CN114810639A

CN114810639A - Fan and floor cleaning machine

Info

Publication number: CN114810639A
Application number: CN202210618592.8A
Authority: CN
Inventors: 王小伟; 乔正忠; 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: 2022-07-29

Abstract

The invention discloses a fan and a floor washing machine with the fan, wherein the fan comprises a shell assembly, a stator assembly and a rotor assembly, the shell assembly comprises a shell and a machine shell, the shell is sleeved on the machine shell, an air outlet channel is formed between the shell and the machine shell, the stator assembly is arranged in the machine shell, the rotor assembly is rotationally connected with the stator assembly, and a rotating shaft of the rotor assembly is fixedly connected with an impeller.

Description

Fan and floor scrubber

Technical Field

The invention relates to the technical field of household appliances, in particular to a fan and a floor washing machine.

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.

In the related art, a rotor assembly of the fan drives the impeller to rotate, a large vacuum degree is formed at an inlet of the fan housing, and airflow is sucked into the inlet of the fan housing. The floor cleaning machine needs great suction, and the rotational speed requirement to the fan is higher, and the stator module that leads to the fan gives out heat great to the floor cleaning machine application 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 the leakproofness of fan, stator module's heat can't in time spill, can lead to the fan to overheat and damage, so the fan has certain improvement space.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the fan which can enhance the heat dissipation effect.

The invention also provides a floor washing machine with the fan.

According to the fan of the embodiment of the first aspect of the invention, the fan comprises:

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 rotor assembly is fixedly connected with an impeller;

the heat dissipation device comprises a stator assembly, a casing, a heat dissipation rib and a heat dissipation plate, wherein the heat dissipation rib is arranged in the casing and is abutted against the stator assembly so as to conduct heat of the stator assembly to the casing.

The fan according to the embodiment of the first aspect of the invention has at least the following advantages: the pivot of rotor subassembly drives the impeller and rotates, the impeller air-suction flow, 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, and simultaneously, heat dissipation muscle and stator module butt, the heat conduction to the casing of stator module can be with the heat dissipation muscle, because the air-out passageway is by forming between casing and the shell, the surface of casing can be flowed through to the air current in the air-out passageway, take away the heat of casing, thereby reach the effect of reinforcing radiating effect.

According to some embodiments of the invention, the heat dissipation rib is provided in plurality, and the plurality of heat dissipation ribs are arranged at intervals along the circumferential direction of the casing.

According to some embodiments of the invention, guide ribs are provided in the casing for guiding the stator assembly into the casing.

According to some embodiments of the invention, the guide rib is provided in plurality, and the plurality of guide ribs are arranged at intervals along the circumferential direction of the casing.

According to some embodiments of the invention, the heat dissipation ribs are provided in plurality, the guide ribs are provided in plurality, and the heat dissipation ribs and the guide ribs are arranged alternately and at intervals along the circumferential direction of the casing.

According to some embodiments of the invention, the stator assembly is an interference fit with the plurality of guide ribs.

According to some embodiments of the invention, the matching surface of the stator assembly and the guide rib is an arc surface, the interference X between the stator assembly and the guide rib is equal to half of the difference between the outer diameter D of the stator assembly and the diameter K1 of a reference circle formed by a plurality of arc surfaces, and X is greater than or equal to 0.005mm and less than or equal to 0.5 mm.

According to some embodiments of the invention, the casing includes an annular inner wall, the heat dissipation rib is disposed on the annular inner wall, and the sum of the arc length L of the heat dissipation rib and the height H of the heat dissipation rib is less than or equal to the inner diameter K2 of the annular inner wall.

According to some embodiments of the invention, a ratio of an outer diameter D of the stator assembly to a number N of slots of the stator assembly is greater than or equal to 1.25 and less than or equal to 20.

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

According to some embodiments of the present invention, 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.

A floor washing machine according to an embodiment of the second aspect of the invention comprises the fan of the embodiment of the first aspect.

The floor washing machine provided by the embodiment of the invention at least has the following beneficial effects: be applied to the fan of first aspect embodiment, the pivot of rotor subassembly drives the impeller and rotates, the impeller air-suction flow, the air current is flowed out by the air-out side of impeller, the air current obtains kinetic energy, the air current can get into in the air-out passageway, and simultaneously, heat dissipation muscle and stator module butt, the heat conduction to casing of stator module can be with the heat dissipation muscle, because the air-out passageway is by forming between casing and the shell, the surface of casing can be flowed through to the air current in the air-out passageway, take away the heat of casing, thereby reach the effect of reinforcing 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 cross-sectional view of a wind turbine in accordance with an embodiment of a first aspect of the present invention;

FIG. 2 is a schematic structural diagram of a chassis according to some embodiments of the invention;

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

FIG. 4 is a top view of a chassis according to some embodiments of the invention;

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

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

FIG. 7 is a schematic structural diagram of a chassis according to some embodiments of the invention;

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

FIG. 9 is a schematic structural view of a wind turbine 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 of the number of fins in a fan versus the winding temperature equalization in accordance with 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;

a fan cover 600, an air inlet 610 and an 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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the 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, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

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 fans set 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 on the casing.

Based on this, referring to fig. 1, a wind turbine 1000 according to an embodiment of the first aspect 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 housing assembly includes a housing 100 and a casing 200, where the housing 100 is of an annular structure, a cavity is formed inside the housing 100, both ends of the housing 100 in an axial direction are open, the casing 200 is of a substantially cylindrical structure, the casing 200 is installed in the cavity of the housing 100, one end of the casing 200 extends into the cavity of the housing 100, the housing 100 is sleeved on the casing 200, the housing 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 housing 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 housing 600 and an end cover 700, the fan housing 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 housing 600 and an outer circumferential wall of the casing 100 to form a sealing 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 direction muscle 210 and stator module 300 also can be irregularly shaped, can be through the area of the fitting surface of increase direction muscle 210 and stator module 300 to guarantee that stator module 300 is inseparable with the cooperation of direction muscle 210 after impressing, simultaneously, can also increase the heat conduction area of direction muscle 210 and stator module 300, and reinforcing radiating effect.

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-described embodiments, the embodiments of the present invention define: 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 uniform, and the pressing force applied to the stator assembly 300 is 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 can 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 heat dissipation role for stator assembly 300, and when heat dissipation rib 220 is in interference fit with stator assembly 300, the magnitude of interference between heat dissipation rib 220 and stator assembly 300 can be set to be smaller than the magnitude of interference between guide rib 210 and stator assembly 300, so that heat dissipation rib 220 plays a heat dissipation role and also plays an auxiliary positioning assembly role for 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, and as illustrated with reference to fig. 3 and 5, based on 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 satisfying above-mentioned condition, can reach better radiating effect under stator module 300's the less condition of interference push-in force, and do not influence stator module 300 and casing 200 assembly, if L + H is greater than K2, can make the packing force of stator module 300 that heat dissipation muscle 220 and is too big, when the pressure equipment, needs great interference push-in force, is unfavorable for stator module 300's assembly.

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 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 section casing 270 and a second section casing 280 arranged in a vertical direction, the first section casing 270 is located below the second section casing 280, an outer diameter of the second section casing 280 is smaller than that of the first section casing 270, and the air outlet channel 110 is located between the second section 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 air flow 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 air flow may take away more heat, and meanwhile, the air flow 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 the right angle transition face and connect first section casing 270 and second section casing 280, the air current can receive very big resistance for the air-out passageway 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, 7 and 8, it can be understood that a fin 240 is disposed on an outer peripheral wall of the casing 200, the fin 240 and the casing 200 are integrally formed, the fin 240 is a protruding sheet structure, the fin 240 can be disposed at an outlet of the air outlet channel 110, a structure of 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 sufficiently exchange heat with the fin 240, and the air flow can also sufficiently exchange heat 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 beveled edge 241 may also extend in an arcuate direction.

The thickness of the fins 240 has a certain influence on the resistance of the airflow in the air outlet channel 110, and according to a large amount of experimental data, the embodiment of the present invention defines: 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 fins 240 of the present embodiment is uniform, and the thickness of each position of the fins 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.

For the above embodiment, the number of the fins 240 and the number of the diffuser blades 510 are matched to achieve a better heat dissipation effect, and according to practical experience, the embodiment of the present invention defines: 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 fins 240 and the diffuser blades 510 have less resistance to the airflow, the effect of extending the airflow passing 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 to the airflow of the fins 240 and the diffuser blades 510 is large, the ventilation of the air outlet channel 110 is poor, and the air suction performance of the fan 1000 is poor.

For the above-mentioned embodiment, further, in the embodiment of the present invention, it is defined 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 graph of a relationship between a winding temperature equalization and a fin number when the number N of the diffuser blades 510 is 8, a vertical axis is the winding temperature equalization, a horizontal axis is the number of the fins 240, a winding temperature equalization parameter of the vertical axis is a temperature of the winding 320, when a number parameter of the fins 240 in the horizontal axis changes, a temperature equalization of the winding 320 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, and 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 PPS material or PBT material, the PPS material is polyphenylene sulfide material, and the impeller is novel high-performance thermoplastic resin, and can improve the structural strength and the high temperature resistance of the impeller. The PBT material is 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 floor scrubber of the second aspect of the present invention, the floor scrubber includes the blower 1000 of the above embodiment, so that the floor scrubber can achieve the technical effects of the above embodiment, and further description is omitted 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 within the knowledge of those skilled in the art without departing from the gist of the present invention.

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 heat dissipation ribs are provided, and the plurality of heat dissipation ribs are arranged at intervals along a circumferential direction of the housing.

3. The fan of claim 1, wherein a guide rib is disposed in the housing, the guide rib being configured to guide the stator assembly into the housing.

4. The fan of claim 3, wherein the plurality of guide ribs are provided, and the plurality of guide ribs are provided at intervals along a circumferential direction of the housing.

5. The fan as claimed in claim 3, wherein the heat dissipating ribs are provided in plurality, the guiding ribs are provided in plurality, and the heat dissipating ribs and the guiding ribs are alternately arranged at intervals in a circumferential direction of the housing.

6. The fan of claim 4, wherein the stator assembly is an interference fit with the plurality of guide ribs.

7. The fan according to claim 6, wherein the fitting surface of the stator assembly and the guide rib is an arc surface, an interference X between the stator assembly and the guide rib is equal to a half of a difference between an outer diameter D of the stator assembly and a diameter K1 of a reference circle formed by the arc surfaces, and X is greater than or equal to 0.005mm and less than or equal to 0.5 mm.

8. The fan according to claim 1, wherein the housing includes an annular inner wall, the heat dissipating ribs are disposed on the annular inner wall, and a sum of an arc length L of the heat dissipating ribs and a height H of the heat dissipating ribs is less than or equal to an inner diameter K2 of the annular inner wall.

9. The fan of claim 1, wherein a ratio of an outer diameter D of the stator assembly to a number N of slots of the stator assembly is greater than or equal to 1.25 and less than or equal to 20.

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

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.