat dissipation rib 220 may be integrally formed with the casing 200, and the manufacturing is convenient.

When the fan 1000 works, the rotor assembly 400 drives the impeller 411 to rotate, the impeller 411 sucks air flow, a large vacuum degree is formed at the air inlet 610 of the fan housing 600, the air flow is sucked into the air inlet 610 of the fan housing 600, the air flow flows out from the air outlet side of the impeller 411 and is extruded to obtain large kinetic energy, so that the air flow enters the air outlet channel 110, meanwhile, the heat of the stator assembly 300 is conducted to the machine shell 200 by the heat dissipation ribs 220, the air flow in the air outlet channel 110 can flow through the surface of the machine shell 200, the heat of the machine shell 200 is taken away, under the condition that the sealing performance of the fan 1000 is good, the heat dissipation effect of the fan 1000 is enhanced, and the condition that the heat of the stator assembly 300 is accumulated and cannot be dissipated timely is relieved.

It can be understood that the fitting surface of the heat dissipation rib 220 and the stator assembly 300 can also be irregular, and the area of the fitting surface of the heat dissipation rib 220 and the stator assembly 300 can be increased, so that the heat conduction area of the heat dissipation rib 220 and the stator assembly 300 is increased, and the heat dissipation rib 220 can conduct more heat, thereby further enhancing the heat conduction effect of the heat dissipation rib 220.

Referring to fig. 2 and 4, it can be understood that the heat dissipation ribs 220 may be provided in plurality, the plurality of heat dissipation ribs 220 are disposed at intervals along the circumferential direction of the casing 200, and the plurality of heat dissipation ribs 220 are disposed at intervals along the circumferential direction of the stator assembly 300, so as to increase the contact area with the stator assembly 300, thereby enhancing the heat conduction effect of the heat dissipation ribs 220, for example, the number of the heat dissipation ribs 220 is 3, the 3 heat dissipation ribs 220 are disposed at intervals of 120 degrees, the heat conduction is uniform, and the heat conduction effect is good.

Referring to fig. 1 to 4, it can be understood that a guide rib 210 is disposed in the casing 200, specifically, the guide rib 210 is disposed on an annular inner wall 260 of the casing 200, the guide rib 210 is a convex structure, and the guide rib 210 can guide the stator assembly 300 to be installed in the casing 200. Specifically, stator module 300 and direction muscle 210 interference fit, the fitting surface of direction muscle 210 and stator module 300 is arcwall face 211, and stator module 300 compresses tightly direction muscle 210, and stator module 300 can closely laminate with direction muscle 210 for direction muscle 210 can be with the heat conduction of stator module 300 production to the outer wall of casing 200, reinforcing radiating effect. It is understood that the guide rib 210 may be integrally formed with the set cover 200 for easy manufacturing.

It can be understood that the fitting surface of the guiding rib 210 and the stator assembly 300 can also be irregular, and the area of the fitting surface of the guiding rib 210 and the stator assembly 300 can be increased, so as to ensure that the stator assembly 300 is tightly fitted with the guiding rib 210 after being pressed in, and meanwhile, the heat conducting area of the guiding rib 210 and the stator assembly 300 can also be increased, and the heat dissipation effect is enhanced.

Referring to fig. 3 and 4, it can be understood that a plurality of guide ribs 210 may be provided, and a plurality of guide ribs 210 are spaced apart from each other along the circumferential direction of the casing 200, for example, 3 guide ribs 210 are spaced apart from each other by 120 degrees. The contact area between the stator assembly 300 and the guide ribs 210 can be increased by arranging the guide ribs 210, so that the heat conduction effect of the guide ribs 210 is enhanced, more heat is taken away, and meanwhile, the pressing-in angle of the stator assembly 300 can be fixed, so that the subsequent assembly of the stator assembly 300 and the end cover 700 is facilitated. A plurality of direction muscle 210 also can be along casing 200's circumference equidistance interval setting, for example, direction muscle 210 can set up 3, 3 a direction muscle 210 mutual interval 120 degrees settings, under the firm circumstances of assurance stator module 300 and the cooperation of direction muscle 210, the radiating effect preferred. It can be understood that, when the guide rib 210 is provided in plurality, the arc-shaped surface 211 of the guide rib 210 is also provided in plurality, the arc-shaped surfaces 211 are arranged at intervals in the circumferential direction of the housing 200, and a reference circle is formed between the arc-shaped surfaces 211, and has a diameter and a length.

Referring to fig. 3, 5 and 6, for the above-described embodiments, based on a large amount of experimental data, embodiments of the present invention define: the interference X between the stator assembly 300 and the guide rib 210 is equal to half of the difference between the outer diameter D of the stator assembly 300 and the diameter K1 of the reference circle formed by the arc-shaped surfaces 211, X is greater than or equal to 0.005mm and is less than or equal to 0.5mm, and the diameter K1 of the reference circle is determined by the thickness of the guide rib 210. When the above conditions are satisfied, the pressing force between the stator assembly 300 and the guide rib 210 is moderate, and the assembling tightness and the heat conduction performance of the stator assembly 300 and the guide rib 210 can be considered. If X is less than 0.005mm, the pressing force between the stator assembly 300 and the guide rib 210 is too low, the stator assembly 300 is easily loosened, and the fitting between the stator assembly 300 and the guide rib 210 is not tight enough, so that the heat conduction effect is poor. If X is greater than 0.5mm, the pressing force between the stator assembly 300 and the guide rib 210 is too large, and during press-fitting, the interference pressing force required by the stator assembly 300 is too large, which is not favorable for assembly, and the pressing force between the stator assembly 300 and the guide rib 210 is too large, which may damage the structures of the stator assembly 300 and the guide rib 210.

Further, for the above-mentioned embodiment, the embodiment of the present invention defines: the interference press-in force F of the stator assembly 300 is not more than 6000N. When the above conditions are met, when the stator assembly 300 is press-fitted, the pressing force between the stator assembly 300 and the guide rib 210 is low, the damage to the structure is reduced, and if the interference pressing force F is greater than 6000N, the stator assembly 300 and the guide rib 210 are seriously damaged, for example, the guide rib 210 has defects such as cracks.

Referring to fig. 2 and 4, it can be understood that a plurality of heat dissipation ribs 220 and guide ribs 210 may be provided, and the heat dissipation ribs 220 and the guide ribs 210 are spaced and alternately arranged along the circumferential direction of the casing 200, so that the heat conduction of the stator assembly 300 is more uniform, and the pressing force applied to the stator assembly 300 is also more balanced. For example, the number of the guide ribs 210 and the number of the heat dissipation ribs 220 are 3, 3 of the guide ribs 210 are spaced at 120 degrees along the circumferential direction of the chassis 200, 3 of the heat dissipation ribs 220 are also spaced at 120 degrees along the circumferential direction of the chassis 200, and the heat dissipation ribs 220 are located between two of the guide ribs 210.

It can be understood that heat dissipation rib 220 may be in transition fit with stator assembly 300, for example, when heat dissipation rib 220 is in clearance fit with stator assembly 300, heat dissipation rib 220 plays a role in heat dissipation to stator assembly 300, when heat dissipation rib 220 is in interference fit with stator assembly 300, the interference between heat dissipation rib 220 and stator assembly 300 may be set to be smaller than the interference between guide rib 210 and stator assembly 300, so that heat dissipation rib 220 plays a role in heat dissipation and may play a role in auxiliary positioning assembly to stator assembly 300.

In the case that the heat dissipation rib 220 is in interference fit with the stator assembly 300, if the area of the mating surface of the heat dissipation rib 220 and the stator assembly 300 is too large, the stator assembly 300 requires a large interference press-in force, which may affect the assembly of the stator assembly 300 in the casing 200. Based on this, referring to fig. 3 and 5, according to a large amount of experimental data, embodiments of the present invention define: the sum of the arc length L of the heat dissipation ribs 220 and the height H of the heat dissipation ribs 220 is less than or equal to the inner diameter K2 of the annular inner wall 260. It should be noted that the inner diameter of the annular inner wall 260 of the present embodiment is constant in a range along the axial direction, and the inner diameter K2 of the annular inner wall 260 does not consider the thickness of the heat dissipating ribs 220. When the above conditions are met, a good heat dissipation effect can be achieved under the condition that the interference press-in force of the stator assembly 300 is small, and the assembly of the stator assembly 300 and the casing 200 is not affected, if L + H is larger than K2, the pressing force of the heat dissipation rib 220 and the stator assembly 300 is too large, and during press-fitting, a large interference press-in force is needed, which is not beneficial to the assembly of the stator assembly 300.

Stator slots are formed in a stator core 310 of the stator assembly 300 and used for winding the windings 320, the number of the stator slots is equal to the number of the windings 320, the number of the stator slots 300 is the number of the stator slots, the working performance of the fan 1000 is related to the number of the stator assemblies 300, and under different working conditions, the fan 1000 needs to meet different working performances. Based on this, embodiments of the present invention define: the ratio of the outer diameter D of the stator assembly 300 to the number N of slots of the stator assembly 300 is greater than or equal to 1.25, and the ratio of the outer diameter D of the stator assembly 300 to the number N of slots of the stator assembly 300 is less than or equal to 20. The ratio of the outer diameter D of the stator assembly 300 to the number N of slots of the stator assembly 300 is the outer diameter D of the stator assembly 300 divided by the number N of slots of the stator assembly 300, where the outer diameter D of the stator assembly 300 is the numerator and the number N of slots of the stator assembly 300 is the denominator. When the above conditions are satisfied, the fan 1000 can be widely applied to most environments, and has strong applicability.

Referring to fig. 1 and 7, it can be understood that the casing 200 includes a first stage casing 270 and a second stage casing 280 arranged in a vertical direction, the first stage casing 270 is located below the second stage casing 280, an outer diameter of the second stage casing 280 is smaller than that of the first stage casing 270, and the air outlet channel 110 is located between the second stage casing 280 and the outer casing 100. The outer peripheral wall of part of the casing 200 is recessed inwards to form an arc-shaped curved surface 230, so that the casing 200 is located in the area of the arc-shaped curved surface 230, the outer diameter of the casing 200 is gradually reduced along the direction towards the bottom of the casing 200, the arc-shaped curved surface 230 connects the first section of casing 270 and the second section of casing 280, so that the transition from the first section of casing 270 to the second section of casing 280 is smooth, the wall thickness of the casing 200 is uniform, during production and manufacturing, the defect caused by stress concentration can be reduced in the embodiment, meanwhile, the area of the arc-shaped curved surface 230 is large, and the heat conduction effect of the casing 200 can be enhanced.

To the scheme that the periphery wall of casing 200 set up along vertical direction, the flow direction of the air current of air-out passageway 110 is parallel with the direction that sets up of the periphery wall of casing 200, and the windward side area of casing 200 periphery wall is less, and the heat that the air current can be taken away is less, and the radiating effect is relatively poor. In this embodiment, the airflow in the air outlet duct 110 may collide with the arc-shaped curved surface 230, the arc-shaped curved surface 230 may increase the windward area of the casing 200, and the airflow may take away more heat, and meanwhile, the airflow flows along the arc-shaped curved surface 230, and the resistance is small, thereby ensuring that the ventilation of the air outlet duct 110 is good, and considering the heat dissipation performance and the air suction performance of the fan 1000.

Referring to fig. 1, specifically, the arc-shaped curved surface 230 includes a first section curved surface 231 and a second section curved surface 232, the inward concave degree of the second section curved surface 232 is greater than the inward concave degree of the first section curved surface 231, the first section curved surface 231 is connected to the first section housing 270, the first section curved surface 231 is located above the air outlet channel 110, the first section curved surface 231 is connected to the second section curved surface 232, the second section curved surface 232 is connected to the second section housing 280, and a part of the second section curved surface 232 is located in the air outlet channel 110. To the scheme that sets up right angle transition face and connect first section casing 270 and second section casing 280, the air current can receive very big resistance for air outlet channel 110's air permeability is relatively poor, thereby fan 1000's the performance of induced drafting receives the influence. The first section curved surface 231 and the second section curved surface 232 of the present embodiment can guide the airflow in the air outlet channel 110 to flow, the airflow in the air outlet channel 110 flows along the surfaces of the first section housing 270, the first section curved surface 231, the second section curved surface 232, and the second section housing 280 in sequence, the airflow flows smoothly, the resistance to the airflow can be reduced, and the air suction performance of the fan 1000 is better.

It can be understood that, for the above-described embodiment, the position of the guide rib 210 corresponds to the arc-shaped curved surface 230 of the casing 200, and the guide rib 210 directly conducts the heat of the stator assembly 300 to the arc-shaped curved surface 230, so that the distance of heat conduction can be reduced, the heat conduction is faster, and the heat dissipation effect can be further enhanced.

Referring to fig. 1, fig. 7 and fig. 8, it can be understood that a fin 240 is disposed on an outer circumferential wall of the casing 200, the fin 240 and the casing 200 are integrally formed, the fin 240 is of a raised sheet structure, the fin 240 can be disposed at an outlet of the air outlet channel 110, a portion of the fin 240 can extend into the air outlet channel 110, an extending direction of the fin 240 can be the same as a flowing direction of an air flow in the air outlet channel 110, the fin 240 can extend in a vertical direction, the fin 240 has a resistance effect on the air flow, and can slow down a flowing speed of the air flow, so that a time of the air flow passing through the fin 240 can be prolonged, so that the air flow can be sufficiently heat-exchanged with the fin 240, and the air flow can also be sufficiently heat-exchanged with the casing 200, and further sufficiently utilize the air flow in the air outlet channel 110 to take away heat of the casing 200, so as to enhance a heat dissipation effect. In addition, since the fins 240 are connected to the chassis 200, the chassis 200 can also conduct heat to the fins 240, and since the fins 240 are sheet-shaped, the heat conducting area can be increased, and the heat dissipation effect on the chassis 200 is better.

Referring to fig. 1, it can be understood that the distance from the edge of the fin 240 to the outer casing 100 gradually increases along the direction toward the air inlet end of the air outlet channel 110, when the outer casing 100 is a rotating body, the distance from the edge of the fin 240 to the outer casing 100 can be understood as the distance from the edge of the fin 240 to the generatrix of the outer casing 100, so that the edge of the fin 240 forms a bevel 241, and the bevel 241 extends along a straight direction, so that the area of the fin 240 is smaller, so that the resistance of the fin 240 to the airflow in the air outlet channel 110 is properly reduced, the ventilation of the air outlet channel 110 can be good, and the air suction performance of the fan 1000 can be ensured. It will be appreciated that the bevel edge 241 may also extend in an arc direction.

The thickness of fin 240 has certain influence to the resistance of the air current in air-out passageway 110, according to a large amount of experimental data, the embodiment of the utility model provides a inject: the maximum thickness W of the fin 240 is 0.2mm or more, and the maximum thickness W of the fin 240 is 5mm or less. It should be noted that the thickness of the fin 240 of the present embodiment is uniform, and the thickness of each position of the fin 240 is the same. When the above conditions are satisfied, the resistance of the fins 240 to the air flow in the air outlet channel 110 is moderate, so that the air ventilation of the air outlet channel 110 is good, the effect of prolonging the time of the air flow passing through the fins 240 is also good, and the fins 240 can give consideration to both the air suction performance and the heat dissipation performance of the fan 1000. If the maximum thickness W of the fin 240 is less than 0.2mm, the fin 240 has less resistance to the airflow of the air outlet channel 110, and the effect of prolonging the time of the airflow passing through the fin 240 is poor. If the maximum thickness W of the fin 240 is greater than 5mm, the fin 240 has a relatively large resistance to the airflow of the air outlet channel 110, which is not favorable for ventilation of the air outlet channel 110 and may affect the air suction performance of the fan 1000.

Referring to fig. 1 and 7, it can be understood that the fins 240 are disposed at the arc-shaped curved surface 230, the fins 240 are connected to the arc-shaped curved surface 230, the fins 240 may be disposed in plural, the fins 240 are disposed along the circumferential direction of the arc-shaped curved surface 230, the arc-shaped curved surface 230 may guide the airflow to flow along the arc-shaped curved surface 230, so as to reduce resistance to the airflow, the fins 240 may sufficiently utilize the airflow to achieve heat exchange, and take away heat of the housing, and the fins 240 and the arc-shaped curved surface 230 are combined, so as to ensure that heat dissipation is enhanced under the condition that the flowability of the airflow is good, and meanwhile, both air suction performance and heat dissipation performance are considered.

Referring to fig. 1 and 7, for the above-described embodiment, it can be understood that the positions of the stator assembly 300, the arc-shaped curved surface 230, and the fins 240 are correspondingly arranged, so that the distance between the stator assembly 300, the arc-shaped curved surface 230, and the fins 240 is smaller, the distance for heat transfer can be reduced, the heat conduction is faster, the heat of the stator assembly 300 can be faster conducted to the outside of the casing 200, the air flow of the air outlet channel 110 carries away the heat, and the heat dissipation effect can be further enhanced.

Referring to fig. 1 and 7, it can be understood that a plurality of fins 240 are provided, the plurality of fins 240 are disposed at intervals along the outer peripheral wall of the casing 200, the plurality of fins 240 may also be disposed at intervals along the outer peripheral wall of the casing 200, the plurality of fins 240 may increase resistance of the fins 240 to the air flow of the air outlet channel 110, and further extend time for the air flow of the air outlet channel 110 to pass through the fins 240, so as to achieve a sufficient heat exchange effect, and the plurality of fins 240 may increase a heat conducting area, so that the casing 200 may conduct more heat to the fins 240, thereby further enhancing a heat dissipation effect.

Referring to fig. 1 and 10, it can be understood that a diffuser 500 is disposed between the impeller 411 and the air outlet channel 110, the diffuser 500 is mounted at the bottom of the casing 200, the diffuser 500 is located in the cavity of the casing 100, the diffuser 500 can convert kinetic energy of the air flow into air pressure energy, and reduce the flow velocity of the air flow to increase the pressure, specifically, the diffuser 500 includes a plurality of diffuser blades 510, the diffuser blades 510 are disposed in an inclined manner, the diffuser blades 510 are disposed at intervals along the circumferential direction of the casing 100, the diffuser blades 510 are located in an annular region at the bottom of the casing 100, a diffuser channel is formed between two adjacent diffuser blades 510, the air flow flows out from the air outlet side of the impeller 411, obtains kinetic energy, and then enters the diffuser channel, and the diffuser channel converts the kinetic energy of the air flow into air pressure energy, thereby achieving deceleration and pressurization of the air flow.

To the above-mentioned embodiment, the quantity of fin 240 and the quantity cooperation of diffuser blade 510 can reach better radiating effect, according to actual experience, the embodiment of the utility model provides an inject: the number M of the fins 240 is equal to or greater than 3, the number M of the fins 240 is equal to or less than 17, the number N of the diffuser blades 510 is equal to or greater than 4, and the number N of the diffuser blades 510 is equal to or less than 10. When the above conditions are satisfied, the air flow in the air outlet channel 110 has good fluidity and a good heat dissipation effect, and the heat dissipation performance and the air suction performance of the fan 1000 can be considered at the same time. If the number of the fins 240 is less than 3 and the number N of the diffuser blades 510 is less than 4, the resistance of the fins 240 and the diffuser blades 510 to the airflow is small, the effect of extending the airflow through the fins 240 is poor, and the heat exchange time between the airflow and the fins 240 is short, so that the heat dissipation effect is poor, if the number of the fins 240 is greater than 17 and the number N of the diffuser blades 510 is greater than 10, the resistance of the fins 240 and the diffuser blades 510 to the airflow is large, the ventilation of the air outlet channel 110 is poor, and the air suction performance of the fan 1000 is poor.

To the above-mentioned embodiment, further, the embodiment of the present invention defines that the number N of the diffuser blades 510 is 8, the number M of the fins 240 is 13, referring to fig. 11, fig. 11 is a relationship diagram between the winding temperature equalization and the number of fins when the number N of the diffuser blades 510 is 8, the vertical axis is the winding temperature equalization, the horizontal axis is the number of the fins 240, the winding temperature equalization parameter of the vertical axis is the temperature of the winding 320, when the number parameter of the fins 240 in the horizontal axis changes, the winding temperature equalization also changes, when the number of the fins 240 is 13 or 15, the winding temperature equalization is the lowest, in order to save cost, when the number N of the diffuser blades 510 is 8, the number of the fins 240 is 13, at this time, the heat dissipation effect is better, and the cost is lower.

Because the inside of the casing 200 is relatively sealed and the ventilation performance is relatively poor, based on this, as shown in fig. 2 and fig. 4, it can be understood that the ventilation slots 250 are formed in the casing 200, the ventilation slots 250 are formed by removing materials, the ventilation slots 250 may be provided in plural numbers, and the plural ventilation slots 250 are arranged along the circumferential direction of the casing 200, for example, 3 ventilation slots 250 are arranged at intervals of 120 degrees. The ventilation grooves 250 may increase an interstitial space to enhance the fluidity of the air flow inside the cabinet 200, and the air flow may take away heat inside the cabinet 200, thereby enhancing a heat dissipation effect.

It can be understood that the casing 200 is cast from an aluminum alloy material by a casting process, and the aluminum alloy has the characteristics of low density, high strength, strong corrosion resistance and large heat conductivity coefficient, so that the casing 200 has the advantages of large structural strength, low weight, good heat dissipation performance and the like.

Since the blower 1000 has a certain requirement for waterproofness, the surface of the cabinet 200 is required to have a certain waterproofness and corrosion resistance. Based on this, it can be understood that, with the above-mentioned embodiment, the surface of the chassis 200 is subjected to at least one of electroplating, anodizing and passivation processes, and a protective film is formed on the surface of the chassis 200, so that the corrosion resistance can be enhanced, the occurrence of defects on the surface of the chassis 200 can be reduced, and the surface gloss of the chassis 200 can be improved, which is more beautiful. In addition, the thickness of the protective film is very low, the heat conduction influence on the chassis 200 is low, and the heat dissipation performance of the chassis 200 is not influenced.

It can be understood that the impeller is made of a PPS material or a PBT material, and the PPS material is a polyphenylene sulfide material, is a novel high-performance thermoplastic resin, and can improve the structural strength and the high temperature resistance of the impeller. The PBT material is a polybutylene terephthalate material, is a thermoplastic engineering polymer, and can enhance the mechanical strength and high temperature resistance of the impeller. In addition, a glass fiber material can be added into the PPS material or the PBT material, so that the structural strength and the high temperature resistance of the impeller can be further enhanced.

Referring to fig. 1, it can be appreciated that the blower 1000 further includes a circuit substrate 800, the circuit substrate 800 is located at the top of the chassis 200, the circuit substrate 800 is located in the end cap 700, and the circuit substrate 800 has leads connected to external power lines.

According to the utility model discloses floor scrubber of second aspect embodiment, including the fan 1000 of above-mentioned embodiment, consequently, floor scrubber can reach the technological effect of above-mentioned embodiment, no longer gives unnecessary details here.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. Fan, its characterized in that includes:

a stator assembly mounted in the casing;

2. The fan of claim 1, wherein the plurality of fins are disposed along a circumferential direction of the housing.

3. The fan of claim 1, wherein the distance from the edge of the fin to the housing increases in a direction toward the air inlet end of the air outlet channel.

4. The fan as claimed in claim 1, wherein the fan includes a diffuser, the diffuser is mounted on the casing, the diffuser has a plurality of diffuser blades, a diffuser passage is formed between two adjacent diffuser blades, and the diffuser passage is located between the impeller and the outlet passage.

5. The fan according to claim 4, wherein the number M of the fins is equal to or greater than 3 and equal to or less than 17, and the number N of the diffuser blades is equal to or greater than 4 and equal to or less than 10.

6. The fan of claim 1 wherein the maximum thickness W of the fins is greater than or equal to 0.2mm and less than or equal to 5 mm.

7. The fan of claim 1, wherein a portion of the housing is recessed inwardly to form an arcuate surface for directing airflow within the outlet channel along a surface of the housing.

8. The fan of claim 7, wherein the fins are disposed at the arcuate surface.

9. The fan of claim 1 wherein the enclosure is made of an aluminum alloy material.

10. The wind turbine of claim 1, wherein the surface of the housing is treated with at least one of a plating, anodizing, and passivation process.

11. The fan as claimed in claim 1, wherein the fan includes a fan housing, the fan housing is connected to the casing assembly, the fan housing is disposed on the impeller, and the fan housing is provided with an air inlet.

12. Floor washing machine, characterized in that it comprises a fan according to any of claims 1 to 11.