CN212155257U - Double-layer fan blade and fan - Google Patents
Double-layer fan blade and fan Download PDFInfo
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- CN212155257U CN212155257U CN202020116108.8U CN202020116108U CN212155257U CN 212155257 U CN212155257 U CN 212155257U CN 202020116108 U CN202020116108 U CN 202020116108U CN 212155257 U CN212155257 U CN 212155257U
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Abstract
The utility model provides a double-layer fan blade, which comprises a hub, a first fan blade, a second fan blade and an air guide ring; the wind guide ring is coaxially arranged with the hub, one end of the first fan blade is connected with the outer peripheral surface of the hub, the other end of the first fan blade is connected with the inner peripheral surface of the wind guide ring, one end of the second fan blade is connected with the outer peripheral surface of the wind guide ring, and the other end of the second fan blade is a free end; from the air inlet side to the air outlet side, the distance between the outer peripheral surface of the hub and the axis of the hub is gradually increased. This application provides a fan with this double-deck flabellum simultaneously, and this application passes through wheel hub's truncated cone design to reduce the area of air-out side, increase double-deck flabellum's wind degree and air supply distance.
Description
Technical Field
The utility model relates to a fan technical field especially relates to a double-deck flabellum and fan.
Background
The fan is mainly rotatory through the drive flabellum to realize the circulation with higher speed of air, traditional fan wind speed is not high and the air supply distance is shorter, can not satisfy people to the demand of wind-force.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a dual-layer fan blade and a fan, so as to solve the above problems.
The application provides a double-layer fan blade, which comprises a hub, a first fan blade, a second fan blade and an air guide ring;
the wind guide ring is coaxially arranged with the hub, one end of the first fan blade is connected with the outer peripheral surface of the hub, the other end of the first fan blade is connected with the inner peripheral surface of the wind guide ring, one end of the second fan blade is connected with the outer peripheral surface of the wind guide ring, and the other end of the second fan blade is a free end;
from the air inlet side to the air outlet side, the distance between the outer peripheral surface of the hub and the axis of the hub is gradually increased.
Further, the hub is in a truncated cone shape, and an inclination angle a between the outer peripheral surface of the hub and the axis of the hub satisfies: 8 to 12 degrees.
Further, the blades of the first fan blade and the second fan blade are both forward swept and bent.
Furthermore, the number of the first fan blades is four, and the four first fan blades are uniformly distributed on the outer peripheral surface of the hub.
Furthermore, the wind-guiding circle is including the drainage portion and the water conservancy diversion portion that are connected, the drainage portion is located air inlet side one side, the water conservancy diversion portion is located air outlet side one side, the drainage portion with the water conservancy diversion portion slope sets up.
Further, from the air inlet side to the water conservancy diversion portion, the bore of water conservancy diversion portion increases gradually, from water conservancy diversion portion to the air-out side, the bore of water conservancy diversion portion reduces gradually.
Further, the distance between the end of the flow guide part far away from the flow guide part and the axis of the hub is c, and the distance between the end of the flow guide part far away from the flow guide part and the axis of the hub is d, wherein c > d.
Further, the drainage portion is kept away from the one end of water conservancy diversion portion with the water conservancy diversion portion is kept away from line between the one end of drainage portion with contained angle b between the axis of wheel hub satisfies: 8 to 12 degrees.
The application also provides a fan, which comprises the double-layer fan blade.
Further, the fan further comprises a driving piece, the hub is provided with an accommodating hole, and at least part of the driving piece is accommodated in the accommodating hole.
The application provides a wheel hub of double-deck flabellum and fan is the truncated cone to reduce the area of air-out side, increase the wind degree and the air supply distance of double-deck flabellum.
Drawings
Fig. 1 is a schematic perspective view of a double-layer fan blade according to an embodiment of the present invention.
FIG. 2 is a perspective view of the fan blade shown in FIG. 1 from another angle.
Fig. 3 is a sectional view taken along iii-iii of the double-layer fan blade shown in fig. 2.
FIG. 4 is a schematic cross-sectional view of the dual layer fan blade shown in FIG. 3.
Description of the main elements
Double-layer fan blade 100
Receiving hole 11
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the present application provides a dual-layer fan blade 100, which includes a hub 10, a first fan blade 20, a second fan blade 30, and an air guiding ring 40.
The wind-guiding ring 40 is coaxially arranged with the hub 10, one end of the first fan blade 20 is connected with the outer peripheral surface of the hub 10, the other end of the first fan blade 20 is connected with the inner peripheral surface of the wind-guiding ring 40, one end of the second fan blade 30 is connected with the outer peripheral surface of the wind-guiding ring 40, and the other end of the second fan blade 30 is a free end.
From the air inlet side to the air outlet side, the distance between the outer peripheral surface of the hub 10 and the axis of the hub 10 is gradually increased to increase the volume of the inflow air at the air inlet side. Meanwhile, from the air inlet side to the air outlet side, the distance between the outer peripheral surface of the air guide ring 40 and the axis of the hub 10 is gradually increased and then gradually decreased so as to reduce the area of the air outlet side. Through the structure, the air speed can be improved, and the air supply distance is increased.
In this embodiment, the hub 10 is a truncated cone, and from the air inlet side to the air outlet side, the caliber of the hub 10 gradually increases.
Referring to fig. 2 and 3, the inclination angle a between the outer circumferential surface of the hub 10 and the axis of the hub 10 from the air inlet side to the air outlet side satisfies: 8 to 12 degrees.
The blades of the first fan blade 20 and the second fan blade 30 are both swept forward to increase the air flow, increase the air speed of the double-layer fan blade 100, and increase the air supply distance of the double-layer fan blade 100.
In this embodiment, the number of the first fan blades 20 is four, the four first fan blades 20 are uniformly distributed on the outer peripheral surface of the hub 10, and the difference between the airflow flowing areas of the air inlet side and the air outlet side of the double-layer fan blades 100 of the four first fan blades 20 is the largest, so that the wind speed of the double-layer fan blades 100 is increased, and the air supply distance of the double-layer fan blades 100 is increased.
The wind guide ring 40 comprises a drainage part 41 and a flow guide part 42 which are connected, the drainage part 41 is positioned on the wind inlet side, the flow guide part 42 is positioned on the wind outlet side, and the drainage part 41 and the flow guide part 42 are obliquely arranged. The flow guiding part 41 is used for guiding airflow to flow into the fan, and the flow guiding part 42 is used for guiding airflow to flow out of the fan, and enabling the airflow gathered at the air outlet side to form variable-section turbine type fluid so as to improve the conveying distance and the wind power of the airflow at the air outlet side.
In this embodiment, from the air inlet side to the air outlet side, the aperture of the flow guide portion 41 gradually increases, and from the flow guide portion 41 to the air outlet side, the aperture of the flow guide portion 42 gradually decreases.
Further, the distance between the end of the flow guiding part 41 far away from the flow guiding part 42 and the axis of the hub 10 is c, and the distance between the end of the flow guiding part 42 far away from the flow guiding part 41 and the axis of the hub 10 is d, wherein c > d, so as to increase the difference of the airflow flow areas of the air inlet side and the air outlet side, and further increase the wind force of the air flow of the air outlet side.
Referring to fig. 3 again, an included angle b between a connection line between one end of the flow guiding portion 41 away from the flow guiding portion 42 and one end of the flow guiding portion 42 away from the flow guiding portion 41 and the axis of the hub 10 satisfies: 8 to 12 degrees. Satisfy the double-deck flabellum 100 of this angle, both can increase the air inlet side and the air-out side the air current flow area's difference, can avoid the area of air-out side too little again, influence double-deck flabellum 100 to increase double-deck flabellum 100's wind speed, increase double-deck flabellum 100 air supply distance.
According to Bernoulli's theorem and the law of conservation of mechanical energy, the same driving member has the same power per unit time and the same kinetic energy. Wherein the kinetic energy is the energy that the object has due to motion, the kinetic energy is half of the product of the mass of the object and the square of the velocity, and the mass is equal to the density multiplied by the volume. According to the shape combination of the hub 10 and the wind guiding ring 40, a turbine type fluid as shown in fig. 4 is formed in the double-layer fan blade 100 to reduce the wind outlet area on the wind outlet side and the airflow flowing volume of the double-layer fan blade 100, and under the condition that the kinetic energy is the same, the density and the speed of the airflow are increased to increase the pressure and the speed of the airflow, so that the wind power is increased and the wind supply distance is longer.
Comparison experiment one:
the wheel hub and the wind-guiding circle of the double-layer fan blade are both cylindrical: the number of the inner fan blades is seven; the total air flow volume of the double-layer fan blade is 919800mm3The air flow volume between adjacent inner fan blades is 131400mm3。
In contrast, the hub 10 and the wind-guiding ring 40 of the double-layer fan blade 100 of the present embodiment have the shapes as described above: the number of the first fan blades 20 is seven; the total air flow volume of the double-layer fan blade 100 is 810817mm3The air flow volume between adjacent first fan blades 20 is 115831mm3。
Through comparative experiments, the double-layer fan blade 100 structure can reduce the air flow volume.
Comparative experiment two:
the hub and the wind guide ring of the double-layer fan blade are both cylindrical; the number of the fan blades is four; hollow of double-layer fanThe total volume of air flow is 937112mm3The air flow volume between adjacent unit fan blades is 234278mm3。
In contrast, the hub 10 and the wind guiding ring 40 of the double-layer fan blade 100 of the present embodiment have the shapes as described above, the number of the first fan blades 20 is four, and the total volume of the air flowing of the double-layer fan blade 100 is 831280mm3The air flow volume between adjacent first fan blades 20 is 207820mm3。
In contrast, the double-layer fan blade 100 structure of the present invention can reduce the air flow volume.
A third comparative experiment:
the hub and the wind guide ring of the double-layer fan blades are cylindrical, and the number of the inner fan blades is seven; the air flow area of the air inlet side of the double-layer fan blade is 27125mm2The air flow area at the air outlet side is 27666mm2The air flow area on the air inlet side is 2% larger than that on the air outlet side.
In contrast, the hub 10 and the wind guiding ring 40 of the double-layer fan blade 100 of the present embodiment have the shapes as described above, the number of the first fan blades 20 is seven, and the air flow area on the wind inlet side of the double-layer fan blade 100 is 26654mm2The air flow area of the air outlet side is 21677mm2The air flow area on the air inlet side is 18.7% larger than that on the air outlet side.
In comparison, the air flow area of the air outlet side in the double-layer fan blade 100 structure is smaller than that of the air inlet side, and the difference range of the air outlet side and the air inlet side is increased.
And a fourth comparative experiment:
the wheel hub and the wind-guiding circle of the double-layer fan blade are both cylindrical: the number of the inner fan blades is four; the air flow area of the air inlet side of the double-layer fan blade is 28132mm2The air flow area on the air outlet side is 27973mm2The air flow area of the air inlet side is 0.6 percent larger than that of the air outlet side.
In contrast, the hub 10 and the wind-guiding ring 40 of the double-layer fan blade 100 of the present embodiment are as described above, and the number of the first fan blades 20 is four; the air flow area of the air inlet side of the double-layer fan blade 100 is 27444mm2The air flow area of the air outlet side is 21925mm2The air flow area of the air inlet side is 20.1 percent larger than that of the air outlet side.
In contrast, in the structure of the double-layer fan blade 100, the air flow area on the air outlet side is smaller than the air flow area on the air inlet side, and the difference range is the largest when the number of the first fan blades 20 is four.
A fifth comparative experiment:
in the comparative example, the hub and the wind-guiding ring of the double-layer fan blade are both cylindrical: the number of the inner fan blades is four, wherein the wind speed is v2, and the unit of the wind speed is m/min, namely meter/min; the power is P2 in units of W.
The hub 10 and the wind guide ring 40 of the double-layer fan blade 100 are shaped as above, the number of the first fan blades 20 is four, wherein the wind speed is v1, and the unit of the wind speed is m/min, namely meter/min; the power is P1 in units of W.
Table 1 comparative experiment five
| Rotational speed (rpm) | 300 | 400 | 500 | 700 | 880 |
| Wind speed v1(m/min) | 10 | 25 | 40 | 70 | 97 |
| Wind speed v2(m/min) | 9 | 22 | 36 | 63 | 87 |
| Power p1(W) | 2.2 | 2.6 | 4.0 | 10.2 | 19.4 |
| Power p2(W) | 2.1 | 2.5 | 3.9 | 10.0 | 19.0 |
| Power difference (%) | 6.06 | 3.88 | 2.53 | 2.05 | 2.16 |
| Difference in wind speed (%) | 13.45 | 12.27 | 11.98 | 11.78 | 11.70 |
As can be seen from table 1, the double-layer fans in the present embodiment and the comparative embodiment have the same rotation speed, the wind speed in the present embodiment is significantly higher than that of the double-layer fan in the comparative embodiment, the power consumption difference per unit time is smaller, and the power consumption difference per unit time is smaller as the rotation speed increases.
The present application also provides a fan (not shown) comprising the dual-layer fan blade 100.
Further, the fan further includes a driving member (not shown) connected to the hub 10, the driving member being used for driving the hub 10 to rotate, such as a motor.
The hub 10 is provided with a receiving hole 11, and the driving member is at least partially received in the receiving hole 11.
Compare traditional fan, under the same power effect, the fan of this application passes through wheel hub 10 and wind-guiding circle 40 to realize that the air-out side becomes cross-section turbine type fluid structure, thereby improve the wind speed by 10% at least.
Compared with the traditional fan, the power consumed by the fan per unit time is approximately the same.
The application provides a double-deck flabellum 100 passes through the design of wheel hub 10's truncated cone to reduce the area of air-out side, increase double-deck flabellum 100's wind degree and air supply distance.
Through the inclined bending arrangement of the wind guide ring 40, the area difference between the air outlet side and the air inlet side is increased by matching with the hub 10, so that the air supply distance and the air speed of the air flow at the air outlet side under the preset power are increased.
In addition, other changes may be made by those skilled in the art without departing from the spirit of the invention, and it is intended that all such changes be considered within the scope of the invention.
Claims (10)
1. A double-layer fan blade is characterized by comprising a hub, a first fan blade, a second fan blade and an air guide ring;
the wind guide ring is coaxially arranged with the hub, one end of the first fan blade is connected with the outer peripheral surface of the hub, the other end of the first fan blade is connected with the inner peripheral surface of the wind guide ring, one end of the second fan blade is connected with the outer peripheral surface of the wind guide ring, and the other end of the second fan blade is a free end;
from the air inlet side to the air outlet side, the distance between the outer peripheral surface of the hub and the axis of the hub is gradually increased.
2. The double-layer fan blade as claimed in claim 1, wherein the hub is in a truncated cone shape, and the inclination angle a between the outer circumferential surface of the hub and the axis of the hub satisfies: 8 to 12 degrees.
3. The dual layer fan blade of claim 1 wherein the blades of both said first fan blade and said second fan blade are forward swept.
4. The dual-layer fan blade as claimed in claim 3, wherein the number of the first fan blades is four, and four first fan blades are uniformly distributed on the outer circumferential surface of the hub.
5. The double-layer fan blade as claimed in claim 1, wherein the air guiding ring comprises a flow guiding part and a flow guiding part which are connected, the flow guiding part is located on one side of an air inlet side, the flow guiding part is located on one side of an air outlet side, and the flow guiding part are arranged in an inclined manner.
6. The dual-layer fan blade as claimed in claim 5, wherein the diameter of the flow guiding portion increases gradually from the air inlet side to the flow guiding portion, and the diameter of the flow guiding portion decreases gradually from the flow guiding portion to the air outlet side.
7. The dual layer fan blade as claimed in claim 6, wherein the distance between the end of the flow guiding portion away from the flow guiding portion and the axis of the hub is c, and the distance between the end of the flow guiding portion away from the flow guiding portion and the axis of the hub is d, wherein c > d.
8. The double-layer fan blade as claimed in claim 7, wherein an included angle b between a connecting line between one end of the flow guide part far from the flow guide part and the axis of the hub satisfies: 8 to 12 degrees.
9. A fan comprising a double-layer fan blade as claimed in any one of claims 1 to 8.
10. The fan as claimed in claim 9, further comprising a driving member, wherein the hub is provided with a receiving hole, and the driving member is at least partially received in the receiving hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020116108.8U CN212155257U (en) | 2020-01-17 | 2020-01-17 | Double-layer fan blade and fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020116108.8U CN212155257U (en) | 2020-01-17 | 2020-01-17 | Double-layer fan blade and fan |
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| CN212155257U true CN212155257U (en) | 2020-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023202327A1 (en) * | 2022-04-18 | 2023-10-26 | 续新电器技术(深圳)有限公司 | Combined fan blade structure and air outlet device |
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- 2020-01-17 CN CN202020116108.8U patent/CN212155257U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023202327A1 (en) * | 2022-04-18 | 2023-10-26 | 续新电器技术(深圳)有限公司 | Combined fan blade structure and air outlet device |
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