CN208778284U - Fan - Google Patents
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- CN208778284U CN208778284U CN201821084637.3U CN201821084637U CN208778284U CN 208778284 U CN208778284 U CN 208778284U CN 201821084637 U CN201821084637 U CN 201821084637U CN 208778284 U CN208778284 U CN 208778284U
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Abstract
The utility model discloses a kind of fan, wherein fan includes bracket, motor, the first fan blade, transmission mechanism and the second fan blade, and motor is installed on the bracket, and the motor has first rotating shaft, and the motor is stretched out at the both ends of the first rotating shaft；First fan blade is installed on one end of the first rotating shaft, the transmission mechanism is installed on the bracket and connects the other end of the first rotating shaft, the transmission mechanism includes the second shaft, the rotation direction of second shaft is opposite with the rotation direction of the first rotating shaft, second fan blade is installed on second shaft, and the inclined direction of the blade of first fan blade is opposite with the inclined direction of blade of second fan blade.Technical solutions of the utility model can reduce the noise of domestic fan.
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, household desk fan and stand fan are mostly tube-axial fan, under normal conditions household desk fan and stand fan air quantity compared with
Small, in high tap position, air quantity is relatively slightly larger, but can generate biggish noise when high tap position Wind Volume, and use environment multi-pass is normal
Influence for interior, noise can be bigger.In addition, tube-axial fan air-out mode is single, be not applied for needing air supplying distance compared with
Remote situation and need the closer situation of air supplying distance.For example, when parlor area is larger, the air-supply of normal domestic use stand fan away from
From being difficult to from the another side for blowing to parlor on one side in parlor, especially when swinging outlet air, air supplying distance is closer；In bedroom face
Product is smaller when needing to blow for the elderly or infant, and is easy to cause body-sensing wind speed very fast because distance is too close, is unfavorable for old
The health of year people or infant.
Utility model content
The main purpose of the utility model is to propose a kind of fan, it is intended to solve to produce when current domestic fan air output is larger
Raw noise is larger and influences user's life and the problem of rest.
To achieve the above object, the utility model proposes fan include bracket, motor, the first fan blade, transmission mechanism and
Second fan blade, wherein motor is installed on the bracket, and the motor has first rotating shaft, and the both ends of the first rotating shaft are equal
Stretch out the motor；First fan blade is installed on one end of the first rotating shaft, and the transmission mechanism is installed on the bracket
And connect the other end of the first rotating shaft, the transmission mechanism include the second shaft, the rotation direction of second shaft with
The rotation direction of the first rotating shaft is on the contrary, second fan blade is installed on second shaft, the blade of first fan blade
Inclined direction and the blade of second fan blade inclined direction on the contrary, so that first fan blade and second fan blade are anti-
To when rotation towards same side air-out.
Preferably, the transmission mechanism further includes reversing wheel group and mounting plate, and the mounting plate is fixed on the bracket, institute
Stating reversing wheel group includes driving wheel, output wheel and driving wheel group；The first rotating shaft connects the driving wheel, second shaft
Connect the output wheel；The driving wheel group connects the driving wheel and the output wheel, so that the output wheel and the drive
Wheel rotation is contrary.
Preferably, the reversing wheel group be gear set, the driving wheel group respectively with the driving wheel and the output wheel
Engagement.
Preferably, the driving wheel group include first gear, second gear, third gear and the connection first gear and
The third shaft of the second gear；The driving wheel engages with the first gear and is mounted on the side of the mounting plate；
The third gear is engaged with the second gear and the output wheel respectively, and the second gear, the third gear and
The output wheel is installed on the other side of the mounting plate；Wherein, the driving wheel, the first gear, the second gear,
The third gear and the output wheel are external gear.
Preferably, the radius of the driving wheel is r0, the radius of the first gear is r1, the radius of the second gear
For r2, the radius of the output wheel is R；The windup-degree of first fan blade is θ1, the windup-degree of second fan blade is
θ2；The first leaf blade quantity is n1, the second leaf blade quantity is n2；Defining the first coefficient of variation is described the
The windup-degree and second fan blade of the ratio between blade quantity of the blade quantity of one fan blade and the second fan blade, first fan blade
The ratio between windup-degree, first fan blade revolving speed and second fan blade the ratio between revolving speed three product, wherein described the
The revolving speed of one fan blade and the ratio between the revolving speed of second fan blade areThen the first coefficient of variation
And k1∈[0.6,1.67]。
Preferably, the first coefficient of variation k1∈[0.8,1.2]。
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 is the second coefficient of variation, 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；Then
Preferably, first fan blade and the second fan blade spacing are L；Then
Preferably, the driving wheel group includes the 4th gear, the 5th gear and connection the 4th gear and the described 5th
4th shaft of gear, the driving wheel engage with the 4th gear and are mounted on the side of the mounting plate；Described 5th
Gear engages with the output wheel and is installed on the other side of the mounting plate；Wherein, the driving wheel, the 4th gear,
5th gear is external gear, and the output wheel is internal gear.
Preferably, the radius of the driving wheel is r0, the radius of the 4th gear is r4, the radius of the 5th gear
For r5, the radius of the output wheel is R；The windup-degree of first fan blade is θ1, the windup-degree of second fan blade is
θ2；The first leaf blade quantity is n1, the second leaf blade quantity is n2；Defining the first coefficient of variation is described the
The windup-degree and second fan blade of the ratio between blade quantity of the blade quantity of one fan blade and the second fan blade, first fan blade
The ratio between windup-degree, first fan blade revolving speed and second fan blade the ratio between revolving speed three product, wherein described the
The revolving speed of one fan blade and the ratio between the revolving speed of second fan blade areThen the first coefficient of variation
And k1∈[2.5,4]。
Preferably, the ratio between the revolving speed of the revolving speed of first fan blade and second fan blade[3,4]。
Preferably, the fan further includes electric-controlled plate, and the motor is electrically connected the electric-controlled plate；The electric-controlled plate includes adjusting
It saves the speed adjusting module of the motor speed and adjusts the tuning module of the motor steering.
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 drive double fan blades to the air-out mode of rotation by using single motor, increase fan
Outlet air ability can meet the needs of biggish air output in the slow-speed of revolution, and then by dropping under the premise of keeping air output
Low motor speed is to achieve the purpose that reduce fan noise.
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 overall structure diagram of the utility model fan；
Fig. 2 is the utility model fan vane structural schematic diagram；
Fig. 3 is the structural schematic diagram of one embodiment of the utility model fan；
Fig. 4 is the schematic diagram of internal structure of the transmission mechanism of one embodiment of the utility model fan；
Fig. 5 is the structural schematic diagram of another embodiment of the utility model fan；
Fig. 6 is the exploded structure schematic diagram of transmission mechanism in another embodiment of the utility model fan；
Fig. 7 is blade structure schematic diagram in the another embodiment of the utility model fan.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Bracket | 305 | Second gear |
| 200 | Motor | 306 | Third gear |
| 201 | First rotating shaft | 307 | 4th gear |
| 202 | First fan blade | 308 | 5th gear |
| 300 | Transmission mechanism | 309 | Second shaft |
| 301 | Mounting plate | 310 | Third shaft |
| 302 | Driving wheel | 311 | Second fan blade |
| 303 | Output wheel | 400 | Third fan blade |
| 304 | First gear | 500 | 4th fan blade |
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.
The aerofoil fans such as household stand fan, desk fan are fixed on inclined on machine shaft using a motor drive
Fan blade rotation, so that this fan structure is simple, and air-out mode is direct by air towards the axially driving air-out mode of motor,
Using the most universal, but the air that the fan blade of this fan is pushed directly on is in addition to having along axial momentum, also have because
Fan blade and windage and the momentum vertical with shaft for generating gas, wherein the momentum of the air-flow vertical with shaft can make
Diffusion of gas stream is opened, and the cross section of air flow stream increases after air-flow scatters, axially movable when suffered resistance sharply increase, cause
Axial effective air supplying distance is closer, and when especially fan head swinging puts wind, axial effectively air supplying distance goes out compared to single direction
Air supplying distance when wind is closer.
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.
Therefore the stand fan of conventional single motor single blade structure cannot guarantee sufficient under the premise of keeping sufficiently quietly
Effective air supplying distance.Meanwhile conventional stand fan can not meet the air-supply demand of some larger spaces, such as area is biggish
The scene of the demands such as parlor.
Furthermore under some special application scenarios, such as it is infant's air-supply in the lesser bedroom of area or is old
When people's air-supply, what is needed is no longer biggish effective air supplying distance, but the gentle breeze that air-flow scatters as early as possible, to avoid
Larger wind speed blow-through infant or old man's body.Currently, people are usually by fan towards wall, using wall to the anti-of air-flow
Punching effect makes air-flow achieve the purpose that fast spread, and cannot be achieved the goal by directly adjusting fan.
For this purpose, the utility model proposes a kind of fans.The utility model proposes fan using a motor and one with
The transmission mechanism of motor connection controls the reverse rotations of two fan blades respectively, and the inclined directions of two fan blades is on the contrary, therefore two fan blade
Its air-out direction is identical when reverse rotation.
Specifically, please refer to Fig. 1 to Fig. 4 in the utility model embodiment, the utility model proposes fan include branch
Frame 100, motor 200, the first fan blade 202, transmission mechanism 300 and the second fan blade 311, wherein motor 200 is installed on the bracket
100, the motor 200 has first rotating shaft 201, and the motor 200 is stretched out at the both ends of the first rotating shaft 201；It is described
First fan blade 202 is installed on one end of the first rotating shaft 201, and the transmission mechanism 300 is installed on the bracket 100 and connects
The other end of the first rotating shaft 201, the transmission mechanism 300 include the second shaft 309, the rotation of second shaft 309
The rotation direction of direction and the first rotating shaft 201 is described on the contrary, second fan blade 311 is installed on second shaft 309
The inclined direction of the blade of the inclined direction of the blade of first fan blade 202 and second fan blade 311 is on the contrary, so that described first
Towards same side air-out when fan blade 202 and second fan blade 311 reversely rotate.
Fan blade is stretched out and connected in shaft one end of single fan blade axial fan motor, the utility model proposes fan shaft
Motor 200 is stretched out at both ends, and one end connects the first fan blade 202 for driving the rotation of the first fan blade 202, and the other end connects driver
Structure 300 drives the second shaft 309 by transmission mechanism 300 to drive the second fan blade 311 to rotate.Wherein, transmission mechanism 300 wraps
Mounting plate 301 and reversing wheel group are included, the reversing wheel group includes driving wheel 302, output wheel 303 and driving wheel group；Described first
Shaft 201 connects the driving wheel 302 to drive the driving wheel 302 to rotate；The driving wheel 302 connects the reversing wheel group
To drive the reversing wheel group to rotate；The reversing wheel group connects the output wheel 303 to drive the output wheel 303 to rotate；
The output wheel 303 connects the second shaft 309 to drive second shaft 309 to rotate；The rotation direction of the output wheel 303
With the rotation direction of the driving wheel 302 on the contrary, and the first rotating shaft 201 and second shaft 309 be coaxially disposed.
Reversing wheel group can be driven using belt pulley using belt friction, mutual between gear can also being used to utilize gear
Engaged transmission, is described in detail by taking gear drive as an example below:
Each gear of this implementation driving wheel group is external gear, and the driving wheel group specifically includes first gear 304, the second tooth
Wheel 305 and third gear 306, first gear 304 and second gear 305 are connected by third shaft 310, and third shaft 310 is logical
It crosses axle sleeve to be installed in rotation on mounting plate 301, first gear 304 and second gear 305 offer axis hole, and pass through axis
Hole is fixed on the both ends of third shaft 310；First gear 304 is engaged with driving wheel 302, third gear 306 respectively with the second tooth
Wheel 305 and output wheel 303 engage.Driving wheel 302, first gear 304 are located at the side of mounting plate 301, second gear 305,
Three gears 306 and output wheel 303 are located at the other side of mounting plate 301.
The first rotating shaft 201 of motor 200 drives driving wheel 302 and rotates in the same direction and at the same speed with driving wheel 302；Driving wheel
302 driving first gears 304 are simultaneously rotated backward with first gear 304；Second gear 305 and first gear 304 are turned by third
Axis 310 rotates in the same direction and at the same speed；Second gear 305 drives third gear 306 and rotates backward with third gear 306；Third tooth
306 driving output wheel 303 of wheel is simultaneously rotated backward with output wheel 303；Output wheel 303 drive the second shaft 309 and with the second shaft
309 rotate in the same direction and at the same speed.It is driven in the reverse direction and three drivings in the same direction between first rotating shaft 201 and the second shaft 309 by three
It realizes reversed and coaxial rotating, first motor 200 and then passes through first rotating shaft 201, reversing wheel group and the driving of the second shaft 309 the
One fan blade 202 and the second fan blade 311 are coaxial and reversely rotate.
In the present embodiment, the angular speed of first rotating shaft 201 is equal with the angular speed of driving wheel 302, the wheel week of driving wheel 302
The linear velocity in wheel week of linear velocity and first gear 304 it is identical, the angular speed of first gear 304 and the angle of second gear 305
Speed is identical, and the linear velocity in the wheel week of second gear 305 and the linear velocity in wheel week of third gear 306 are identical, third gear 306
Wheel week linear velocity and output wheel 303 wheel it is all linear velocity it is identical.
The radius of the driving wheel 302 is r0, the linear velocity in the wheel week of the driving wheel 302 is v0；The first gear
304 radius is r1, the linear velocity in the wheel week of the first gear 304 is v1；The radius of the second gear 305 is r2, described
The linear velocity in the wheel week of second gear 305 is v2；The radius of the output wheel 303 is R, the line in the wheel week of the output wheel 303
Speed is V, and the angular speed of first fan blade 202 is ω1, the angular speed of second fan blade 311 is ω2, then first wind
The ratio between revolving speed of the revolving speed of leaf 202 and second fan blade 311 is equal to the angular speed and second wind of first fan blade 202
The ratio between the angular speed of leaf 311, and specifically:
Technical solutions of the utility model drive a motor 200 of fan simultaneously and turn by using reversing wheel group
The first fan blade 202 and the second fan blade 311 that dynamic direction and blade lean direction are contrary, the first fan blade 202 and the second fan blade 311
Driving air is moved in the same direction so as to so that fan obtains bigger outlet air ability, and then in the premise for meeting fan outlet air demand
The revolving speed of motor 200 can be reduced, down to reduce the biggish noise generated therefrom.
Separately referring to figure 5. and Fig. 6, it is driven using gear and realizes that the second shaft 309 and first rotating shaft 201 coaxially reversely rotate
The specific structure that is not limited to the above embodiments of mode can also be combined in other embodiments using internal gear with external gear
Mode realize the coaxial reverse rotation of the second shaft 309 and first rotating shaft 201.In such a way that internal gear is combined with external gear
Under, the driving wheel group includes the 4th gear 307 and the 5th gear 308, and connection the 4th gear 307 and the described 5th
4th shaft of gear 308, the driving wheel 302 engage and are mounted on the one of the mounting plate 301 with the 4th gear 307
Side；5th gear 308 engages with the output wheel 303 and is installed on the other side of the mounting plate 301；Wherein, described
Driving wheel 302, the 4th gear 307, the 5th gear 308 are external gear, and the output wheel 303 is internal gear.
In the present embodiment, first rotating shaft 201 drives driving wheel 302 and rotates in the same direction and at the same speed with driving wheel 302；Driving wheel
302 the 4th gears 307 of driving are simultaneously rotated backward with the 4th gear 307；5th gear 308 passes through the 4th shaft and the 4th gear
307 rotate in the same direction and at the same speed；5th gear 308 drives output wheel 303 and rotates in same direction with output wheel 303；Output wheel 303 drives
Second shaft 309 is simultaneously rotated with the second shaft 309 in the same direction and at the same speed.Pass through one between first rotating shaft 201 and the second shaft 309
Be driven in the reverse direction with three in the same direction driving realize reversed and coaxial rotating, first motor 200 and then pass through first rotating shaft 201, reversed
Wheel group and the second shaft 309 drive the first fan blade 202 and the second fan blade 311 coaxially while and reversely rotating.
In the present embodiment, the angular speed of first rotating shaft 201 is equal with the angular speed of driving wheel 302, the wheel week of driving wheel 302
The linear velocity in wheel week of linear velocity and the 4th gear 307 it is identical, the angular speed of the 4th gear 307 and the angle of the 5th gear 308
Speed is identical, and the linear velocity in the wheel week of the 5th gear 308 and the linear velocity in wheel week of output wheel 303 are identical.
The radius of the driving wheel 302 is r0, the linear velocity in the wheel week of the driving wheel 302 is v0；4th gear
307 radius is r4, the linear velocity in the wheel week of the 4th gear 307 is v4；The radius of 5th gear 308 is r5, described
The linear velocity in the wheel week of the 5th gear 308 is v5；The radius of the output wheel 303 is R, the line in the wheel week of the output wheel 303
Speed is V, and the angular speed of first fan blade 202 is ω1, the angular speed of second fan blade 311 is ω2, then first wind
The ratio between revolving speed of the revolving speed of leaf 202 and second fan blade 311 is equal to the angular speed and second wind of first fan blade 202
The ratio between the angular speed of leaf 311, and specifically:
In addition, because in the present embodiment output wheel 303 be external gear, and need to meet output wheel 303 and first rotating shaft 201 and
Second shaft 309 is coaxial, thus in the present embodiment the radius R of output wheel 303, driving wheel 302 radius r0, the 4th gear 307
Radius r4And the 5th gear 308 radius r5Between meet:
R-r5=r0+r4
The gear quantity of the present embodiment driving wheel group is reduced than a upper embodiment, and the series of transmission decreases, because
This present embodiment compared to for a upper embodiment have higher power transfer ratio and lower energy loss.But the present embodiment
Output wheel 303 then require the radius R of output wheel 303 larger using internal gear using other gears of external gear, so as to cause
Ratio it is larger, be suitable for differential to rotation and the biggish situation of speed difference.
For the conventional Ian of single motor single fan blade, in the case where 200 output power of motor is certain, fan is influenced
The factor of outlet air ability (main includes air output and effective air supplying distance) includes the blade quantity of fan blade, single blade face
Windup-degree (when blade rotates, the angle in width of blade direction and leaf line directional velocity), the length of blade, leaf of product, blade
Piece width and blade rotational speed etc. are a variety of, these factors are not simple to the contribution of fan outlet air ability to be superimposed, but mutually meeting
It has a certain impact, for example, the area of single blade is the product of length of blade and width when being rectangle by blade equivalent,
One timing of area of single blade, the length of blade is bigger, and the outlet air total amount of fan can be bigger, but the length of blade and fan
Effective outlet air distance between relationship do not have consistency but, the length of blade is excessive or too small can all cause the effective of fan
The reduction of outlet air distance.
And for the utility model proposes single-motor double fan blade for the fan of rotation, two fan blades influence each other, two wind
The proportionate relationship of each factor between leaf also can the outlet air ability to fan cause large effect.It is with first rotating shaft 201
It is described as follows for the shaft in wind direction:
The air-flow that the rotation of second fan blade 311 generates also have when flowing through the first fan blade 202 in addition to axial momentum with
The momentum in axially vertical direction, that is to say also has the rotary inertia circumferentially rotated, and circumferential rotary inertia is in the first fan blade 202
Rebound effect under direction change, become momentum predominantly axially, ideally can be by controlling the first fan blade
202 and second fan blade 311 revolving speed between relationship and windup-degree between relationship reach and be completely converted into rotary inertia
The purpose of axial momentum.The axial momentum for the air-flow that second fan blade 311 is driven can further add when passing through the first fan blade 202
Speed, but the part component of vertical axial can be also generated simultaneously, to weaken the Axial-running Out wind energy power of fan to a certain extent.
The air-flow of blade driving has biggish disturbance, and the parameters of fan blade are fixed, therefore in a practical situation the
The rotary inertia for the air-flow that second fan blade 311 is driven can not be completely converted into axial momentum by one fan blade 202, but can be passed through
Practical maximum changing effect is realized in the setting of parameter, and that is to say can specifically be joined by the first fan blade 202 and the second fan blade 311
Several settings, gathers air-flow, achievees the effect that utmostly axial outlet air, to enhance the draft capacity of fan.Meanwhile it can also
Be converted into the axial momentum of fan outlet air more by the design parameter for adjusting the first fan blade 202 and the second fan blade 311
Circumferential momentum, thus make fan obtain air-flow can with the gentle breeze mode of fast spread, suitable for narrow space bedroom and be baby
The situation of child or old man's air-supply.
The axial component of second 311 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 fan blade factor include rotational speed omega, length of blade l, fan blade the blade gross area
S, the blade twist angle, θ of the blade quantity n of fan blade, fan blade, for single fan blade aerofoil fan, above-mentioned each influence factor base
The relationship being all positively correlated with outlet air ability in sheet, but for the aerofoil fan of double fan blades, the ratio of every factor and two
The spacing L of fan blade also can the outlet air ability on fan have apparent influence.
The relationship between each factor of fan outlet air ability is influenced for research, 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 outlet air final to fan in view of 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 311, 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 311, the revolving speed of first fan blade 202 and second fan blade 311 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 311
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 311 is θ2；The blade quantity of first fan blade 202 is n1, the blade quantity of second fan blade 311 is
n2；The blade gross area of first fan blade 202 is S1, the blade gross area of second fan blade 311 is S2；First wind
The length of blade of leaf 202 is l1, the length of blade of second fan blade 311 is l2；First fan blade 202 and second wind
311 spacing of leaf is L；The ratio between the revolving speed of first fan blade 202 and the second fan blade 311 is related with the radius of each gear of reversing wheel group,
The radius of the driving wheel 302 is r0, the radius of the first gear 304 is r1, the radius of the second gear 305 is r2, institute
The radius for stating delivery wheel is R, then,
Test is as follows when each gear of driving wheel group is external gear:
The ratio between the revolving speed of the revolving speed of first fan blade 202 and second fan blade 311
First coefficient of variation
Second coefficient of variation
First group: with k1For unique variable
| k1 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 | 1.3 |
| Air output (m3/h) | 831 | 864 | 904 | 937 | 976 | 970 | 945 | 915 | 874 |
| Air supplying distance (m) | 7.5 | 8 | 8 | 8.5 | 9 | 9 | 8.5 | 8 | 7.5 |
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) | 971 | 994 | 1020 | 1069 | 1077 | 1031 | 965 |
| Air supplying distance (m) | 9 | 9 | 10 | 10.5 | 10.5 | 10 | 9 |
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 keeps
WithIt is constant, multiple groups test is carried out, k is excluded1Unusual data when each Parameters variation is larger, take the higher multiple groups of consistency
The average value of test.
By that can be obtained in above-mentioned five groups of tests, for for counter-rotating fan, air supplying distance directly proportional pass approximate with air output
System, it can be deduced that the good conclusion of the air-flow property gathered.And it can be concluded that respective preferred value interval, wherein the first difference
Coefficient k1Preferred value interval be [0.6,1.2], and its best value interval be [0.8,1.2]；Second coefficient of variation k2's
It is preferred that value interval is [0.8,1.1]；Preferred value interval be [0.8,1.2]；Preferred value interval be [0.8,
1.1]；Preferred value interval be [0.4,1.2].
The fan of the utility model further includes electric-controlled plate, and the motor 200 is electrically connected the electric-controlled plate；The electric-controlled plate packet
It includes the speed adjusting module for adjusting 200 revolving speed of motor and adjusts the tuning module that the motor 200 turns to.The utility model proposes
Fan the switching of positive outlet air and reversed outlet air, above-mentioned test data and preferred value interval may be implemented by tuning module
It establishes under normal air-out mode, in the reversed outlet air of fan, air inlet and air outlet are exchanged, the first fan blade 202 and second
The relationship of fan blade 311 is also exchanged accordingly, therefore in the present embodiment, for the outlet air ability and reversed outlet air for taking into account positive outlet air
Outlet air ability, the value interval of the first coefficient of variation and the second coefficient of variation takes it to test the preferred section and optimal zone obtained
Between maximum and minimum value inverse, then take the most value between this number and inverse, obtain the preferred value interval in the present embodiment
With best value interval.For example, the preferred value interval for the first coefficient of variation that above-mentioned experimental data obtains is [0.6,1.2],
The inverse that 0.6 inverse is 1.67,1.2 is 0.83, therefore the preferred value interval of first coefficient of variation of the present embodiment is
[0.6,1.67] can similarly obtain, the best value interval of the first coefficient of variation is [0.8,1.25]；Second coefficient of variation it is excellent
Selected value section is [0.8,1.25].
Driving wheel group is internal gear group using internal gear and external gear, and using 311 side of the second fan blade as air-out direction
When test it is as follows:
The ratio between the revolving speed of the revolving speed of first fan blade 202 and second fan blade 311
First coefficient of variation
Second coefficient of variation
It is mainly rotating ratio with above-mentioned test difference, rotating ratio influences the first coefficient of variation and the second coefficient of variation, above-mentioned
First coefficient of variation and the second coefficient of variation consistency with higher in test, therefore the test of this group is directed to rotating ratio and first
Coefficient of variation compares, and data are as follows:
6th group: withFor unique variable
7th group: with k1For unique variable
| k1 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 |
| Air output (m3/h) | 932 | 900 | 886 | 851 | 762 | 714 |
| Air supplying distance (m) | 3.5 | 3 | 3 | 2.5 | 2 | 1.5 |
When taking unique variable, each parameter of the variable is floated up and down but keeps the variable constant, for example, with first group
Test takes k1For unique variable, k is kept1It is constant, increaseReduce simultaneouslyIt keepsWithIt is constant, it carries out
Multiple groups test, excludes k1Unusual data when each Parameters variation is larger take the average value of the higher multiple groups test of consistency.
In the case that above two groups of tests are apparent from equal air output compared to first five set test, air supplying distance obviously contracts
Short, the air-flow of fan outlet air at this time is quickly spread, and outlet air is soft.
In conjunction with air output and air supplying distance, whenWhen or work as k1∈ [2.5,4], the gentle breeze mode of fan is more
It is suitable for.
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.
Fig. 7 is please referred to, 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 311 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 309 and be set between first fan blade 202 and second fan blade 311.Likewise, the 4th fan blade
500 length of blade is less than the length of blade of second fan blade 311.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 311 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 (17)
1. a kind of fan characterized by comprising
Bracket；
Motor is installed on the bracket, and the motor has first rotating shaft, and the electricity is stretched out at the both ends of the first rotating shaft
Machine；
First fan blade is installed on one end of the first rotating shaft；
Transmission mechanism is installed on the bracket, and connects the other end of the first rotating shaft；The transmission mechanism includes second turn
The rotation direction of axis, second shaft is opposite with the rotation direction of the first rotating shaft；
Second fan blade is installed on second shaft；
Wherein, the blade lean direction of first fan blade is contrary with the blade lean of second fan blade.
2. fan as described in claim 1, which is characterized in that the transmission mechanism further includes reversing wheel group and mounting plate, institute
It states mounting plate and is fixed on the bracket, the reversing wheel group includes driving wheel, output wheel and driving wheel group；The first rotating shaft connects
The driving wheel is connect, second shaft connects the output wheel；The driving wheel group connects the driving wheel and the output
Wheel, so that the output wheel is opposite with the driving wheel rotation direction.
3. fan as claimed in claim 2, which is characterized in that the reversing wheel group is gear set, the driving wheel group difference
It is engaged with the driving wheel and the output wheel.
4. fan as claimed in claim 3, which is characterized in that the driving wheel group includes first gear, second gear, third
The third shaft of gear and the connection first gear and the second gear；The driving wheel engages simultaneously with the first gear
It is mounted on the side of the mounting plate；The third gear is engaged with the second gear and the output wheel respectively, and described
Second gear, the third gear and the output wheel are installed on the other side of the mounting plate；Wherein, the driving wheel, institute
Stating first gear, the second gear, the third gear and the output wheel is external gear.
5. fan as claimed in claim 4, which is characterized in that the radius of the driving wheel is r0, the radius of the first gear
For r1, the radius of the second gear is r2, the radius of the output wheel is R；The windup-degree of first fan blade is θ1, institute
The windup-degree for stating the second fan blade is θ2；The first leaf blade quantity is n1, the second leaf blade quantity is n2；It is fixed
Adopted first coefficient of variation is the ratio between the blade quantity of first fan blade and the blade quantity of the second fan blade, first fan blade
The revolving speed of the ratio between windup-degree of windup-degree and second fan blade, the revolving speed of first fan blade and second fan blade it
Than the product of three, wherein the revolving speed of first fan blade and the ratio between the revolving speed of second fan blade areThen
One coefficient of variation
And k1∈[0.6,1.67]。
6. fan as claimed in claim 5, which is characterized in that first coefficient of variation
k1∈[0.8,1.2]。
7. fan as claimed in claim 5, 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 is the second coefficient of variation, then the second coefficient of variation
And k2∈ [0.8,1.25].
8. fan as claimed in claim 7, which is characterized in that the length of blade of first fan blade is l1, second fan blade
Length of blade be l2；Then
9. fan as claimed in claim 8, which is characterized in that first fan blade is L with the second fan blade spacing；Then
10. fan as claimed in claim 3, which is characterized in that the driving wheel group includes the 4th gear, the 5th gear and company
The 4th shaft of the 4th gear and the 5th gear is connect, the driving wheel engages with the 4th gear and is mounted on institute
State the side of mounting plate；5th gear engages with the output wheel and is installed on the other side of the mounting plate；Wherein, institute
Stating driving wheel, the 4th gear, the 5th gear is external gear, and the output wheel is internal gear.
11. fan as claimed in claim 10, which is characterized in that the radius of the driving wheel is r0, the half of the 4th gear
Diameter is r4, the radius of the 5th gear is r5, the radius of the output wheel is R；The windup-degree of first fan blade is θ1,
The windup-degree of second fan blade is θ2；The first leaf blade quantity is n1, the second leaf blade quantity is n2；
Define the ratio between blade quantity of blade quantity and the second fan blade that the first coefficient of variation is first fan blade, first fan blade
Windup-degree and second fan blade the ratio between windup-degree, the revolving speed of first fan blade and the revolving speed of second fan blade
The ratio between three product, wherein the revolving speed of first fan blade and the ratio between the revolving speed of second fan blade areThen
First coefficient of variation
And k1∈[2.5,4]。
12. fan as claimed in claim 11, which is characterized in that turn of the revolving speed of first fan blade and second fan blade
The ratio between speed
13. fan as described in claim 1, which is characterized in that the fan further includes electric-controlled plate, and the motor is electrically connected institute
State electric-controlled plate；The electric-controlled plate includes the speed adjusting module for adjusting the motor speed and the tuning mould for adjusting the motor steering
Block.
14. 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.
15. fan as claimed in claim 14, 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.
16. the fan as described in any one of claim 1 to 15 claim, which is characterized in that the fan further includes the 4th
Fan blade, the 4th fan blade are installed on second shaft.
17. fan as claimed in claim 16, 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.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821084637.3U CN208778284U (en) | 2018-07-09 | 2018-07-09 | Fan |
| KR1020207034446A KR102500708B1 (en) | 2018-07-09 | 2018-12-26 | fan |
| JP2020568444A JP7030216B2 (en) | 2018-07-09 | 2018-12-26 | Fan |
| US17/258,072 US11493050B2 (en) | 2018-07-09 | 2018-12-26 | Fan |
| PCT/CN2018/123810 WO2020010809A1 (en) | 2018-07-09 | 2018-12-26 | Fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821084637.3U CN208778284U (en) | 2018-07-09 | 2018-07-09 | Fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208778284U true CN208778284U (en) | 2019-04-23 |
Family
ID=66153959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821084637.3U Active CN208778284U (en) | 2018-07-09 | 2018-07-09 | Fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208778284U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869358A (en) * | 2018-07-09 | 2018-11-23 | 广东美的环境电器制造有限公司 | Fan |
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2018
- 2018-07-09 CN CN201821084637.3U patent/CN208778284U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869358A (en) * | 2018-07-09 | 2018-11-23 | 广东美的环境电器制造有限公司 | Fan |
| CN108869358B (en) * | 2018-07-09 | 2023-09-01 | 广东美的环境电器制造有限公司 | Fan with fan body |
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