CN217682366U - Fan wheel and cooling fan with same - Google Patents
Fan wheel and cooling fan with same Download PDFInfo
- Publication number
- CN217682366U CN217682366U CN202221349006.6U CN202221349006U CN217682366U CN 217682366 U CN217682366 U CN 217682366U CN 202221349006 U CN202221349006 U CN 202221349006U CN 217682366 U CN217682366 U CN 217682366U
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- fan
- swept
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- impeller
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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
Technical Field
The present invention relates to a fan, and more particularly to a fan wheel and a heat dissipation fan having the same.
Background
The existing fan wheel can be connected with a hub by a rotating shaft, the hub is provided with a side wall, a plurality of fan blades of the fan wheel are respectively connected with the outer wall of the side wall by one end, each fan blade is provided with a sweepback section and a sweepforward section, and the sweepback section can be adjacent to the hub compared with the sweepforward section; thus, the heat dissipation fan with the conventional fan wheel can be assembled and positioned in a system such as a pen power system, an air conditioner or a ventilation device, and the like, so as to generate air flow by means of the plurality of fan blades.
Although the existing fan wheel can be used for driving air flow; however, since the size ratio of the swept-back section to the swept-forward section is not particularly optimized, the airflow between the fan blades is relatively turbulent, which causes poor smoothness of the airflow entering and exiting the fan, and thus the airflow of the conventional fan wheel is difficult to effectively increase.
In view of the above, there is still a need for improvement of the existing fan wheel.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide a fan wheel and a heat dissipation fan having the same, which can increase the air volume and save energy.
The present invention provides a fan wheel and a heat dissipation fan having the same, which can reduce the influence of air resistance on the fan blades to cause vibration or deformation.
Another object of the present invention is to provide a fan wheel and a heat dissipation fan having the same, which can make the air flow smooth.
Another objective of the present invention is to provide a fan wheel and a heat dissipation fan having the same, which can reduce the manufacturing cost.
In the present invention, the directions or the similar terms thereof, such as "front", "back", "left", "right", "top", "bottom", "inner", "outer", "side", etc., refer to the directions of the drawings, and the directions or the similar terms thereof are only used to assist the explanation and understanding of the embodiments of the present invention, but not to limit the present invention.
The components and members described throughout the present invention use the term "a" or "an" only for convenience and to provide a general meaning of the scope of the present invention; in the present invention, the term "comprising" should be interpreted as including one or at least one, and the singular includes the plural unless it is obvious that it means otherwise.
The terms "combined", "combined" or "assembled" used in the present invention include the separation of the components without damaging the components after the connection, or the inseparable components after the connection, and the selection can be made by the person having ordinary knowledge in the art according to the material of the components to be connected or the assembly requirement.
The utility model discloses a fan wheel, include: 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.
The utility model discloses a cooling fan, include: a fan frame having a base with a shaft tube; a stator located at the periphery of the shaft tube; and the fan wheel is rotatably arranged on the shaft tube.
Therefore, the utility model discloses a fan wheel and have radiator fan of this fan wheel utilizes this inflection point to have this first maximum straight line length to this sweepback section, should inflection point to this sweepback section have this second maximum straight line length, and the ratio of this first maximum straight line length and this second maximum straight line length is 0.3 ~ 0.8, can ensure that the air current that these a plurality of flabellums revolve out is less hindered, even the motor is at low-speed, these a plurality of flabellums also can produce effective air current and flow, in order to maintain predetermined amount of wind, can have the efficiency that promotes amount of wind and energy saving.
Wherein each forward-swept segment may be arcuate. Therefore, the fan blades can maintain the preset air volume.
Wherein, each forward-swept segment can be in a cycloid shape. Therefore, the fan blades can maintain the preset air volume.
Wherein, each sweepback section can be in an arc shape or a straight shape. Therefore, the structure is simple and convenient to manufacture, and the effect of reducing the manufacturing cost is achieved.
Each fan blade can be provided with a near shaft end connected with the hub, the sweepback section can be provided with a first tangent line passing through the near shaft end, the sweepback section can be provided with a second tangent line passing through the near shaft end, and an included angle can be formed between the first tangent line and the second tangent line and can be larger than or equal to 15 degrees and smaller than or equal to 55 degrees. Therefore, the fan wheel can maintain better wind pressure and wind quantity when rotating, and has the effect of improving the wind driving efficiency.
Wherein the included angle may be greater than or equal to 15 degrees and less than or equal to 35 degrees. Therefore, the fan wheel can maintain better wind pressure and wind quantity when rotating, and has the effect of improving the wind driving efficiency.
Wherein each fan blade may have a proximal end and a distal end, the swept back section of each fan blade may be adjacent the proximal end, and the swept forward section of each fan blade may be adjacent the distal end. Therefore, the airflow can easily flow out from the far shaft end of the fan blade, and the airflow flowing is smooth.
The first distance can be arranged between the near shaft ends of the two adjacent fan blades, the second distance can be arranged between the far shaft ends of the two adjacent fan blades, and the ratio of the second distance to the first distance can be 1.2-3. Therefore, the air flow can pass through the air flow channel with enough space, and the air flow channel has the effect of smooth air flow.
The hub may have a ring wall connected to the periphery of a plate, and the blades may be combined to the ring wall. Therefore, the structure is simple and convenient to manufacture, and the effect of reducing the manufacturing cost is achieved.
The annular wall may have an extension portion extending radially outward from the annular wall, and the plurality of fan blades are connected to the extension portion. Therefore, the fan blades can form a relatively large combination area with the annular wall of the hub by means of the extension part, and the fan blades can be firmly combined with the hub.
The annular wall may have an annular wall height, each fan blade may have a distal shaft end, and each fan blade may have a distal shaft height at the distal shaft end, which may be greater than or equal to 1/2 of the annular wall height. Therefore, the fan blades can generate large air volume.
Each fan blade can be provided with a near shaft end and a far shaft end, and the plate body, the near shaft end and the far shaft end can be located at different horizontal heights. Thus, the structure is simple and the assembly is convenient.
The highest point of the plate body can be higher than that of the far shaft end, and the highest point of the far shaft end can be higher than that of the near shaft end. Therefore, the air guide device has the effect of providing larger air guide quantity.
The fan wheel of the present invention may further comprise a connection ring, which connects the forward swept sections of the plurality of fan blades. Therefore, the connecting ring can stabilize the positions of the fan blades, prevent the fan blades from shaking in high-speed operation, and has the effect of reducing the vibration or deformation of the fan blades due to the influence of air resistance.
Drawings
FIG. 1: the utility model is an exploded perspective view of a preferred embodiment of the heat dissipation fan;
FIG. 2: a plan view of a first embodiment of the impeller of the present invention;
FIG. 3: an enlarged view of a portion of the structure shown in FIG. 2;
FIG. 4 is a schematic view of: base:Sub>A cross-sectional view taken along line A-A of FIG. 3;
FIG. 5: the sweepback section of the fan wheel of the utility model is a linear local enlarged plan view;
FIG. 6: the utility model discloses a perspective view of fan wheel second embodiment.
Description of the reference numerals
[ utility model ] to solve the problems
1: rotating shaft
2: hub
21 annular wall
211 an extension part
22: plate body
3: fan blade
3a near shaft end
3b distal shaft end
3c top edge
3d bottom edge
31 swept back section
32 forward swept section
33 point of inflection
4: connecting ring
5, fan frame
51 base
511 axle tube
6: stator
B1 first pitch
B2 second pitch
C, axis center
D1 first maximum straight length
D2 second maximum straight line length
H1 is the height of the ring wall
H2 distance from the axle
L1 first tangent line
L2 is the second tangent line
K is the direction of rotation
P is a fan wheel
And theta is the included angle.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below; in addition, the same reference numerals are used in different drawings to designate the same elements, and the description thereof will be omitted.
Please refer to fig. 2, which shows a first embodiment of a fan wheel P of the present invention, including a rotating shaft 1, a hub 2 and a plurality of blades 3, wherein the hub 2 is connected to the rotating shaft 1, and the plurality of blades 3 are disposed around the hub 2.
Referring to fig. 1 and 2, the rotating shaft 1 may have an axis C, the rotating shaft 1 is a prerequisite for smoothly driving the integral fan wheel P to rotate, and the structure and the shape of the rotating shaft 1 are not limited in the present invention.
Referring to fig. 2 and 4, the central portion 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 of connecting the hub 2 and the rotating shaft 1. For example, the hub 2 may be coupled to the shaft 1 by injection coating, or coupled to the shaft 1 by tight fitting or laser welding, in this embodiment, the hub 2 may be made of metal and coupled to the shaft 1 by laser welding, so that the hub 2 and the shaft 1 can be firmly coupled. This wheel hub 2 can have a rampart 21 and a plate body 22, this plate body 22 is connected to this pivot 1, this rampart 21 is connected in the periphery of this plate body 22, this rampart 21 can have a rampart height H1, this rampart 21 can be used for combining these a plurality of flabellums 3, in this embodiment, this rampart 21 can have an extension 211, this extension 211 can be connected with this rampart 21 integrated into one piece, this extension 211 is radially outwards (i.e., keep away from the direction of this pivot 1) by this rampart 21 and extends the formation, this extension 211 can be plastic material or metal material, the utility model discloses all do not restrict, for example: the extending portion 211 can be made of plastic material to cover the annular wall 21, so that a relatively large combination area can be formed by the extending portion 211 and the annular wall 21 of the hub 2 on the premise of thinning the fan blades 3, and the fan blades 3 have the effects of improving the combination stability and preventing breakage.
Referring to fig. 4, the fan blades 3 respectively have a top edge 3c and a bottom edge 3d opposite to each other, and the fan blades 3 can respectively have a near shaft end 3a and a far shaft end 3b, the fan blades 3 are connected to the extension portion 211 of the ring wall 22 through the near shaft end 3a, 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 can be gradually enlarged from the near shaft end 3a toward the far shaft end 3b, so that the fan blades 3 can generate a larger air volume, and the near shaft end 3a, the far shaft end 3b and the plate body 22 can be located at different levels, in this embodiment, the highest point of the plate body 22 can be higher than the highest point of the far shaft end 3b, and the highest point of the far shaft end 3b can be higher than the highest point of the near shaft end 3a, that is, when the plate body 22 of the fan wheel P faces the ceiling, the distance between the highest point of the shaft end of the plate body 22 and the ground, the highest point of the near shaft end 3b and the ground are the closest to the ground.
Furthermore, the utility model discloses do not restrict the material of these a plurality of flabellums 3, these a plurality of flabellums 3 can be the same material or different materials with this extension 211, and these a plurality of flabellums 3 can buckle, paste and connect, gomphosis or integrated into one piece be connected etc. with this wheel hub 2, in this embodiment, these a plurality of flabellums 3 can be linked to each other by injection molding method is integrative with this wheel hub 2 to promote structural strength and production efficiency.
Referring to fig. 3 and 4, a first distance B1 may be provided between the proximal ends 3a of the two adjacent blades 3, a second distance B2 may be provided between the distal ends 3B of the two adjacent blades 3, and a ratio of the second distance B2 to the first distance B1 is preferably 1.2-3, so that a sufficient distance is provided for the air flow to pass through, and the air flow can smoothly flow. In addition, each fan blade 3 can 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 ring wall height H1, so that the fan blades 3 can generate a larger air volume.
Referring to fig. 2 and 3, each fan blade 3 has a backward-swept section 31 and a forward-swept section 32, the backward-swept section 31 of each fan blade 3 can be adjacent to the proximal end 3a, each backward-swept section 31 is connected to 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 be preferably in an arc shape or a cycloid shape; cycloids (cycloids) are defined as the locus of a point on a circle when the circle rolls on a straight line, which is also called a spinning wheel or a circular rolling line. The forward swept segment 32 extends in the same direction as the direction of rotation K of the fan wheel P and the backward swept segment 31 extends in the opposite direction to the direction of rotation K of the fan wheel P. Each fan blade 3 has a reverse curvature point 33, the reverse curvature point 33 is connected between the forward swept section 32 and the backward swept section 31, the length from the reverse curvature point 33 to the backward swept section 31 has a first maximum straight length D1, the length from the reverse curvature point 33 to the forward swept section 32 has a second maximum straight length D2, and the ratio of the first maximum straight length D1 to the second maximum straight length D2 is 0.3-0.8.
In addition, referring to fig. 3, the backward swept segment 31 may have a first tangent L1 passing through the proximal end 3a, the forward swept segment 32 may have a second tangent L2 passing through the proximal end 3a, and an included angle θ may be formed between the first tangent L1 and the second tangent L2, where 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 may maintain a better wind pressure and wind volume when rotating, and has an 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, so as to maintain better wind pressure and wind volume; in the present embodiment, the included angle θ may be 30 degrees. It is specifically noted that each swept-back section 31 may be in an arc shape or a straight shape, the present invention is not limited thereto, in the present embodiment, each swept-back section 31 is illustrated in an arc shape, and in other embodiments, each swept-back section 31 may also be in a straight shape as shown in fig. 5, that is, the swept-back section 31 may overlap with the first tangent L1.
Please refer to fig. 6, which shows a 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 invention may further include at least one connection ring 4, the at least one connection ring 4 may connect the forward swept section 32 of the plurality of fan blades 3, the at least one connection ring 4 may be adjacent to the far axial end 3b of the plurality of fan blades 3, the connection ring 4 may connect the top edge 3c or the bottom edge 3d of the plurality of fan blades 3, or may selectively connect any position between the top edge 3c and the bottom edge 3d, in this embodiment, the connection ring 4 may connect the top edge 3c, the connection ring 4 may stabilize the position of the plurality of fan blades 3, prevent the fan blades 3 from shaking during high speed operation, and reduce the vibration or deformation of the fan blades 3 during rotation of the fan wheel P due to the influence of air resistance.
Referring to fig. 1 and 3, in a heat dissipating fan having the fan wheel P of any of the above embodiments, the heat dissipating fan has a fan frame 5, the fan frame 5 has a base 51, the base 51 has a shaft tube 511, the rotating shaft 1 is assembled to the shaft tube 511, such that the fan wheel P is rotatably disposed on the shaft tube 511, and a stator 6 is disposed on an outer circumference of the shaft tube 511. Since the recurved point 33 to the swept back section 31 have the first maximum straight length D1, the recurved point 33 to the swept front section 32 have the second maximum straight length D2, and the ratio of the first maximum straight length D1 to the second maximum straight length D2 is 0.3-0.8; thus, when the fan wheel P rotates, the airflow flowing between two adjacent blades 3 can sequentially flow through the backward swept section 31 and the forward swept section 32, so as to reduce the turbulence of the airflow, increase the air volume, and ensure that the airflow that the blades 3 are rotated out is not obstructed, thereby, even if the motor is at a low rotation speed, the blades 3 can generate effective airflow to maintain a predetermined air volume, and the energy saving effect can be achieved.
To sum up, the utility model discloses a fan wheel and have radiator fan of this fan wheel utilizes this inflection point to have this first biggest straight-line length to this sweepback section, and this inflection point has this second biggest straight-line length to this sweepback section, and the ratio of this first biggest straight-line length and this second biggest straight-line length is 0.3 ~ 0.8, can ensure that the air current that these a plurality of flabellums revolve out is less obstructed, even the motor is at low rotational speed, these a plurality of flabellums also can produce effective air current and flow to maintain predetermined amount of wind, can have the efficiency that promotes the amount of wind and the energy can be saved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention. When the above-described embodiments can be combined, the present invention includes embodiments that can be combined arbitrarily.
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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111205467U TWM635208U (en) | 2022-05-25 | 2022-05-25 | Fan wheel and heat-dissipation fan having the fan wheel |
| TW111205467 | 2022-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217682366U true CN217682366U (en) | 2022-10-28 |
Family
ID=83705213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221349006.6U Active CN217682366U (en) | 2022-05-25 | 2022-05-31 | Fan wheel and cooling fan with same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN217682366U (en) |
| TW (1) | TWM635208U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117514902A (en) * | 2023-10-20 | 2024-02-06 | 华为技术有限公司 | Impeller, centrifugal fan and electronic device |
-
2022
- 2022-05-25 TW TW111205467U patent/TWM635208U/en unknown
- 2022-05-31 CN CN202221349006.6U patent/CN217682366U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117514902A (en) * | 2023-10-20 | 2024-02-06 | 华为技术有限公司 | Impeller, centrifugal fan and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM635208U (en) | 2022-12-11 |
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