CN208778286U - Fan - Google Patents
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- CN208778286U CN208778286U CN201821084640.5U CN201821084640U CN208778286U CN 208778286 U CN208778286 U CN 208778286U CN 201821084640 U CN201821084640 U CN 201821084640U CN 208778286 U CN208778286 U CN 208778286U
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Abstract
The utility model discloses a kind of fan, and the fan includes tubular shell, first motor, the second motor, the first fan blade, the second fan blade and electric-controlled plate；The tubular shell both ends are in open setting；The first motor and second motor are mounted in the tubular shell, and the first motor and second motor coaxle are arranged；The first motor has first rotating shaft, and the first rotating shaft is axially extending along the tubular shell, and second motor has the second shaft, and first fan blade is installed on the first rotating shaft, and second fan blade is installed on second shaft；The electric-controlled plate is electrically connected the first motor and second motor, to control first fan blade and the second fan blade outlet air in the same direction.Technical solutions of the utility model can reduce noise under the premise of guaranteeing air output.
Description
Technical field
The utility model relates to field of home appliance technology, in particular to a kind of fan.
Background technique
Electric fan can be divided into ceiling fan, desk fan, stand fan, wall fan, ventilation fan, air cooler according to different function and form
Etc. a variety of；Tube-axial fan, cross flow fan, centrifugal fan and cross-flow type wind can be divided into according to the difference of air inlet/outlet mode
Fan etc. is a variety of.Wherein, tube-axial fan includes a kind of cylinder fan with barrel-shaped outline border, and the outlet air air-flow of cylinder fan is relative to other classes
It dissipates for the fan of type relatively slow, farther out, and throughput is larger for air supplying distance.In general, cylinder fan can be used for middle-size and small-size warehouse or
The ventilation fan in the biggish place of careat or it is some need air supplying distance farther out with need the biggish scene of air output, such as
Exhaust ventilation or air-supply for indoor small stadiums.But the larger air output of current cylinder fan maintenance needs the revolving speed of motor
Comparatively fast, and biggish noise can therefore be generated.
Utility model content
The main purpose of the utility model is to propose a kind of fan, it is intended to solve to generate when current cylinder fan air output is larger
The problem of loud noise.
To achieve the above object, the utility model proposes fan include tubular shell, first motor, the second motor,
One fan blade, the second fan blade and electric-controlled plate；The tubular shell both ends are in open setting；The first motor and second motor
It is mounted in the tubular shell, and the first motor and second motor coaxle are arranged；The first motor has
First rotating shaft, the first rotating shaft is axially extending along the tubular shell, and second motor has the second shaft, and described the
One fan blade is installed on the first rotating shaft, and second fan blade is installed on second shaft；Described in the electric-controlled plate electrical connection
First motor and second motor, to control first fan blade and the second fan blade outlet air in the same direction.
Preferably, first fan blade is identical as the torsional direction of second fan blade, and the first motor with it is described
Second motor rotates in same direction.
Preferably, first fan blade and second fan blade torsional direction on the contrary, and the first motor with it is described
Second motor relatively rotates.
Preferably, the electric-controlled plate includes rotating ratio adjustment module and steering adjustment module；Wherein, the rotating ratio is adjusted
Module is for adjusting and fixing the ratio between the first motor and second motor speed, and the steering adjustment module is for switching
The rotation direction of the first motor and second motor.
Preferably, the steering adjustment module includes protective switch, in the first motor and the second motor work
As when cut off the steering adjustment module.
Preferably, the electric-controlled plate further includes gear adjustment module, and the gear adjustment module includes editable gear
Editing machine and memory；The gear adjustment module further includes multiple preset gear selection keies and at least one customized gear choosing
Select key.
Preferably, the blade quantity of first fan blade is n1, the blade quantity of second fan blade is n2；Described first
The windup-degree of fan blade is θ1, the windup-degree of second fan blade is θ2；The angular speed of above-mentioned first fan blade rotation is ω1, on
The angular speed for stating the rotation of the second fan blade is ω2；Define first fan blade blade quantity and the second fan blade blade quantity it
Than the angle of the angular speed and the second fan blade of the ratio between, the first fan blade windup-degree and second fan blade windup-degree and the first fan blade
The product of the ratio between speed is the first coefficient of variation, then the first coefficient of variationThe first coefficient of variation k1∈
[0.6,1.67]。
Preferably, the first coefficient of variation k1∈[0.8,1.25]。
Preferably, the blade gross area of first fan blade is S1, the blade gross area of second fan blade is S2；Definition
Second coefficient of variation is the blade gross area of first fan blade and the ratio between the gross area of second fan blade and described first poor
The product of different coefficient, then the second coefficient of variationAnd k2∈ [0.8,1.25].
Preferably, the length of blade of first fan blade is l1, the length of blade of second fan blade is l2；Described first
Fan blade and the second fan blade spacing are L, thenAnd
Preferably, the fan further includes third fan blade, and the third fan blade is installed on the first rotating shaft.
Preferably, the third fan blade is set to the outside of the first fan blade, and the length of blade of the third fan blade is less than institute
State the length of blade of the first fan blade.
Preferably, the fan further includes the 4th fan blade, and the 4th fan blade is installed on second shaft.
Preferably, the 4th fan blade is set between first fan blade and second fan blade, and the 4th fan blade
Length of blade be less than second fan blade length of blade.
Technical solutions of the utility model can fan larger by using the outlet air in the same direction of the double fan blades of Dual-motors Driving in holding cylinder
The revolving speed because of fan blade is reduced while air output, to reduce the biggish noise generated by fan blade high speed rotation.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of the utility model fan；
Fig. 2 is the schematic diagram of the section structure of one embodiment of the utility model fan；
Fig. 3 is another embodiment schematic diagram of internal structure of the utility model fan；
Fig. 4 is the structural schematic diagram of the utility model fan another embodiment motor and fan.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Shell | 301 | Second shaft |
| 200 | First motor | 302 | Second fan blade |
| 201 | First rotating shaft | 400 | Third fan blade |
| 202 | First fan blade | 500 | 4th fan blade |
| 300 | Second motor |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
Aerofoil fan drives the inclined fan blade being fixed on machine shaft to rotate using motor, thus by air court
The axially driving air-out mode of motor, this fan structure is simple, and air-out mode is direct, and application is the most universal.Cylinder fan is axis
One of flow fan, the cylindrical outer casing with both ends open are cylinder fan and the obvious area in other aerofoil fan shapes and structure
Not.Other aerofoil fans are larger relative to stand fan or desk fan etc. for the air output of cylinder fan, are chiefly used in small depot or larger area
Indoor spaces exhaust fan, or need air supplying distance farther out or the biggish place of air output.To guarantee biggish air-out flow,
Cylinder fan generallys use high-speed motor, therefore and the noise of generation is also much higher than other household aerofoil fans.
The comparison of single fan blade and double fan blade outlet air abilities and noise control is carried out using stand fan as research object, specifically such as
Under:
The test of air quantity platform wind speed measurement is carried out by object of " beautiful FS40-12DR " stand fan, it is basic with other stand fans
Equally, it is 4m/s or so that the maximum of beautiful FS40-12DR, which goes out wind velocity,.Fan is opened, highest gear is adjusted to, air quantity platform is placed
In front of the fan axis at different distance, wind speed is detected, data are as follows:
| Distance (m) | 1 | 2 | 3 | 4 | 5 |
| Wind speed (m/s) | 3.85 | 2.47 | 1.65 | 0.75 | 0.6 |
From the point of view of experimental data, fan decays to nonlinear attenuation, and the more highly attenuating speed the faster, and is decaying at 3m
1.65m/s, and human feeling is to there is wind to need wind speed in 1.6m/s or so.
From above-mentioned test data, it could be assumed that, effective air supplying distance of common stand fan is 3m or so, with routine use
Middle experience is consistent.
In general, effective air supplying distance of 3m can satisfy the demand of most application scenarios, but in the isometric stream wind of stand fan
The noise that fan generates when opening to high tap position is larger.Gear and noise comparative test (shelves are equally carried out with " beautiful FS40-12DR "
The position the high, and then wind velocity is higher out)." beautiful FS40-12DR " mechanicalness noise control in similar product is preferable, in operation almost
The noise for not having component mechanical oscillation or friction and generating, therefore the noise detected can consider and all blow air-flow derived from fan blade
When the noise that generates.There are three gears for FS40-12DR tool, and the corresponding noise level of each gear is being detected at two meters of fan,
Data are as follows:
| Gear | 1 | 2 | 3 |
| Noise (decibel) | 36.3 | 43.2 | 53.8 |
Noise on daytime is more than 50 decibels, and night noise can interfere normal sleep and rest when being more than 45 decibels.According to sound
Environmental quality standards, the requirement of 0 class acoustic environment area (referring to the region that rehabilitative sanatorium care area etc. especially needs peace and quiet) be daytime noise not
Greater than 50 decibels, night noise is not more than 40 decibels；1 class acoustic environment area (refers to residential building, health care, culture and education, section
Grind design, administrative office is major function, the region for needing to keep quite) requirement be noise on daytime no more than 55 decibels, night
Late noise is not more than 45 decibels.
It follows that conventional stand fan at night in use, its maximum gear the noise that generates can be obvious
Influence sleep and rest.Even if the noise for passing generation in the case of maximum gear does not meet 0 class acoustic environment area yet on daytime
Requirement.
And the noise of the cylinder fan under working normally is higher than stand fan, noise can cause more serious interference to surrounding.
Therefore the stand fan of conventional single motor single blade structure and cylinder fan cannot under the premise of keeping sufficiently quietly,
Guarantee sufficient effective air supplying distance.
For this purpose, please referring to Fig. 1 to Fig. 3 the utility model proposes a kind of fan, the fan of the utility model includes cylindrical case
Body 100, first motor 200, the second motor 300, the first fan blade 202, the second fan blade 302 and electric-controlled plate；The tubular shell 100
Both ends are in open setting；The first motor 200 and second motor 300 are mounted in the tubular shell 100, and institute
It states first motor 200 and second motor 300 is coaxially disposed；The first motor 200 has a first rotating shaft 201, and described the
One shaft 201 has the second shaft 301, first fan blade along the axially extending of the tubular shell, second motor 300
202 are installed on the first rotating shaft 201, and second fan blade 302 is installed on second shaft 301；The electric-controlled plate is electrically connected
The first motor 200 and second motor 300 are connect, it is in the same direction to control first fan blade 202 and second fan blade 302
Outlet air.
First motor 200 drives the rotation of the first fan blade 202, and the second motor 300 drives the rotation of the second fan blade 302, first
It is automatically controlled to make the first fan blade 202 and the outlet air in the same direction of the second fan blade 302 when fan blade 202 is identical as 302 torsional direction of the second fan blade
Plate control first motor 200 and the second motor 300 rotate in same direction.Further, it is also possible to by the first fan blade 202 and the second fan blade 302
Torsional direction be reversed, at this point, to make the first fan blade 202 and the outlet air in the same direction of the second fan blade 302, the first electricity of electric-controlled plate control
Machine 200 and the second motor 300 rotate backward.
Noise source, can be under the premise of guaranteeing outlet air total amount using the outlet air in the same direction of double fan blades in the high-speed rotation of fan blade
The revolving speed for reducing fan blade, to reduce noise.
The tubular shell 100 of cylinder fan has certain rectified action to air-flow, and in the rectification of tubular shell 100 and fan blade high speed
Biggish noise can be generated when rotation, and has substantially eliminated a fan structure ontology vibration at present to reduce the noise of cylinder fan
And the noise generated, the substantially all blade driving air and tubular shell 100 of deriving from of noise when cylinder fans work is to air-flow
Rectification.Although reducing the noise that cylinder fan can be obviously reduced in fan blade revolving speed, the cylinder fan of list fan blade is reduced in fan blade revolving speed at present
While can also make cylinder fan air output be obviously reduced, make cylinder fan lose use value.
Two open ends of the tubular shell 100 of cylinder fan are respectively air inlet and air outlet, are located at outlet air with the first fan blade 202
Mouth side, the second fan blade 302 are illustrated for being located at air inlet side.
The air-flow that the rotation of second fan blade 302 generates also have when flowing through the first fan blade 202 in addition to axial momentum with
The momentum in axially vertical direction rotates formation week with the component in axially vertical direction under the action of tubular shell 100 in cylinder
To the rotary inertia of rotation, circumferential rotary inertia changes in direction under the rebound effect of the first fan blade 202, becomes main
Along axial momentum.It, can be in the case where the first fan blade 202 and 302 torsional direction of the second fan blade and direction of rotation are contrary
Being reached by the relationship between the first fan blade 202 of control and the revolving speed of the second fan blade 302 and the relationship between windup-degree will turn
Dynamic inertia is converted into the purpose of axial momentum to the greatest extent.
Blade driving air-flow has biggish disturbance, and the parameters of fan blade are fixed, therefore in a practical situation first
The rotary inertia for the air-flow that second fan blade 302 is driven can not be completely converted into axial momentum by fan blade 202, but can pass through ginseng
Actual maximum conversion effect is realized in several settings, and that is to say can be by 302 design parameter of the first fan blade 202 and the second fan blade
Setting, achieve the effect that the full extent improve Axial-running Out wind energy power.
The axial component of second 302 certain driving air-flows of fan blade generated axial wind-force after the driving of the first fan blade 202
Ratio between the component of vertical axial is related with the windup-degree of blade of the first fan blade 202, and windup-degree is smaller, the ratio
Be worth it is smaller, but simultaneously the first fan blade 202 to the driving effect of air-flow with regard to smaller.
Influence aerofoil fan outlet air ability factor include rotational speed omega, length of blade l, fan blade blade gross area S, fan blade
Blade quantity n, fan blade blade twist angle, θ, for single fan blade aerofoil fan, above-mentioned each influence factor is substantially all
The relationship being positively correlated with outlet air ability, but for the cylinder of double fan blades fan, the ratio and two fan blades of above-mentioned items factor
The outlet air ability that spacing L can also fan cylinder has apparent influence.
Cylinder is influenced for research and is fanned out to the relationship between each factor of wind energy power, is used on the basis of using control variate method
First method of substitution that contracts designs a series of test, specific as follows:
Axial direction when final outlet air is fanned to cylinder in view of the relationship between the blade quantity, windup-degree and revolving speed of two fan blades
Component and there is larger impact perpendicular to the ratio between axial component, therefore defines the first coefficient of variation k1For first wind
The ratio between blade quantity of the blade quantity of leaf 202 and the second fan blade 302, the windup-degree of first fan blade 202 and described the
The ratio between the revolving speed of the ratio between windup-degree of two fan blades 302, the revolving speed of first fan blade 202 and second fan blade 302 three
Product；Define the second coefficient of variation k2For the blade gross area of first fan blade 202 and total face of second fan blade 302
The product of the ratio between product and first coefficient of variation；Wherein, the windup-degree of first fan blade 202 is θ1, second wind
The windup-degree of leaf 302 is θ2；The blade quantity of first fan blade 202 is n1, the blade quantity of second fan blade 302 is
n2；The blade gross area of first fan blade 202 is S1, the blade gross area of second fan blade 302 is S2；First wind
The length of blade of leaf 202 is l1, the length of blade of second fan blade 302 is l2；First fan blade 202 and second wind
302 spacing of leaf is L；Then:
First coefficient of variation
Second coefficient of variation
First group: with k1For unique variable
Second group: with k2For unique variable
| k2 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 |
| Air output (m3/h) | 979 | 998 | 1042 | 1106 | 1110 | 1092 | 1001 |
| Air supplying distance (m) | 9.5 | 10 | 11 | 11 | 12 | 10.5 | 9.5 |
Third group: withFor unique variable
4th group: withFor unique variable
5th group: withFor unique variable
In five set test, when taking unique variable, each parameter of the variable is floated up and down but keeps the variable not
Become, for example, taking k with battery of tests1For unique variable, k is kept1It is constant, increaseReduce simultaneouslyIt keepsIt is constant, multiple groups test is carried out, k is excluded1Unusual data when each Parameters variation is larger, take consistency higher more
The average value of group test.
By that can obtain in above-mentioned five groups of tests, for cylinder fan, air supplying distance is approximate with air output proportional.And
And it can be concluded that respective preferred value interval, wherein the first coefficient of variation k1Preferred value interval be [0.6,1.2], and
And its best value interval is [0.8,1.2]；Second coefficient of variation k2Preferred value interval be [0.8,1.1]；It is preferred
Value interval is [0.8,1.2]；Preferred value interval be [0.8,1.1]；Preferred value interval be [0.4,1.2].
Electric-controlled plate in the utility model includes rotating ratio adjustment module and steering adjustment module；Wherein, the rotating ratio
Adjustment module adjusts mould for adjusting and fixing the ratio between the first motor 200 and described second motor, 300 revolving speed, the steering
Block is used to switch the rotation direction of the first motor 200 and second motor 300.
Turning to adjustment module tool, there are two types of shaping modes, and one is co-rotating mode, another kind is reversing mode, co-rotating mode
Under, fan forward direction outlet air, under reversing mode, the reversed outlet air of fan；Turning to adjustment module includes regulating switch and protective switch, is protected
Switch is protected for the cutting steering adjustment module in fan work, prevents the triggering steering regulating switch in fan work from making first
Motor 200 and the second motor 300 reversely damage at work；Regulating switch is turned to be used for when fan stops working pair
Switch the powering mode of first motor 200 and the second motor 300, to control fan forward direction or reversed outlet air.Protective switch is
Normally closed switch, when fan work, protective switch is opened, and cutting turns to the power supply of adjustment module；Power on when fan and
When not working, protective switch closure, turning to adjustment module be can work normally.
The utility model proposes fan the switching of positive outlet air and reversed outlet air may be implemented by tuning module, it is above-mentioned
Test data and preferred value interval are established under normal air-out mode, when cylinder fans reversed outlet air, air inlet and air outlet
It exchanges, the relationship of the first fan blade 202 and the second fan blade 302 is also exchanged accordingly, therefore in the present embodiment, is gone out to take into account forward direction
The value interval of the outlet air ability of wind and the outlet air ability of reversed outlet air, the first coefficient of variation and the second coefficient of variation takes its test
The inverse of the maximum and minimum value in the preferred section and best section that obtain, then the most value between this number and inverse is taken, obtain this
Preferred value interval and best value interval in embodiment.For example, the first coefficient of variation that above-mentioned experimental data obtains is excellent
Selected value section is [0.6,1.2], and the inverse that 0.6 inverse is 1.67,1.2 is 0.83, therefore first difference of the present embodiment
The preferred value interval of coefficient is [0.6,1.67], can similarly be obtained, the best value interval of the first coefficient of variation be [0.8,
1.25]；The preferred value interval of second coefficient of variation is [0.8,1.25].
Conventional fan usually presets three gears, and the bi-motor fan of the utility model can also carry out the default of gear,
Specifically, the electric-controlled plate in the present embodiment includes gear adjustment module, the gear adjustment module includes the volume of editable gear
Collect device and memory；The gear adjustment module further includes multiple preset gear selection keies and at least one customized gear selection
Key.Conventional cylinder fan only has a kind of air-out mode, is exactly the straight wind mode for reducing diffusion of the air-flow in flowing as far as possible, makes
Air-flow holding is gathered, and the air-flow dispersion angle of this air-out mode is small, and not being able to satisfy has larger diverging sometimes for air-flow
With wind demand when angle.
The fan of the utility model can be realized out by the ratio between the revolving speed of adjusting first motor 200 and the second motor 300
General mood stream is from the straight wind mode gathered to the adjusting with the gentle breeze mode compared with high dispersion angle.The gear of the utility model is adjusted
Module further includes the gear of air-out mode in addition to the gear of conventional controlled wind speed, wherein is included at least in preset gear soft
Wind mode and gear and straight wind mode and gear, cooperate the gear of different wind speed, and multi gear outlet air and straight wind under gentle breeze mode may be implemented
Multi gear outlet air under mode.In addition to this, user can be used gear editing machine and carry out customized gear setting, editable interior
Holding includes gross output and rotating ratio, saves in memory after the completion of editor, is associated with customized gear selection key,
That realizes customized air-out mode calls directly selection.
The blade of fan includes plane blade and cambered surface blade, it is noted that when using plane blade, by turning
To adjustment module change motor steering, air-out direction on the contrary, the first fan blade 202 and the second fan blade 302 rotating ratioTo out
The influence of wind effect be not applicable in foregoing teachings directly, needs to replace with the second fan blade 302 and the first fan blade 202 by being inverted
Rotating ratioWhen using cambered surface blade, change motor steering by turning to adjustment module, air-out direction is on the contrary, but outlet air
Effect and difference when using plane blade, outlet air ability increases when front-outlet, and outlet air ability has when reverse side outlet air
It is reduced, other aspects are coincide with above content.
Technical solutions of the utility model drive that blade twist is contrary by using the motor of mutually opposing rotation
One fan blade 202 and the second fan blade 302 driving air control first motor 200 and the second electricity along axial outlet air, and by electric-controlled plate
The revolving speed of machine 300 is in certain ratio range, to adjust the air-out mode of fan, such as by the first fan blade 202 and the second wind
The rotating ratio of leaf 302Control can make air-flow perpendicular to the momentum of motor axial direction when in the range of [0.9,1.0]
Cancelled out each other to making air-flow more gather, air output is bigger, and air supplying distance is farther, so as to meet certain air-supply away from
Under the premise of demand, the revolving speed of first motor 200 and the second motor 300, and then noise when reduction fan work are reduced；And
By electric-controlled plate by the rotating ratio of the first fan blade 202 and the second fan blade 302Control can use general mood stream when within 0.6
It scatters more quickly；By the editing machine and memory of editable gear, can by the commonly used air-out mode of user into
Edlin and storage, and be associated as customized gear and customized gear key, it can be selected after setting with a key
Select without need every time using when carry out repeat setting.
Above-described embodiment be using the specific embodiment of the fan of double fan blades, for further increase the air-supply of fan away from
From the utility model is on the basis of double fan blades, it is also proposed that another embodiment.
Referring to figure 4., the present embodiment fan further includes third fan blade 400, increases third fan blade 400 in double fan blades to back-out
On the basis of wind, it can carry out further rectifying adjusting, increase farthest air supplying distance.Specifically, the third fan blade 400 is pacified
Loaded on the first rotating shaft 201；The third fan blade 400 is set to another opposite with second fan blade 302 of the first fan blade 202
Side, and the length of blade of the third fan blade 400 is less than the length of blade of first fan blade 202.
Fan blade can change the flow velocity and flow direction of air-flow, using can be to air-flow into secondary adjustment when two groups of fan blades, and pass through
Two groups of fan blades are specifically set and are adjusted to achieve the purpose that artificially to adjust air-out effect, accordingly, this is practical
It is novel to propose the embodiment of above-mentioned two groups of fan blade fans.And it will receive the obstruction of surrounding air when air-flow flowing, therefore air-flow
Boundary have biggish unstability.Air-flow equivalent can divide into air flow stream center and air flow stream frontier district, compare it
Under, influence of the flow velocity of air flow stream center to air supplying distance is bigger, and air flow stream frontier district is affected to the angle of air-supply.
Therefore, the utility model proposes the embodiments for increasing rectification fan blade on the basis of above-mentioned double fan blades.
Wherein, third fan blade 400 be rectification fan blade, rectification fan blade be mainly used for adjust air flow stream center regional percentage and
Flow velocity has reached in the case where general power is constant, and the range and ratio by adjusting air flow stream center and frontier district obtain
Farther air supplying distance.
On this basis, to improve stability when fan operation and further increasing the detectability of rectification fan blade, this
Utility model proposes another embodiment, and fan further includes the 4th fan blade 500 in the present embodiment, and the 4th fan blade 500 is installed on
Second shaft 301 and be set between first fan blade 202 and second fan blade 302.Likewise, the 4th fan blade
500 length of blade is less than the length of blade of second fan blade 302.It should be pointed out that rectification fan blade can be used individually
Third fan blade 400 and the 4th fan blade 500 can also be arranged in third fan blade 400 or the 4th fan blade 500 simultaneously.
It rectifies fan blade and the first fan blade 202 and the second fan blade 302 cooperates, the adjustability of air-flow can be made stronger, and it is whole
The fan blade driving effect additional to air-flow is flowed, and the additional driving effect concentrates on wind beam center region, adjustable fan
The center of produced air flow stream and the regional percentage of frontier district and flow rate, to obtain farther outlet air distance.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (14)
1. a kind of fan characterized by comprising
Tubular shell, the both ends of the tubular shell are in open setting；
First motor is installed on the tubular shell, and the first motor has first rotating shaft, and the first rotating shaft is along the cylinder
Shape shell it is axially extending；
First fan blade is installed on the first rotating shaft；
Second motor, is installed on the tubular shell, and second motor has the second shaft；Second motor and described the
The setting of one motor coaxle；
Second fan blade is installed on second shaft；
Electric-controlled plate, the electric-controlled plate are electrically connected the first motor and second motor and control first fan blade and described
The outlet air in the same direction of second fan blade.
2. fan as described in claim 1, which is characterized in that the torsional direction phase of first fan blade and second fan blade
Together, and the first motor rotates in same direction with second motor.
3. fan as described in claim 1, which is characterized in that the torsional direction phase of first fan blade and second fan blade
Instead, and the first motor and second motor relatively rotate.
4. fan as claimed in claim 2 or claim 3, which is characterized in that the electric-controlled plate includes rotating ratio adjustment module and steering
Adjustment module；Wherein, the rotating ratio adjustment module is for adjusting and fixing the first motor and second motor speed
The ratio between, the rotation direction for turning to adjustment module and being used to switch the first motor and second motor.
5. fan as claimed in claim 4, which is characterized in that the steering adjustment module includes protective switch, described
First motor and second motor cut off the steering adjustment module when working.
6. fan as claimed in claim 4, which is characterized in that the electric-controlled plate further includes gear adjustment module, the gear
Adjustment module includes the editing machine and memory of editable gear；The gear adjustment module further includes multiple preset gear selections
Key and at least one customized gear selection key.
7. fan as described in claim 1, which is characterized in that the blade quantity of first fan blade is n1, second fan blade
Blade quantity be n2；The windup-degree of first fan blade is θ1, the windup-degree of second fan blade is θ2；Above-mentioned first
The angular speed of fan blade rotation is ω1, the angular speed of above-mentioned second fan blade rotation is ω2；Define the blade quantity of first fan blade
With the ratio between the ratio between the blade quantity of the second fan blade, the first fan blade windup-degree and the second fan blade windup-degree and the first fan blade
Angular speed and the product of the ratio between angular speed of the second fan blade be the first coefficient of variation, then the first coefficient of variation
The first coefficient of variation k1∈[0.6,1.67]。
8. fan as claimed in claim 7, which is characterized in that the first coefficient of variation k1∈[0.8,1.25]。
9. fan as claimed in claim 7, which is characterized in that the blade gross area of first fan blade is S1, second wind
The blade gross area of leaf is S2；Define the blade gross area and second fan blade that the second coefficient of variation is first fan blade
The product of the ratio between gross area and first coefficient of variation, then the second coefficient of variation
And k2∈ [0.8,1.25].
10. fan as claimed in claim 7, which is characterized in that the length of blade of first fan blade is l1, second wind
The length of blade of leaf is l2；First fan blade and the second fan blade spacing are L, thenAnd
11. fan as described in claim 1, which is characterized in that the fan further includes third fan blade, the third fan blade peace
Loaded on the first rotating shaft.
12. fan as claimed in claim 11, which is characterized in that the third fan blade is set to the outside of the first fan blade, and institute
The length of blade for stating third fan blade is less than the length of blade of first fan blade.
13. the fan as described in the claim of any one of claims 1 to 3 and 5 to 12, which is characterized in that the fan also wraps
The 4th fan blade is included, the 4th fan blade is installed on second shaft.
14. fan as claimed in claim 13, which is characterized in that the 4th fan blade is set to first fan blade and described the
Between two fan blades, and the length of blade of the 4th fan blade is less than the length of blade of second fan blade.
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| CN201821084640.5U CN208778286U (en) | 2018-07-09 | 2018-07-09 | Fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306968A (en) * | 2018-07-09 | 2019-02-05 | 广东美的环境电器制造有限公司 | Fan |
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2018
- 2018-07-09 CN CN201821084640.5U patent/CN208778286U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306968A (en) * | 2018-07-09 | 2019-02-05 | 广东美的环境电器制造有限公司 | Fan |
| CN109306968B (en) * | 2018-07-09 | 2024-01-23 | 广东美的环境电器制造有限公司 | Fan with fan body |
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