CN201125883Y - Axial flow fan, blower fan using the same as well as outdoor unit of air conditioner - Google Patents
Axial flow fan, blower fan using the same as well as outdoor unit of air conditioner Download PDFInfo
- Publication number
- CN201125883Y CN201125883Y CNU2007201578391U CN200720157839U CN201125883Y CN 201125883 Y CN201125883 Y CN 201125883Y CN U2007201578391 U CNU2007201578391 U CN U2007201578391U CN 200720157839 U CN200720157839 U CN 200720157839U CN 201125883 Y CN201125883 Y CN 201125883Y
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- blade
- axial fan
- utility
- model
- axial flow
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Abstract
The utility model provides an axial flow fan, a fan adopting the axial fan and an outdoor set of the air conditioner. The axial flow fan according to the utility model can settle the problems of large noise, large volume and high cost in prior art. The axial flow fan according to the utility model reduces the noise in the blade and increases the static pressure through installing two blades with aspect ratio b/L for 1 to 1.5, namely the two-wing axial fans on the wheel spider. At the same time compared with the impeller with more than three blades, not only the volume taken by the impeller is reduced, but also the manufacturing cost of the impeller is reduced. The axial flow fan according to the utility model can be widely applied in the products of 2P suspension machine and cabinet machine.
Description
Technical field
The utility model belongs to air-conditioning and refrigeration engineering technical field, specifically a kind of axial fan, the blower fan that adopts this axial fan and air conditioner outdoor machine.
Background technique
In air conditioner outdoor machine or other air interchanger, for realizing that air circulation flows, carry out forced-convection heat transfer, adopt various axial fans usually, the basic structure of existing axial fan is by constituting as the wheel hub of running shaft with at several blades that this maincenter outer circumferential side is radial arrangement.By the motor driving rotation, air flows into from the front edge of blade, blows out from vane trailing edge portion in the boosted back of blade.Yet the important source of noise from air conditioner is exactly the fan noise in the air conditioner, how to have become very necessary in the noise research of keeping the essential low air conditioner outdoor machine of air quantity condition decline of air conditioner.
Present architecture advances to axial fan, mainly be for realizing increasing air output and reduce the air-supply noise that improvement project mainly is to the air intake direction of existing blade, true dip direction, angle of inclination, warpage angle or the setting angle of blade etc. of revolution side.
Simultaneously, also have by reducing blade quantity and reduce fan noise,, under the situation of air output surplus, can consider to cooperate the aspect ratio of blade to reduce noise for low power blower fan.
As shown in Figure 1, the wheel hub of impeller is have circular cross-section trapezoidal, when the least radius of the circle of wheel hub is r
1, the wheel hub maximum radius is r
2The time, represent hub radius to be " r ", then be defined as r=(r
1+ r
2)/2; Distance from the center of wheel hub to the minimum front end of blade is R
1, the distance from the center of wheel hub to the maximum front end of blade is R
2, represent impeller radius to be " R ", then be defined as R=(R
1+ R
2)/2;
As shown in Figure 2, represent the mean square radius of gyration to be " R
r" time, be defined as R
r=((R
2+ r
2)/2)
1/2
L is described representative mean square radius of gyration R
rThe chord length of the described blade of position, b is the length of the spanwise of the described blade of the position of the position that connects described representative hub radius r and described representative impeller radius R, ratio b/L represents aspect ratio.
The aspect ratio of impeller is very big to the air flow condition influence that enters blade, and then influence the size that blower fan produces noise, thereby consider in the selection of different aspect ratio blades, seek the noise that a kind of new solution reduces air conditioner outdoor machine, also to reduce manufacture cost simultaneously.
Summary of the invention
The utility model provides a kind of axial fan, has adopted the blower fan and the air conditioner outdoor machine of this axial fan, can solve the problem that noise is big, volume is big and cost is high that prior art exists.
In order to reach the purpose that solves the problems of the technologies described above, the technical solution of the utility model is,
A kind of axial fan comprises wheel hub and the blade that is arranged on the wheel hub, and the quantity of described blade is 2.
In the technical solution of the utility model, also have following technical characteristics: the span of the aspect ratio b/L of described blade is 1～1.5.
Further, described wheel hub is cylindrical.
Again further, the surface of described blade is provided with several projections, enters the stream condition of blade with improvement.
Further, described projection is tiny short strip shape, is located at the middle part at the edge that facings the wind of described blade at interval.
Further, described individual blade is provided with projection 4-6 bar.
Further, described 2 blades are that the center is symmetrically set with described wheel hub.
Both wings axial fan described in the utility model, purpose is to realize the low noiseization of air conditioner outdoor machine, improves the manufacture cost of static pressure and reduction impeller.
Adopt the axial fan of said structure, owing to the interval between two blades is fully roomy, the interval that produces near the suction surface the rotary vane periphery is fully roomy, the blade end eddy current of the air that produces near the suction surface the rotary vane periphery and this blade are peeled off and are left away, and alleviate influence to the inflow air state of other blades at the rear that then turns over, and, the disorder that each blade flows into air reduces, the inflow air that enters each blade is level and smooth, and the air during revolution on the blade of rear is peeled off with wild effect such as stall and is difficult to produce.Through experimental verification, can reduce the noise in the blade, improve static pressure.
The utility model compared with prior art has the following advantages and good effect:
Axial fan of the present utility model is 1～1.5 blade by 2 aspect ratio b/L are set on wheel hub, be the both wings axial fans, the noise that can solve the prior art existence is big, the problem that volume is big and cost is high, reduced the noise in the blade, improve static pressure, though two blades have reduced air output, but for low power blower fan, air output can guarantee, and checking by experiment, selecting aspect ratio b/L is the anti-acoustic capability that 1～1.5 blade has further improved blade, simultaneously with respect to the impeller of the blade more than 3, both reduce the shared volume of impeller, reduced the manufacture cost of impeller again.The utility model can be widely used in the middle of 2P on-hook and the cabinet-type air conditioner product.
Description of drawings
Fig. 1 is the diagrammatic side views of existing axial fan;
Fig. 2 is a structural representation of the present utility model;
Wherein: 1, wheel hub; 2, blade; 3, projection.
Embodiment
Below in conjunction with drawings and Examples the utility model is done to describe in further detail.
As shown in Figure 2, a kind of axial fan comprises wheel hub 1 and is 2 blades 2 that the center is symmetrically set with wheel hub 1 that wheel hub 1 is cylindrical, i.e. the least radius r of wheel hub 1
1With maximum radius r
2Equate that be hub radius r, the aspect ratio of blade 2 is 1.2.When blade turns clockwise, be provided with the projection 3 of complying with wind direction on the middle part surface at the edge that facings the wind of blade 2, projection 3 be tiny short strip shape, and every blade 2 is provided with 5 projections, and further improvement enters the stream condition of blade, strengthens the intensity of blade simultaneously.
Through experimental verification, the utility model can reduce the noise of blower fan, realizes the low noiseization of air conditioner outdoor machine, reduces the shared volume of impeller, reduces the manufacture cost of impeller simultaneously.
The above, it only is preferred embodiment of the present utility model, be not to be the restriction of the utility model being made other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (9)
1, a kind of axial fan comprises wheel hub and the blade that is arranged on the wheel hub, and it is characterized in that: the quantity of described blade is 2.
2, axial fan according to claim 1 is characterized in that: the span of the aspect ratio b/L of described blade is 1～1.5.
3, axial fan according to claim 2 is characterized in that: described wheel hub is cylindrical.
4, axial fan according to claim 3 is characterized in that: the surface of described blade is provided with several projections.
5, axial fan according to claim 4 is characterized in that: described projection is tiny short strip shape, is located at the middle part at the edge that facings the wind of described blade at interval.
6, axial fan according to claim 5 is characterized in that: described individual blade is provided with projection 4-6 bar.
7, axial fan according to claim 6 is characterized in that: described 2 blades are that the center is symmetrically set with described wheel hub.
8, a kind of blower fan is characterized in that being equipped with above-mentioned any described axial fan of claim.
9, a kind of air conditioner outdoor machine is characterized in that being equipped with any described axial fan of claim among the aforesaid right requirement 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201578391U CN201125883Y (en) | 2007-11-20 | 2007-11-20 | Axial flow fan, blower fan using the same as well as outdoor unit of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201578391U CN201125883Y (en) | 2007-11-20 | 2007-11-20 | Axial flow fan, blower fan using the same as well as outdoor unit of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125883Y true CN201125883Y (en) | 2008-10-01 |
Family
ID=39999352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201578391U Expired - Fee Related CN201125883Y (en) | 2007-11-20 | 2007-11-20 | Axial flow fan, blower fan using the same as well as outdoor unit of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125883Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042756A (en) * | 2015-08-28 | 2015-11-11 | 肖荣旭 | Multi-purpose circulating-current spray cooling and ventilating system |
| CN105275876A (en) * | 2014-05-26 | 2016-01-27 | 广东美的暖通设备有限公司 | Axial flow wind wheel of air-conditioning outdoor unit and air-conditioning outdoor unit provided therewith |
-
2007
- 2007-11-20 CN CNU2007201578391U patent/CN201125883Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275876A (en) * | 2014-05-26 | 2016-01-27 | 广东美的暖通设备有限公司 | Axial flow wind wheel of air-conditioning outdoor unit and air-conditioning outdoor unit provided therewith |
| CN105275876B (en) * | 2014-05-26 | 2019-03-12 | 广东美的暖通设备有限公司 | Air-conditioner outdoor unit axial-flow windwheel and air-conditioner outdoor unit with it |
| CN105042756A (en) * | 2015-08-28 | 2015-11-11 | 肖荣旭 | Multi-purpose circulating-current spray cooling and ventilating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20151120 |
|
| EXPY | Termination of patent right or utility model |