CN108869356B - Fan with cooling device - Google Patents
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- CN108869356B CN108869356B CN201810749397.2A CN201810749397A CN108869356B CN 108869356 B CN108869356 B CN 108869356B CN 201810749397 A CN201810749397 A CN 201810749397A CN 108869356 B CN108869356 B CN 108869356B
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- 238000001816 cooling Methods 0.000 title description 2
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000000694 effects Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 241000219094 Vitaceae Species 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 235000021021 grapes Nutrition 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241001075561 Fioria Species 0.000 description 1
- 241000219095 Vitis Species 0.000 description 1
- 235000009754 Vitis X bourquina Nutrition 0.000 description 1
- 235000012333 Vitis X labruscana Nutrition 0.000 description 1
- 235000014787 Vitis vinifera Nutrition 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- 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
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- 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
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- 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
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- 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
- F04D29/34—Blade mountings
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- 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
Abstract
The invention discloses a fan, which comprises a machine head assembly and a supporting assembly, wherein the supporting assembly comprises a base and a supporting rod; the machine head assembly comprises a support, a motor mounting frame, a first motor and a second motor; the bracket is arranged at the top of the supporting rod and can rotate around the axis of the supporting rod; the motor mounting frame is mounted on the bracket and can be turned over in the vertical direction relative to the bracket, and a motor mounting seat is arranged in the middle of the motor mounting frame; the first motor is arranged on the front side of the motor mounting seat and provided with a first rotating shaft, and a first fan blade is arranged on the first rotating shaft; the second motor is arranged on the rear side of the motor mounting seat and is provided with a second rotating shaft, and a second fan blade is arranged on the second rotating shaft; the first fan blade and the second fan blade are opposite in torsion direction. The technical scheme of the invention can realize three-dimensional omnidirectional air outlet.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a fan.
Background
Electric fans can be classified into ceiling fans, table fans, floor fans, wall fans, ventilation fans, air conditioning fans and the like according to different functions and forms; the fan can be divided into axial flow fan, cross flow fan, centrifugal fan, cross flow fan and the like according to different air inlet and outlet modes. Wherein, domestic desk fan and floor fan are mostly axial-flow fan, and domestic desk fan and floor fan amount of wind are less under the normal conditions, and the amount of wind is slightly bigger relatively when high gear, but can produce great noise when high-grade position amount of wind is big, and service environment is more usually indoor, and the influence of noise can be bigger. In addition, the conventional electric fan has a small air supply range, and can only realize intermittent air supply in a fan-shaped area even if the fan is started for oscillating air supply, so that the requirement of large-range air supply or remote air supply cannot be met.
Disclosure of Invention
The invention mainly aims to provide a fan, and aims to solve the problem that the existing fan cannot realize large-range air supply.
In order to achieve the purpose, the fan provided by the invention comprises a machine head assembly and a supporting assembly, wherein the supporting assembly comprises a base and a supporting rod; the machine head assembly comprises a support, a motor mounting frame, a first motor and a second motor; the bracket is arranged at the top of the supporting rod and can rotate around the axis of the supporting rod; the motor mounting frame is mounted on the bracket and can be turned over in the vertical direction relative to the bracket, and a motor mounting seat is arranged in the middle of the motor mounting frame; the first motor is arranged on the front side of the motor mounting seat and provided with a first rotating shaft, and a first fan blade is arranged on the first rotating shaft; the second motor is arranged on the rear side of the motor mounting seat and is provided with a second rotating shaft, and a second fan blade is arranged on the second rotating shaft; the first fan blade and the second fan blade are opposite in torsion direction.
Preferably, the fan further comprises an electric control board, the electric control board is electrically connected with the first motor and the second motor and controls the first motor and the second motor to rotate relatively; the electric control board comprises a rotating speed ratio adjusting module, a gear adjusting module and a steering adjusting module.
Preferably, the rotation speed ratio adjustment module adjusts and controls the rotation speed ω of the first electric machine1And the rotational speed ω of the second electric machine2Ratio of (A to B)
Preferably, the gear adjustment module comprises an editor and a memory for editing the gear; the gear adjusting module further comprises a plurality of preset gear selecting keys and at least one user-defined gear selecting key.
Preferably, the steering adjusting module is configured to synchronously switch the rotation directions of the first motor and the second motor; the steering adjustment module includes a protection switch to switch off the steering adjustment module when the first and second motors are operating.
Preferably, the bracket is provided with a first driving mechanism for driving the motor mounting frame to turn over up and down, and the first driving mechanism is electrically connected with the electric control board.
Preferably, the support rod is provided with a second driving mechanism for driving the support to rotate left and right, and the second driving mechanism is electrically connected with the electric control board.
Preferably, the motor mounting frame is clamped and mounted at two ends of the support, and the two ends of the support are provided with rotary positioning pieces for positioning the motor mounting frame.
Preferably, the number of the first fan blades is n1The number of the blades of the second fan blade is n2(ii) a The torsion angle of the first fan blade is theta1The torsion angle of the second fan blade is theta2(ii) a Defining the product of the ratio of the number of the blades of the first fan blade to the number of the blades of the second fan blade and the ratio of the torsional angle of the first fan blade to the torsional angle of the second fan blade as a first difference coefficient, and determining the first difference coefficient
The first difference coefficient k1∈[0.7,1.2]。
Preference is given toThe length of the first fan blade is l1Area is S1The length of the blade of the second fan blade is l2Area is S2(ii) a Defining the product of the ratio of the blade area of the first fan blade to the blade length of the first fan blade and the ratio of the blade area of the second fan blade to the blade length of the second fan blade as a second difference coefficient, and determining the second difference coefficient
The second difference coefficient k2∈[0.8,1.2]。
Preferably, the fan further comprises a third blade, and the third blade is mounted on the first rotating shaft.
Preferably, the third fan blade is arranged on 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 blade, and the fourth blade is mounted on the second rotating shaft.
Preferably, the fourth fan blade is arranged 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, double motors are adopted to carry out opposite-rotation and same-direction air outlet, and the motor mounting frame capable of turning up and down and the support capable of rotating left and right are arranged, so that the air outlet direction range can realize three-dimensional and omnidirectional air outlet by taking the machine head assembly as the center.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of an overall structure of a fan according to an embodiment of the present invention;
FIG. 2 is an exploded view of an embodiment of the fan of the present invention;
FIG. 3 is a schematic structural diagram of a motor and a fan blade according to an embodiment of the present invention;
FIG. 4 is a schematic view of a bracket of a handpiece according to an embodiment of the fan of the present invention;
FIG. 5 is a partial enlarged view of the area A in FIG. 4
FIG. 6 is a schematic view of a blade structure in another embodiment of a fan according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
141 | Second |
| 110 | |
142 | |
| 120 | |
150 | Rotary positioning sheet |
| 121 | |
200 | |
| 130 | |
210 | |
| 131 | First rotating |
220 | |
| 132 | |
300 | |
| 140 | Second |
400 | Fourth fan blade |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a fan.
The household floor fan, the desk fan, the fan leaf and other equivalent current fans adopt that a motor drives the blade of the slope of fixing on the motor shaft to rotate, thereby the air towards the axial driven air-out mode of motor, this kind of fan simple structure, the air-out mode is direct, the application is most common, but the air that the blade of this kind of fan directly promoted has along axial momentum in addition, still have because of blade and air friction make gaseous and the perpendicular momentum of pivot that produces, wherein, the momentum with pivot perpendicular air current can make the air current expand and scatter, the cross section of air current bundle increases after the air current scatters, the resistance that receives when along axial motion sharply increases, it is nearer to lead to axial effective air supply distance, especially when the fan shakes the head and swings the wind, axial effective air supply distance is nearer than the air supply distance when single direction goes out the wind.
The air quantity typhoon speed detection test is carried out by taking the American FS40-12DR floor fan as a target, and the maximum air outlet speed of the American FS40-12DR is about 4m/s basically the same as that of other floor fans. Open the fan, transfer to the highest gear, place the different distance departments in fan axis the place ahead with amount of wind platform, detect the wind speed, data as follows:
from experimental data, the fan attenuation is nonlinear attenuation, the higher the speed is, the faster the attenuation is, and the attenuation is 1.65m/s at 3m, and the wind speed required by the human body to feel windy is about 1.6 m/s.
From the above test data, it can be concluded that the effective air supply distance of the common floor fan is about 3m, which is consistent with the experience in daily use.
In general, an effective blowing distance of 3m can meet the requirements of most application scenarios, but the noise generated when a flow fan such as a floor fan is turned on to a high position is large. A gear and noise comparison test is also carried out with a American FS40-12DR (the higher the gear is, the higher the air outlet speed is). The American FS40-12DR has better mechanical noise control in similar products, and almost no noise generated by mechanical vibration or friction of parts in operation, so the detected noise can be considered to be all caused by the noise generated when the fan blades blow airflow. FS40-12DR has three gears, detects the noise level that each gear corresponds at two meters away from the fan, and the data is as follows:
| |
1 | 2 | 3 |
| Noise (decibel) | 36.3 | 43.2 | 53.8 |
Daytime noise exceeds 50 db, and nighttime noise exceeds 45 db, which can interfere with normal sleep and rest. According to the sound environment quality standard, the requirements of class 0 sound environment areas (such as rehabilitation areas and the like which need to be quiet in particular) are that the noise in the daytime is not more than 50 decibels, and the noise at night is not more than 40 decibels; the requirement of the type 1 sound environment area (which is an area with main functions of residential housing, medical health, cultural education, scientific research design and administrative office and needs to be kept quiet) is that the noise in the daytime is not more than 55 decibels and the noise at night is not more than 45 decibels.
Therefore, when the conventional floor fan is used at night, the noise generated under the condition of the maximum gear can obviously influence sleep and rest. Even in daytime, the noise generated by transmission under the condition of the maximum gear does not meet the requirement of the class-0 sound environment area.
Therefore, the conventional floor fan with a single motor and a single fan blade structure cannot ensure sufficient effective air supply distance on the premise of keeping sufficient silence. Meanwhile, the conventional floor fan cannot meet the air supply requirements of a large space, such as a scene with requirements of a large living room and the like.
In some special application scenarios, for example, in a bedroom with a small area for supplying air to an infant or an elderly person, a soft wind that disperses an airflow as quickly as possible is required instead of a large effective air supply distance, so as to avoid a large wind speed from directly blowing the body of the infant or the elderly person. At present, people usually face a fan to a wall, and the aim of quickly dispersing air flow is achieved by utilizing the recoil action of the wall to the air flow, but the aim cannot be achieved by directly adjusting the fan.
In addition, the fan is used for supplying air for people and has other functional applications, such as ventilation, and special situations exist, such as the fan is used for enabling air to be convected so as to achieve the purpose of accelerating the drying of the dried grapes to be dried, particularly, when the dried grapes are dried, a porous wall of a drying room can provide better conditions for indoor and outdoor air flow, but the conventional drying method of drying the grapes by natural wind is long in time consumption, and the conventional exhaust fan has little influence on the air flow velocity around the grapes and cannot directly act on the grape bunch hung in the room.
Therefore, the invention provides the fan which has a larger air outlet range and can meet the requirement of multi-scene application. The fan provided by the invention adopts the two motors to respectively and independently control the two fan blades to rotate reversely, and the inclination directions of the two fan blades are opposite, so that the air outlet directions of the two fan blades are the same when the two fan blades rotate reversely, and the air outlet of the fan provided by the invention can also rotate up and down by 360 degrees on the premise of rotating left and right.
Specifically, referring to fig. 1 to 3, in the embodiment of the present invention, the fan includes a handpiece assembly 100 and a support assembly 200, wherein the support assembly 200 includes a base 210 and a support rod; the handpiece assembly 100 comprises a bracket 110, a motor mounting frame 120, a first motor 130 and a second motor 140; the bracket 110 is mounted on the top of the support rod and can rotate around the axis of the support rod; the motor mounting frame 120 is mounted on the bracket 110 and can be turned over in the vertical direction relative to the bracket 110, and a motor mounting seat 121 is arranged in the middle of the motor mounting frame 120; the first motor 130 is mounted on the front side of the motor mounting seat 121, the first motor 130 has a first rotating shaft 131, and a first fan blade 132 is mounted on the first rotating shaft 131; the second motor 140 is mounted at the rear side of the motor mounting seat 121, the second motor 140 has a second rotating shaft 141, and a second fan blade 142 is mounted on the second rotating shaft 141; the first blade 132 and the second blade 142 are opposite in torsion direction.
The fan of the present invention further includes an electric control board, which is connected to the first motor 130 and the second motor 140 and controls the first motor 130 and the second motor 140 to rotate relatively. The first motor 130 drives the first rotating shaft 131 to rotate so as to drive the first fan blade 132 to rotate; similarly, the second motor 140 drives the second rotating shaft 141 to rotate so as to drive the second fan 142 to rotate. The first motor 130 and the second motor 140 are electrically connected to an electric control board, which individually controls the rotation direction and the rotation speed of the first motor 130 and the second motor 140, respectively, such that the rotation directions of the first motor 130 and the second motor 140 are opposite.
The double motors can lead the air to be subjected to the driving action of axial superposition and the driving action of radial mutual offset by oppositely rotating and equidirectionally air-out, thereby reducing the disturbance of the air flow when the air flow moves axially and leading the air flow to move forwards stably. When the rotating speeds of the two fan blades are not greatly different, compared with the air outlet of a single fan blade, the air flow gathering effect is obvious, and the air flow can be conveyed to a longer distance. The difference between the rotational speeds of the two blades will cause the difference between the air outlet effects of the fan, and the influence of the rotational speed ratio of the first blade 132 and the second blade 142 on the air outlet volume and the effective air supply distance of the fan will be described in detail below.
The electric control board comprises a rotating speed ratio adjusting module, a gear adjusting module and a steering adjusting module; the rotation speed ratio adjusting module is configured to adjust and fix a ratio of rotation speeds of the first motor 130 and the second motor 140, the gear adjusting module is configured to synchronously adjust the rotation speeds of the first motor 130 and the second motor 140, and the steering adjusting module is configured to switch rotation directions of the first motor 130 and the second motor 140. Defining the rotational speed of the first electric machine 130 as ω1The rotation speed of the second motor 140 is ω2Then the speed ratio adjusting module controls
Is in the range of 0.75 to 1.33. When the first motor 130 is an air outlet motor,
the range of values of (1) to (1.33), when the first motor 130 is an intake motor,
value range ofFrom 0.75 to 1. The steering adjusting module has two adjusting modes, wherein one adjusting mode is a forward rotating mode, the other adjusting mode is a reverse rotating mode, the fan discharges air in a forward direction in the forward rotating mode, and the fan discharges air in a reverse direction in the reverse rotating mode; the steering adjusting module comprises an adjusting switch and a protection switch, wherein the protection switch is used for switching off the steering adjusting module when the fan works and preventing the first motor 130 and the second motor 140 from being damaged due to reverse direction in work when the steering adjusting switch is triggered when the fan works; the turning adjusting switch is used for switching the power supply modes of the first motor 130 and the second motor 140 when the fan stops working so as to control the fan to wind forward or backward. The protection switch is a normally closed switch, and when the fan works, the protection switch is opened to cut off the power supply of the steering adjusting module; when the fan is powered on and does not work, the protection switch is closed, and the steering adjusting module can work normally.
The double motors respectively drive the double fan blades to rotate to finish air outlet together, and under the condition that the two fan blades are the same, the air outlet mode depends on the rotating speed ratio of the two motors. Taking the air outlet at one side of the first fan blade 132 of the fan as an example for explanation, keeping the total output power of the first motor 130 and the second motor 140 constant, adjusting the rotation speed ratio of the first motor 130 and the second motor 140, and testing the total air outlet amount and the effective air supply distance, the results are as follows:
from the above experimental data, it can be seen that the rotation speed ratio between the first motor 130200 and the second motor 140300 is set
When the air is blown out, the air outlet quantity and the effective air supply distance are both larger; when in use
When the air is blown out, the speed of reducing the air output is reduced, and the speed of reducing the effective air supply distance is also reduced; in that
When the value of (b) is between 0.7 and 0.9, the effective air supply distance and the air output are greatly attenuated
And meanwhile, the attenuation of the air output and the effective air supply distance is obviously reduced.
To pair
The range of the ratio is enlarged, the air outlet mode of the fan is further researched, and part of data are as follows:
from the above experiments, it can be concluded that
In the meantime, the air output is hardly reduced with the increase of the ratio. The air output and the effective air supply distance of the single motor fan with the same power are 690m respectively3H and 4m, the air outlet quantity and the effective air supply distance of the double fan blades are both close to those of the single fan blade under the power, namely after the rotating speed ratio of the first motor 130 to the second motor 140 is more than 2.1, the air outlet quantity and the effective air supply distance of the double fan blades in contrarotation are no longer obviously superior to those of the single fan blade.
Combining the previous group of experimental data, under the condition of obtaining larger air output and effective air supply distance,
should not be greater than 2.1 and should not be less than 0.7; to pair
The values were refined based on two values, 0.7 and 2.1, and the test was repeated with the following data:
from the above data, it can be seen that
When the value of (2) is between 0.8 and 2.0, the air output is larger and the effective air supply distance is longer. In this embodiment, the rotation directions of the first and second motors 140 may be opposite, that is, the air may be discharged from one side of the second motor 140, so that, to obtain a larger air output and a longer effective air supply distance, the rotation speed ratio of the first motor 130 to the second motor 140 preferably takes a value within a range of [0.5, 2 ]]。
When the difference between the rotation speeds of the first motor 130 and the second motor 140 is large, the effective air supply distance is short, and the divergence angle of the outlet air is large. According to the above experimental data sets, the relationship between the difference of the rotation speed ratio between the first motor 130 and the second motor 140 and the divergence angle of the outlet air is quantitatively studied by taking the outlet air at the first motor 130 as an example. Part of the data are as follows:
because the air outlet flow has no obvious boundary and the requirement on the accuracy of the air outlet parameters of the soft wind mode is not high, the edge area with the flow velocity not less than 1m/s at a position 1m away from the air outlet fan blade is used as the boundary for defining, and the divisor is taken to obtain the divergence angle data.
From the above data, when
When the value of (2) is between 0.8 and 1.3, the divergence angle of the air outlet is less than 45 degrees, and the air outlet gathering effect is good.
To pair
The values of (A) and (B) are subjected to detailed research, and the results show that
When the value of (1) is between 0.75 and 1.33, the divergent angle of the outlet air is less than 45 degrees. When ω is1Less than omega2In the meantime, the noise is relatively large, and thus when the first motor 130 is an air outlet motor, the air outlet effect and the noise are controlled to be relatively good and relatively low
The common fan usually presets three gears, the fan of the invention can also presets the gears, specifically, the gear adjusting module in the embodiment comprises an editor and a memory, wherein the editor can edit the gears; the gear adjusting module further comprises a plurality of preset gear selecting keys and at least one user-defined gear selecting key. The fan can realize different air outlet modes, so that the preset gears comprise the gears of the air outlet modes besides the conventional gear for controlling the air speed, for example, the preset gears comprise a soft wind mode gear and a straight wind mode gear. In addition, a user can use a gear editor to set a user-defined gear, the editable content comprises total output power and a rotating speed ratio, the edited content is stored in a memory and is associated with a user-defined gear selection key, and the user-defined air outlet mode is directly called and selected.
The blades of the fan comprise plane blades and cambered surface blades, and it should be noted that when the plane blades are adopted, the rotation direction of the motor is changed through the rotation direction adjusting module, the air outlet direction is opposite, and the rotating speed ratio of the first fan blade 132 to the second fan blade 142 is opposite
The influence on the air outlet effect is not directly applicable to the above contents, and the rotation speed ratio of the second fan blades 142 to the first fan blades 132 needs to be replaced by the inverted rotation speed ratio
When cambered surface blades are adopted, the motor steering is changed through the steering adjusting module, the air outlet direction is opposite, the air outlet effect is different from that of the plane blades, the air outlet capacity is improved when the front side is exhausted, and the air outlet capacity is improved when the back side is exhaustedReduced, otherwise consistent with the foregoing.
The motor mounting frame 120 of the present invention is annular and is used for mounting the first motor 130 and the second motor 140, and the front and rear mesh covers of the fan are also mounted on the motor mounting frame 120. Two symmetrical connecting shafts are arranged on the side of the motor mounting frame 120 and are mounted on the bracket 110 through the two connecting shafts, wherein one connecting shaft is provided with a through hole, and the electric wire passes through the through hole of the connecting shaft and extends into the motor mounting frame 120 and is connected with the first motor 130 and the second motor 140. The bracket 110 is provided with a shaft hole for mounting the connecting shaft, and the motor mounting frame 120 can rotate around two rotating shafts after being mounted on the bracket 110, so that the first motor 130 and the second motor 140 can be driven by the motor mounting frame 120 to turn over up and down. And the electric wire is inserted through the through hole on the rotating shaft, and the situation of winding and wire clamping can not occur when the motor mounting frame 120 is turned over up and down, so that the turning angle can reach 360 degrees. The fan of the present invention further comprises a support assembly, wherein the support assembly 200 comprises a base plate and a support column 220, the lower end of the support column 220 is mounted on the base plate, and the upper end is connected with the bracket 110. A hollow member is provided at the upper end of the support column 220, and a connection rod inserted into the hollow member at the upper end of the support column 220 is provided at the lower end of the bracket 110.
The bracket 110 is provided with a first driving mechanism for driving the motor mounting frame 120 to turn up and down, and the first driving mechanism is electrically connected with the electric control board so as to rotate up and down under the control of the electric control board; similarly, the first driving mechanism may be disposed on the motor mounting frame 120, for example, one of the connecting shafts may be used as a driving shaft of the first driving mechanism to drive the motor mounting frame 120 to rotate relative to the bracket 110. The support rod or the connecting rod is provided with a second driving mechanism for driving the support 110 to rotate left and right, and the second driving mechanism is electrically connected with the electric control board so as to drive the support 110 to rotate left and right by taking the support rod as an axis under the control of the electric control board.
In addition, in other embodiments, referring to fig. 4 and 5, the first driving mechanism may be omitted, a rotation positioning plate 150 is disposed between the motor mounting frame 120 and the bracket 110, the rotation positioning plate 150 is provided with a central hole for the connecting shaft to pass through and positioning holes distributed around the central hole, the motor mounting frame 120 is clamped and mounted at two ends of the bracket 110, and positioning balls adapted to the positioning holes are disposed at the connecting shaft of the motor mounting frame 120 or at two ends of the bracket 110. The motor mounting frame 120 can be adjusted in the vertical air outlet direction in a manual mode, and after the direction is adjusted in place, the positioning balls clamp the positioning holes to position the motor mounting frame 120.
According to the technical scheme, the motors which rotate in opposite directions are adopted to drive the first fan blade 132 and the second fan blade 142 with opposite blade torsion directions to drive air to be blown out along the axial direction, the electric control plate is used for controlling the rotating speeds of the first motor 130 and the second motor 140 to be within a certain ratio range, momentum of airflow perpendicular to the axial direction of the motors can be mutually offset, so that the airflow is gathered, the air outlet quantity is larger, the air supply distance is longer, the rotating speeds of the first motor 130 and the second motor 140 can be reduced on the premise of meeting the requirement of a certain air supply distance, and the noise of the fan during working is further reduced. The rotating speed ratio of the first motor 130 and the second motor 140 is adjusted through a rotating speed ratio adjusting module of the electric control board, so that the fan has the function of gradually supplying air from a soft air outlet function of quickly dispersing air flow to a long-distance air supply function of gathering air flow; the air-out mode that can edit the gear through editor and the memory of editable gear, can edit the storage with the air-out mode that the user often used to regard it as self-defined gear and self-defined gear key to be correlated with, can a key selection after setting up and need not carry out the repeated setting when using at every turn. The motor mounting frame 120 is turned over up and down through the first driving mechanism, and the support 110 is rotated left and right through the second driving mechanism, so that three-dimensional omnidirectional air outlet with the head assembly 100 as the center can be realized, and air supply requirements of various situations can be met.
The number n of the first fan blade 132 is not only the rotation speed ratio of the two motors of the fan will affect the air outlet effect1The number n of the second fan blades 1422The torsion angle theta of the first fan blade 1321The torsion angle theta of the second fan blade 1422The values and the relationship between them will also affect the air-out effect. The air outlet energy of the fan is influenced by more influencing factorsWhen the force is difficult to calculate specifically, how to combine the relationship of the influencing factors to realize the optimal design faces the difficulties of theory and experiment.
Therefore, the product of the ratio of the number of the first fan blades 132 to the number of the second fan blades 142 and the ratio of the torsion angle of the first fan blades 132 to the torsion angle of the second fan blades 142 is defined as a first difference coefficient between the first fan blades 132 and the second fan blades 142; a product of a ratio of the blade area of the first fan blade 132 to the blade length of the first fan blade 132 and a ratio of the blade area of the second fan blade 142 to the blade length of the second fan blade 142 is defined as a second difference coefficient. The first difference coefficient
Second coefficient of difference
The first difference coefficient is the ratio of the air outlet capacities of the first fan blade 132 and the second fan blade 142 when the shape, the area, the length, the width and other conditions of the blades are fixed; the second difference coefficient is a ratio of the air outlet capacity of the first fan blade 132 to the air outlet capacity of the second fan blade 142 when the number of the first fan blade, the number of the second fan blade, the twist angle of the first fan blade, the width of the second fan blade, and other conditions are fixed.
For different k, with constant total output power and other conditions of the blade being equal1The fan with the value is subjected to a grouping test of air outlet capacity, and the result is as follows:
| k1 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 | 1.3 |
| air output (m)3/h) | 522 | 705 | 850 | 950 | 986 | 988 | 970 | 945 | 830 |
| Distance of air supply (m) | 3.2 | 4.5 | 5.4 | 7.2 | 8.7 | 8.2 | 7.5 | 6.2 | 5.0 |
From the above data, it can be seen that at k1∈[0.7,1.2]In the process, the air output and the air supply distance of the fan are both in a better range.
For different k, with constant total output power and other conditions of the blade being equal2The fan with the value is subjected to a grouping test of air outlet capacity, and the result is as follows:
| k2 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 |
| air output (m)3/h) | 615 | 745 | 851 | 876 | 869 | 860 | 845 | 751 | 683 |
| Distance of air supply (m) | 4.2 | 5.0 | 6.2 | 7.7 | 7.4 | 7.0 | 6.2 | 5.5 | 4.8 |
As can be seen from the data, the optimal interval between the air output and the air supply distance of the fan is k2∈[0.8,1.2]。
By combining the rotation speed ratio of the first motor 130 and the second motor 140, the first difference coefficient and the second difference coefficient, it is easy to obtain the ratio of the parameter setting of the fan blade and the motor rotation speed when the fan obtains better air outlet capacity.
The embodiment is a specific embodiment of the fan adopting double blades, and in order to further improve the air supply distance of the fan, the invention also provides another embodiment on the basis of the double blades.
Referring to fig. 6, the fan of the present embodiment further includes a third blade 300, and the third blade 300 is added to further perform rectification adjustment on the basis of the double-blade counter-rotating air-out, so as to increase the farthest air-supplying distance. Specifically, the third fan blade 300 is mounted on the first rotating shaft 131; the third fan blade 300 is disposed on the other side of the first fan blade 132 opposite to the second fan blade 142, and the length of the third fan blade 300 is smaller than that of the first fan blade 132.
The fan blades can change the flow speed and the flow direction of the airflow, the airflow can be adjusted for the second time when two groups of fan blades are adopted, and the purpose of manually adjusting the air outlet effect is achieved by specifically setting and adjusting the two groups of fan blades. The air flow is obstructed by the surrounding air, so that the boundary of the air flow has large instability. The air flow can be divided into an air flow beam central area and an air flow beam boundary area equivalently, and in contrast, the flow velocity of the air flow beam central area 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 that the rectification fan blades are added on the basis of the double fan blades.
The third blade 300 is a rectifying blade, which is mainly used to adjust the area ratio and flow velocity of the central area of the airflow beam, and obtain a farther air supply distance by adjusting the range and ratio of the central area and the boundary area of the airflow beam under the condition that the total power is not changed.
On this basis, in order to improve the stability of the fan during operation and further improve the rectification capability of the rectification blade, the present invention provides another embodiment, in which the fan further includes a fourth blade 400, and the fourth blade 400 is installed on the second rotating shaft 141 and is disposed between the first blade 132 and the second blade 142. Similarly, the length of the fourth blade 400 is smaller than that of the second blade 142. It should be noted that the third fan blade 300 or the fourth fan blade 400 may be adopted as the rectifying fan blade, or the third fan blade 300 and the fourth fan blade 400 may be provided at the same time.
The rectification fan blade is matched with the first fan blade 132 and the second fan blade 142, so that the adjustability of the air flow is stronger, the rectification fan blade has an additional driving function on the air flow, the additional driving function is concentrated in the central area of the air flow bundle, and the area proportion and the flow rate proportion of the central area and the boundary area of the air flow bundle generated by the fan can be adjusted, so that the farther air outlet distance is obtained.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (14)
1. A fan is characterized by comprising a machine head component and a supporting component,
the supporting component comprises a base and a supporting rod;
the handpiece assembly includes:
the bracket is arranged at the top of the supporting rod and can rotate around the axis of the supporting rod;
the motor mounting frame is mounted on the bracket and can be turned over in the vertical direction relative to the bracket; the middle part of the motor mounting frame is provided with a motor mounting seat;
the first motor is arranged on the front side of the motor mounting seat and provided with a first rotating shaft, and a first fan blade is arranged on the first rotating shaft;
the second motor is arranged on the other rear side of the motor mounting seat and is provided with a second rotating shaft, a second fan blade is arranged on the second rotating shaft, and the torsion direction of the second fan blade is opposite to that of the first fan blade;
the number of the blades of the first fan blade is n1The number of the blades of the second fan blade is n2(ii) a The torsion angle of the first fan blade is theta1The torsion angle of the second fan blade is theta2(ii) a Defining the product of the ratio of the number of the blades of the first fan blade to the number of the blades of the second fan blade and the ratio of the torsional angle of the first fan blade to the torsional angle of the second fan blade as a first difference coefficient, and determining the first difference coefficient
The first difference coefficient k1∈[0.9,1)。
2. The fan of claim 1, further comprising an electronic control board electrically connecting the first motor and the second motor and controlling the first motor and the second motor to rotate relatively; the electric control board comprises a rotating speed ratio adjusting module, a gear adjusting module and a steering adjusting module.
3. The fan of claim 2 wherein the speed ratio adjustment module adjusts and controls a speed ω of the first motor1And the rotational speed ω of the second electric machine2Ratio of (A to B)
4. The fan of claim 2, wherein the range adjustment module includes an editor and a memory for editable ranges; the gear adjusting module further comprises a plurality of preset gear selecting keys and at least one user-defined gear selecting key.
5. The fan of claim 2, wherein the steering adjustment module is configured to synchronously switch rotational directions of the first motor and the second motor; the steering adjustment module includes a protection switch to switch off the steering adjustment module when the first and second motors are operating.
6. The fan as claimed in claim 2, wherein the bracket is provided with a first driving mechanism for driving the motor mounting frame to be turned upside down, and the first driving mechanism is electrically connected to the electric control board.
7. The fan as claimed in claim 2, wherein the support bar is provided with a second driving mechanism for driving the bracket to rotate left and right, and the second driving mechanism is electrically connected with the electric control board.
8. The fan as claimed in claim 1, wherein the motor mounting frame is clamped and mounted at both ends of the bracket, and rotation positioning pieces for positioning the motor mounting frame are provided at both ends of the bracket.
9. The fan as claimed in claim 1, wherein the first coefficient of difference k1＝0.9。
10. The fan as claimed in claim 1, wherein the first blade has a blade length of l1Area is S1The length of the blade of the second fan blade is l2Area is S2(ii) a Defining the product of the ratio of the blade area of the first fan blade to the blade length of the first fan blade and the ratio of the blade area of the second fan blade to the blade length of the second fan blade as a second difference coefficient, and determining the second difference coefficient
The second difference coefficient k2∈[0.8，1.2]。
11. The fan as claimed in claim 1, further comprising a third blade, wherein the third blade is mounted to the first shaft.
12. The fan as claimed in claim 11, wherein the third blade is disposed outside the first blade, and the length of the third blade is smaller than that of the first blade.
13. The fan as claimed in any one of claims 1 to 12, further comprising a fourth blade, wherein the fourth blade is mounted to the second shaft.
14. The fan as claimed in claim 13, wherein the fourth blade is disposed between the first blade and the second blade, and the length of the fourth blade is smaller than that of the second blade.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810749397.2A CN108869356B (en) | 2018-07-09 | 2018-07-09 | Fan with cooling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810749397.2A CN108869356B (en) | 2018-07-09 | 2018-07-09 | Fan with cooling device |
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| CN108869356A CN108869356A (en) | 2018-11-23 |
| CN108869356B true CN108869356B (en) | 2021-07-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111692717B (en) * | 2019-03-12 | 2022-03-01 | 广东美的制冷设备有限公司 | Operation control method, operation control device, air conditioner, and storage medium |
| CN110566475A (en) * | 2019-09-16 | 2019-12-13 | 续客商城（深圳）有限公司 | air outlet device and fan |
| CN114704486A (en) * | 2022-03-30 | 2022-07-05 | 武汉市江楚开物科技有限公司 | Fan with multi-directional air outlet |
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| CN104235065A (en) * | 2013-06-07 | 2014-12-24 | 日本电产株式会社 | Serial axial fan |
| CN206309618U (en) * | 2016-12-09 | 2017-07-07 | 杭州微光电子股份有限公司 | Double-vane fan |
| CN106968973A (en) * | 2017-05-09 | 2017-07-21 | 美的集团股份有限公司 | Axial flow blower |
| CN207212730U (en) * | 2017-09-15 | 2018-04-10 | 中山市春凯电器有限公司 | A kind of vertical fan |
| CN207229425U (en) * | 2017-08-25 | 2018-04-13 | 宁波宝工电器有限公司 | Double blade motor components |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104235065A (en) * | 2013-06-07 | 2014-12-24 | 日本电产株式会社 | Serial axial fan |
| CN206309618U (en) * | 2016-12-09 | 2017-07-07 | 杭州微光电子股份有限公司 | Double-vane fan |
| CN106968973A (en) * | 2017-05-09 | 2017-07-21 | 美的集团股份有限公司 | Axial flow blower |
| CN207229425U (en) * | 2017-08-25 | 2018-04-13 | 宁波宝工电器有限公司 | Double blade motor components |
| CN207212730U (en) * | 2017-09-15 | 2018-04-10 | 中山市春凯电器有限公司 | A kind of vertical fan |
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