Double-wing type powerful suction vortex fan blades, fans and electronic equipment

Abstract

a double-bladed powerful suction vortex fan blade, a fan, and an electronic device; the double-bladed powerful suction vortex fan blade includes a base, and a plurality of centrifugal blades and a plurality of axial blades respectively connected to the base, the centrifugal blades and the axial blades are respectively circumferentially arranged on the outer periphery of the base, and the axial blades are arranged on the intake side of the centrifugal blades, there is a gap between each two adjacent centrifugal blades, the number of the centrifugal blades is 2N times the number of the axial blades, and the number of the gaps is also 2N times the number of the axial blades, each axial blade extends obliquely to the axial direction and gradually approaches the two adjacent gaps opposite each other, so that each axial blade can guide the outside air into the corresponding two gaps in an orderly manner, which solves the technical problem of traditional centrifugal fans having a relatively weak ability to overcome impedance, resulting in a relatively small air volume.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims priority to a Chinese patent application, bearing application number 202311065594.X, filed with the China Patent Office on August 23, 2023, for the invention "Double-blade powerful suction vortex fan blade, fan and electronic device," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the technical field of fans, and more particularly to a double-bladed powerful suction vortex fan blade, a fan, and an electronic device. [Background technology]

[0003] Conventional fans are often axial fans or centrifugal fans. An axial fan can be understood as a fan in which air enters from the axial direction of the fan and blows out along the axial direction, such as a household ceiling fan or a small fan used on a desk. A centrifugal fan is also called a radial fan. A centrifugal fan can be understood as a fan in which air enters from the axial direction of the fan and blows out along the radial direction of the fan. Currently, with the trend toward improved performance, thinner and lighter weight of laptops and higher heat dissipation performance, centrifugal fans are often used as fans inside laptops to quickly dissipate heat inside the laptop.

[0004] Specifically, a general centrifugal fan has a reflux phenomenon. This reflux can be understood as the wind pushed radially by the centrifugal blades not being able to completely discharge outward, and when this wind is sent out radially, a small part of it overflows in the opposite direction to the axial intake direction and collides with the wind that has just entered in the axial direction, thereby forming a vortex within the fan, which creates a certain impedance when the centrifugal blades rotate and has a certain effect on the air volume.

[0005] More specifically, there are currently combined fans that combine axial blades and centrifugal blades, where the axial blades guide the airflow to the centrifugal blades and effectively prevent the airflow pushed by the centrifugal blades from overflowing in the axial direction, thereby reducing the occurrence of reflux, effectively improving the fan's ability to overcome impedance, and further increasing the fan's airflow volume. However, conventional technologies simply combine axial blades and centrifugal blades, which results in limited reduction in reflux, i.e., the centrifugal blades' ability to overcome impedance when rotating is still relatively weak, causing the fan to lose relatively more energy but still unable to increase airflow. As laptops become more powerful and have higher heat dissipation requirements, they need to be matched with fans that have stronger impedance overcoming capabilities and larger airflow volumes. How to significantly reduce reflux, improve impedance overcoming capabilities, and significantly increase the fan's airflow volume has been a technical challenge that has never been resolved in the field of fans. Summary of the Invention [Problem to be solved by the invention]

[0006] The objective of the present invention is to provide a double-bladed powerful suction vortex fan blade, a fan, and an electronic device that solve the technical problem that the traditional centrifugal fan has a relatively weak ability to overcome impedance, which causes a relatively small air volume. [Means for solving the problem]

[0007] To achieve this goal, the present invention adopts the following technical solutions.

[0008] The double-bladed powerful suction vortex fan blade includes a base, a plurality of centrifugal blades and a plurality of axial blades respectively connected to the base, The centrifugal blades and the axial blades are respectively arranged circumferentially around the outer periphery of the base, and the axial blades are arranged on the intake side of the centrifugal blades, with a gap between each adjacent pair of centrifugal blades. The number of centrifugal blades is 2N times the number of axial blades, so that the number of gaps is also 2N times the number of axial blades. Each axial blade extends obliquely to the axial direction and gradually approaches the two adjacent gaps opposite to it, so that each axial blade can guide the outside air into the corresponding two gaps in an orderly manner, where N is a positive integer.

[0009] In one of the technical solutions, the surface of the axial blade facing the centrifugal blade is a first airflow surface, and the surface of the axial blade facing away from the centrifugal blade is a second airflow surface, and the first airflow surface and the second airflow surface of each axial blade both gradually approach the gap at an angle, and the axial projections of the first airflow surface and the second airflow surface of each axial blade are both within the same two adjacent gaps, so that the first airflow surface of that axial blade and the second airflow surface of another adjacent axial blade can both guide the outside air into the corresponding two gaps.

[0010] In one of the technical solutions, the first airflow guiding surface and the second airflow guiding surface are both curved structures recessed toward the centrifugal blade.

[0011] In one of the technical solutions, the centrifugal blade includes a guide portion and a blowing portion; the guide portion and the blower portion are connected in order along a direction gradually moving away from the base, the guide portion protrudes along a rotation direction of the centrifugal blade, and the blower portion protrudes along a direction opposite to the rotation direction of the centrifugal blade, The ends of the first air guide surface and the second air guide surface that are farther from the base both extend to positions adjacent to the connecting point between the guide section and the air blower section.

[0012] In one of the technical solutions, the surface of the guide portion facing the axial blade is a first side surface, the first air guide surface extends obliquely to a position adjacent to the first side surface of the first centrifugal blade, and an end of the first air guide surface away from the base extends to a position adjacent to a connecting point between the guide portion and the air blowing portion of the second centrifugal blade; Here, the first centrifugal blade and the second centrifugal blade are two adjacent centrifugal blades arranged in sequence along the rotation direction of the fan blade.

[0013] In one of the technical proposals, the first side has a curved structure that is concave along the axial direction, so that the inner rings of all the blowing sections form a circumferential storage space, and the axial flow blades are accommodated within the storage space.

[0014] In one of the technical solutions, the double-bladed strong suction vortex fan blade further includes an outer ring, which is connected to the blowing sections of all the centrifugal blades.

[0015] The present application further provides a fan, which adopts the double-bladed strong suction vortex fan blade described in any one of the above technical solutions.

[0016] The present application further provides an electronic device, which includes the fan of the above technical solution. [Effects of the Invention]

[0017] Compared with the prior art, the double-bladed strong suction vortex fan blade of the present invention has at least the following beneficial effects:

[0018] This solution also uses a combined structure of centrifugal blades and axial blades, and the axial blades not only improve the axial air intake capacity, but also prevent the air pushed by the centrifugal blades from overflowing in the opposite direction to the intake direction. In this solution, the number of axial blades is specifically designed to be half the number of centrifugal blades, and each axial blade is designed to gradually approach each other in two adjacent gaps at an angle, so that each axial blade can orderly guide the outside air into the corresponding two gaps, thereby greatly improving the axial air intake capacity and greatly preventing the air pushed by the centrifugal blades from overflowing in the opposite direction, greatly reducing the occurrence of reflux, further improving the ability to overcome impedance, and greatly increasing the air volume of the fan. The improvement in air volume is particularly noticeable when a relatively large number of centrifugal blades is required (for example, when the fan blades are used in the interior space of a laptop). [Brief explanation of the drawings]

[0019] In order to more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a structural schematic diagram of a double-bladed strong suction vortex fan blade according to an embodiment of the present application; FIG. [Figure 2] 1 is a front view of a double-bladed, strong suction vortex fan blade according to an embodiment of the present application; FIG. [Figure 3] FIG. 3 is an enlarged view of a portion A in FIG. [Figure 4] FIG. 2 is a rear view of a double-bladed, strong suction vortex fan blade according to an embodiment of the present application. [Figure 5] FIG. 5 is an enlarged view of a portion B in FIG. [Figure 6]1 is a structural schematic diagram of a double-bladed strong suction vortex fan blade according to an embodiment of the present application at another angle; FIG. [Figure 7] FIG. 7 is an enlarged view of a portion C in FIG. [Figure 8] This is a schematic diagram of the air volume values ​​at each position of the flow field distribution of a typical fan blade at a rotation speed of 5400 rpm. [Figure 9] This is a schematic diagram of the static pressure at each position of the flow field distribution of a typical fan blade at a rotation speed of 5400 rpm. [Figure 10] FIG. 1 is a schematic diagram of the air volume values ​​at each position of the flow field distribution of the double-bladed powerful suction vortex fan blade of this embodiment at a rotation speed of 5400 rpm. [Figure 11] FIG. 2 is a schematic diagram of the static pressure at each position of the flow field distribution of the double-bladed strong suction vortex fan blade of this embodiment at a rotation speed of 5400 rpm. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to make the technical problems, technical solutions and beneficial effects that the present application aims to solve more clear and obvious, the present application will be described in more detail in conjunction with the following figures and examples. It should be understood that the specific examples described herein are only for interpreting the present application, and are not intended to limit the present application.

[0021] It should be understood that when an element is referred to as being "fixed to" or "mounted on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientations or positional relationships indicated by the terms "upper," "lower," "top," "bottom," "inner," "outer," etc. are orientations or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description of this application, and do not indicate or imply that the referenced devices or elements must have a particular orientation or be configured and operated in a particular orientation, and should not be understood as limitations on this application.

[0023] It should be noted that the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying the relative importance or the number of technical features being indicated. A feature qualified by "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless there is a more clear and specific limitation, "plurality" means two or more.

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear and obvious, the present invention will be further described in detail in conjunction with the following drawings and examples.

[0025] 1 to 3, this embodiment provides a double-bladed powerful suction vortex fan blade, which includes a base 10, a plurality of centrifugal blades 20, and a plurality of axial blades 30, where the plurality of centrifugal blades 20 are circumferentially arranged around the outer periphery of the base 10, and there is a gap 40 between each two adjacent centrifugal blades 20, and the centrifugal blades 20 have a relatively large axial depth so that the centrifugal blades 20 can push the air in the gap 40 in a radial direction. The plurality of axial blades 30 are also circumferentially arranged around the outer periphery of the base 10, and the axial blades 30 are installed on the suction side of the centrifugal blades 20, and the axial blades 30 extend obliquely to the axial direction. When the axial blades 30 and the centrifugal blades 20 rotate together, the axial blades 30 are used to improve the axial air intake capacity of the fan blades. In other words, the axial blades 30 can prevent the air radially sent out by the centrifugal blades 20 from overflowing in the opposite direction along the intake side through the gaps 40, thereby reducing the occurrence of reflux, further improving the ability of the fan blades to overcome impedance, and finally improving the air volume of the fan blades.

[0026] Here, extending along the axial direction may mean extending outward from the central axis.

[0027] 2, 3, 6 and 7, the number of centrifugal blades 20 in this embodiment is 2N times the number of axial blades 30, and therefore the number of gaps 40 is also 2N times the number of axial blades 30, where N is a positive integer. Each axial blade 30 extends obliquely to the axial direction and gradually approaches two adjacent gaps 40, so that each axial blade 30 can guide the outside air into the corresponding two gaps 40 in an orderly manner. The orderly guidance of the outside air into the corresponding gaps 40 can further improve the axial intake ability of the fan blades, that is, it can prevent the air blown out in the radial direction by the centrifugal blades 20 from overflowing in the reverse direction along the intake side through the gaps 40, thereby further reducing the occurrence of reflux, further improving the ability of the fan blades to overcome impedance, and ultimately improving the air volume of the fan blades.

[0028] Here, it may be understood that each axial blade 30 gradually approaches two adjacent gaps 40 as it extends obliquely to the axial direction, and the plane on which it lies as it extends obliquely to the axial direction approaches the plane on which the centrifugal fan blades are located.

[0029] For example, N is 1, i.e., twice the number of centrifugal blades 20 and twice the number of axial blades 30. N is 2, i.e., four times the number of centrifugal blades 20 and twice the number of axial blades 30. N may be any other positive integer, and for convenience of description, the following embodiments will be described with reference to an example where N is 1, but the present application is not limited thereto.

[0030] 2, 3, 6 and 7, the number of centrifugal blades 20 in this embodiment is twice that of axial blades 30, and therefore the number of gaps 40 is also twice that of axial blades 30. Each axial blade 30 extends obliquely to the axial direction and gradually approaches two adjacent gaps 40. Therefore, each axial blade 30 can guide the outside air into the corresponding two gaps 40 in an orderly manner. By guiding the outside air into the corresponding gaps 40 in an orderly manner, the axial intake ability of the fan blades can be further improved, that is, the air sent out radially by the centrifugal blades 20 can be prevented from overflowing in the opposite direction along the intake side through the gaps 40, thereby further reducing the occurrence of reflux, further improving the impedance overcoming ability of the fan blades, and ultimately improving the air volume of the fan blades.

[0031] 2 to 7, the surface of the axial blade 30 facing the centrifugal blade 20 is the first airflow surface 301, and the surface of the axial blade 30 facing away from the centrifugal blade 20 is the second airflow surface 302. The first airflow surface 301 and the second airflow surface 302 of each axial blade 30 are both inclined in the axial direction and gradually approach the gaps 40. The axial projections of the first airflow surface 301 and the second airflow surface 302 are both within the same two adjacent gaps 40, so that the first airflow surface 301 of one of the axial blades 30 and the second airflow surface 302 of the adjacent axial blade 30 can together guide the outside air into the corresponding two gaps 40 in an orderly manner.

[0032] It should be noted that designing the number of centrifugal blades 20 to be twice that of axial blades 30 is a specific choice. The more the number of axial blades 30 corresponds to the number of centrifugal blades 20 one-to-one, the more the axial blades 30 tend to be parallel to the axial direction when extending obliquely, which reduces the axial air intake performance of the axial blades 30. Also, the larger the number of axial blades 30, the smaller the outer diameter of each axial blade 30, which makes it more difficult to form the axial blades 30. If the number of centrifugal blades 20 is designed to be three or more times that of the axial blades 30, the number of axial blades 30 will be reduced, i.e., as the number of axial blades 30 decreases, the axial air intake performance will also decrease. Furthermore, the overflow of air in the gaps 40 to the intake side will be more difficult to suppress, which will cause a relatively large amount of reflux.

[0033] Referring to FIG. 7, the first airflow guide surface 301 and the second airflow guide surface 302 both have a curved structure that is concave toward the centrifugal blade 20. The axial flow blade 30 having such a structure is also called a dragonfly wing blade because it resembles a dragonfly wing. The axial flow blade 30 as a dragonfly wing blade has stronger wind suction performance.

[0034] 5 and 7, the centrifugal blade 20 includes a guide portion 201 and a blowing portion 202, which are connected in sequence in a direction gradually moving away from the base 10. The guide portion 201 protrudes in the rotation direction of the centrifugal blade 20, and the blowing portion 202 protrudes in the opposite direction to the rotation direction of the centrifugal blade 20. The blowing portion 202 is the main part that does work on the gas. The centrifugal blade 20 with this structure has stronger blowing performance and can appropriately suppress the occurrence of reflux, thereby improving the air volume of the fan. The ends of the first air guide surface 301 and the second air guide surface 302 that are away from the base 10 (i.e., the positions of points M and N in Figure 7) both extend to adjacent positions at the connection between the guide section 201 and the blowing section 202, so that the two adjacent axial blades 30 can both guide the outside air along the guide section 201 to quickly enter the blowing section 202, preventing the gas located in the guide section 201 from overflowing in the opposite direction out along the intake side, thereby further reducing the occurrence of reflux, further improving the ability of the fan blades to overcome impedance, and ultimately improving the air volume of the fan blades.

[0035] Referring again to Figure 7, the surface of the guide portion 201 facing the axial blade 30 is the first side surface 2011, and the first air guide surface 301 extends obliquely in the axial direction to a position adjacent to the first side surface 2011 of the first centrifugal blade 21, and the end of the first air guide surface 301 away from the base 10 (i.e., point M in Figure 7) extends to a position adjacent to the connecting point between the guide portion 201 and the blowing portion 202 of the second centrifugal blade 22, where the first centrifugal blade 21 and the second centrifugal blade 22 are two adjacent centrifugal blades 20 arranged in sequence along the rotation direction of the fan blade. This design improves the air intake capacity of the axial flow blade 30, and at the same time reduces the gap between the first side surface 2011 and the first air guide surface 301, thereby minimizing the gas from overflowing from the gap between the first side surface 2011 and the first air guide surface 301 as it enters the gap 40, further reducing the occurrence of reflux and improving the fan blade's ability to overcome impedance, ultimately improving the airflow of the fan blade.

[0036] Referring again to FIG. 7, the first side surface 2011 has a curved structure that is concave in the axial direction. That is, the inner rings of all the blowing sections 202 form a circumferential housing space 50, and the above-mentioned multiple axial flow blades 30 are accommodated in this housing space 50 and are distributed at intervals in the circumferential direction, thereby reducing the thickness of the fan blades and allowing them to be used in the interior spaces of current thin notebook computers.

[0037] Referring to FIG. 1, the double-bladed strong suction vortex fan blade of this embodiment further includes an outer ring 60, which is connected to the blowing section 202 of every centrifugal blade 20, to improve the rigidity of the blowing section 202 and avoid the relatively large deformation that occurs when the blowing section 202 is subjected to the reaction force of the gas.

[0038] 8 to 11, Fig. 8 is a schematic diagram of the airflow values ​​at each position of the flow field distribution of a typical fan blade (only centrifugal blade 20) at a rotation speed of 5400 rpm, Fig. 9 is a schematic diagram of the static pressure at each position of the flow field distribution of a typical fan blade (only centrifugal blade 20) at a rotation speed of 5400 rpm, Fig. 10 is a schematic diagram of the airflow values ​​at each position of the flow field distribution of the double-bladed, powerful suction vortex fan blade of this embodiment at a rotation speed of 5400 rpm, and Fig. 11 is a schematic diagram of the static pressure at each position of the flow field distribution of the double-bladed, powerful suction vortex fan blade of this embodiment at a rotation speed of 5400 rpm. The experimental data summarized in Figs. 8 to 11 are as follows:

[0039] Table 1 JPEG2025537442000002.jpg23170

[0040] As can be seen from the data in the above table, when the rotation speeds are the same, the maximum static pressure of the double-bladed fan blades of this embodiment is basically the same, and the maximum air volume increases by about 15%.

[0041] To sum up, each axial blade 30 of this embodiment can guide the outside air into the corresponding two gaps 40 in an orderly manner, greatly improving the axial air intake capacity and significantly suppressing the phenomenon of air overflowing in the opposite direction in the gaps 40, thereby significantly reducing the occurrence of reflux, further improving the ability to overcome impedance, and significantly increasing the air volume of the fan. In particular, when a relatively large number of centrifugal blades 20 need to be designed, the number of axial blades 30 as dragonfly blades will be denser, the air intake will be smoother, and the rate of improvement in air volume will be more significant, making this fan very suitable for use as a fan blade for the heat dissipation fan inside a notebook computer.

[0042] This embodiment further provides a fan, which includes a motor and the above-mentioned double-bladed powerful suction vortex fan blade. The motor output shaft is connected to the double-bladed powerful suction vortex fan blade, and the motor is used to drive and rotate the double-bladed powerful suction vortex fan blade. By adopting the above-mentioned double-bladed powerful suction vortex fan blade, this fan can significantly improve the air volume while maintaining almost the same static pressure, and can meet the heat dissipation demands of light, thin and high-performance laptops.

[0043] This embodiment further provides an electronic device, which includes the above-mentioned fan. For example, the electronic device is a laptop computer, and the fan is placed inside the laptop computer and used to dissipate heat from the circuit module inside the laptop computer. Since the fan has extremely excellent heat dissipation performance, the tolerance performance of the electronic device of this embodiment can be further enhanced.

[0044] The above is merely a preferred embodiment of the present invention, and describes only the technical principles of the present invention. These descriptions are merely for interpreting the principles of the present invention, and should not be construed as limiting the protection scope of the present invention in any manner. Based on this interpretation, all arbitrary modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without any creative efforts, should all be included within the protection scope of the present invention. [Explanation of symbols]

[0045] 10, base, 20, centrifugal blade, 21, first centrifugal blade, 22, second centrifugal blade, 201, guide portion, 2011, first side surface, 202, blowing portion, 30, axial flow blade, 301, first air guide surface, 302, second air guide surface, 40, gap, 50, accommodation space, 60, outer ring.

Claims

1. A double-bladed powerful suction vortex fan blade, comprising: a base; and a plurality of centrifugal blades and a plurality of axial blades, each connected to the base; a plurality of centrifugal blades and a plurality of axial blades are respectively arranged circumferentially around the outer periphery of the base, and the plurality of axial blades are arranged on the intake side of the plurality of centrifugal blades, there is a gap between every two adjacent centrifugal blades, the number of the centrifugal blades is twice the number of the axial blades, thereby making the number of gaps twice the number of the axial blades, and each of the axial blades extends obliquely to the axial direction and gradually approaches the two adjacent gaps opposite to it, so that each of the axial blades can guide the outside air into the corresponding two gaps in an orderly manner.

2. 2. The double-bladed powerful suction vortex fan blade according to claim 1, wherein the surface of the axial blade facing the centrifugal blade is a first airflow surface, and the surface of the axial blade facing away from the centrifugal blade is a second airflow surface, the first airflow surface and the second airflow surface of each axial blade gradually approach the gap at an angle to the axial direction, and the axial projections of the first airflow surface and the second airflow surface of each axial blade are both contained within the same two adjacent gaps, so that the first airflow surface of that axial blade and the second airflow surface of another adjacent axial blade can both guide outside air to enter the corresponding two gaps in an orderly manner.

3. 3. The double-bladed powerful suction vortex fan blade according to claim 2, wherein the first airflow guide surface and the second airflow guide surface are both curved and concave toward the centrifugal blade.

4. The centrifugal blade includes a guide portion and a blower portion, the guide portion and the blower portion are connected in order along a direction gradually moving away from the base, the guide portion protrudes along a rotation direction of the centrifugal blade, and the blower portion protrudes along a direction opposite to the rotation direction of the centrifugal blade, 4. The double-bladed powerful suction vortex fan blade according to claim 3, wherein the ends of the first air guide surface and the second air guide surface that are far from the base both extend to positions adjacent to the connecting point between the guide section and the blower section.

5. a surface of the guide portion facing the axial-flow blade is a first side surface, the first air guide surface extends obliquely with respect to the axial direction to a position adjacent to the first side surface of the first centrifugal blade, and an end of the first air guide surface away from the base extends to a position adjacent to a connecting point between the guide portion of the second centrifugal blade and the air blowing portion, 5. The double-bladed powerful suction vortex fan blade according to claim 4, wherein the first centrifugal blade and the second centrifugal blade are two adjacent centrifugal blades arranged in sequence along the rotation direction of the fan blade.

6. 6. The double-bladed powerful suction vortex fan blade according to claim 5, wherein the first side surface has a curved structure concave along the axial direction, so that the inner rings of all the blowing sections form a circumferential accommodation space, and the axial blades are accommodated in the accommodation space.

7. 5. The double-bladed powerful suction vortex fan blade according to claim 4, further comprising an outer ring, the outer ring being connected to the blowing sections of all the centrifugal blades.

8. A double-bladed powerful suction vortex fan blade, comprising: a base; and a plurality of centrifugal blades and a plurality of axial blades, each connected to the base; a plurality of centrifugal blades and a plurality of axial blades are respectively arranged circumferentially around the outer periphery of the base, and the plurality of axial blades are arranged on the intake side of the plurality of centrifugal blades, there is a gap between every two adjacent centrifugal blades, the number of the centrifugal blades is 2N times the number of the axial blades, and accordingly the number of the gaps is also 2N times the number of the axial blades, each of the axial blades extends obliquely to the axial direction and gradually approaches the two adjacent gaps opposite to it, so that each of the axial blades can guide the outside air into the corresponding two gaps in an orderly manner, N>1, and N is an integer.

9. 9. The double-bladed powerful suction vortex fan blade according to claim 8, wherein the surface of the axial blade facing the centrifugal blade is a first airflow surface, and the surface of the axial blade facing away from the centrifugal blade is a second airflow surface, the first airflow surface and the second airflow surface of each axial blade gradually approach the gap at an angle to the axial direction, and the axial projections of the first airflow surface and the second airflow surface of each axial blade are both contained within the same two adjacent gaps, so that the first airflow surface of that axial blade and the second airflow surface of another adjacent axial blade can both guide outside air to enter the corresponding two gaps in an orderly manner.

10. 10. The double-bladed powerful suction vortex fan blade according to claim 9, wherein the first airflow guide surface and the second airflow guide surface are both curved and concave toward the centrifugal blade.

11. The centrifugal blade includes a guide portion and a blower portion, the guide portion and the blower portion are connected in order along a direction gradually moving away from the base, the guide portion protrudes along a rotation direction of the centrifugal blade, and the blower portion protrudes along a direction opposite to the rotation direction of the centrifugal blade, 11. The double-bladed powerful suction vortex fan blade according to claim 10, wherein the ends of the first air guide surface and the second air guide surface that are far from the base extend to positions adjacent to the connecting point between the guide section and the blower section.

12. a surface of the guide portion facing the axial-flow blade is a first side surface, the first air guide surface extends obliquely with respect to the axial direction to a position adjacent to the first side surface of the first centrifugal blade, and an end of the first air guide surface away from the base extends to a position adjacent to a connecting point between the guide portion of the second centrifugal blade and the air blowing portion, The double-bladed powerful suction vortex fan blade according to claim 11, wherein the first centrifugal blade and the second centrifugal blade are two adjacent centrifugal blades arranged in sequence along the rotation direction of the fan blade.

13. 13. The double-bladed powerful suction vortex fan blade according to claim 12, wherein the first side surface has a curved structure concave along the axial direction, so that the inner rings of all the blowing sections form a circumferential accommodation space, and the axial blades are accommodated in the accommodation space.

14. 12. The double-bladed powerful suction vortex fan blade according to claim 11, further comprising an outer ring, the outer ring being connected to the blowing sections of all the centrifugal blades.

15. A fan, characterized in that it employs a double-blade type powerful suction vortex fan blade according to any one of claims 1 to 14.

16. An electronic device comprising the fan according to claim 15.

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