CN217206638U - Double-steering fan blade structure - Google Patents

Abstract

A dual-steering fan blade structure comprises a hub, a plurality of blades symmetrically arranged around the hub, a front guide plate and a rear guide plate. Each blade extends in the axial direction and comprises an air inlet end and an air outlet end. The air inlet end is provided with an air inlet end included angle, and the air outlet end is provided with an air outlet end included angle; the front guide plate is arranged on the protruded edges of the air inlet ends of the blades and is provided with a front guide plate included angle, and the rear guide plate is arranged on the protruded edges of the air outlet ends of the blades and is provided with a rear guide plate included angle; the outer edge diameter of the rear guide plate is defined by the joint of the blades and the outer edge of the rear guide plate, the inner edge diameter of the front guide plate is defined by the joint of the blades and the inner edge of the front guide plate, and the outer edge diameter of the rear guide plate is smaller than the inner edge diameter of the front guide plate.

Description

Double-steering fan blade structure

Technical Field

The present invention relates to a dual-turning fan blade structure, and more particularly, to a dual-turning fan blade structure capable of increasing axial air output.

Background

Referring to fig. 1A-1B, fig. 1A shows a schematic diagram of a motor-driven all-in-one machine and a conventional fan disposed at one end thereof, and fig. 1B shows a schematic diagram of the conventional fan in fig. 1A. As shown in fig. 1A-1B, a plurality of heat dissipation fins 121 and a fan 13 mounted on a rotating shaft 14 are disposed on one side of a motor-driven integrated machine 1 composed of a motor 11 and a driver 12, and when the motor-driven integrated machine 1 is operated, the fan 13 is driven by the rotating shaft 14 to generate an air flow, so as to improve the heat dissipation effect of the heat dissipation fins 121. However, according to the structure of the fan 13, after entering the fan 13, most of the airflow is discharged in a centrifugal direction (as shown by arrows in the figure) along the structure of the blades 131 and accumulated at the radial side edge of the fan 13, and is not easy to reach the heat dissipation fins 121 axially connected behind the fan 13, resulting in poor heat dissipation effect; in addition, since the fan 13 is covered in the fan housing 15 of the all-in-one motor-driven machine 1, airflow entering the fan housing 15 is likely to generate backflow at a contact position (as indicated by a dotted circle line in the figure) with the fan housing 15, which affects the operation efficiency of the fan 13 and also affects the heat dissipation effect.

Therefore, there is a need to develop a new dual-turning fan blade structure to solve the above-mentioned problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The purpose of this case is to provide a two-turn fan blade structure, and it reaches the effect that increases axial air-out and promote the heat-sinking capability through structural design.

Another objective of the present invention is to provide a dual-turning fan blade structure, which achieves the effects of optimizing the airflow direction and increasing the operating efficiency of the fan blade structure through the design of the shape of the blades and the arrangement of the front and rear deflectors.

To achieve the above objective, the present disclosure provides a dual-turning fan blade structure, which includes a hub, a plurality of blades symmetrically disposed around the hub, a front guide plate, and a rear guide plate. The hub is connected with an external rotating shaft, and the rotating shaft defines an axial direction; each blade extends in the axial direction and comprises an air inlet end and an air outlet end; the air inlet end protrudes towards the front end of the introduced airflow and comprises a first protruding edge connected with the hub, and an air inlet end included angle is formed between the first protruding edge and a radial plane perpendicular to the axial direction on the hub; the air outlet end protrudes towards the rear end of the air flow, and comprises a third protruding edge connected to the hub and a fourth protruding edge connected to the outer edge and the third protruding edge, and an air outlet end included angle is formed between the air outlet end and the third protruding edge. The front guide plate is arranged and connected with the plurality of second protruding edges, a front guide plate included angle is formed between each second protruding edge and the corresponding first protruding edge, the rear guide plate is arranged and connected with the plurality of third protruding edges, a rear guide plate included angle is formed between each third protruding edge and the radial plane, the outer edge diameter of a rear guide plate is defined at the joint of the plurality of fourth protruding edges and the outer edge of the rear guide plate, the inner edge diameter of a front guide plate is defined at the joint of the plurality of first protruding edges and the inner edge of the front guide plate, and the outer edge diameter of the rear guide plate is smaller than the inner edge diameter of the front guide plate.

In one embodiment, the first protruding edge has one end connected to the hub and the other end extending toward the front end and away from the hub in axial and radial directions to define the wind inlet end included angle with the hub.

In one embodiment, the third protruding edge has one end connected to the hub and the other end extending toward the rear end and axially and radially away from the hub to define the rear baffle angle with the hub.

In one embodiment, the front flow guide plate is a hollow annular disk-shaped structure.

In one embodiment, the rear baffle is a hollow annular disk-like structure.

In one embodiment, the plurality of blades, the front baffle, and the rear baffle are integrally formed.

In one embodiment, the included angle of the air inlet end is 100-150 degrees.

In one embodiment, the included angle of the front baffle plate is 70-120 degrees.

In one embodiment, the included angle of the rear baffle is in the range of 100 degrees and 150 degrees.

In one embodiment, the included angle of the air outlet end ranges from 70 degrees to 120 degrees.

Drawings

FIG. 1A is a schematic diagram of a motor-driven all-in-one machine and a conventional fan disposed at one end thereof;

FIG. 1B is a schematic view of the conventional fan shown in FIG. 1A;

fig. 2A shows a schematic view of a dual-steering fan blade structure according to an embodiment of the present disclosure;

FIG. 2B shows a cross-sectional view of plane A-A' of FIG. 2A;

FIG. 2C is a schematic view of the hub and blade structure indicated by block T in FIG. 2B;

FIG. 3A is a top view of the dual turning vane structure of the present embodiment from the direction of the wind;

FIG. 3B is a side view of the dual turning vane structure according to the present embodiment;

fig. 4 is a schematic view illustrating the airflow direction when the dual-steering fan structure of the embodiment operates.

[ description of symbols ]

1: motor drive all-in-one

11: motor with a stator having a stator core

12: driver

121: heat radiation fin

13: fan with cooling device

131: blade

14: rotating shaft

15: wind shield

2: double-steering fan blade structure

21: wheel hub

211: front side

212: rear side

22: blade

221: air inlet end

2211: first protruding edge

2212: second protruding edge

222: air outlet end

2221: third protruding edge

2222: fourth flange

223: outer edge

23: front deflector

231: inner edge

232: junction area

24: rear deflector

241: outer edge

Detailed Description

Exemplary embodiments that embody features and advantages of this disclosure are described in detail below in the detailed description. It will be understood that the present disclosure is capable of various modifications without departing from the scope of the disclosure, and that the description and drawings are to be taken as illustrative in nature and not as limiting.

Referring to fig. 2A-2C, fig. 3A-3B, and fig. 4, fig. 2A shows a schematic view of a dual-turning fan blade structure of the present embodiment, fig. 2B shows a cross-sectional view of a plane a-a' in fig. 2A, fig. 2C shows a detailed structural view of a hub and blades marked by a square frame T in fig. 2B, fig. 3A shows a top view of the dual-turning fan blade structure of the present embodiment from an incoming wind direction, fig. 3B shows a side view of the dual-turning fan blade structure of the present embodiment, and fig. 4 shows a schematic view of an airflow direction when the dual-turning fan blade structure of the present embodiment operates. The present dual-turning fan blade structure 2 includes a hub 21, a plurality of blades 22, a front flow guiding plate 23, and a rear flow guiding plate 24, wherein the hub 21 is connected to an external rotating shaft (not shown), for example, the rotating shaft 14 of the motor-driven all-in-one machine 1 shown in fig. 1A, and the rotating shaft provides rotating power, so the present dual-turning fan blade structure 2 has a rotating central shaft (i.e., the rotating shaft), and the plurality of blades 22 are symmetrically disposed around the outer periphery of the hub 21 (please refer to fig. 3A at the same time), i.e., the plurality of blades 22 are symmetrically disposed with the rotating central shaft as the center, so that the dual-turning fan blade structure 2 has no rotation direction limitation, can change the rotating direction according to the rotating shaft, and can drive airflow no matter whether rotating forward or reverse, and maintain the same fan performance.

In this case, a direction substantially parallel to the rotation center axis of the dual turning vane structure 2 is defined as an axial direction, and directions perpendicular to the axial direction and passing through the rotation center axis are defined as radial directions, and a plane perpendicular to the rotation center axis is defined as a radial plane, that is, the radial plane is perpendicular to the axial direction, or a normal of the radial plane is parallel to the axial direction. It should be noted that a plurality of radial planes may be taken along the axial direction, such that the radial planes intersect with the hub 21, the blades 22, the front baffle 23, and the rear baffle 24 to define a plurality of included angles, which will be described later.

As shown by the arrows in fig. 4, when the dual turning fan blade structure 2 rotates, the airflow is guided into the dual turning fan blade structure 2 from the right side in the figure and then guided out towards the left side in the figure, so that the right side (air inlet side) shown in fig. 4 is further defined as the front end of the dual turning fan blade structure 2, and the left side (air outlet side) shown in fig. 4 is the rear end of the dual turning fan blade structure 2, in other words, the front end of the dual turning fan blade structure 2 is the end into which the airflow is guided, and the rear end of the dual turning fan blade structure 2 is the end from which the airflow is guided out. Accordingly, the side of the hub 21 facing the front end is defined as a front side 211, and the side facing the rear end is defined as a rear side 212 (as shown in fig. 2B).

Please refer to fig. 2A-2C and fig. 3A-3B. Besides being symmetrically arranged along the radial direction of the hub 21, each of the blades 22 also extends along the axial direction of the hub 21 and has a shape change, wherein each of the blades 22 includes an air inlet end 221 and an air outlet end 222, the air inlet end 221 protrudes toward the front end of the dual turning blade structure 2 for air flow introduction, and the air outlet end 222 protrudes toward the rear end of the dual turning blade structure 2 for air flow discharge, that is, the air inlet end 221 and the air outlet end 222 protrude in opposite directions.

The inlet end 221 includes a first flange 2211 and a second flange 2212. One end of the first protruding edge 2211 is connected to the hub 21, and the other end extends from the front side 211 of the hub 21 toward the front end of the dual-turning fan blade structure 2, and both the axial direction and the radial direction are away from the hub 21, and an included angle a is formed between the extending direction and the front side 211 of the hub 21, in other words, the first protruding edge 2211 forms an included angle a with a radial plane perpendicular to the axial direction on the hub 21, and the included angle a is defined as an included angle a of the wind inlet end 221 of the blade 22.

In addition, the second protrusion edge 2212 extends from the extending end of the first protrusion edge 2211 in a direction radially away from the hub 21 and axially toward the rear end of the dual-vane structure 2, and intersects with an outer edge 223 of the vane 22 in the radial direction to connect the first protrusion edge 2211 and the outer edge 223, so that an included angle B is formed between the first protrusion edge 2211 and the second protrusion edge 2212, wherein the outer edge 223 refers to the radially outermost edge of the vane 22. As shown in fig. 2A and 2B, the front deflector 23 is disposed and connected to the plurality of second protruding edges 2212 of the plurality of blades 22, so that the included angle B is also formed between the front deflector 23 and each of the first protruding edges 2211, and thus the included angle B is defined as a front deflector included angle B.

Compared with the blades 131 of the conventional fan 13 shown in fig. 1B, each blade 22 of the present invention has a protruding wind inlet end 221 at a portion facing the front end (i.e., the wind inlet side) of the dual-blade structure 2, and thus forms the wind inlet end included angle a with the front side 211 of the hub 21, and the formation of the wind inlet end 221 and the wind inlet end included angle a not only increases the wind inlet area, the wind volume, and the like, but also helps to control the airflow direction flowing into the dual-blade structure 2; in addition, compared with the conventional fan 13, the dual-turning fan blade structure 2 of the present invention further adds the front baffle plate 23 and forms the front baffle plate included angle B, so that the air flow entering the fan housing of the motor-driven all-in-one machine 2 can be effectively reduced to the phenomenon of backflow at the inlet due to the guidance of the front baffle plate 23.

Furthermore, the air outlet end 222 includes a third protrusion 2221 and a fourth protrusion 2222. The third protruding edge 2221 has one end connected to the hub 21 and the other end extending from the rear side 212 of the hub 21 toward the rear end of the dual-blade structure 2 in a direction away from the hub 21 in both the axial direction and the radial direction, and an included angle C is formed between the extending direction and the rear side 212 of the hub 21, in other words, an included angle C is formed between the third protruding edge 2221 and a radial plane perpendicular to the axial direction of the hub 21; as shown in fig. 2A and 2B, the rear baffle 24 is disposed and connected to the third protruding edges 2221 of the blades 22, so that the included angle C is also formed between the rear baffle 24 and the rear side 212 of the hub 21, and thus the included angle C is defined as a rear baffle included angle C.

In addition, the fourth protruding edge 2222 extends from the extending end of the third protruding edge 2221 in a direction radially away from the hub 21 and axially toward the front end of the dual turning vane structure 2, and intersects with the outer edge 223 of the vane 22 to connect the third protruding edge 2221 and the outer edge 223, so that an included angle D is formed between the third protruding edge 2221 and the fourth protruding edge 2222, and the included angle D is defined as an air outlet end included angle D because the included angle D is the included angle of the vane 22 at the air outlet end 222.

Compared to the blade 131 of the conventional fan 13 shown in fig. 1B, each blade 22 of the present disclosure further adds the fourth protruding edge 2222 to the portion facing the rear end (i.e., the air outlet side) of the dual-blade structure 2, and thus forms the air outlet included angle D, and the air outlet end included angle D formed is matched with the rear guide plate 24 and the rear guide plate included angle C thereof, the direction of the airflow discharged from the dual-turning fan blade structure 2 can be controlled, so that a larger proportion of the airflow is blown into the heat dissipation fins arranged at the rear end of the dual-turning fan blade structure along the axial direction, a smaller proportion of the airflow flows along the radial direction, so that the heat dissipation fins or the motor (not shown) connected to the rear end of the dual-turning fan blade structure 2 can obtain better heat dissipation effect, and further prevent the air-out backflow phenomenon that may appear at the same time, also make the whole air current flow more smooth and more efficient in the operation of the fan.

Furthermore, in order to further increase the amount of air blown into the heat dissipation fins disposed at the rear end of the dual turning vane structure 2, i.e., increase the axial outlet air, as shown in fig. 3A-3B, the outer edge diameter d1 of the rear deflector defined by the intersection 242 of the fourth protruding edges 2222 of the vanes 22 and the outer edge 241 of the rear deflector 24 is smaller than the inner edge diameter d2 of the front deflector defined by the intersection 232 of the first protruding edges 2211 of the vanes 22 and the inner edge 231 of the front deflector 23, more specifically, the projected diameter of the outer edge 241 of the rear deflector 24 on a radial plane perpendicular to the axial direction is d1, and the projected diameter of the inner edge 231 of the front deflector 23 on a radial plane perpendicular to the axial direction is d2, wherein d1 is smaller than d2, and the distance between d1 and d2 is 2 Δ d. Through the distance difference 2 Δ d, when the airflow enters from the front end of the dual turning fan blade structure 2, is guided by the air inlet ends 221 of the plurality of blades 22 and the front baffle plate 23, and is discharged toward the rear end of the dual turning fan blade structure 2, the airflow guided in the axial direction can be effectively increased, and further, the air volume reaching the heat dissipation fins can be increased; in other words, under the condition that the rear air deflector 24 has the rear air deflector included angle C, and the design that the diameter d1 of the outer edge of the rear air deflector is smaller than the diameter d2 of the inner edge of the front air deflector is matched, the air flow entering the dual-turning fan blade structure 2 can have more axial air outlet, and the heat dissipation effect is effectively improved.

When the dual-turning fan blade structure 2 is implemented, the included angles may be changed according to actual requirements, for example, the included angles may be adjusted according to requirements of changing air inlet amount, air inlet angle, air outlet amount, air outlet angle, axial air outlet amount, and the like. For example, the applicable angle range of the air inlet end included angle a is 100-150 degrees, the applicable angle range of the front baffle included angle B is 70-120 degrees, the applicable angle range of the rear baffle included angle C is 100-150 degrees, and the applicable angle range of the air outlet end included angle D is 70-120 degrees. Therefore, the result most suitable for the practical use purpose, such as larger air inlet amount, larger axial air outlet amount, better heat dissipation effect and the like, can be obtained through the mutual matching of all the angles, and the advantage of flexible change is achieved.

In addition, the front flow guiding plate 23 is disposed on the second protruding edges 2212 of the blades 22, so that it is preferable that the front flow guiding plate 23 is formed as a hollow annular disk-shaped structure and is integrally formed with the blades 22; also preferably, the rear baffle 24 disposed on the third protruding edges 2221 of the blades 22 may be formed as a hollow annular disc-shaped structure and integrally formed with the blades 22; still further, the plurality of blades 22, the front baffle 23, and the rear baffle 24 may be integrally formed, so that they may be optimally used according to actual manufacturing processes without limitation. Also, the number of the blades 22 can be changed according to the actual use requirement, and it is only necessary to achieve symmetry centering on the hub 21 when setting up, and ensure the dual-steering operation, and there is no limitation as well.

In summary, the dual-turning fan blade structure of the present disclosure is provided with the air inlet end and the air outlet end on the blade, and forms the included angle of the air inlet end and the included angle of the air outlet end, and then the front guide plate and the rear guide plate are cooperatively provided, and forms the included angle of the front guide plate and the included angle of the rear guide plate, so that various effects of increasing axial air outlet and inhibiting backflow at the inlet and the outlet can be comprehensively obtained through the cooperation of the angles between the included angles, and an optimal heat dissipation design for the motor-driven all-in-one machine is further achieved.

It should be noted that the above-mentioned embodiments illustrate only the preferred embodiments of the present disclosure, and the present disclosure is not limited to the above-mentioned embodiments, and the scope of the present disclosure is determined by the appended claims. And such modifications may be made by those skilled in the art without departing from the scope of the appended claims.

Claims (10)

1. A dual turning vane structure, comprising:

a hub connected to an external shaft defining an axial direction;

a plurality of blades symmetrically disposed around the hub, wherein each of the blades extends in the axial direction and includes:

an air inlet end projecting toward a front end of the incoming air stream and comprising:

the first protruding edge is connected with the hub, and an air inlet end included angle is formed between the first protruding edge and a radial plane which is perpendicular to the axial direction on the hub; and

a second protruding edge connecting an outer edge of the blade with the first protruding edge; and

an air outlet end, protruding towards a rear end of the derived air flow, and comprising:

a third protruding edge connected to the hub; and

a fourth protruding edge connecting the outer edge and the third protruding edge, and having an air outlet end included angle with the third protruding edge;

a front flow guiding plate, which is arranged and connected with the plurality of second protruding edges, and an included angle of the front flow guiding plate is formed between each second protruding edge and the corresponding first protruding edge; and

a rear guide plate, which is arranged and connected with the plurality of third protruding edges, and an included angle of the rear guide plate is arranged between each third protruding edge and the radial plane,

the junction of the fourth protruding edges and the outer edge of the rear guide plate defines the diameter of the outer edge of the rear guide plate, the junction of the first protruding edges and the inner edge of the front guide plate defines the diameter of the inner edge of the front guide plate, and the diameter of the outer edge of the rear guide plate is smaller than the diameter of the inner edge of the front guide plate.

2. The dual turning vane structure of claim 1 wherein the first flange is connected at one end to the hub and extends at the other end toward the front end and axially and radially away from the hub to define the angle with the hub at the wind inlet end.

3. The dual turning vane structure of claim 1 wherein the third flange is connected at one end to the hub and extends at the other end toward the rear end and axially and radially away from the hub to define the rear baffle angle with the hub.

4. The dual turning fan blade structure of claim 1 wherein the front baffle is a hollow annular disk-like structure.

5. The dual rotor blade structure of claim 1 wherein said rear baffle is a hollow annular disk-like structure.

6. The dual turning vane structure of claim 1 wherein the plurality of vanes, the front deflector, and the rear deflector are integrally formed.

7. The dual turning fan blade structure of claim 1, wherein the included angle of the wind inlet end is within the range of 100-150 degrees.

8. The dual turning fan blade structure of claim 1, wherein the included angle of the front baffle is in the range of 70-120 degrees.

9. The dual turning vane structure of claim 1 wherein the included angle of the rear baffle is in the range of 100-150 degrees.

10. The dual turning fan blade structure of claim 1, wherein the included angle of the air outlet end is in the range of 70-120 degrees.

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