CN106704223B

CN106704223B - Gardening collects fallen leaves axial-flow fan special

Info

Publication number: CN106704223B
Application number: CN201611109931.0A
Authority: CN
Inventors: 卢璐娇
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-06
Filing date: 2016-12-06
Publication date: 2019-05-10
Anticipated expiration: 2036-12-06
Also published as: CN106704223A

Abstract

The invention discloses a kind of gardening to collect fallen leaves axial-flow fan special, comprising: car body；It is obliquely installed shell on the car body；Second Room, changeover portion and the first Room formed from one end of shell to the other end；Multiple air inlet holes are evenly distributed in a ring on the end face of the other end of the shell；Motor and wind wheel are co-axially located in second Room；Wind guide ring, it is an annular plate, and the radial direction of the wind guide ring is arc-shaped, and the opening of arc is towards first Room, the big ring end of the wind guide ring is fixed on the side wall of the other end of the shell, the small ring end of wind guide ring is extended to the tail end of the motor, and the radical length of the wind guide ring is less than the 1/6 of the cross-sectional diameter of the second Room, filtering cabin.The present invention, which can be realized, quickly collects fallen leaves, reduces labor intensity, and in use, synchronize heat dissipation to the motor of axial flow blower in real time, extend the service life of axial flow blower.

Description

Gardening collects fallen leaves axial-flow fan special

Technical field

The present invention relates to a kind of gardening to collect fallen leaves axial-flow fan special.

Background technique

In the prior art, it falls leaves through being purged frequently with axial flow blower, still, for the convenience of operation, it is often necessary to people Portable blower carries out fallen leaves collection and purging, use are very inconvenient.In addition, existing axial flow blower generally comprises wind wheel and electricity The middle part interference fit of machine, wind wheel is press-fitted on the outer rotor of motor, and the rotation of the outer rotor of motor drives wind wheel rotation, gas by Fan blade in wind wheel is agitated axially movable, so that axial outlet air, hurts sb.'s feelings when wind wheel rotates in order to prevent, be typically provided mesh enclosure Wind wheel is enclose, prevents people from removing the fan blade on contact wind wheel.Motor on axial flow blower is arranged on the air inlet duct of axial flow blower, and The cross-sectional diameter of wheel hub of cross-sectional diameter and wind wheel of motor is suitable, and the wind on air duct is caused to lead to substantially via around motor It crosses, and to the not no good heat dissipation effect of motor, directly affect duration and the service life of the first use of axial flow blower.

Summary of the invention

It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.

It is a still further object of the present invention to provide a kind of gardening to collect fallen leaves axial-flow fan special, can be realized quick receipts Collection cleans fallen leaves, reduces labor intensity, the waste of human resources is reduced, also, in use, in real time to axial flow blower Motor synchronizes heat dissipation, guarantees that motor remains at nominal situation temperature, extends the service life of axial flow blower.

In order to realize these purposes and other advantages according to the present invention, a kind of gardening collection fallen leaves special axis stream is provided Blower, comprising:

Car body comprising sweep is a " u "-shaped plate body；Wheel body, rolling are arranged on the lower end surface of the sweep； First support plate and the second support plate, are parallel to each other and are vertically arranged on the sweep；First semicircle is incised and the second half Circle is incised, and the middle part of the upper end of first support plate and second support plate is separately positioned on；First support The ratio of the height of plate and second support plate is 1:2；First support plate is opened close to the " u "-shaped plate body of the sweep It is arranged at mouthful；

Shell, has the tube structure of air outlet for one end, be formed in the shell cross-sectional diameter it is not equal the One Room and second Room, first Room are arranged close to one end of the shell, the other end of the second Room close to the shell Setting, the embedded setting of the opening direction of one end towards the " u "-shaped plate body of the shell are incised and the in the first semicircle In two semicircles are incised, and the air outlet of the shell extends to the opening of the " u "-shaped plate body；First Room and described The length ratio of second Room is 2~5:1, the maximum cross-sectional diameter of the second Room and the cross-sectional diameter of first Room Ratio is 6-8:5；The shell further includes changeover portion, is arranged between first Room and the second Room, in shell In axial direction, the changeover portion is arc, and the part shell of the part shell of the changeover portion and first Room Joining place be extended to second Room bending, and annular groove is formed in changeover portion, and the shell of the changeover portion It supports on the opening edge edge that lateral wall is incised with second semicircle；Multiple air inlet holes are evenly distributed on the shell in a ring On the end face of the other end of body；

Motor, is arranged in the second Room middle part, and the output shaft of the motor is extended on the axis of the shell To on direction, setting in the middle part of the end face of the other end of shell described in the tail end face of the motor；

Wind wheel is set on the outer rotor of the motor, and the close described of the second Room is arranged in the wind wheel At changeover portion, it is from the other end of the shell to the air duct of one end of the shell that wind direction is formed in the wind wheel；It is described Wind wheel includes the first wind wheel and the second wind wheel of coaxial arrangement, and first wind wheel is arranged close to the changeover portion, and described the The fan blade outer rim of one wind wheel is rotatable to be buckled into the annular groove；Second wind wheel setting is in first wind wheel and described Between motor, and the ratio of the diameter of the diameter of first wind wheel and second wind wheel is 2-3:1；

Wind guide ring, is an annular plate, and the wind guide ring radial direction is arc-shaped and axial direction to shell Direction bending, and the opening of arc, towards first Room, the big ring end of the wind guide ring is fixed at close to the shell On the side wall of the other end of body, the small ring end of the wind guide ring is extended to the tail end of the motor, and the wind is oriented to The radical length of ring is less than the 1/6 of the cross-sectional diameter of the second Room；

Filtering cabin is the cylinder of a both ends open, and one end of the filtering cabin be located in the other end of the shell End face on, the multiple air inlet hole be located in the filtering cabin；Filter screen is provided on the other end of the filtering cabin.

Preferably, the end face of the other end of the shell is provided projectingly towards outside camber, the multiple air inlet hole Setting is on arcuate projection point.

Preferably, further include a pair of of handle, from second support plate to the car body on the outside of extend in parallel and set It sets.

Preferably, the specification of the multiple air inlet hole is 5*20mm.

Preferably, the opening width of the annular groove is less than the 1/6 of first Room cross-sectional diameter.

Preferably, the angle in the maximum cross section of the fan blade and first Room is 35-45 degree.

Preferably, further includes: fixed link, one end of which is fixed on the inner sidewall of the shell, the other end is fixed on institute It states on motor；Cover is located on the air outlet of the shell；The output shaft of support column, one end from the motor runs through The center of the wind wheel extends to one end of the shell and is fixed on the inner sidewall of the cover.

Preferably, the fixed link is sheet bar, and plane where sheet bar is parallel with the vertical section of the shell.

Preferably, the cross-sectional diameter of the support column is less than 3cm.

Preferably, the fan blade further includes air-intake side edge and air side edge, the air side edge of the fan blade to Wind direction, which is extended, in the air duct wind deflector, and one end of the wind deflector is extended to apart from hub periphery 2- At 3cm, the other end of the wind deflector extends to the outer peripheral edge of fan blade but is not embedded in the annular groove, and the wind is oriented to Plate is gradually reduced from its middle part to both ends width, and the width of the wind deflector is 1-4cm.

The present invention is include at least the following beneficial effects:

Car body is used to support shell, and to complete the purpose using blower purging fallen leaves, " u "-shaped opening is shell on sweep One end provides the space of accommodating, so that air outlet is as far as possible close to ground, purging fallen leaves are more thorough；First Room for assemble motor and Wind wheel；Second Room is for guiding wind direction；Changeover portion is formed simultaneously annular groove for being connected the first Room and second Room, and wind wheel It is embedded in annular groove, facilitates in wind wheel rotary course for periphery, recycle the wind leaked out from wind wheel external source；Therefore, first Interior has essentially formed two transportation work styles, and the first transportation work style is to flow through wind from the middle part of wind wheel after entering the first Room from multiple air inlet holes Behind road, shell is blown out；Second transportation work style is that the windbreak leaked out outward from wind wheel outer peripheral edge returns to the first interior, later and to the wind Guide ring be concentrated to after making wind direction be changed to former wind direction again close to wind wheel middle part and the first transportation work style converge after blow out shell；? Second transportation work style power is formed as the wind that circles round at the first indoor close inner sidewall, can be through motor tail portion aweather on the path for the wind that circles round Direction blowout is taken turns, facilitates to carry out automatic synchronization heat dissipation to motor in this way, later, after the second transportation work style can also be turned to by the second wind wheel Converge blowout shell with the first transportation work style, the second transportation work style is recycled, therefore, will not be caused into the intracorporal wind-force of shell Waste, while improving the wind-force in the middle part of wind wheel on air duct.In addition, being led to the specification ratio setting and wind of the first Room and second Room Restriction to ring radical length with respect to the cross-sectional diameter of second Room ensure that the first transportation work style and the second transportation work style can not be mutually Interference, and can complete to guarantee the synchronization radiating treatment to motor while ventilation air-supply, guarantee that fan operation is steady, extends The service life of blower.

Shown in sum up, the present invention, which can be realized quickly to collect, cleans fallen leaves, reduces labor intensity, reduces the wave of human resources Take, also, in use, heat dissipation is synchronized to the motor of axial flow blower in real time, guarantees that motor remains at normally Working temperature extends the service life of axial flow blower.

Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.

Detailed description of the invention

Fig. 1 is the schematic diagram of the section structure of the vertical profile of one embodiment of the invention；

Fig. 2 is the positive structure diagram of the car body of one embodiment of the invention；

Fig. 3 is the positive structure diagram of the end face of the other end of the shell of one embodiment of the invention；

Fig. 4 is the schematic diagram of the section structure of the vertical profile of another embodiment of the present invention；

Fig. 5 is the positive structure diagram of the first wind wheel described in another embodiment of the present invention.

Specific embodiment

Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text Word can be implemented accordingly.

It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more The presence or addition of a other elements or combinations thereof.

As depicted in figs. 1 and 2, the present invention provides a kind of gardening collection fallen leaves axial-flow fan special, comprising:

Car body comprising sweep 500 is a " u "-shaped plate body；Wheel body 501 rolls the lower end that the sweep is arranged in On face；First support plate 502 and the second support plate 503, are parallel to each other and are vertically arranged on the sweep；First is semicircle scarce Quarter 504 and the second semicircle incise 405, are separately positioned in the upper end of first support plate and second support plate Portion；The ratio of the height of first support plate and second support plate is 1:2；First support plate is close to the sweep " u "-shaped plate body opening setting；A pair of of handle, from second support plate to the car body on the outside of extend in parallel and set It sets；Shell 100 has the tube structure of air outlet for one end, and cross-sectional diameter does not wait first is formed in the shell Room 101 and second Room 102, first Room are arranged close to one end of the shell, and the second Room is another close to the shell One end setting, the embedded setting of the opening direction of one end towards the " u "-shaped plate body of the shell are incised in the first semicircle In incising with the second semicircle, and the air outlet of the shell extends to the opening of the " u "-shaped plate body；First Room and The length ratio of the second Room is 2~5:1, and the maximum cross-sectional diameter of first Room and the cross section of the second Room are straight The ratio of diameter is 6-8:5；The shell further includes changeover portion 103, is arranged between first Room and the second Room, In the axial direction of shell, the changeover portion is arc, and the part institute of the part shell of the changeover portion and first Room The joining place for stating shell is extended to second Room bending, and annular groove is formed in changeover portion, and the changeover portion It supports on the opening edge edge that the lateral wall of shell is incised with second semicircle；Multiple air inlet holes 104, are uniformly distributed in a ring On the end face 105 of the other end of the shell；Middle part, the output of the motor is arranged in the second Room in motor 200 Axis is extended on the axial direction of the shell, in the middle part of the end face of the other end of shell described in the tail end face of the motor Setting；Wind wheel is set on the outer rotor of the motor, and the close transition of the second Room is arranged in the wind wheel At section, it is from the other end of the shell to the air duct of one end of the shell that wind direction is formed in the wind wheel；The wind wheel The first wind wheel 300 and the second wind wheel 301 including coaxial arrangement, first wind wheel are arranged close to the changeover portion, and described The fan blade outer rim 304 of first wind wheel is rotatable to be buckled into the annular groove；Second wind wheel is arranged in first wind wheel Between the motor, and the ratio of the diameter of the diameter of first wind wheel and second wind wheel is 2-3:1；Wind guide ring 106, it is an annular plate, and the radial direction of the wind guide ring is arc-shaped and be bent to the axial direction of shell, and arc For the opening of shape towards first Room, the big ring end of the wind guide ring is fixed at the side of the other end close to the shell On wall, the small ring end of the wind guide ring is extended to the tail end of the motor, and the radical length of the wind guide ring is small In the 1/6 of the cross-sectional diameter of the second Room；Filtering cabin 600 is the cylinder of a both ends open, and the one of the filtering cabin On the end face for holding the other end that be located in the shell, the multiple air inlet hole be located in the filtering cabin；The filtering cabin The other end on be provided with filter screen 601.

In the present solution, car body is used to support shell, to complete the purpose using blower purging fallen leaves, " u "-shaped on sweep Opening provides the space of accommodating for one end of shell, so that air outlet is as far as possible close to ground, purging fallen leaves are more thorough, and do not need Manual support axial flow blower operation, it is convenient and practical；Second Room is for assembling motor and wind wheel；First Room is for guiding wind direction；It crosses Cross section for be connected the first Room and second Room, be formed simultaneously annular groove, and wind wheel is that periphery is embedded in annular groove, is facilitated In wind wheel rotary course, the wind leaked out from wind wheel external source is recycled；Therefore, two transportation work styles, the first via have been essentially formed in second Room Wind is the blowout shell after entering second Room from multiple air inlet holes from after flowing through air duct in the middle part of wind wheel；Second transportation work style is certainly The windbreak leaked out outward on wind wheel outer peripheral edge returns in second Room, and guide ring makes wind direction be changed to former wind again later and to the wind It is concentrated to after converging close to the middle part of wind wheel and the first transportation work style backward and blows out shell；It is indoor close second in the second transportation work style power Be formed as the wind that circles round at inner sidewall, can blow out, facilitate in this way to electricity to wind wheel direction through motor tail portion on the path for the wind that circles round Machine carries out automatic synchronization heat dissipation, and later, the second transportation work style can also be converged blowout shell with the first transportation work style after the steering of the second wind wheel, right Second transportation work style is recycled, and therefore, will not cause to waste into the intracorporal wind-force of shell, while improving air duct in the middle part of wind wheel On wind-force.In addition, the specification ratio setting and wind guide ring radical length to the first Room and second Room are with respect to second Room The restriction of cross-sectional diameter ensure that the first transportation work style and the second transportation work style can not interfere with each other, and can send completing ventilation Guarantee the synchronization radiating treatment to motor while wind, guarantees that fan operation is steady, extend the service life of blower.Filter screen Material is fibrous filter net, non-woven fabrics filter cotton, fiber glass filtering net, active carbon filter net；For intracorporal to shell is entered Wind carries out initial filter, guarantees to have less dust in the wind by multiple air inlet holes, while filtering cabin is arranged, can protect multiple Air inlet hole is not plugged up.

As shown in Fig. 2, the end face of the other end of the shell is set towards outside camber protrusion in a preferred embodiment It sets, the multiple air inlet hole setting is on arcuate projection point.In the present solution, the tail end of motor towards setting in the middle part of end face It sets, multiple air inlet holes are arranged on end face in a ring, and end face protrudes outward setting simultaneously, can increase setting for air inlet hole Set area, improve intake, when the first transportation work style enters in second Room substantially not via motor but directly blow out shell through air duct Body, guarantee in the first transportation work style the micronic dust brought into will not directly hanging fascia on motor, avoid motor housing dust stratification excessive, influence to radiate Effect, in order to guarantee air intake, multiple air inlet holes can be set to string configuration, radially from the middle part by proximal end face Distribution.

It further include a pair of of handle in one preferred embodiment, it is parallel from second support plate to the outside of the car body It is extended.Convenient for people's grasping, to push axial flow blower to carry out the work that purging collects fallen leaves.

As shown in Fig. 2, the specification of the multiple air inlet hole is 5*20mm in a preferred embodiment.In the present solution, limiting Air inlet hole is string configuration, but is not easy to be arranged excessive, avoids sundries from entering in shell with the wind, to the internal mechanical structure of blower It causes to damage, and the distance between adjacent air inlet hole is set no more than 2cm, guarantee air intake.

As shown in Figure 1, the opening width of the annular groove is less than first Room cross-sectional diameter in a preferred embodiment 1/6.In the present solution, the opening width of annular groove only needs to meet the outer rim for wrapping wind wheel, it is formed simultaneously annular wall, to draw The fold-back of the second transportation work style is led, if setting is oversized, will affect wind wheel acting instead.

In one preferred embodiment, the angle in the cross section of the fan blade and first Room is 45-60.Guarantee to the first via The tangentially directed power of wind meets wind wheel acting needs.

As shown in Figure 1, in a preferred embodiment, further includes: fixed link, one end of which is fixed on the inner sidewalls of the shell On, the other end is fixed on the motor；Cover 401 is located on the air outlet of the shell；Support column 402, one end Extend from the output shaft of the motor through the center of the wind wheel to one end of the shell and is fixed in the cover On side wall.In the present solution, fixed link is used to support fixed motor, it can generally be arranged at least two, recommended setting 3, so that 3 Fixed link forms stable support to motor；Support column is used to carry out Auxiliary support to motor and wind wheel, reduces wind wheel and was running Mechanical oscillation in journey reduce noise, and cover avoids object from being strayed into the first Room or second Room while realizing outlet air, guarantee Blower operates normally.

In one preferred embodiment, the fixed link is sheet bar, and the vertical section of plane and the shell where sheet bar In parallel.Fixed link is arranged on air duct, laminated structure is set to, while fixed link is parallel with wind direction in air duct, with as far as possible It is reduced to obstruct wind-force.

As shown in Figure 1, the cross-sectional diameter of the support column is less than 3cm in a preferred embodiment.Such as: 2.5cm, 1.5cm or 1cm is mainly used for Auxiliary support effect, and setting principle is the cross-sectional diameter of support column less than in the middle part of wind wheel The cross-sectional diameter of wheel hub.

As shown in figure 5, in a preferred embodiment, the fan blade further includes air-intake side along 302 and air side edge 303, The air side edge of fan blade wind direction into the air duct, which is extended, wind deflector 305, the wind deflector One end extends at 306 periphery 2-3cm of wheel hub, and the other end of the wind deflector extends to the outer peripheral edge of fan blade but not embedding Enter in the annular groove, and the wind deflector is gradually reduced from its middle part to both ends width, the width of the wind deflector is 1-4cm.In practical applications, in order to allow wind through the inlet side of fan blade behind the blade face of fan blade inner sidewall from baffling to shell, and Finally blown out from air outlet, plane where generally setting fan blade to wheel hub has certain angle, so as to from inlet side into Enter the wind before fan blade and the effect of hydraulic barrier is provided, but still has part wind that can blow to shell from the air side edge of fan blade Inner sidewall causes the wind-force on air duct not enough to be concentrated, and therefore, wind deflector is arranged at air side edge in this programme, to stop Wind leaks out outward from the air side edge of fan blade, in practical applications in order to avoid the abatement of wind as far as possible, can also be oriented to wind The joining place at the air side edge of plate and fan blade is set as arc, or is directly integrally formed setting, plays the work for the water conservancy diversion that keeps out the wind With.

Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited In specific details and legend shown and described herein.

Claims

1. a kind of gardening collects fallen leaves axial-flow fan special characterized by comprising

Car body comprising sweep is a " u "-shaped plate body；Wheel body, rolling are arranged on the lower end surface of the sweep；First Support plate and the second support plate, are parallel to each other and are vertically arranged on the sweep；First semicircle is incised and the second semicircle It incises, is separately positioned on the middle part of the upper end of first support plate and second support plate；First support plate and The ratio of the height of second support plate is 1:2；Opening of first support plate close to the " u "-shaped plate body of the sweep Setting；

Shell has the tube structure of air outlet for one end, and the first Room that cross-sectional diameter does not wait is formed in the shell And second Room, first Room are arranged close to one end of the shell, the second Room is arranged close to the other end of the shell, The embedded setting of the opening direction of one end of the shell towards the " u "-shaped plate body is incised and the second semicircle in the first semicircle In shape is incised, and the air outlet of the shell extends to the opening of the " u "-shaped plate body；First Room and the second Room Length ratio be 2~5:1, the ratio of the cross-sectional diameter of the maximum cross-sectional diameter of the second Room and first Room is 6-8:5；The shell further includes changeover portion, is arranged between first Room and the second Room, in the axial direction of the housing, The changeover portion is arc, and the joining place of the part shell of the part shell of the changeover portion and first Room Be extended to second Room bending, and form annular groove in changeover portion, and the lateral wall of the shell of the changeover portion with It supports on the opening edge edge that second semicircle is incised；Multiple air inlet holes are evenly distributed on the another of the shell in a ring On the end face at end；

Motor, is arranged in the second Room middle part, and the output shaft of the motor is extended on the axial direction side of the shell Upwards, setting in the middle part of the end face of the other end of shell described in the tail end face of the motor；

Wind wheel is set on the outer rotor of the motor, and the close transition of the second Room is arranged in the wind wheel At section, it is from the other end of the shell to the air duct of one end of the shell that wind direction is formed in the wind wheel；The wind wheel The first wind wheel and the second wind wheel including coaxial arrangement, first wind wheel are arranged close to the changeover portion, and first wind The fan blade outer rim of wheel is rotatable to be buckled into the annular groove；Second wind wheel is arranged in first wind wheel and the motor Between, and the ratio of the diameter of the diameter of first wind wheel and second wind wheel is 2-3:1；

Wind guide ring, is an annular plate, and the wind guide ring radial direction is arc-shaped and axial direction to shell Bending, and the opening of arc, towards first Room, the big ring end of the wind guide ring is fixed at close to the shell On the side wall of the other end, the small ring end of the wind guide ring is extended to the tail end of the motor, and the wind guide ring Radical length is less than the 1/6 of the cross-sectional diameter of the second Room；

Filtering cabin is the cylinder of a both ends open, and one end of the filtering cabin be located in the end of the other end of the shell On face, the multiple air inlet hole be located in the filtering cabin；Filter screen is provided on the other end of the filtering cabin.

2. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that the other end of the shell End face is provided projectingly towards outside camber, and the multiple air inlet hole setting is on arcuate projection point.

3. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that it further include a pair of of handle, Setting is extended in parallel on the outside of from second support plate to the car body.

4. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that the rule of the multiple air inlet hole Lattice are 5*20mm.

5. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that the opening of the annular groove is wide Degree is less than the 1/6 of the maximum cross-sectional diameter of first Room.

6. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that the fan blade and described first The angle in the cross section of room is 35-45 degree.

7. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that further include:

Fixed link, one end of which is fixed on the inner sidewall of the shell, the other end is fixed on the motor；

Cover is located on the air outlet of the shell；

Support column, one end extend and consolidate to one end of the shell through the center of the wind wheel from the output shaft of the motor On the fixed extremely inner sidewall of the cover.

8. gardening as claimed in claim 7 collects fallen leaves axial-flow fan special, which is characterized in that the fixed link is sheet Bar, and plane where sheet bar is parallel with the vertical section of the shell.

9. gardening as claimed in claim 7 collects fallen leaves axial-flow fan special, which is characterized in that the cross section of the support column Diameter is less than 3cm.

10. gardening as described in claim 1 collects fallen leaves axial-flow fan special, which is characterized in that the fan blade further include into Wind side edge and air side edge, the air side edge of fan blade wind direction into the air duct, which is extended, wind guiding Plate, one end of the wind deflector extend at hub periphery 2-3cm, and the other end of the wind deflector extends to fan blade Outer peripheral edge but be not embedded in the annular groove, and the wind deflector is gradually reduced from its middle part to both ends width, the wind The width of guide plate is 1-4cm.