CN2844527Y - Axial-flow fan - Google Patents
Axial-flow fan Download PDFInfo
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- CN2844527Y CN2844527Y CN 200520083300 CN200520083300U CN2844527Y CN 2844527 Y CN2844527 Y CN 2844527Y CN 200520083300 CN200520083300 CN 200520083300 CN 200520083300 U CN200520083300 U CN 200520083300U CN 2844527 Y CN2844527 Y CN 2844527Y
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- fins
- air
- axial fan
- wheel hub
- fin
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Abstract
The utility model relates to an axial-flow fan which realizes a novel fan fin structure based on the increase of air output and the reduction of the noises of blowing, the aim of the utility model is to meet the design requirements of the miniaturization, the mute sound and the energy conservation of air conditioners or air interchangers. Meanwhile, the heat-exchange rate of the air conditioners is improved. The axial-flow fan is provided with a center wheel hub and a plurality of fins, wherein the center wheel hub is used as a rotary shaft; the fins are arranged at the peripheral side of the wheel hub in a radial shape. The back margin part of the fins of the axial flow fan is provided with an expansion part which faces to the back side of the rotating direction of the fins; the expansion part which is expanded in the shape of a curved line is formed by orderly expanding from the inner circumference on one side of the wheel hub arranged at the back margin part of the fins to the outer circumference instead of recessing to the front side in the rotating direction of the fins. The surfaces of the fins arranged at one side from which air is led in are smooth mirror surfaces; the diameter of the fins of the axial-flow fan is in the range of 400 to 500 millimeters.
Description
Technical field
The utility model is a kind of novel axial fan that is used for air conditioner and air interchanger, relates to the improvement design about the axial flow fan tab construction particularly.
Background technique
In air conditioner outdoor machine or other air interchangers, adopt various axial fans usually for realizing that air circulation flows.The basic structure of existing axial fan is by constituting as the wheel hub of running shaft with at several fins that this maincenter outer circumferential side is radial arrangement.By the motor driving rotation, air flows into from the front edge of fin, and the hinder marginal part in the boosted back of aerofoil from fin blows out.
Axial flow fan structure improves at present, and mainly being increases air output and reduce the air-supply noise for realizing.Improvement project mainly is to the airintake direction of existing fin, true dip direction, angle of inclination, warpage angle or the setting angle of fin etc. of revolution side.
As the disclosed following scheme of Japan Patent 2002-257088 communique, have towards the bulge of fin sense of rotation rear side (air outflow side) in the design of the hinder marginal part of fin.Described bulge is to be recessed to form to the importing direction opposite with the air stream outgoing direction (the sense of rotation front side of fin) by the profile line that makes the fin hinder marginal part (connecting the inner circumference edge of wing hinder marginal part and the line of outer periphery).Described bulge can be implemented under the rotating speed state in 200 to the 400rpm scopes, and the air-supply noise of axial fan is lower.
Aforesaid documents, when improving the axial fan rotating speed with the increase air output, because fin bulge that hinder marginal part is formed with, the air that flows out from this position can produce whirlpool at the bulge rear, thereby the air-supply noise will increase, thereby becomes the noise problem of the environment that uses air conditioner or air interchanger.
The model utility content
Axial fan described in the utility model, its purpose is to address the above problem and provides a kind of on the basis that increases air output, can realize reducing the novel fan blade structure of air-supply noise, to satisfy the designing requirement of air conditioner or air interchanger miniaturization, quietization and energy-conservationization, improve the rate of heat exchange of air conditioner simultaneously.
For realizing above-mentioned purpose of design, axial fan described in the utility model has as the center hub of running shaft and is arranged on the wheel hub outer circumferential side and is several fins of radial arrangement.
Different with the tab construction of existing axial fan is that axial fan described in the utility model, the hinder marginal part of its fin have the bulge that expands towards shape fin sense of rotation rear side and curved.This bulge is that the inner circumference edge from wheel hub one side of wing hinder marginal part expands successively to outer periphery and forms, and is not the front side depression of airfoil sense of rotation.
As the described axial fan of above-mentioned structure, the air-supply noise that is produced when reducing rotating operation, the aerofoil that imports side towards air of described fin is a smooth smooth minute surface.
Further improving structure is that the fin diameter of described axial fan is in 400 to 500 millimeters scope.
As above content, the advantage of axial fan described in the utility model and application process thereof is: the formed bulge that expands successively from the inner circumference edge of fin hinder marginal part wheel hub one side to outer periphery, can make axial fan under 600 to 800rpm rotating speed on the basis that increases air output, the noise that axial fan produced be less.
Description of drawings
Fig. 1 a is that described axial fan is from the observed structural drawing in air inflow side;
Fig. 1 b is the side view of Fig. 1 a;
Fig. 1 c is the worm's eye view of Fig. 1 a;
Fig. 2 is a structural drawing of observing the wing hinder marginal part of described axial fan from the direction of vertical direction;
Fig. 3 a is the X-Y coordinate axes of the fin stero shape shown in Fig. 1 a to Fig. 1 c;
Fig. 4 is the slightly linearly structural drawing of fin hinder marginal part of existing axial fan;
Fig. 5 is the bulge structural drawing of the fin hinder marginal part of existing axial fan.
Extremely shown in Figure 5 as Fig. 1 a, the inner circumference edge 23b of wheel hub 10, fin 20, nose of wing portion 21, aerofoil 22, wing hinder marginal part 23, bulge 23a, wing hinder marginal part, the outer periphery 23c of wing hinder marginal part, rectification projection 24.
Embodiment
Embodiment 1, and shown in Fig. 1 a to Fig. 3 b, axial fan described in the utility model is to constitute by the wheel hub 10 that becomes running shaft and at 3 fins 20 that its outer circumferential side is radial arrangement, and the diameter of fin 20 is 440mm.
The method of using the axial fan of said structure is, the running speed of axial fan can be controlled in 600 to 800rpm the scope.
Axial fan as above-mentioned structure, its wheel hub 10 is connected the rotation shaft side of motor, and press the direction of arrow shown in Fig. 1 a and rotate driving, air flows into from the nose of wing portion 21 of the sense of rotation front side of fin 20 thus, after being boosted by aerofoil 22, air blows out from the wing hinder marginal part 23 of the sense of rotation front side of fin 20.
Have towards the sense of rotation rear side of fin 20 and the bulge 23a of curved shape at wing hinder marginal part 23.
As shown in Figure 2, observe the wing hinder marginal part 23 of fin 20 from vertically upward direction, from the inner circumference edge 23b of wing hinder marginal part 23, until outer periphery 23c, bulge 23a expands successively, be not airfoil 20 revolve shape direction front side depression.
The X-Y coordinate axes schematic representation of fin 20 stero shapes shown in Fig. 3 a.
As comparative example, axial fan has slightly linearly wing hinder marginal part 23 as shown in Figure 4.
Fig. 5 is as above-mentioned contrast patent documentation is announced, makes the sense of rotation front side depression of wing hinder marginal part 23 airfoil 20, has formed bulge 23a thus.In axial flow fan shown in Figure 5,, several rectification projections have been formed at aerofoil 22 in order to reduce the air-supply noise.
The existing axial fan of said structure, be installed on the noiseless indoor air conditioner outdoor machine, begun to the position determination of 1m the air-supply noise from the air blow-off outlet of air conditioner outdoor machine.
Used common noise meter as noise meter.At the pipeline of the air blow-off outlet connection 440mm of air conditioner outdoor machine Φ * 900mmL,, obtain air quantity according to its mean velocity to measure the air velocity in the pipeline.
Shown in following table 1 is the measurement result of air quantity and air-supply noise.
| Diameter dimension/rotating speed | 200rpm | 400rpm | 600rpm | 800rpm | 1,000rpm |
| r1 | 4.8 | 9.5 | 12.5 | 18.0 | 22.0 |
| r2 | 6.0 | 11.0 | 14.5 | 19.5 | 25.0 |
| r3 | 6.5 | 10.5 | 15.0 | 19.5 | 25.0 |
| r4 | 7.0 | 11.5 | 14.5 | 18.5 | 24.0 |
| r5 | 7.2 | 10.2 | 14.0 | 19.0 | 24.0 |
| On average | 6.30 | 10.54 | 14.10 | 18.90 | 24.00 |
| Wind air quantity (CMH) | 3,441 | 5,756 | 7,700 | 10,322 | 13,107 |
| Uproar noise (dB) A | 30 | 38 | 43 | 51 | 57 |
According to above-mentioned table 1 content, axial fan described in the utility model to be compared with existing axial fan shown in Figure 4, the revolution of axial fan described in the utility model is higher, air output big and the air-supply noise is lower.
Axial fan described in the utility model is compared with axial fan shown in Figure 5, though existing axial fan is formed with the rectification projection in the aerofoil setting, but the air-supply noise is still bigger, and in the time of particularly in rotating speed reaches 600 to 800rpm scopes, this otherness is just more remarkable.
As following table is in the present embodiment, with the coordinate axes among Fig. 3 a (X, the height of each coordinate position when position that Y) is (70,110) is reference point (0 point) decomposes explanation:
Figure 3B (mm)
Thereby axial fan described in the utility model can reduce the air-supply noise again when increasing air output.
Claims (3)
1, a kind of axial fan, have as the center hub of running shaft and be arranged on the wheel hub outer circumferential side and be several fins of radial arrangement, it is characterized in that: the hinder marginal part of the fin of described axial fan has the bulge that expands towards shape fin sense of rotation rear side and curved;
Described bulge is that the inner circumference edge from wheel hub one side of wing hinder marginal part expands successively to outer periphery and forms, and is not the front side depression of airfoil sense of rotation.
2, axial fan according to claim 1 is characterized in that: the aerofoil towards air importing side of described fin is a smooth smooth minute surface.
3, axial fan according to claim 1 and 2 is characterized in that: the fin diameter span of described axial fan is 400 to 500 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520083300 CN2844527Y (en) | 2005-05-17 | 2005-05-17 | Axial-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520083300 CN2844527Y (en) | 2005-05-17 | 2005-05-17 | Axial-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2844527Y true CN2844527Y (en) | 2006-12-06 |
Family
ID=37486477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520083300 Expired - Lifetime CN2844527Y (en) | 2005-05-17 | 2005-05-17 | Axial-flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2844527Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939392A (en) * | 2013-01-18 | 2014-07-23 | 珠海格力电器股份有限公司 | Axial flow fan blade and air conditioner provided with same |
| CN105927586A (en) * | 2016-06-03 | 2016-09-07 | 华中科技大学 | Modified open-type axial flow fan blade and modification method thereof |
-
2005
- 2005-05-17 CN CN 200520083300 patent/CN2844527Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939392A (en) * | 2013-01-18 | 2014-07-23 | 珠海格力电器股份有限公司 | Axial flow fan blade and air conditioner provided with same |
| CN103939392B (en) * | 2013-01-18 | 2017-05-24 | 珠海格力电器股份有限公司 | Axial flow fan blade and air conditioner provided with same |
| CN105927586A (en) * | 2016-06-03 | 2016-09-07 | 华中科技大学 | Modified open-type axial flow fan blade and modification method thereof |
| CN105927586B (en) * | 2016-06-03 | 2018-05-11 | 华中科技大学 | The Start-stop control leaf and its modified method of a kind of remodeling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150517 Granted publication date: 20061206 |