CN108999798B - Fan with fan body - Google Patents

Fan with fan body Download PDF

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Publication number
CN108999798B
CN108999798B CN201810749399.1A CN201810749399A CN108999798B CN 108999798 B CN108999798 B CN 108999798B CN 201810749399 A CN201810749399 A CN 201810749399A CN 108999798 B CN108999798 B CN 108999798B
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CN
China
Prior art keywords
fan
blade
fan blade
rotating shaft
wheel
Prior art date
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Active
Application number
CN201810749399.1A
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Chinese (zh)
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CN108999798A (en
Inventor
吴永强
崔世强
郭润明
张焕明
张旭升
易榕
方与
康瑞祥
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Midea Group Co Ltd
GD Midea Environment Appliances Manufacturing Co Ltd
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Midea Group Co Ltd
GD Midea Environment Appliances Manufacturing Co Ltd
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Priority to CN201810749399.1A priority Critical patent/CN108999798B/en
Publication of CN108999798A publication Critical patent/CN108999798A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a fan, which comprises a cylindrical shell, a motor, first fan blades, a reverse transmission mechanism and second fan blades, wherein the motor is arranged in the cylindrical shell and is provided with a first rotating shaft, two ends of the first rotating shaft extend out of the motor, the first fan blades are arranged at one end of the first rotating shaft, the reverse transmission mechanism comprises a reverse wheel set, a second rotating shaft and a mounting plate, and the mounting plate is arranged in the cylindrical shell; the reverse wheel set comprises a driving wheel, an output wheel and a transmission wheel set connected with the driving wheel and the output wheel, the first rotating shaft is connected with the driving wheel, the second rotating shaft is installed on the mounting plate and connected with the output wheel, the rotation direction of the output wheel is opposite to that of the driving wheel, the second fan blade is installed on the second rotating shaft, and the inclination direction of the blades of the first fan blade is opposite to that of the blades of the second fan blade. The technical scheme of the invention can reduce the noise of the barrel fan during working.

Description

Fan with fan body
Technical Field
The invention relates to the technical field of household appliances, in particular to a fan.
Background
The electric fans can be divided into ceiling fans, desk fans, floor fans, wall fans, ventilation fans, air-conditioning fans and the like according to different functions and forms; the air inlet and outlet modes can be divided into axial fans, cross-flow fans, centrifugal fans, cross-flow fans and the like. The axial flow fan comprises a barrel fan with a barrel-shaped outer frame, the air outlet flow of the barrel fan dissipates slowly relative to other types of fans, the air supply distance is far, and the air flow is large. In general, the barrel fan can be used for ventilating fans in small and medium-sized warehouses or places with larger indoor areas, or scenes needing long air supply distance and large air supply amount, such as exhaust ventilation or air supply for indoor small-sized stadiums. However, the current barrel fan requires a relatively high rotational speed of the motor to maintain a relatively large air supply volume, and thus generates relatively large noise.
Disclosure of Invention
The invention mainly aims to provide a fan, which aims to solve the problem that the conventional barrel fan generates larger noise when the air supply amount is larger.
In order to achieve the above purpose, the fan provided by the invention comprises a cylindrical shell, a motor, a first fan blade, a reverse transmission mechanism and a second fan blade, wherein two ends of the cylindrical shell are arranged in an open mode, the motor is installed in the cylindrical shell and is provided with a first rotating shaft, two ends of the first rotating shaft extend out of the motor, the first fan blade is installed at one end of the first rotating shaft, the reverse transmission mechanism is fixed in the cylindrical shell, the reverse transmission mechanism comprises a reverse wheel set, a second rotating shaft and an installation plate, the installation plate is installed in the cylindrical shell, the reverse wheel set comprises a driving wheel, an output wheel and a transmission wheel set connected with the driving wheel and the output wheel, the first rotating shaft is connected with the driving wheel, the second rotating shaft is installed in the installation plate and is connected with the output wheel, the driving wheel and the output wheel is coaxially arranged, the rotation direction of the output wheel and the driving wheel is opposite to the rotation direction of the second rotating shaft, and the inclination direction of the blades of the first fan blade is opposite to the inclination direction of the blades of the second fan blade.
Preferably, the reverse wheel set is a gear set, and the transmission wheel set is meshed with the driving wheel and the output wheel respectively.
Preferably, the transmission wheel set comprises a first gear, a second gear, a third gear and a third rotating shaft for connecting the first gear and the second gear; the driving wheel is meshed with the first gear and is arranged on one side of the mounting plate; the third gear is meshed with the second gear and the output wheel respectively, and the second gear, the third gear and the output wheel are mounted on the other side of the mounting plate.
Preferably, the radius of the driving wheel is r 0 The radius of the first gear is r 1 The radius of the second gear is r 2 The radius of the conveying wheel is R; the torsion angle of the first fan blade isThe torsion angle of the second fan blade isThe method comprises the steps of carrying out a first treatment on the surface of the The number of the blades of the first fan blade is +.>The number of the blades of the second fan blade is +.>The method comprises the steps of carrying out a first treatment on the surface of the Defining a first difference coefficient as the ratio of the number of blades of the first fan blade to the number of blades of the second fan blade, the ratio of the torsion angle of the first fan blade to the torsion angle of the second fan blade, and the ratio of the rotating speed of the first fan blade to the rotating speed of the second fan bladeWherein the ratio of the rotational speed of the first fan blade to the rotational speed of the second fan blade ∈>The method comprises the steps of carrying out a first treatment on the surface of the Then a first coefficient of difference。
Preferably, the first coefficient of difference。
Preferably, the ratio of the rotational speed of the first fan blade to the rotational speed of the second fan blade。
Preferably, the total blade area of the first blade isThe total area of the blades of the second fan blade is +.>The method comprises the steps of carrying out a first treatment on the surface of the Defining a second difference coefficient as the product of the sum of the ratio of the total area of the blades of the first fan blade to the total area of the second fan blade and the first difference coefficient, and then the second difference coefficient +.>And->。
Preferably, the length of the first fan blade isThe length of the second fan blade is +.>The method comprises the steps of carrying out a first treatment on the surface of the Then->。
Preferably, the distance between the first fan blade and the second fan blade is L,。
preferably, the fan further comprises an electric control board, and the motor is electrically connected with the electric control board; the electric control board comprises a speed regulating module for regulating the rotating speed of the motor and a direction regulating module for regulating the steering of the motor.
Preferably, the fan further comprises a third fan blade, and the third fan blade is mounted on the first rotating shaft.
Preferably, the third fan blade is arranged at the outer side of the first fan blade, and the length of the third fan blade is smaller than that of the first fan blade.
Preferably, the fan further comprises a fourth fan blade, and the fourth fan blade is installed on the second rotating shaft.
Preferably, the fourth fan blade is disposed between the first fan blade and the second fan blade, and the length of the fourth fan blade is smaller than that of the second fan blade.
According to the technical scheme, the double-fan blade counter-rotating structure is adopted, so that the air outlet capacity of the barrel fan is increased, and the rotating speed of the fan blade can be reduced under the condition that the barrel fan meets the working requirement of large air outlet quantity, so that large noise generated by high-speed rotation of the fan blade is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a fan according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment of a fan according to the present invention;
FIG. 3 is a schematic diagram of a reverse driving mechanism in an embodiment of a fan according to the present invention;
FIG. 4 is a schematic view of the internal structure of the reverse driving mechanism in an embodiment of the fan according to the present invention;
fig. 5 is a schematic view of a fan blade according to another embodiment of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The axial flow fan adopts a motor to drive an inclined fan blade fixed on a motor rotating shaft to rotate, so that air is driven towards the axial direction of the motor, the fan is simple in structure and direct in air-out mode, and is most commonly applied, but the air directly pushed by the fan blade of the fan has axial momentum, and further has the momentum vertical to the rotating shaft, which is generated by gas due to friction between the fan blade and the air, wherein the momentum of the air flow vertical to the rotating shaft can spread the air flow, the cross section of an air flow beam is increased after the air flow spreads, the resistance applied to the air flow beam during axial movement is increased sharply, and the axial effective air supply distance is relatively short.
The barrel fan is one of the axial fans, and the barrel casing with both ends open is a clear distinction in the outline of the barrel fan from other axial fans. The air output of the barrel fan is larger than that of other axial fans such as a floor fan, a desk fan and the like, and the barrel fan is often used for an exhaust fan of a small warehouse or an indoor place with a large area, or a place with a large air supply distance or large air supply amount. In order to ensure a larger air outlet flow, the barrel fan usually adopts a high-speed motor, so that the generated noise is far higher than that of other household axial flow fans.
In order to reduce noise on the premise of ensuring the fan-out air volume of a barrel, referring to fig. 1 to 4, the fan provided by the invention adopts a motor 200 to drive two blades to rotate relatively, and specifically comprises a barrel-shaped shell 100, the motor 200, a first blade 202, a reverse transmission mechanism 300 and a second blade 305, wherein two ends of the barrel-shaped shell 100 are arranged in an open mode, the motor 200 is installed in the barrel-shaped shell 100 and is provided with a first rotating shaft 201 with two ends extending out of the motor 200, the first blade 202 is installed at one end of the first rotating shaft 201, the reverse transmission mechanism 300 is fixed in the barrel-shaped shell 100, the reverse transmission mechanism 300 comprises a reverse wheel set, a second rotating shaft 304 and a mounting plate 301, the mounting plate 301 is installed in the barrel-shaped shell 100, the reverse wheel set comprises a driving wheel 302, an output wheel and a transmission wheel set connecting the driving wheel 302 and the output wheel, the first rotating shaft 201 is connected with the driving wheel 302, the second rotating shaft 304 is installed in the mounting plate 301 and is connected with the output wheel 302 and is arranged in the direction opposite to the second rotating shaft 305, and the second rotating shaft 304 is arranged in the direction opposite to the direction of the second rotating shaft 202.
The invention adopts a motor 200 to drive the first fan blade 202 and the second fan blade 305 simultaneously through the first rotating shaft 201 and the reverse transmission mechanism 300, and the rotating directions of the first fan blade 202 and the second fan blade 305 are opposite. The reverse transmission mechanism 300 adopts a wheel set for transmission, and can adopt a common wheel set such as a belt pulley or a gear, and the embodiment is illustrated by taking the gear as an example. The reverse transmission mechanism 300 in this embodiment is divided into three parts, a first part is a driving wheel 302 connected to the first rotating shaft 201, a second part is an output wheel connected to the second rotating shaft 304, and a third part is a transmission wheel set connected to the driving wheel 302 and the output wheel simultaneously. The driving wheel set comprises a first gear 306, a second gear 307 and a third gear 308, wherein the first gear 306 and the second gear 307 are connected through a third rotating shaft 309, the third rotating shaft 309 is rotatably arranged on the mounting plate 301 through a shaft sleeve, and the first gear 306 and the second gear 307 are provided with shaft holes and are fixed at two ends of the third rotating shaft 309 through the shaft holes; the first gear 306 is meshed with the drive wheel 302 and the third gear 308 is meshed with the second gear 307 and the output wheel, respectively. The drive wheel 302, the first gear 306 are located on one side of the mounting plate 301, and the second gear 307, the third gear 308 and the output wheel are located on the other side of the mounting plate 301.
The first rotating shaft 201 of the motor 200 drives the driving wheel 302 and rotates in the same direction with the driving wheel 302; the driving wheel 302 drives the first gear 306 and rotates in the opposite direction to the first gear 306; the second gear 307 and the first gear 306 rotate in the same direction through a third rotation shaft 309; the second gear 307 drives the third gear 308 and rotates in reverse with the third gear 308; the third gear 308 drives the output wheel and rotates in opposite directions with the output wheel; the output wheel drives the second rotating shaft 304 and rotates in the same direction as the second rotating shaft 304. The first rotating shaft 201 and the second rotating shaft 304 realize reverse and coaxial rotation through three reverse driving and three same-direction driving, and the first motor 200 further drives the first fan blade 202 and the second fan blade 305 to rotate coaxially and reversely through the first rotating shaft 201, the reverse wheel set and the second rotating shaft 304.
The cylindrical shell 100 of the cylindrical fan has a certain rectifying effect on the airflow, and larger noise is generated when the cylindrical shell 100 rectifies and the blades rotate at a high speed, but the noise generated by the vibration of the structural body of the cylindrical fan is basically eliminated for reducing the noise of the cylindrical fan at present, and the noise generated when the cylindrical fan works is basically all sourced from the fan blade driving air and the rectification of the airflow by the cylindrical shell 100. The noise of the barrel fan is obviously reduced when the rotating speed of the fan blade is reduced, but the air output of the barrel fan is obviously reduced when the rotating speed of the fan blade is reduced, so that the barrel fan loses use value.
The two open ends of the cylindrical housing 100 of the barrel fan are an air inlet and an air outlet, respectively, and the first fan blade 202 is located at one side of the air outlet, and the second fan blade 305 is located at one side of the air inlet.
When the air flow generated by the rotation of the second fan blade 305 flows through the first fan blade 202, the air flow has axial momentum and also has axial momentum in the direction perpendicular to the axial direction, under the action of the cylindrical shell 100, a component perpendicular to the axial direction rotates in the cylinder to form circumferential rotational moment inertia, the circumferential rotational moment inertia changes in direction under the rebound action of the first fan blade 202 and becomes the axial momentum mainly, and the aim of converting all the rotational moment inertia into the axial momentum can be achieved by controlling the relation between the rotational speeds and the torsion angles of the first fan blade 202 and the second fan blade 305. The axial momentum of the airflow driven by the second fan blade 305 will be further accelerated when passing through the first fan blade 202, but a partial component perpendicular to the axial direction will be generated, so that the axial wind-out capability of the barrel fan is weakened to a certain extent.
The airflow driven by the fan blades has larger disturbance, and all parameters of the fan blades are fixed, so that in actual conditions, the first fan blade 202 cannot fully convert the rotational inertia of the airflow driven by the second fan blade 305 into axial momentum, but the actual maximum conversion effect can be realized through parameter setting, namely, the effect of improving the axial wind outlet capacity to the greatest extent can be achieved through setting specific parameters of the first fan blade 202 and the second fan blade 305.
According to the technical scheme, the motor 200 of the barrel fan can drive the first fan blade 202 and the second fan blade 305 with opposite rotation directions and opposite blade inclination directions simultaneously by adopting the reverse wheel set, and the first fan blade 202 and the second fan blade 305 drive air to move in the same direction, so that the barrel fan can obtain larger air outlet capacity, and the rotating speed of the motor 200 can be reduced on the premise of meeting the requirement of barrel fan-out, so that larger noise generated by the rotating speed can be reduced.
The ratio between the axial wind force and the vertical axial component generated after the axial component of the airflow driven by the second fan blade 305 is driven by the first fan blade 202 is related to the torsion angle of the blades of the first fan blade 202, and the smaller the torsion angle is, the smaller the ratio is, but at the same time, the smaller the driving effect of the first fan blade 202 on the airflow is.
Factors affecting the fan-out capability of an axial flow fan include rotational speedLeaf length->The total area of the blades of the fan blade>The number of blades of the fan blade->Blade torsion angle of blade>For a single-blade axial flow fan, the above influencing factors are basically in positive correlation with the air outlet capacity, but for a double-blade axial flow fan, the ratio of the factors and the distance L between the two blades can also have obvious influence on the air outlet capacity of the barrel fan.
In order to study the relation among factors influencing the fan-out capability of the barrel, a series of tests are designed by adopting a reduced element substitution method on the basis of adopting a control variable method, and the method comprises the following specific steps:
considering that the relationship among the number of blades, the torsion angle and the rotating speed of the two blades has great influence on the proportion between the axial component and the component perpendicular to the axial direction when the barrel fan finally outputs air, a first difference coefficient is definedIs the product of the ratio of the number of the blades of the first fan blade 202 to the number of the blades of the second fan blade 305, the ratio of the torsion angle of the first fan blade 202 to the torsion angle of the second fan blade 305, and the ratio of the rotation speed of the first fan blade 202 to the rotation speed of the second fan blade 305; defining a second difference coefficient->Is the product of the ratio of the total area of the first fan blade 202 to the total area of the second fan blade 305 and the first difference coefficient; wherein the torsion angle of the first fan blade 202 is +.>The second fan blade 305 has a twist angle of +.>The method comprises the steps of carrying out a first treatment on the surface of the The number of the first fan blades 202 is +.>The number of the second fan blades 305 is +.>The method comprises the steps of carrying out a first treatment on the surface of the The total blade area of the first blade 202 is +.>The total blade area of the second blade 305 is +.>The method comprises the steps of carrying out a first treatment on the surface of the The first mentionedThe blade length of the fan blade 202 is +.>The length of the second blade 305 is +.>The method comprises the steps of carrying out a first treatment on the surface of the The distance between the first fan blade 202 and the second fan blade 305 is L; the ratio of the rotational speeds of the first fan blade 202 and the second fan blade 305 is related to the radius of each gear of the reverse wheelset, and the radius of the driving wheel 302 is r 0 The radius of the first gear 306 is r 1 The radius of the second gear 307 is r 2 The radius of the conveying wheel is R, and then:
the ratio of the rotational speed of the first fan blade 202 to the rotational speed of the second fan blade 305
The first difference coefficient
The second difference coefficient
A first group: to be used forAs the sole variable
Second group: to be used forAs the sole variable
Third group: to be used forAs the sole variable
Fourth group: to be used forAs the sole variable
Fifth group: to be used forAs the sole variable
In the above five tests, when a unique variable is taken, the parameters of the variable are floated up and down but the variable is kept unchanged, e.g. taken in the first test setFor the sole variable as an example, hold +.>Unchanged, increase->At the same time reduce +.>Hold and holdAnd->Unchanged, multiple groups of experiments were performed, excluding +.>Abnormal data when the variation of each parameter is large is taken as an average value of a plurality of groups of tests with high consistency.
From the five groups of tests, it can be obtained that, for the barrel fan, the air supply distance and the air output are approximately in direct proportion. And can obtain respective preferred value intervals, wherein the first difference coefficientThe preferred interval of the value of (2) is [0.6,1.2 ]]And the optimal value interval is [0.8,1.2 ]]The method comprises the steps of carrying out a first treatment on the surface of the Second coefficient of difference->The preferred interval of the value is [0.8,1.1 ]]；/>The preferred interval of value of (2) is +.>；/>The preferred interval of value of (2) is +.>；/>The preferred interval of the value is [0.4,1.2 ]]。
The fan of the invention also comprises an electric control board, and the motor 200 is electrically connected with the electric control board; the electric control board comprises a speed regulating module for regulating the rotating speed of the motor 200 and a direction regulating module for regulating the steering direction of the motor 200. The fan provided by the invention can realize the switching between the forward air outlet and the reverse air outlet through the direction adjusting module, the test data and the optimized value interval are established in the self-normal air outlet mode, when the barrel fan reversely outputs air, the air inlet and the air outlet are exchanged, and the relation between the first fan blade 202 and the second fan blade 305 is correspondingly exchanged, so in the embodiment, the first difference coefficient and the second difference coefficient are used for considering the air outlet capacity of the forward air outlet and the air outlet capacity of the reverse air outletAnd taking the reciprocal of the maximum and minimum values of the optimal interval and the optimal interval obtained by the test of the value interval of the coefficient, and taking the maximum value between the number of the coefficients and the reciprocal to obtain the optimal value interval and the optimal value interval in the embodiment. For example, the preferred value interval of the first difference coefficient obtained from the experimental data is [0.6,1.2]Since the reciprocal of 0.6 is 1.67,1.2 and the reciprocal is 0.83, the preferred value interval of the first difference coefficient of the present embodiment is [0.6,1.67 ]]Similarly, the optimal value interval of the first difference coefficient is [0.8,1.25 ]]The method comprises the steps of carrying out a first treatment on the surface of the The preferred value interval of the second difference coefficient is。
The embodiment is a specific embodiment of a fan with double fan blades, and in order to further improve the air supply distance of the fan, the invention also provides another embodiment based on the double fan blades.
Referring to fig. 5, the fan of the present embodiment further includes a third fan blade 400, and the addition of the third fan blade 400 can perform further rectification adjustment on the basis of the dual fan blade pair wind outlet, so as to increase the furthest wind supply distance. Specifically, the third fan blade 400 is mounted on the first rotating shaft 201; the third fan blade 400 is disposed on the other side of the first fan blade 202 opposite to the second fan blade 305, and the blade length of the third fan blade 400 is smaller than the blade length of the first fan blade 202.
The fan blades can change the flow speed and the flow direction of the air flow, the air flow can be secondarily adjusted when the two groups of fan blades are adopted, and the purpose of manually adjusting the air outlet effect is achieved by carrying out specific setting and adjustment on the two groups of fan blades. While the flow of the air flow is hindered by the surrounding air, the boundary of the air flow has larger instability. The air flow can be equivalently divided into an air flow beam central area and an air flow beam boundary area, and compared with the air flow beam central area, the air flow velocity has larger influence on the air supply distance, and the air flow beam boundary area has larger influence on the air supply angle. Therefore, the invention provides an embodiment of adding the rectifying fan blade on the basis of the double fan blades.
The third fan blade 400 is a rectifying fan blade, and the rectifying fan blade is mainly used for adjusting the area proportion and the flow velocity of the central area of the airflow beam, so that the longer air supply distance is obtained by adjusting the range and the proportion of the central area and the boundary area of the airflow beam under the condition that the total power is unchanged.
On the basis of this, in order to improve the stability of the fan during operation and further improve the rectifying capability of the rectifying fan blade, another embodiment of the present invention is provided, where the fan further includes a fourth fan blade 500, and the fourth fan blade 500 is installed on the second rotating shaft 304 and is disposed between the first fan blade 202 and the second fan blade 305. Similarly, the blade length of the fourth blade 500 is smaller than the blade length of the second blade 305. It should be noted that, the third fan blade 400 or the fourth fan blade 500 may be used as the rectifying fan blade alone, or the third fan blade 400 and the fourth fan blade 500 may be disposed at the same time.
The rectifying fan blade is matched with the first fan blade 202 and the second fan blade 305, so that the adjustability of the air flow is stronger, the rectifying fan blade has an additional driving effect on the air flow, the additional driving effect is concentrated in the central area of the air beam, and the area proportion and the flow velocity proportion of the central area and the boundary area of the air flow beam generated by the fan can be adjusted, so that a longer air outlet distance is obtained.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (12)

1. A fan, comprising:
the two ends of the cylindrical shell are arranged in an open mode;
the motor is arranged in the cylindrical shell, the motor is provided with a first rotating shaft, and two ends of the first rotating shaft extend out of the motor;
the first fan blade is arranged at one end of the first rotating shaft;
the reverse transmission mechanism is fixed in the cylindrical shell; the reverse transmission mechanism comprises a reverse wheel set, a second rotating shaft and a mounting plate; the mounting plate is mounted on the cylindrical shell; the reverse wheel set comprises a driving wheel, an output wheel and a transmission wheel set connected with the driving wheel and the output wheel; the first rotating shaft is connected with the driving wheel, the second rotating shaft is arranged on the mounting plate, and the second rotating shaft is connected with the output wheel; the driving wheel and the output wheel are coaxially arranged, and the rotation directions of the output wheel and the driving wheel are opposite;
the second fan blade is arranged on the second rotating shaft;
wherein, the blade inclination direction of the first fan blade is opposite to the blade inclination direction of the second fan blade;
the transmission wheel group comprises a first gear and a second gear, and the radius of the driving wheel is r 0 The radius of the first gear is r 1 The radius of the second gear is r 2 The radius of the output wheel is R; the torsion angle of the first fan blade isThe torsion angle of the second fan blade is +.>The method comprises the steps of carrying out a first treatment on the surface of the The number of the blades of the first fan blade is +.>The number of the blades of the second fan blade isThe method comprises the steps of carrying out a first treatment on the surface of the Defining a first difference coefficient as the product of the ratio of the number of blades of the first fan blade to the number of blades of the second fan blade, the ratio of the torsion angle of the first fan blade to the torsion angle of the second fan blade, and the ratio of the rotating speed of the first fan blade to the rotating speed of the second fan blade, wherein the ratio of the rotating speed of the first fan blade to the rotating speed of the second fan blade is->The method comprises the steps of carrying out a first treatment on the surface of the Then a first coefficient of difference
And->；
The fan further comprises an electric control plate, and the motor is electrically connected with the electric control plate; the electric control board comprises a speed regulating module for regulating the rotating speed of the motor and a direction regulating module for regulating the steering of the motor.
2. The fan of claim 1 wherein said reversing wheel set is a gear set and said drive wheel set is engaged with said drive wheel and said output wheel, respectively.
3. The fan of claim 2, wherein the drive wheel set further comprises: the transmission wheel set comprises a first rotating shaft and a second rotating shaft, and the first rotating shaft is connected with the first gear; the driving wheel is meshed with the first gear and is arranged on one side of the mounting plate; the third gear is meshed with the second gear and the output wheel respectively, and the second gear, the third gear and the output wheel are mounted on the other side of the mounting plate.
4. The fan of claim 1 wherein the first coefficient of difference
。
5. The fan of claim 1 wherein the ratio of the rotational speed of the first fan blade to the rotational speed of the second fan blade
。
6. The fan of claim 1 wherein the total blade area of the first fan blade isThe total area of the blades of the second fan blade is +.>The method comprises the steps of carrying out a first treatment on the surface of the Defining a second difference coefficient as the product of the ratio of the total area of the first fan blade to the total area of the second fan blade and the first difference coefficient, and then the second difference coefficient
And->。
7. The fan of claim 6 wherein said first fan blade has a blade length ofThe length of the second fan blade is +.>The method comprises the steps of carrying out a first treatment on the surface of the Then
。
8. The fan as claimed in claim 6, wherein the first blade and the second blade have a pitch L,。
9. the fan of claim 1, further comprising a third blade mounted to the first shaft.
10. The fan of claim 9, wherein the third blade is disposed outside of the first blade, and wherein a blade length of the third blade is less than a blade length of the first blade.
11. The fan as claimed in any one of claims 1 to 10, further comprising a fourth fan blade mounted to the second rotation shaft.
12. The fan of claim 11, wherein the fourth blade is disposed between the first blade and the second blade, and wherein a blade length of the fourth blade is less than a blade length of the second blade.
CN201810749399.1A 2018-07-09 2018-07-09 Fan with fan body Active CN108999798B (en)

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Publication number Priority date Publication date Assignee Title
CN211314589U (en) * 2019-08-30 2020-08-21 青岛乐家电器有限公司 Double-layer fan blade assembly and fan comprising same

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009191760A (en) * 2008-02-15 2009-08-27 Denso Corp Blower for vehicle
JP2009250190A (en) * 2008-04-10 2009-10-29 Panasonic Corp Ceiling fan
KR20130107442A (en) * 2012-03-22 2013-10-02 한라비스테온공조 주식회사 Axial flow fan
JP2014171740A (en) * 2013-03-11 2014-09-22 Koizumi Seiki Corp Double fan type hair dryer
CN104235065A (en) * 2013-06-07 2014-12-24 日本电产株式会社 Serial axial fan
CN105221452A (en) * 2015-09-29 2016-01-06 小米科技有限责任公司 Air cleaner and blast device thereof
CN106968973A (en) * 2017-05-09 2017-07-21 美的集团股份有限公司 Axial flow blower
CN107288912A (en) * 2017-07-31 2017-10-24 广东美的环境电器制造有限公司 A kind of fan
CN107401519A (en) * 2017-09-08 2017-11-28 四川弘毅智慧知识产权运营有限公司 A kind of three-dimensional Double-faced fan of combined type driving
CN207229425U (en) * 2017-08-25 2018-04-13 宁波宝工电器有限公司 Double blade motor components
CN208778285U (en) * 2018-07-09 2019-04-23 广东美的环境电器制造有限公司 Fan

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9017038B2 (en) * 2009-08-10 2015-04-28 Cornerstone Research Group, Inc. Variable performance vaneaxial fan with high efficiency

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009191760A (en) * 2008-02-15 2009-08-27 Denso Corp Blower for vehicle
JP2009250190A (en) * 2008-04-10 2009-10-29 Panasonic Corp Ceiling fan
KR20130107442A (en) * 2012-03-22 2013-10-02 한라비스테온공조 주식회사 Axial flow fan
JP2014171740A (en) * 2013-03-11 2014-09-22 Koizumi Seiki Corp Double fan type hair dryer
CN104235065A (en) * 2013-06-07 2014-12-24 日本电产株式会社 Serial axial fan
CN105221452A (en) * 2015-09-29 2016-01-06 小米科技有限责任公司 Air cleaner and blast device thereof
CN106968973A (en) * 2017-05-09 2017-07-21 美的集团股份有限公司 Axial flow blower
CN107288912A (en) * 2017-07-31 2017-10-24 广东美的环境电器制造有限公司 A kind of fan
CN207229425U (en) * 2017-08-25 2018-04-13 宁波宝工电器有限公司 Double blade motor components
CN107401519A (en) * 2017-09-08 2017-11-28 四川弘毅智慧知识产权运营有限公司 A kind of three-dimensional Double-faced fan of combined type driving
CN208778285U (en) * 2018-07-09 2019-04-23 广东美的环境电器制造有限公司 Fan

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