TWM635208U - Fan wheel and heat-dissipation fan having the fan wheel - Google Patents

Abstract

A fan wheel and a heat dissipation fan with the fan wheel are used to solve the problem that the conventional fan wheel has poor airflow smoothness and makes it difficult to increase the air volume. The system includes: a rotating shaft; a hub connected to the rotating shaft; and several fan blades arranged around the hub, each of the fan blades has a swept back section and a forward swept section, each of the swept back sections is connected to the hub, the The extension direction of the forward sweep section is the same as the rotation direction of the fan wheel, the extension direction of the back sweep section is opposite to the rotation direction of the fan wheel, and each of the fan blades has an inflection point connected to the forward sweep section and the back sweep section Between segments, the inflection point has a first maximum straight-line length to the back-swept segment, and the inflection point to the forward-sweep segment has a second maximum straight-line length, and the first maximum straight-line length and the second maximum straight-line length The ratio of length is 0.3~0.8.

Description

Fan wheel and cooling fan with the fan wheel

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

The known fan wheel can be connected to a hub by a rotating shaft, and the hub has a side wall, and several fan blades of the fan wheel are respectively connected to the outer wall of the side wall by one end, and each fan blade has a swept back section and a front Swept section, the swept section can be closer to the wheel hub than the forward swept section; thus, the heat dissipation fan with the conventional fan wheel can be assembled and positioned in systems such as laptops, air conditioners or ventilation equipment, so that by the digital A fan blade displaces the wind to generate airflow.

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

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

In order to solve the above problems, the purpose of this creation 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 purpose of this creation is to provide a fan wheel and a heat dissipation fan with the fan wheel, which can reduce vibration or deformation of the fan blades under the influence of air resistance.

Another purpose of this creation is to provide a fan wheel and a cooling fan with the fan wheel, which can make the airflow flow smoothly.

Another purpose of this creation is to provide a fan wheel and a cooling fan with the fan wheel, which can reduce the manufacturing cost.

The directionality mentioned throughout this work or similar terms, such as "front", "back", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "side", etc., are mainly referring to the directions of the attached drawings. Each direction or its approximate terms are only used to assist in explaining and understanding the various embodiments of this creation, not to limit this creation.

The use of the quantifiers "one" or "one" in the elements and components described throughout this creation is only for convenience and to provide the usual meaning of the scope of this creation; it should be interpreted in this creation as including one or at least one, and a single The notion of also includes the plural unless it is obvious that it means otherwise.

Approximate terms such as "combination", "combination" or "assembly" mentioned in the full text of this work mainly include the types that can be separated without destroying the components after connection, or the components can not be separated after connection, etc., which are common knowledge in this field One can be selected according to the material of the components to be connected or assembly requirements.

The fan wheel of this creation includes: a rotating shaft; a hub, connected to the rotating shaft; and several fan blades, arranged around the hub, each of which has a back-swept section and a forward-swept section, and each of the back-swept sections connected to 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 back sweep section is opposite to the rotation direction of the fan wheel, and each of the fan blades has an inflection point connected to the forward sweep Between the section and the swept section, the inflection point has a first maximum linear length to the swept section, the inflection point to the forward-swept section has a second maximum linear length, and the first maximum linear length and The ratio of the second maximum straight line length is 0.3-0.8.

The heat dissipation fan of this creation includes: a fan frame with a base, the base has A shaft tube; a stator located on the outer periphery of the shaft tube; and the fan wheel as mentioned above, the fan wheel is rotatably arranged on the shaft tube.

Accordingly, the fan wheel and the cooling fan with the fan wheel of the present invention 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 0.3~0.8, which can ensure that the airflow swirled by the several fan blades is relatively unimpeded, even if the motor is at a low speed, the several Fan blades can also generate effective air flow to maintain a predetermined air volume, which can increase air volume and save energy.

Wherein, each of the forward-swept segments may be arc-shaped. In this way, it has the effect of making the several fan blades maintain a predetermined air volume.

Wherein, each of the forward-swept segments may be in the shape of a cycloid. In this way, it has the effect of making the several fan blades maintain a predetermined air volume.

Wherein, each of the swept sections can 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 of the fan blades 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, the There may be an included angle between the first 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 of the fan blades may have a proximal end and a distal shaft end, the swept-back section of each fan blade may be adjacent to the proximal end, and the forward-swept section of each fan 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, the system can have enough space for the airflow to pass through, and the system has the effect of making the airflow flow smoothly.

Wherein, the hub may have a ring wall connected to the 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 through the extension portion, which has the effect of enabling the plurality of fan blades to be firmly combined with the hub.

Wherein, the surrounding wall may have a height of the surrounding wall, each of the fan blades may have a distal end, each of the fan blades 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 of. In this way, it has the effect of enabling the several 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, the system 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, the system has the effect of providing a larger air guide volume.

The fan wheel of the present invention may further 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 system can stabilize the positions of the several fan blades, prevent the fan blades from shaking under high-speed operation, and has the effect of reducing the vibration or deformation of the fan blades affected by the air resistance.

[this creation]

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

[Fig. 1] An exploded perspective view of a preferred embodiment of the cooling fan of this creation.

[Fig. 2] The plan view of the first embodiment of the fan wheel of this creation.

[Fig. 3] An enlarged view of the local structure as shown in Fig. 2.

[Fig. 4] A sectional view taken along line A-A in Fig. 3.

[Fig. 5] The partially enlarged plan view of the rectilinear section of the fan wheel in this creation.

[the 6th figure] the perspective view of the second embodiment of the fan wheel of this creation.

In order to make the above and other purposes, features and advantages of this creation more obvious and easy to understand, the preferred embodiments of this creation are specially cited below, and explained in detail 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 shown in Fig. 2, which is the first embodiment of the fan wheel P of this invention, which includes a rotating shaft 1, a hub 2 and several fan blades 3, the hub 2 is connected to the rotating shaft 1, and the plurality of fans The leaves 3 are arranged around the hub 2 .

Please refer to Figures 1 and 2, the rotating shaft 1 can have an axis C, and the rotating shaft 1 is based on the premise that it can smoothly drive the entire fan wheel P to rotate. The structure and appearance of the rotating shaft 1 are not included in this creation be restricted.

Please refer to Figures 2 and 4, the central part of the hub 2 can be combined with the rotating shaft 1, and the 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 may have a ring Wall 21 and a board body 22, the rotating shaft 1 is connected to the board body 22, the ring wall 21 is connected to the periphery of the board body 22, the ring wall 21 can have a ring wall height H1, and the ring wall 21 can be used to combine the Several fan blades 3, in this embodiment, the ring wall 21 can have an extension 211, the extension 211 can be integrally connected with the ring wall 21, the extension 211 is from the ring wall 21 radially toward Outward (that is, the direction away from the rotating shaft 1) is formed to extend, the extension 211 can be made of plastic material or metal material, and the present invention is not limited, for example: the extension 211 can be made of plastic material to cover the ring Wall 21, thereby, under the premise of thinning the several fan blades 3, a relatively large combined area can be formed by the extension part 211 and the ring wall 21 of the hub 2, which has the function of lifting the several fan blades 3 Combined with stability, not easy to break.

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 211 of the ring wall 21 by the proximal end 3a, the invention does not limit the shape of each fan blade 3, for example, between the top edge 3c and the bottom edge 3d The distance between the near-axis end 3a and the far-axis end 3b can gradually expand, so that the several fan blades 3 can generate a larger air volume, and the near-axis end 3a, the far-axis end 3b and the plate body 22 can Located at different levels, in this embodiment, the highest point of the plate body 22 may be higher than the highest point of the distal end 3b, and the highest point of the distal end 3b may be higher than the highest point of the proximal end 3a, That is, when the plate body 22 of the fan wheel P of this 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 proximal end 3a and the ground is the second. The highest point is closest to the ground.

In addition, the invention does not limit the material of the several fan blades 3, the several fan blades 3 and the extension part 211 can be made of the same material or different materials, and the several fan blades 3 and the hub 2 can be buckled, attached 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 the 3rd and 4th figures, again, between the near-axis ends 3a of two adjacent fan blades 3, With a first distance B1, there may be a second distance B2 between the distal ends 3b of two adjacent fan blades 3, and the ratio of the second distance B2 to the first distance B1 is preferably 1.2~3, so , the system can have sufficient spacing for the airflow to pass through, and the system has the effect of making the airflow flow smoothly. In addition, each of the fan blades 3 may have a far-axis height H2 at the distal end 3b, and the distal height H2 is preferably greater than or equal to 1/2 of the ring wall height H1, so that the plurality of fan blades 3 can produce Larger air volume.

Please refer to Figures 2 and 3, each of the blades 3 has a swept section 31 and a swept section 32, the swept section 31 of each blade 3 can be adjacent to the proximal end 3a, each of the swept Section 31 is connected to the hub 2, and the forward-swept section 32 of each fan blade 3 can be adjacent to the distal end 3b, and each of the forward-swept sections 32 can preferably be arc-shaped or cycloid-shaped; wherein, the cycloid (Cycloid) is It is defined as the trajectory formed by a certain point on the circumference of a circle when it rolls on a straight line, also known as the cycloid or 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 of the fan blades 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 The maximum linear length D1, the inflection point 33 to the forward-swept section 32 has a second maximum linear length D2, and the ratio of the first maximum linear length D1 to the second maximum linear 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, and 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 when the fan wheel P rotates, it can maintain a better The wind pressure and air volume have the effect of improving the wind-dispelling 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 of the swept sections 31 can be arc-shaped or linear, and the invention is not limited. In this embodiment, each of the swept-back sections 31 is described as an arc, while in other embodiments Among them, each of the swept back sections 31 can also be linear as shown in Fig. 5, That is, the swept-back segment 31 may overlap with the first tangent line L1.

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

Please refer to Figs. 1 and 3, in a cooling fan with fan wheels 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 to the swept section 31 has the first maximum linear length D1, the inflection point 33 to the forward-swept section 32 has the second maximum linear length D2, and the first maximum linear 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 section 31 and the forward-swept section in sequence 32. It can reduce the turbulence of the airflow, increase the air volume and ensure that the airflow of the several fan blades 3 is not hindered, so that even if the motor is at a low speed, the several fan blades 3 can be affected. Generating effective air flow to maintain a predetermined air volume can also save energy.

To sum up, the fan wheel of the invention and the cooling fan with the fan wheel have the first maximum linear length from the inflection point to the swept section, and the second maximum straight line length from the inflection point to the forward-swept section. The maximum linear length, and the ratio of the first maximum linear length to the second maximum linear length is 0.3~0.8, it can ensure that the airflow produced by the several fan blades is not hindered. Even if the motor is at a low speed, the several fan blades can also generate effective air flow to maintain the predetermined air volume. It can have Improve air volume and save energy.

Although this creation has been disclosed by using the above-mentioned preferred embodiments, it is not intended to limit this creation. Anyone who is familiar with this technology can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of this creation. Therefore, the scope of protection of this creation shall include all changes within the meaning and equivalent scope recorded in the appended scope of patent application. In addition, when the above-mentioned several embodiments can be combined, the invention includes any combination of implementations.

2: hub

21: ring wall

211: Extension

22: board body

3: fan blade

3a: proximal end

3b: distal end

31: Swept back section

32: Swept forward

33: Inflection point

B1: first spacing

B2: second spacing

D1: The first maximum straight line length

D2: The second largest straight line length

L1: first tangent

L2: second tangent

K: direction of rotation

P: fan wheel

θ: included angle

Claims (15)

A fan wheel, comprising: a rotating shaft; a hub connected to the rotating shaft; and several fan blades arranged around the hub, each of the fan blades has a back-swept section and a forward-swept section, and each of the back-swept sections is connected to the 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 back sweep section is opposite to the rotation direction of the fan wheel, and each of the fan blades has an inflection point connected to the forward sweep section and 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 0.3~0.8. The fan wheel according to claim 1, wherein each of the forward-swept segments is arc-shaped. The fan wheel according to claim 1, wherein each of the forward-swept segments is cycloidal. The fan wheel according to claim 1, wherein each of the swept sections is arc-shaped or straight-line. The fan wheel according to claim 1, wherein each of the fan blades has an proximal end connected to the hub, the swept-back section has a first tangent line passing through the proximal end, and the forward-swept section has a first tangent passing through the proximal end. For the second tangent, there is an included angle between the first tangent and the second tangent, and the included angle is greater than or equal to 15 degrees and less than or equal to 55 degrees. The fan wheel according to claim 5, wherein the included angle is greater than or equal to 15 degrees and less than or equal to 35 degrees. The fan wheel according to claim 1, wherein each of the fan blades has an proximal end and a distal end, the swept section of each blade is adjacent to the proximal end, and the forward section of each blade is adjacent to the far end. shaft end. The fan wheel according to claim 7, wherein there is 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 second distance is the same as the The ratio of the first spacing is 1.2˜3. The fan wheel according to claim 1, wherein the hub has a ring wall connected to a peripheral edge of a plate body, and the plurality of fan blades are combined with the ring wall. The fan wheel according to claim 9, wherein the ring wall has an extension portion extending radially outward from the ring wall, and the plurality of fan blades are connected to the extension portion. The fan wheel according to claim 9, wherein the surrounding wall has a height of the surrounding wall, each of the fan blades has a distal end, each of the fan blades has a distal height at the distal end, and the distal height is greater than or equal to 1/2 of the height of the ring wall. The fan wheel according to claim 9, wherein each of the fan blades has a proximal end and a distal end, and the plate body, the proximal end, and the distal end are located at different levels. The fan wheel according to claim 12, wherein the highest point of the plate body is higher than the highest point of the distal end, and the highest point of the distal end is higher than the highest point of the proximal end. The fan wheel according to claim 1 further includes a connecting ring, and the connecting ring connects the forward-swept sections of the plurality of fan blades. A cooling fan, comprising: a fan frame with a base, the base has a shaft tube; a stator, located on the outer periphery of the shaft tube; and a fan wheel according to any one of claims 1 to 14, the fan The wheel is rotatably arranged on the axle tube.

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