CN217682366U - Fan wheel and cooling fan with same - Google Patents

Abstract

The utility model provides a fan wheel and have radiator fan of this fan wheel for solve the smooth and easy degree of current fan wheel air current flow and lead to the amount of wind to be difficult to the problem that promotes. The method comprises the following steps: a rotating shaft; a hub connected to the rotating shaft; and a plurality of fan blades arranged around the hub, each fan blade is provided with a backward swept section and a forward swept section, each backward swept section is connected with the hub, the extending direction of the forward swept section is the same as the rotating direction of the fan wheel, the extending direction of the backward swept section is opposite to the rotating direction of the fan wheel, each fan blade is provided with a reverse curve point connected between the forward swept section and the backward swept section, the reverse curve point and the backward swept section have a first maximum straight line length, the reverse curve point and the forward swept section have a second maximum straight line length, and the ratio of the first maximum straight line length to the second maximum straight line length is 0.3-0.8.

Description

Fan wheel and cooling fan with the fan wheel

technical field

The utility model relates to a wind driving device, in particular to a fan wheel and a cooling fan with the fan wheel.

Background technique

The existing fan wheel can be connected to a hub by a rotating shaft. The hub has a side wall, and a plurality of fan blades of the fan wheel are respectively connected to the outer wall of the side wall by one end. Each fan blade has a swept back section and a swept forward section. segment, the swept segment can be closer to the hub than the forward segment; thus, the cooling fan with the existing fan wheels can be assembled and positioned in systems such as laptops, air conditioners or ventilation equipment, so as to use the plurality of fans The leaves drive the wind to create air flow.

Although the above-mentioned existing fan wheels can be used to drive the airflow; however, since the size ratio of the swept back section and the forward swept section is not particularly optimized, the airflow between the plurality of fan blades is relatively turbulent, causing the airflow to enter and exit the fan. The flow smoothness of the fan is not good, which makes it difficult to effectively increase the air volume of the existing fan wheel.

In view of this, existing fan wheel really still needs to be improved.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide a fan wheel and a cooling fan with the fan wheel, which can increase the air volume and save energy.

The second object of the present invention is to provide a fan wheel and a cooling fan with the fan wheel, which can reduce the vibration or deformation of the fan blades due to the influence of air resistance.

Another object of the utility model is to provide a fan wheel and a cooling fan with the fan wheel, which can make the airflow flow smoothly.

Another object of the present invention is to provide a fan wheel and a cooling fan with the fan wheel, which can reduce the manufacturing cost.

Directionality or similar terms mentioned throughout the present invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer ", "side", etc., mainly refer to the direction of the accompanying drawings, and each direction or its approximate terms are only used to assist in explaining and understanding the various embodiments of the present utility model, and are not intended to limit the present utility model.

The components and components described throughout the utility model use the quantifier "a" or "one", only for convenience and to provide the general meaning of the scope of the utility model; it should be interpreted as including one or at least one in the utility model , and the singular concept also includes the plural, unless it clearly means otherwise.

Approximate terms such as "combination", "combination" or "assembly" mentioned in the entirety of this utility model mainly include the separation of the components without destroying them after the connection, or the inseparable components after the connection, etc., which are common knowledge in the art One can be selected according to the material of the components to be connected or assembly requirements.

The fan wheel of the present utility model comprises: a rotating shaft; a hub connected to the rotating shaft; and a plurality of fan blades arranged around the hub, each fan blade has a swept back section and a forward swept section, and each swept section is connected to In the hub, the extension direction of the forward sweep section is the same as the rotation direction of the fan wheel, the extension direction of the sweep section is opposite to the rotation direction of the fan wheel, and each fan blade has an inflection point connected to the forward sweep section and the rotation direction of the fan wheel. Between the swept sections, the inflection point has a first maximum linear length to the swept section, and the inflection point to the forward-swept section has a second maximum linear length, and the first maximum linear length is the same as the first maximum linear length. The ratio of the two maximum straight line lengths is 0.3 to 0.8.

The cooling fan of the present utility model includes: a fan frame with a base, and the base has a shaft tube; a stator, located on the outer periphery of the shaft tube; and a fan wheel as mentioned above, which is rotatable set on the shaft tube.

Therefore, the fan wheel of the present invention and the cooling fan with the fan wheel have the first maximum straight line length from the inflection point to the swept back section, and the second largest straight line length from the inflection point to the forward swept section. length, and the ratio of the first maximum linear length to the second maximum linear length is 0.3 to 0.8, which can ensure that the airflow swirled by the plurality of fan blades is relatively unimpeded, even if the motor is at a low speed, the plurality of fan blades The leaves can also generate effective air flow to maintain a predetermined air volume, which can increase the air volume and save energy.

Wherein, each forward-swept segment may be arc-shaped. In this way, it has the effect of enabling the plurality of fan blades to maintain a predetermined air volume.

Wherein, each forward-swept segment may be in the shape of a cycloid. In this way, it has the effect of enabling the plurality of fan blades to maintain a predetermined air volume.

Wherein, each swept-back segment may be in the shape of an arc or a straight line. In this way, the structure is simple and easy to manufacture, and has the effect of reducing manufacturing cost.

Wherein, each fan blade may have an proximal end connected to the hub, the swept back section may have a first tangent passing through the proximal end, the forward swept section may have a second tangent passing through the proximal end, and the first swept section may have a second tangent passing through the proximal end. There may be an included angle between the tangent line and the second tangent line, and the included angle may be greater than or equal to 15 degrees and less than or equal to 55 degrees. In this way, when the fan wheel rotates, it can maintain a better wind pressure and air volume, which has the effect of improving the wind-dispelling performance.

Wherein, the included angle may be greater than or equal to 15 degrees and less than or equal to 35 degrees. In this way, when the fan wheel rotates, it can maintain better wind pressure and air volume, which has the effect of improving the wind-dispelling performance.

Wherein, each blade may have a proximal end and a distal end, the swept-back section of each blade may be adjacent to the proximal end, and the forward-swept section of each blade may be adjacent to the distal end. In this way, the airflow can easily flow out from the distal end of the fan blade, which has the effect of making the airflow flow smoothly.

Wherein, there may be a first distance between the proximal ends of two adjacent blades, and a second distance between the distal ends of two adjacent blades, and the ratio of the second distance to the first distance may be 1.2-3. In this way, there can be enough space for the airflow to pass through, which has the effect of making the airflow flow smoothly.

Wherein, the hub may have a ring wall connected to a periphery of a board body, and the plurality of fan blades may be combined with the ring wall. In this way, the structure is simple and easy to manufacture, and has the effect of reducing manufacturing cost.

Wherein, the ring wall may have an extension portion extending radially outward from the ring wall, and the plurality of fan blades are connected to the extension portion. In this way, the plurality of fan blades can form a relatively large combined area with the ring wall of the hub by means of the extension portion, which has the effect of stably combining the plurality of fan blades with the hub.

Wherein, the surrounding wall may have a height of the surrounding wall, and each fan blade may have a distal end, and each fan blade may have a distal height at the distal end, and the distal height may be greater than or equal to the height of the surrounding wall. 1/2. In this way, it has the effect of enabling the plurality of fan blades to generate a larger air volume.

Wherein, each fan blade may have a proximal end and a distal end, and the plate body, the proximal end and the distal end may be located at different levels. In this way, it has the effect of simple structure and convenient assembly.

Wherein, the highest point of the plate body may be higher than the highest point of the distal end, and the highest point of the distal end may be higher than the highest point of the proximal end. In this way, it has the effect of providing a larger air guide volume.

The fan wheel of the present invention may additionally include a connecting ring, and the connecting ring connects the forward-swept sections of the plurality of fan blades. In this way, the connecting ring can stabilize the positions of the plurality of fan blades, prevent each fan blade from swaying under high-speed operation, and has the effect of reducing vibration or deformation of each fan blade due to the influence of air resistance.

Description of drawings

Figure 1: an exploded perspective view of a preferred embodiment of the utility model cooling fan;

Figure 2: Plane view of the first embodiment of the fan wheel of the present utility model;

Figure 3: An enlarged view of the local structure as shown in Figure 2;

Figure 4: Sectional view along line A-A of Figure 3;

Fig. 5: A partially enlarged plan view of the fan wheel of the present invention with the swept section in a straight line;

Fig. 6: A perspective view of the second embodiment of the fan wheel of the present invention.

Explanation of reference signs

【This utility model】

1: Shaft

2: hub

21: ring wall

211: Extension

22: board body

3: fan blade

3a: proximal end

3b: distal end

3c: top edge

3d: bottom edge

31: Swept back section

32: Swept forward

33: Inflection point

4: Connection ring

5: fan frame

51: base

511: shaft tube

6: Stator

B1: first spacing

B2: second spacing

C: axis

D1: The first maximum straight line length

D2: The second largest straight line length

H1: Height of surrounding wall

H2: height of abaxial axis

L1: first tangent

L2: second tangent

K: direction of rotation

P: fan wheel

θ: included angle.

Detailed ways

In order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the preferred embodiments of the present utility model are listed below, and are described in detail in conjunction with the accompanying drawings; in addition, the same symbols are marked in different drawings are considered the same, and their descriptions will be omitted.

Please refer to Figure 2, which is the first embodiment of the fan wheel P of the present invention, including a rotating shaft 1, a hub 2 and a plurality of fan blades 3, the hub 2 is connected to the rotating shaft 1, and the plurality of fan blades 3 is set around the hub 2.

Please refer to Fig. 1 and Fig. 2, the rotating shaft 1 can have an axis C, and the rotating shaft 1 can smoothly drive the rotation of the whole fan wheel P as a prerequisite. be restricted.

Please refer to Fig. 2 and Fig. 4, the central part of the hub 2 can be combined with the rotating shaft 1, and the present invention does not limit the material of the hub 2 and the structure and manner in which the hub 2 is connected to the rotating shaft 1. For example, the hub 2 can be combined with the rotating shaft 1 by injection coating, or combined with the rotating shaft 1 by tight fit or laser welding. In this embodiment, the hub 2 can be made of metal, and can be combined with the The rotating shaft 1 is combined by laser welding, so that the hub 2 and the rotating shaft 1 can be firmly combined. The hub 2 can have a ring wall 21 and a plate body 22, the rotating shaft 1 is connected to the plate body 22, the ring wall 21 is connected to the periphery of the plate body 22, the ring wall 21 can have a ring wall height H1, the The surrounding wall 21 can be used to combine the plurality of fan blades 3 . In this embodiment, the surrounding wall 21 can have an extension 211 , and the extension 211 can be integrally connected with the surrounding wall 21 . The extension 211 is composed of The ring wall 21 extends radially outward (that is, away from the rotating shaft 1), and the extension 211 can be made of plastic or metal, which is not limited in the present invention. For example, the extension 211 can be made of plastic Material, so as to cover the ring wall 21, thereby, under the premise of thinning the fan blades 3, a relatively large joint area can be formed with the ring wall 21 of the hub 2 by means of the extension part 211, It has the effect of improving the joint stability of the plurality of fan blades 3 and preventing them from breaking.

Please refer to FIG. 4, the plurality of fan blades 3 respectively have a top edge 3c and a bottom edge 3d opposite to each other, and the plurality of fan blades 3 may respectively have a proximal end 3a and a distal end 3b, The fan blade 3 is connected to the extension part 211 of the ring wall 22 by the proximal end 3a, and the present invention does not limit the scheme of each fan blade 3, for example, the distance between the top edge 3c and the bottom edge 3d It can gradually expand from the proximal end 3a to the distal end 3b, so that the plurality of fan blades 3 can generate a larger air volume, and the proximal end 3a, the distal end 3b and the plate body 22 can be located at different positions. In this embodiment, the highest point of the plate body 22 can be higher than the highest point of the distal end 3b, and the highest point of the distal end 3b can be higher than the highest point of the proximal end 3a, that is, When the plate body 22 of the fan wheel P of the present invention is facing the ceiling, the distance between the highest point of the plate body 22 and the ground is the farthest, the distance between the highest point of the far-axis end 3b and the ground is next, and the distance between the highest point of the far-axis end 3b and the ground is the second. The highest point is the closest to the ground.

In addition, the present invention does not limit the material of the plurality of fan blades 3, the plurality of fan blades 3 and the extension portion 211 can be made of the same material or different materials, and the plurality of fan blades 3 and the hub 2 can be buckled, In this embodiment, the plurality of fan blades 3 and the hub 2 can be integrally connected by injection molding to improve structural strength and production efficiency.

Please refer to Fig. 3 and Fig. 4, and there may be a first distance B1 between the proximal ends 3a of two adjacent fan blades 3, and there may be a first distance B1 between the distal ends 3b of two adjacent fan blades 3. The second distance B2, the ratio of the second distance B2 to the first distance B1 is preferably 1.2-3, so that there is enough distance for the airflow to pass through, which has the effect of smoothing the airflow. In addition, each fan blade 3 may have a far-axis height H2 at the far-axis end 3b, and the far-axis height H2 is preferably greater than or equal to 1/2 of the height H1 of the surrounding wall, so that the plurality of fan blades 3 can produce a higher Large air volume.

2 and 3, each fan blade 3 has a swept section 31 and a swept section 32, the swept section 31 of each fan blade 3 can be adjacent to the proximal end 3a, and each swept section 31 is connected In the hub 2, the forward-swept section 32 of each fan blade 3 can be adjacent to the distal end 3b, and each forward-swept section 32 can preferably be arc-shaped or cycloid-shaped; wherein, a cycloid (Cycloid) is defined as a When a circle rolls on a straight line, the trajectory formed by a certain point on the circumference is also called a cycloidal line or a circular rolling line. The extending direction of the forward-swept section 32 is the same as the rotation direction K of the fan wheel P, and the extending direction of the swept-back section 31 is opposite to the rotation direction K of the fan wheel P. Moreover, each fan blade 3 has an inflection point 33, which is connected between the forward-swept segment 32 and the rear-sweep segment 31, and the inflection point 33 to the rear-sweep segment 31 has a first maximum The straight line length D1, from the inflection point 33 to the forward-swept section 32 has a second maximum straight line length D2, and the ratio of the first maximum straight line length D1 to the second maximum straight line length D2 is 0.3˜0.8.

In addition, please refer to FIG. 3 , the swept back section 31 may have a first tangent line L1 passing through the proximal end 3a, the forward swept section 32 may have a second tangent line L2 passing through the proximal end 3a, There may be an included angle θ between the first tangent line L1 and the second tangent line L2, and the included angle θ may be greater than or equal to 15 degrees and less than or equal to 55 degrees, so that the fan wheel P can maintain a better The wind pressure and air volume have the effect of improving the wind driving efficiency; preferably, the included angle θ can be greater than or equal to 15 degrees and less than or equal to 35 degrees, which can maintain better wind pressure and air volume; in this embodiment , the included angle θ may be 30 degrees. It is particularly noted that each swept section 31 can be arc-shaped or linear, and the utility model is not limited. In this embodiment, each swept-back section 31 is described as an arc, while in other embodiments Among them, each swept back segment 31 can also be in a straight line as shown in FIG. 5 , that is, the swept back segment 31 can overlap with the first tangent line L1.

Please refer to Fig. 6, which is the second embodiment of the fan wheel P of the present invention, the second embodiment is substantially the same as the first embodiment, in the second embodiment, the fan wheel P of the present utility model can be additionally Including at least one connecting ring 4, the at least one connecting ring 4 can connect the forward swept sections 32 of the plurality of fan blades 3, the at least one connecting ring 4 can be adjacent to the distal end 3b of the plurality of fan blades 3, the connecting ring 4 can connect the top edge 3c or the bottom edge 3d of the plurality of fan blades 3, or can choose to connect any position between the top edge 3c and the bottom edge 3d. In this embodiment, the connecting ring 4 can Connecting the top edge 3c, the connecting ring 4 can stabilize the position of the plurality of fan blades 3, avoid shaking of each fan blade 3 under high-speed operation, and reduce the air resistance of each fan blade 3 during the rotation of the fan wheel P The impact produces vibration or deformation.

Please refer to Fig. 1 and Fig. 3, in a cooling fan having fan wheel P in any of the above-mentioned embodiments, the cooling fan has a fan frame 5, and the fan frame 5 has a base 51, and the base 51 has a A shaft tube 511 , the rotating shaft 1 is assembled to the shaft tube 511 , so that the fan wheel P is rotatably disposed on the shaft tube 511 , and a stator 6 is located on the outer periphery of the shaft tube 511 . Since the inflection point 33 has the first maximum straight-line length D1 to the back-swept section 31, the inflection point 33 to the forward-sweep section 32 has the second maximum straight-line length D2, and the first maximum straight-line length D1 and The ratio of the second maximum linear length D2 is 0.3-0.8; thus, when the fan wheel P rotates, the airflow flowing between two adjacent fan blades 3 can flow through the back-swept segment 31 and the forward-swept segment in sequence 32. It can reduce the turbulence of the airflow, increase the air volume and ensure that the airflow swirled by the plurality of fan blades 3 is relatively unimpeded, so that the plurality of fan blades 3 can generate effective The air flow is to maintain a predetermined air volume, which can save energy at the same time.

In summary, the fan wheel of the present invention and the cooling fan with the fan wheel have the first maximum linear length from the inflection point to the swept back section, and the first maximum straight line length from the inflection point to the forward swept section. Two maximum straight-line lengths, and the ratio of the first maximum straight-line length to the second maximum straight-line length is 0.3-0.8, which can ensure that the airflow swirled by the plurality of fan blades is relatively unimpeded, even if the motor rotates at a low speed, the A plurality of fan blades can also generate effective air flow to maintain a predetermined air volume, which can increase the air volume and save energy.

Although the utility model has been disclosed by the above-mentioned preferred embodiments, it is not intended to limit the utility model, and any person skilled in the art can make various changes relative to the above-mentioned embodiments without departing from the spirit and scope of the utility model The invention and modification still belong to the technical category protected by the utility model, so the protection scope of the utility model should include the literal meaning and all changes within the equivalent scope described in the claims. Moreover, when the above-mentioned multiple embodiments can be combined, the present invention includes embodiments of any combination.

Claims (15)

1. A fan wheel, comprising:

a rotating shaft;

a hub connected to the shaft; and

the fan blades are arranged around the hub, each fan blade is provided with a backward-swept section and a forward-swept section, each backward-swept section is connected with the hub, the extending direction of the forward-swept section is the same as the rotating direction of the fan wheel, the extending direction of the backward-swept section is opposite to the rotating direction of the fan wheel, each fan blade is provided with a reverse curve point which is connected between the forward-swept section and the backward-swept section, the reverse curve point and the backward-swept section have a first maximum straight line length, the reverse curve point and the forward-swept section have a second maximum straight line length, and the ratio of the first maximum straight line length to the second maximum straight line length is 0.3-0.8.

2. The fan wheel of claim 1 wherein each forward swept segment is arcuate.

3. The impeller of claim 1 wherein each forward swept segment is cycloidal.

4. A fan wheel according to claim 1 wherein each swept back section is arcuate or linear.

5. The impeller of claim 1 wherein each fan blade has a proximal end connected to the hub, the swept back section has a first tangent line passing through the proximal end, the swept forward section has a second tangent line passing through the proximal end, the first tangent line and the second tangent line have an included angle therebetween, the included angle being greater than or equal to 15 degrees and less than or equal to 55 degrees.

6. The fan wheel of claim 5 wherein the included angle is greater than or equal to 15 degrees and less than or equal to 35 degrees.

7. The impeller of claim 1 wherein each blade has a proximal and a distal axial end, the rearward segment of each blade being adjacent the proximal end and the forward segment of each blade being adjacent the distal end.

8. The impeller of claim 7 wherein the proximal ends of adjacent blades have a first spacing therebetween and the distal ends of adjacent blades have a second spacing therebetween, the ratio of the second spacing to the first spacing being 1.2 to 3.

9. The impeller of claim 1 wherein the hub has a ring wall connected to a periphery of the plate, the plurality of blades being coupled to the ring wall.

10. The impeller as claimed in claim 9, wherein the annular wall has an extension portion extending radially outwardly therefrom, the plurality of blades being connected to the extension portion.

11. The impeller of claim 9 wherein the annular wall has an annular wall height, each fan blade has a distal shaft end, each fan blade has a distal shaft height at the distal shaft end, and the distal shaft height is greater than or equal to 1/2 the annular wall height.

12. The impeller of claim 9 wherein each fan blade has a proximal end and a distal end, the plate, the proximal end and the distal end being at different levels.

13. The impeller of claim 12 wherein the highest point of the plate is higher than the highest point of the distal end, the highest point of the distal end being higher than the highest point of the proximal end.

14. The impeller of claim 1 further comprising a connecting ring connecting the forward swept segments of the plurality of blades.

15. A heat dissipating fan, comprising:

a fan frame having a base with a shaft tube;

a stator located at the outer circumference of the shaft tube; and

a fan wheel according to any one of claims 1 to 14 rotatably mounted on the shaft tube.

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