CN203717443U - Fan and air conditioning comprising fan - Google Patents
Fan and air conditioning comprising fan Download PDFInfo
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- CN203717443U CN203717443U CN201420060130.XU CN201420060130U CN203717443U CN 203717443 U CN203717443 U CN 203717443U CN 201420060130 U CN201420060130 U CN 201420060130U CN 203717443 U CN203717443 U CN 203717443U
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Abstract
The utility model discloses a fan, comprising a wheel hub and n blades distributed along the circumference of the wheel hub uniformly, wherein n is an integer and is not less than 2; the fan is provided with at least two blades with different leading edge axial heights. As the fan is provided with two or more blades with different leading edge axial heights, all the blades of the fan are in asymmetric arrangement; the fan with the blades in asymmetric arrangement breaks the integer fundamental frequency distribution characteristic of the discrete noise frequency, can effectively reduce the aerodynamic noise caused by the fact the blades flap the surrounding air periodically during operation, furthermore, the blade acting area can be optimized to the maximum, thus the noise of the fan operation is effectively reduced, and the power consumption of the fan is effectively lowered. The utility model also discloses two other fans, and an air conditioning comprising one of the fans.
Description
Technical field
The utility model relates to air-conditioning preparing technical field, more particularly, and the air-conditioning that relates to a kind of fan and comprise this fan.
Background technique
Along with the raising of people to the requirement of quality of life, the demand of air-conditioning is rapid growth day by day also, and the air-conditioning of high-performance, low noise has more and more received people's concern.
What have to admit is, the noise producing when various fans move in air-conditioning is one of main source of air conditioner noises, and in the noise producing at fan, the aerodynamic noise that during fan operation, fan blade produces is far longer than again machinery or the electromagnetic noise of fan blade and miscellaneous part coupling generation.
Fan generally comprises wheel hub and is arranged on a plurality of blades on wheel hub, and the wheel hub of fan is cylindrical shape, the blade of fan is by leading edge curve, trailing edge curve, leaf summit curve and blade root curve surround, wherein blade root curve is for being fixedly connected with wheel hub, leading edge curve is for being positioned at the curve of front end along the sense of rotation of blade, trailing edge curve is for being positioned at the curve of rear end along the sense of rotation of blade, leaf summit curve is the curve relative with blade root curve, in order to meet aerodynamics requirement, the blade of fan generally tilts to be arranged on wheel hub at an angle, wherein the leading edge of blade root curve is blade inlet edge axial height to the distance of wheel hub bottom, centered by wheel hub center, take R as cylndrical surface that radius is done by blade cuts, the established angle that on cross section, the angle of leading edge curve and trailing edge curve line and horizontal plane is blade, the leading edge direction angle that angle between the center line leading edge point tangent line of cross section upper blade and leading edge curve and trailing edge curve line is blade, the trailing edge direction angle that angle between the center line trailing edge point tangent line of cross section upper blade and leading edge curve and trailing edge curve line is blade, the thickness that the upper surface of cross section upper blade and the distance between lower surface are blade.
At present easy for what design and manufacture, general by the thickness of each blade in fan, the leading edge axial height of fan blade, blade angle, the leading edge direction angle of blade and the trailing edge direction angle of blade are only set to identical numerical value, and each blade is circumferentially uniform along wheel hub, this just makes each blade on fan all be symmetrical formal distribution on wheel hub, although the fan of this form has been realized the easy of design and the manufacturing, but the aerodynamic noise that its fan blade of the fan of this kind of form produces when operation is mainly discrete noise and wideband noise, according to the formula of discrete frequency noise, can draw when the equal full symmetric of each blade is arranged, the discrete noise that fan blade produces is basis of integer frequency division cloth, in the time of can causing fan operation, there is larger noise in this.
Therefore, how can further reduce current fan aerodynamic noise when rotated, be the technical problem that current those skilled in the art need solution badly thereby meet people to quiet more and more higher requirement.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of fan, to can reduce the aerodynamic noise that current fan produced when rotated, thereby meets people to quiet more and more higher requirement.
Another object of the present utility model is to provide a kind of air-conditioning with the fan that above-mentioned noise is lower.
For achieving the above object, the utility model first aspect provides following technological scheme:
A fan, comprises wheel hub and along circumferential n the uniform blade of described wheel hub, and the value of described n is integer and is not less than 2, and the leading edge axial height that has two blades in described fan at least is not etc.
Preferably, in described blade, the leading edge axial height of a blade is
1≤a≤n wherein,
for the leading edge axial height predefined value of whole blades of when design, and the difference sum between the leading edge axial height of each blade and the leading edge axial height predefined value of described whole blades in described fan
Preferably, the difference DELTA Ha between the leading edge axial height of a blade and the leading edge axial height predefined value of described whole blades and the leading edge axial height predefined value of described whole blades in described fan
ratio be more than or equal to-10% and be less than or equal to 10%.
The utility model second aspect also provides another fan, this fan comprises wheel hub and along circumferential n the uniform blade of described wheel hub, the value of described n is integer and is not less than 2, and centered by the center of described wheel hub, take radius on the blade profile that cylndrical surface was cut out that R was done, not etc., and/or the trailing edge direction angle that has two blades at least is not etc. for the leading edge direction angle that has two blades at least, and/or the established angle that has two blades at least is not etc.
Preferably, the leading edge axial height that has two blades in described fan at least is not etc.
Preferably, the leading edge direction angle of a blade is
1≤a≤n wherein,
the predefined value of the leading edge direction angle of whole blades during for design, the trailing edge direction angle of a blade is
1≤a≤n wherein,
for whole predefined values of the trailing edge direction angle of blades, the established angle of a blade (2) is
1≤a≤n wherein,
for whole predefined values of the established angle of blades (2), and the difference sum between the leading edge direction angle of each blade and the predefined value of the leading edge direction angle of described whole blades in described fan
difference sum in described fan between the trailing edge direction angle of each blade and the predefined value of the trailing edge direction angle of described whole blades
difference sum in described fan between the predefined value of the established angle of the established angle angle of each blade (2) and described whole blade (2)
Preferably, the predefined value of the leading edge direction angle of the difference DELTA β a between the leading edge direction angle of a blade and the predefined value of the leading edge direction angle of described whole blades and described whole blades in described fan
ratio be more than or equal to-25% and be less than or equal to 20%; The predefined value of the difference DELTA γ a in described fan between the trailing edge direction angle of a blade and the predefined value of the trailing edge direction angle of described whole blades and the trailing edge direction angle of described whole blades
ratio be more than or equal to-25% and be less than or equal to 20%; The predefined value of the difference DELTA α a in described fan between the predefined value of the established angle of the established angle of a blade (2) and described whole blade (2) and the established angle of described whole blade (2)
ratio be more than or equal to-25% and be less than or equal to 20%.
The utility model third aspect also provides a kind of fan, this fan comprises wheel hub and along circumferential n the uniform blade of described wheel hub, the value of described n is integer and is not less than 2, and centered by the center of described wheel hub, take radius on the blade profile that cylndrical surface was cut out that R was done, and the thickness that has two blades at least is not etc.
Preferably, not etc., and/or the trailing edge direction angle that has two described blades at least is not etc. for the leading edge direction angle that has two described blades in described fan at least, and/or the established angle that has two described blades (2) at least is not etc.
Preferably, the leading edge axial height that has two blades in described fan at least is not etc.
Preferably, in described blade, the front vane thickness of a blade is
1≤a≤n wherein,
for the predefined value of thickness of whole blades of when design, and the difference sum between the thickness of each blade and the predefined value of the thickness of described whole blades in described fan
Preferably, in described fan the difference DELTA δ a between the thickness of a blade and the predefined value of the thickness of described whole blades and described whole blades the predefined value of thickness
ratio be more than or equal to-25% and be less than or equal to 20%.
In the utility model, also disclose a kind of air-conditioning, this air-conditioning comprises fan, and described fan is fan as disclosed in any one in the third aspect.
From above-mentioned technological scheme, can find out, the fan blade that general plotting of the present utility model is fan is set to non-symmetry structure, unequal by the axial height of at least two blade inlet edges in fan blade is set under this total model utility design, making the leading edge direction angle of at least two blades on the formed blade tangent plane in same cylndrical surface be set to unequal and/or trailing edge direction angle is set to unequal, and make the unequal asymmetric setting that realizes this fan vane of the thickness of at least two blades on the formed blade tangent plane in same cylndrical surface, because each blade right and wrong are symmetrically arranged, thereby just broken the feature that discrete frequency noise is basis of integer frequency division cloth, thereby realized the reduction of noise when fan rotates.
Because said fans has multiple advantage, thereby the air-conditioning with this kind of fan also has concurrently equally, herein this no longer repeated.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic top plan view that Fig. 1 is the fan that provides in the utility model embodiment;
Fig. 2 is the scheme of installation of blade in the fan providing in the utility model embodiment and wheel hub;
Fig. 3 is the schematic top plan view of Fig. 2;
Fig. 4 is the A-A sectional view in Fig. 3.
Wherein,
1 is wheel hub, and 2 is blade;
21 is leading edge curve, and 22 is trailing edge curve, and 23 is blade root curve, and 24 is leaf summit curve.
Embodiment
Core of the present utility model is to provide a kind of fan, can reduce the aerodynamic noise that current fan produced when rotated, thereby meets people to quiet more and more higher requirement.
Another core of the present utility model is to provide a kind of air-conditioning with the fan that above-mentioned noise is lower.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
First general plotting of the present utility model is introduced, well known to those skilled in the artly be, when the blade of fan is circumferentially and when all full symmetric arranges axially of wheel hub, the noise producing during blade operation is divided into discrete noise and wideband noise, wherein the shared proportion of discrete noise is larger, and in this kind of situation, the frequency computation part formula of discrete noise is f
i=nzi/60, the rotating speed that wherein n is blade, z is the number of blade of fan, i is harmonic wave sequence number, as can be seen here, and when blade is circumferentially and when all full symmetric arranges axially of wheel hub, the noise that blade produces is integral multiple fundamental frequency and distributes, this will cause discrete noise peak value obvious, increase noise total value, and the utility model is basis of integer frequency division cloth angle from breaking discrete frequency noise goes out to send to reduce the noise that fan blade produces operation process.
In the utility model embodiment, mainly in three kinds of modes, realize the asymmetric setting of fan blade, first first kind of way is wherein introduced.
Refer to Fig. 1 and Fig. 2, the schematic top plan view that Fig. 1 is the fan that provides in the utility model embodiment; Fig. 2 is the scheme of installation of blade in the fan providing in the utility model embodiment and wheel hub.
Before carrying out the introduction of first kind of way, be necessary the leading edge axial height of blade 2 to make an explanation, it is with reference to figure 2, Fig. 2 is the scheme of installation of first blade and wheel hub in the fan providing in the utility model embodiment, its Leaf is surrounded by leading edge curve 21, trailing edge curve 22, leaf summit curve 24 and blade root curve 23, and the leading edge of blade root curve 23 is to the distance H of wheel hub 1 bottom
1for first blade inlet edge axial height, in like manner, the leading edge axial height of n blade is H
n.
Because fan comprises a plurality of circumferential uniform blades 2 along wheel hub 1, thereby in mode, in order to make a plurality of blades 2 form the form of asymmetric arrangement, in the fan providing in the present embodiment, have at least the leading edge axial height of two blades 2 unequal in this.
Owing to there being two or unequal with the leading edge axial height of more blades 2 in fan, thereby all blades 2 in this fan are unsymmetric form layout, and blade 2 is the fan that unsymmetric form arranges and has broken the feature that discrete frequency noise is basis of integer frequency division cloth, this can effectively reduce blade 2 and periodically pat surrounding atmosphere and the aerodynamic noise that produces in when operation, this can also optimize the size in blade 2 acting regions to greatest extent on the other hand, thereby is reducing the power consumption that effectively reduces fan when fan rotates noise.
In order further to reduce the noise of fan when rotating, improve the stationarity that fan rotates, in the fan providing in the present embodiment, each blade 2 is zero with respect to the deviation sum of the predefined value of the leading edge axial height of all blades 2, concrete, in the present embodiment, the leading edge axial height of a blade adopts representation
represent, 1≤a≤n wherein, and
for the leading edge axial height predefined value of whole blades 2 when designing, the leading edge axial height that is a blade 2 by the known Δ Ha of above formula and all difference of the leading edge axial height predefined value of blades 2, and Δ H1 is to Δ Hn sum
although all blades 2 are asymmetric arrangement, the leading edge axial height of all blades 2 is cancelled out each other with respect to the deviation of the leading edge axial height predefined value of whole blades 2, and this can further guarantee the stationarity that fan rotates, and reduces the noise of fan.
As shown in Figure 2, h
1for the leading edge of blade 2 and the axial height between trailing edge, those skilled in the art easily expect, leading edge that can also be by least two blades 2 in fan blade 2 and the axial height between trailing edge are set to not etc., thereby realize the asymmetric arrangement of each blade 2.
If the leading edge axial height of certain blade 2 is excessive with respect to the deviate of the leading edge axial height of all blades 2, what the axial height of wheel hub 1 need to arrange so is larger, this will increase the cost of wheel hub 1 structural material, for this reason the difference DELTA Ha between the leading edge axial height of a blade 2 in the present embodiment and the leading edge axial height predefined value of whole blades 2 and the leading edge axial height predefined value of described whole blade 2
ratio be more than or equal to-10% and be less than or equal to 10%,
value between positive and negative 10%, preferably 5% so that when guaranteeing the asymmetric setting of fan blade 2, can effectively reduce production costs.
The mode that also provides another to realize blade asymmetric arrangement in the utility model embodiment, before being introduced, is necessary that leading edge direction angle, trailing edge direction angle and the established angle to blade describes.
As shown in Figures 3 and 4, take the center of fan hub 1 is axle center, the cylndrical surface of being done with radius R is by 2 cuttings of the blade of fan, on this tangent plane, the established angle α that the angle of leading edge curve 21 and trailing edge curve 22 lines and horizontal plane is blade, angle between the center line leading edge point tangent line of cross section upper blade 2 and leading edge curve 21 and trailing edge curve 22 lines is the leading edge direction angle β of blade 2, and the angle between the center line trailing edge point tangent line of cross section upper blade 2 and leading edge curve 21 and trailing edge curve 22 lines is the trailing edge direction angle γ of blade 2.
Because fan comprises a plurality of circumferential uniform blades 2 along wheel hub 1, thereby in this kind of mode, in order to make a plurality of blades form the form of asymmetric arrangement, the leading edge direction angle that two blades 2 are provided at least in the fan providing in the present embodiment is not etc., and/or the trailing edge direction angle of at least two blades 2 is not etc., and/or the established angle that has two blades at least is not etc.
Due in fan, have two or and the leading edge direction angle of more blades 2 on the cylinder tangent plane of same Radius not etc., and/or trailing edge direction angle is not etc., and/or established angle is not etc., thereby all blades 2 in this fan are unsymmetric form layout, and blade 2 is the fan that unsymmetric form arranges and has broken the feature that discrete frequency noise is basis of integer frequency division cloth, this can effectively reduce blade 2 and periodically pat surrounding atmosphere and the aerodynamic noise that produces in when operation, this can also optimize the size in blade 2 acting regions to greatest extent on the other hand, thereby reducing the power consumption that effectively reduces fan when fan rotates noise.
What need to describe is, leading edge direction angle does not wait, trailing edge direction angle not etc. and established angle three kinds of modes such as not, can take any one mode wherein to realize the asymmetric arrangement of blade 2, also can adopt the combination of any two kinds of modes to realize the asymmetric arrangement of blade 2, even can three kinds mode adopt to realize the asymmetric arrangement of blade 2 simultaneously.
Further, on the different basis of leading edge direction angle, trailing edge direction angle or the established angle of blade 2, the leading edge axial height of at least two blades 2 in fan is set to unequal form simultaneously, thereby realizes the asymmetric arrangement of blade.
In order further to reduce the noise of fan when rotating, improve the stationarity that fan rotates, in the fan providing in the present embodiment, the leading edge direction angle of each blade 2 is zero with respect to the deviation sum of the predefined value of the leading edge direction angle of all blades 2, concrete, in the present embodiment, the leading edge direction angle of a blade 2 adopts representation
represent, 1≤a≤n wherein, and
for the predefined value of the leading edge direction angle of whole blades 2 when designing, the leading edge direction angle that is a blade 2 by the known Δ β of above formula a and all difference of the leading edge direction angle predefined value of blades 2, and Δ β 1 is to Δ β n sum
although all blades 2 are asymmetric arrangement, the leading edge direction angle of all blades 2 is cancelled out each other with respect to the deviation of the leading edge direction angle predefined value of whole blades 2, and this can further guarantee the stationarity that fan rotates, and reduces the noise of fan; In like manner, the trailing edge direction angle of each blade 2 is zero with respect to the deviation sum of the predefined value of the trailing edge direction angle of all blades 2,
the established angle of each blade 2 is also zero with respect to the deviation sum of the predefined value of the established angle of all blades 2,
If the leading edge direction angle of certain blade 2, trailing edge direction angle or established angle are excessive with respect to the predefined value deviate of the predefined value of the leading edge direction angle of all blades 2, the predefined value of trailing edge direction angle and established angle, can increase so undoubtedly the difficulty that blade 2 is manufactured, this just makes the fabricating cost of blade 2 improve, the difference DELTA β a between the leading edge direction angle of a blade 2 in the present embodiment and the leading edge direction angle predefined value of whole blades 2 and all predefined value of the leading edge direction angle of blades 2 for this reason
ratio be more than or equal to-25% and be less than or equal to 20%, such as be ± 10% or ± 15% etc. so that when guaranteeing the asymmetric setting of fan blade 2, can effectively reduce production costs; In like manner, the difference DELTA γ a between the trailing edge direction angle of a blade 2 and the trailing edge direction angle predefined value of whole blades 2 and all predefined value of the trailing edge direction angle of blades
ratio be more than or equal to-25% and be less than or equal to 20%, such as be ± 10% or ± 15% etc., the difference DELTA α a between the established angle predefined value of the established angle of a blade 2 and all blades 2 and whole predefined values of the established angle of blades
ratio be also more than or equal to-25% and be less than or equal to 20%, such as be ± 10% or ± 15% etc.
A kind of mode that realizes blade asymmetric arrangement is also provided in the utility model embodiment, before being introduced, has been necessary the section thickness of blade to describe.
As shown in Figures 3 and 4, take the center of fan hub is axle center, and the cylndrical surface of being done with radius R is by 2 cuttings of the blade of fan, and on this tangent plane, the distance between the upper surface of blade 2 and the lower surface of blade 2 is the thickness δ of blade 2.
Because fan comprises a plurality of circumferential uniform blades 2 along wheel hub 1, thereby in this kind of mode, in order to make a plurality of blades 2 form the form of asymmetric arrangement, the thickness that two blades 2 are provided at least in the fan providing in the present embodiment is not etc.
Certainly, what those skilled in the art easily expected is, on the basis of not waiting at blade 2 thickness, leading edge direction angle that can also at least two blades 2 is set to unequal, and/or the trailing edge direction angle of at least two described blades 2 be set to unequal, and or the established angle that has two blades 2 at least not etc., further, on this basis, leading edge axial height that can also at least two blades 2 is set to unequal, to realize the asymmetric arrangement of blade 2.
In order further to reduce the noise of fan when rotating, improve the stationarity that fan rotates, in the fan providing in the present embodiment, the thickness of each blade 2 is zero with respect to the deviation sum of the predefined value of the thickness of all blades 2, concrete, in the present embodiment, the thickness of a blade 2 adopts representation
represent, 1≤a≤n wherein, and
for the predefined value of the thickness of whole blades 2 when designing, the thickness that is a blade 2 by the known Δ δ of above formula a and all difference of the predefined value of the thickness of blades 2, and Δ δ 1 is to Δ δ n sum
although all blades 2 are asymmetric arrangement, the thickness of all blades 2 is cancelled out each other with respect to the deviation of the predefined value of the thickness of whole blades 2, and this can further guarantee the stationarity that fan rotates, and reduces the noise of fan.
If the thickness of certain blade 2 is excessive with respect to the deviate of the predefined value of the thickness of all blades 2, can increase so undoubtedly difficulty and cost of material that blade 2 is manufactured, this is unfavorable for the reduction of fan cost of production, the difference DELTA δ a between the thickness of a blade 2 in the present embodiment and the thickness of whole blades 2 and all predefined value of the thickness of blades 2 for this reason
ratio be more than or equal to-25% and be less than or equal to 20%, such as be ± 10% or ± 15% etc. so that when guaranteeing the asymmetric setting of fan blade, can effectively reduce fan cost of production.
In the present embodiment, also disclose a kind of air-conditioning, in this air-conditioning, be provided with fan, and this fan is disclosed fan in the third embodiment.
Because disclosed fan in above-described embodiment has above-mentioned advantage, thereby the air-conditioning with this kind of fan also has concurrently equally, in present specification, this no longer repeated.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiments, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (13)
1. a fan, comprises wheel hub (1) and along circumferential uniform n the blade (2) of described wheel hub, the value of described n is integer and is not less than 2, it is characterized in that, the leading edge axial height that has two blades (2) in described fan at least is not etc.
2. fan as claimed in claim 1, is characterized in that, in described blade, the leading edge axial height of a blade (2) is
1≤a≤n wherein,
for whole leading edge axial height predefined values of blades (2), and the difference sum between the leading edge axial height of each blade (2) and the leading edge axial height predefined value of described whole blade (2) in described fan
3. fan as claimed in claim 2, it is characterized in that the difference DELTA Ha in described fan between the leading edge axial height of a blade (2) and the leading edge axial height predefined value of described whole blade (2) and the leading edge axial height predefined value of described whole blade (2)
ratio be more than or equal to-10% and be less than or equal to 10%.
4. a fan, comprise wheel hub (1) and along circumferential uniform n the blade (2) of described wheel hub, the value of described n is integer and is not less than 2, it is characterized in that, centered by the center of described wheel hub (1), take radius on the blade profile that cylndrical surface was cut out that R was done, the leading edge direction angle that has two blades (2) at least is not etc., and/or the trailing edge direction angle that has two blades at least is not etc., and/or the established angle that has two blades at least is not etc.
5. fan as claimed in claim 4, is characterized in that, the leading edge axial height that has two blades (2) in described fan at least is not etc.
6. fan as claimed in claim 4, is characterized in that, the leading edge direction angle of a blade (2) is
1≤a≤n wherein,
for whole predefined values of the leading edge direction angle of blades (2), the trailing edge direction angle of a blade (2) is
1≤a≤n wherein,
for whole predefined values of the trailing edge direction angle of blades (2), the established angle of a blade (2) is
1≤a≤n wherein,
for whole predefined values of the established angle of blades (2), and the difference sum between the leading edge direction angle of each blade (2) and the predefined value of the leading edge direction angle of described whole blade (2) in described fan
difference sum in described fan between the predefined value of the trailing edge direction angle of the trailing edge direction angle of each blade (2) and described whole blade (2)
difference sum in described fan between the predefined value of the established angle of the established angle angle of each blade (2) and described whole blade (2)
7. fan as claimed in claim 6, it is characterized in that the predefined value of the difference DELTA β a in described fan between the predefined value of the leading edge direction angle of the leading edge direction angle of a blade (2) and described whole blade (2) and the leading edge direction angle of described whole blade (2)
ratio be more than or equal to-25% and be less than or equal to 20%; The predefined value of the difference DELTA γ a in described fan between the predefined value of the trailing edge direction angle of the trailing edge direction angle of a blade (2) and described whole blade (2) and the trailing edge direction angle of described whole blade (2)
ratio be more than or equal to-25% and be less than or equal to 20%; The predefined value of the difference DELTA α a in described fan between the predefined value of the established angle of the established angle of a blade (2) and described whole blade (2) and the established angle of described whole blade (2)
ratio be more than or equal to-25% and be less than or equal to 20%.
8. a fan, comprise wheel hub (1) and along circumferential n the uniform blade of described wheel hub, the value of described n is integer and is not less than 2, it is characterized in that, centered by the center of described wheel hub (1), take radius on the blade profile that cylndrical surface was cut out that R was done, and the thickness that has two blades (2) at least is not etc.
9. fan as claimed in claim 8, it is characterized in that, not etc., and/or the trailing edge direction angle that has two described blades (2) at least is not etc. for the leading edge direction angle that has two described blades (2) in described fan at least, and/or the established angle that has two described blades (2) at least is not etc.
10. fan as claimed in claim 9, is characterized in that, the leading edge axial height that has two blades (2) in described fan at least is not etc.
11. fans as claimed in claim 8, is characterized in that, in described blade (2), the vane thickness of a blade (2) is
1≤a≤n wherein,
for the predefined value of the thickness of whole blades of when design (2), and the difference sum between the thickness of each blade (2) and the predefined value of the thickness of described whole blades in described fan
12. fans as claimed in claim 8, is characterized in that, the predefined value of the difference DELTA δ a in described fan between the predefined value of the thickness of the thickness of a blade (2) and described whole blade (2) and the thickness of described whole blade (2)
ratio be more than or equal to-25% and be less than or equal to 20%.
13. 1 kinds of air-conditionings, comprise fan, it is characterized in that, described fan is the fan as described in any one in claim 8-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060130.XU CN203717443U (en) | 2014-02-10 | 2014-02-10 | Fan and air conditioning comprising fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060130.XU CN203717443U (en) | 2014-02-10 | 2014-02-10 | Fan and air conditioning comprising fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717443U true CN203717443U (en) | 2014-07-16 |
Family
ID=51156601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420060130.XU Withdrawn - After Issue CN203717443U (en) | 2014-02-10 | 2014-02-10 | Fan and air conditioning comprising fan |
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| Country | Link |
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| CN (1) | CN203717443U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832459A (en) * | 2014-02-10 | 2015-08-12 | 珠海格力电器股份有限公司 | Fan and air conditioner comprising fan |
| CN110678660A (en) * | 2017-05-31 | 2020-01-10 | 三菱电机株式会社 | Propeller type impeller and air conditioning device for railway vehicle |
| CN111810441A (en) * | 2019-09-18 | 2020-10-23 | 湖南联诚轨道装备有限公司 | Fan, manufacturing method thereof and method for discharging medium |
-
2014
- 2014-02-10 CN CN201420060130.XU patent/CN203717443U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832459A (en) * | 2014-02-10 | 2015-08-12 | 珠海格力电器股份有限公司 | Fan and air conditioner comprising fan |
| CN104832459B (en) * | 2014-02-10 | 2018-01-02 | 珠海格力电器股份有限公司 | A kind of fan and the air-conditioning including the fan |
| CN110678660A (en) * | 2017-05-31 | 2020-01-10 | 三菱电机株式会社 | Propeller type impeller and air conditioning device for railway vehicle |
| CN111810441A (en) * | 2019-09-18 | 2020-10-23 | 湖南联诚轨道装备有限公司 | Fan, manufacturing method thereof and method for discharging medium |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20180102 |