Double-wing type powerful suction vortex fan blades, fan 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 filed with the China National Intellectual Property Administration on August 23, 2023, with application number 202311065594.X and invention title "Two-wing type powerful suction vortex fan blade, fan and electronic device", the entire content of which is incorporated herein by reference.

[0002] The present invention relates to the technical field of fans, and particularly to two-wing type powerful suction vortex fan blades, fans and electronic devices.

Background Art

[0003] Conventional general fans are often axial fans or centrifugal fans. An axial fan may be understood as a fan in which air enters from the axial direction of the fan and blows out along the axial direction. For example, it can be a household ceiling fan or a small fan used on a desk. A centrifugal fan, also known as a radial fan, may be understood as a fan in which air enters from the axial direction of the fan but blows out radially outward along the fan. Currently, with the trend of improving the performance, thinning, lightening and higher heat dissipation performance of notebook computers, the fans inside notebook computers often adopt centrifugal fans to quickly release the heat inside the notebook computer.

[0004] Specifically, there is a reflux phenomenon in a general centrifugal fan. The so-called reflux means that the air pushed radially by the centrifugal blade cannot actually complete the discharge outside. When this air is sent out radially, a small part of it overflows along the reverse direction of the axial intake direction and collides with the air that has just entered in the axial direction, and then forms a vortex inside the fan. When the centrifugal blade rotates, there is a certain impedance, which may also be understood as having a certain impact on the air volume.

[0005] More specifically, there are currently combined fans that utilize both axial and centrifugal blades. The axial blades guide the airflow to the centrifugal blades, effectively suppressing the outflow of air pushed by the centrifugal blades along the axial direction. This reduces recirculation, improves the fan's ability to overcome impedance, and increases airflow. However, conventional technology simply combines axial and centrifugal blades into a single unit, resulting in limitations on the reduction of recirculation. This means the centrifugal blades' ability to overcome impedance when rotating remains relatively weak, causing the fan to lose a considerable amount of energy without significantly increasing airflow. As laptops perform better and have higher heat dissipation requirements, they need fans with stronger impedance-overcoming capabilities and higher airflow. How to significantly reduce recirculation, improve impedance-overcoming capabilities, and dramatically increase fan airflow remains an unresolved technical challenge in the fan field. [Overview of the project] [Problems that the invention aims to solve]

[0006] The object of the present invention is to provide a double-wing type powerful suction vortex fan blade, fan, and electronic equipment that solves the technical problem that conventional centrifugal fans have a relatively weak ability to overcome impedance, which results in relatively low airflow. [Means for solving the problem]

[0007] To achieve this objective, the present invention employs the following technical approach.

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

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

[0010] In one of these technical proposals, both the first air guide surface and the second air guide surface have a curved structure that is recessed into the centrifugal blade.

[0011] In one of the proposed technologies, the centrifugal blade includes a guide section and a blower section, The guide section and the blowing section are connected in sequence along a direction that gradually moves away from the base, the guide section protrudes along the rotation direction of the centrifugal blade, and the blowing section protrudes along the opposite direction to the rotation direction of the centrifugal blade. The ends of the first and second air guide surfaces that separate from the base both extend to a position adjacent to the connection point between the guide section and the air blowing section.

[0012] In one of these technical proposals, the surface of the guide portion facing the axial flow blade is the first side surface, the first air guide surface extends diagonally to a position adjacent to the first side surface on the first centrifugal blade, and the end of the first air guide surface that separates from the base extends to a position adjacent to the connection point between the guide portion and the blower portion of the second centrifugal blade. Here, the first centrifugal blade and the second centrifugal blade are two adjacent centrifugal blades arranged in order along the rotational direction of the fan blade.

[0013] In one of these technical proposals, the first side surface is a curved structure that is concave along the axial direction, thereby forming a housing space around all of the inner rings of the blower section, and the axial flow blades are housed within the housing space.

[0014] In one of these proposed technologies, the double-winged powerful suction vortex fan blades further include an outer ring, the outer ring being connected to the blower section of all the centrifugal blades.

[0015] This application further provides a fan which employs the double-winged powerful suction vortex fan blades described in any one of the above technical proposals.

[0016] This application further provides an electronic device which includes a fan of the above-mentioned technical invention. [Effects of the Invention]

[0017] Compared to conventional technology, the double-winged powerful suction vortex fan blade according to the present invention has at least the following beneficial effects.

[0018] This design also employs a combined structure of centrifugal and axial blades. The axial blades not only improve the axial air intake capacity but also suppress the phenomenon of air pushed by the centrifugal blades overflowing in the opposite direction of intake. Specifically, this design designs the number of axial blades to be half the number of centrifugal blades and designs each axial blade to gradually approach two adjacent gaps at an angle. This allows each axial blade to guide the outside air into the two corresponding gaps in an orderly manner, thereby greatly improving the axial air intake capacity and greatly suppressing the phenomenon of air pushed by the centrifugal blades overflowing in the opposite direction, significantly reducing the occurrence of recirculation, improving the ability to overcome impedance, and greatly increasing the fan's airflow. The rate of improvement in airflow becomes even more apparent when a relatively large number of centrifugal blades are required (for example, when fan blades are used in the internal space of a laptop computer). [Brief explanation of the drawing]

[0019] To more clearly illustrate embodiments of the present invention or technical concepts in the prior art, the following briefly introduces the drawings that may be used in the embodiments or prior art descriptions. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without expending any creative effort. [Figure 1] This is a schematic diagram of the structure of a double-wing type powerful suction vortex fan blade according to an embodiment of this application. [Figure 2] This is a front view of a double-wing type powerful suction vortex fan blade according to an embodiment of the present application. [Figure 3] Figure 2 shows a localized enlarged view of area A. [Figure 4] This is a rear view of a double-wing type powerful suction vortex fan blade according to an embodiment of this application. [Figure 5] Figure 4 is a localized magnified view of point B. [Figure 6]It is a schematic diagram of the structure of a two-wing type powerful suction vortex fan blade at another angle according to an embodiment of the present application. [Figure 7] It is a partial enlarged view at C in FIG. 6. [Figure 8] It is a schematic diagram of the air volume value at each position of the flow field distribution of a general fan blade at a rotational speed of 5400 rpm. [Figure 9] It is a schematic diagram of the static pressure at each position of the flow field distribution of a general fan blade at a rotational speed of 5400 rpm. [Figure 10] It is a schematic diagram of the air volume value at each position of the flow field distribution of the two-wing type powerful suction vortex fan blade of this embodiment at a rotational speed of 5400 rpm. [Figure 11] It is a schematic diagram of the static pressure at each position of the flow field distribution of the two-wing type powerful suction vortex fan blade of this embodiment at a rotational speed of 5400 rpm.

Embodiments for Carrying out the Invention

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more obvious, the present application will be further described in detail below in conjunction with the following drawings and embodiments. It should be understood that the specific embodiments described here are only for interpreting the present application and not for limiting the present application.

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

[0022] It should be understood that the directions or positional relationships indicated by terms such as "up," "down," "top," "bottom," "inside," and "outside" are directions or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description in this application. They do not indicate or imply that the mentioned device or element has a specific direction or must be configured and operated in a specific direction, and therefore should not be understood as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are merely for the purpose of describing the objective and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features being referred to. Accordingly, features limited by "first" and "second" may explicitly or implicitly include one or more such features. In the description of this application, unless otherwise specified and more clearly defined, "multiple" means two or more.

[0024] To make the object, technical concept, and advantages of the present invention clearer and more evident, the present invention will be described in further detail with reference to the following drawings and embodiments.

[0025] Referring to Figures 1 to 3, this embodiment provides a double-winged powerful suction vortex fan blade, which comprises a connected base 10, a plurality of centrifugal blades 20, and a plurality of axial blades 30, wherein the plurality of centrifugal blades 20 are arranged circumferentially around the outer circumference of the base 10, with a gap 40 between each of two adjacent centrifugal blades 20, the depth extending along the axial direction of the centrifugal blades 20 is relatively thick, thereby allowing the centrifugal blades 20 to push the gas in the gap 40 to be ejected radially, and the plurality of axial blades 30 are also arranged circumferentially around the outer circumference of the base 10, the axial blades 30 are located on the intake side of the centrifugal blades 20, and the axial blades 30 extend obliquely with respect to the axial direction. When the axial flow blade 30 and the centrifugal blade 20 rotate together, the axial flow blade 30 is used to improve the axial air intake capacity of the fan blade. In other words, the axial flow blade 30 can suppress the airflow radially pushed out by the centrifugal blade 20 from overflowing outwards along the intake side through the gap 40, thereby reducing the generation of recirculation, improving the ability to overcome the impedance of the fan blade, and ultimately increasing the airflow of the fan blade.

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

[0027] Specifically, referring to Figures 2, 3, 6, and 7, the number of centrifugal blades 20 in this embodiment is 2N times the number of axial blades 30, and consequently 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 diagonally with respect to the axial direction and gradually approaches two adjacent gaps 40, thereby guiding 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 capacity of the fan blades can be further improved. That is, the air blown radially by the centrifugal blades 20 is prevented from overflowing outwards along the intake side from the gaps 40, thereby further reducing the occurrence of recirculation, further improving the ability to overcome the impedance of the fan blades, and ultimately increasing the airflow of the fan blades.

[0028] Here, each axial flow blade 30 gradually approaches two adjacent gaps 40 as it extends obliquely with respect to the axial direction, and the plane in which it is positioned when it extends obliquely with respect to the axial direction may be understood to approach the plane in which the centrifugal fan blades are positioned.

[0029] For example, N is 1, i.e., twice the number of centrifugal blades 20 to the number of axial flow blades 30. N is 2, i.e., four times the number of centrifugal blades 20 to the number of axial flow blades 30. N may also be any other positive integer, and for the sake of explanation, the following embodiments will be described using N = 1 as an example, but this application is not limited thereto.

[0030] Specifically, referring to Figures 2, 3, 6, and 7, the number of centrifugal blades 20 in this embodiment is twice the number of axial blades 30, and consequently the number of gaps 40 is also twice the number of axial blades 30. Furthermore, each axial blade 30 gradually approaches two adjacent gaps 40 while extending diagonally with respect to the axial direction, thereby guiding 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 capacity of the fan blades can be further improved. That is, the air blown radially by the centrifugal blades 20 is prevented from overflowing outwards in the reverse direction along the intake side from the gaps 40, thereby further reducing the occurrence of recirculation, further improving the ability to overcome the impedance of the fan blades, and ultimately improving the airflow of the fan blades.

[0031] To explain in more detail, referring to Figures 2 to 7, the surface of the axial flow blade 30 facing the centrifugal blade 20 is the first air guide surface 301, and the surface of the axial flow blade 30 facing away from the centrifugal blade 20 is the second air guide surface 302. Both the first air guide surface 301 and the second air guide surface 302 of each axial flow blade 30 are inclined with respect to the axial direction and gradually approach the gap 40. Furthermore, the axial projections of the first air guide surface 301 and the second air guide surface 302 of the adjacent axial flow blade 30 both fall within the same two adjacent gaps 40. Thus, the first air guide surface 301 of one of the axial flow blades 30 and the second air guide surface 302 of the adjacent axial flow blade 30 can both guide the outside air into the corresponding two gaps 40 in an orderly manner.

[0032] It should be added here that designing the number of centrifugal blades 20 to be twice the number of axial flow blades 30 is a specific choice. When the number of axial flow blades 30 corresponds one-to-one with the number of centrifugal blades 20, the axial flow blades 30 tend to be parallel to the axial direction when they extend diagonally. In this case, the axial air intake performance of the axial flow blades 30 decreases, and the large number of axial flow blades 30 causes the outer diameter of each axial flow blade 30 to become smaller, and further causes the difficulty of molding the axial flow blades 30 to increase. When the number of centrifugal blades 20 is designed to be three times or more than three times the number of axial flow blades 30, the number of axial flow blades 30 decreases, that is, as the number of axial flow blades 30 decreases, their axial air intake performance also decreases, and it becomes more difficult to suppress the overflow of air in the gap 40 to the intake side, i.e., it generates a relatively large amount of recirculation.

[0033] Referring to Figure 7, both the first air guide surface 301 and the second air guide surface 302 are curved surfaces that are recessed into the centrifugal blade 20. An axial flow blade 30 with such a structure is also called a dragonfly wing blade because it resembles a dragonfly's wing, and an axial flow blade 30 as a dragonfly wing blade has stronger air intake performance.

[0034] Referring to Figures 5 and 7, the centrifugal blade 20 includes a guide section 201 and a blower section 202, which are connected sequentially along a direction gradually away from the base 10, the guide section 201 protruding along the direction of rotation of the centrifugal blade 20, and the blower section 202 protruding along the opposite direction of rotation of the centrifugal blade 20, the blower section 202 being the main part that does work on the gas, and a centrifugal blade 20 of this structure has stronger airflow performance and can appropriately suppress the generation of recirculation, thereby improving the airflow of the fan. The ends of the first air guide surface 301 and the second air guide surface 302 that detach from the base 10 (i.e., points M and N in Figure 7) both extend over adjacent positions to the connection point between the guide section 201 and the blower section 202. This allows the two adjacent axial flow blades 30 to guide outside air quickly into the blower section 202 along the guide section 201, preventing the gas located on the guide section 201 from overflowing outwards along the intake side. This further reduces the occurrence of recirculation, improves the ability to overcome the impedance of the fan blades, and ultimately increases the airflow of the fan blades.

[0035] Referring again to Figure 7, the surface of the guide section 201 that faces the axial flow blade 30 is the first side surface 2011, the first air guide surface 301 extends diagonally 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 that separates from the base 10 (i.e., point M in Figure 7) extends to a position adjacent to the connection point between the guide section 201 and the blower section 202 on the second centrifugal blade 22, where the first centrifugal blade 21 and the second centrifugal blade 22 are two adjacent centrifugal blades 20 arranged sequentially along the rotation direction of the fan blade. This design improves the air intake capacity of the axial flow blade 30, while simultaneously reducing the gap between the first side surface 2011 and the first air guide surface 301. This minimizes spillage from the gap between the first side surface 2011 and the first air guide surface 301 during the process of gas entering the gap 40, further reducing the occurrence of recirculation and improving the ability to overcome the impedance of the fan blade, ultimately increasing the airflow of the fan blade.

[0036] Referring again to Figure 7, the first side surface 2011 has a curved structure that is concave along the axial direction. That is, the inner rings of all the air blowers 202 form a housing space 50 all around, and the multiple axial flow blades 30 are housed within this housing space 50 and distributed at intervals in the circumferential direction, thereby reducing the thickness of the fan blades and allowing them to be used in the internal space of current thin notebook computers.

[0037] Referring to Figure 1, the double-winged powerful suction vortex fan blades of this embodiment further include an outer ring 60, which is connected to the blower section 202 of all centrifugal blades 20 to improve the rigidity of the blower section 202 and avoid relatively large deformations that occur when the blower section 202 is subjected to the reaction force of the gas.

[0038] Referring to Figures 8 to 11, Figure 8 is a schematic diagram of the airflow values ​​at each position in the flow field distribution at a rotational speed of 5400 rpm for a typical fan blade (centrifugal blade 20 only), Figure 9 is a schematic diagram of the static pressure at each position in the flow field distribution at a rotational speed of 5400 rpm for a typical fan blade (centrifugal blade 20 only), Figure 10 is a schematic diagram of the airflow values ​​at each position in the flow field distribution at a rotational speed of 5400 rpm for the double-wing type powerful suction vortex fan blade of this embodiment, and Figure 11 is a schematic diagram of the static pressure at each position in the flow field distribution at a rotational speed of 5400 rpm for the double-wing type powerful suction vortex fan blade of this embodiment. The experimental data summarizing Figures 8 to 11 is as follows.

[0039] Table 1 JPEG0007868265000001.jpg23170

[0040] As can be seen from the data in the table above, when the rotational speeds are the same, the maximum static pressure of the double-bladed fan blades in this embodiment is essentially the same, and the maximum airflow is increased by approximately 15%.

[0041] In summary, each axial flow blade 30 in this embodiment can neatly guide outside air into the corresponding two gaps 40, significantly improving the axial air intake capacity and greatly suppressing the phenomenon of air overflowing in the reverse direction in the gaps 40, thereby greatly reducing the occurrence of recirculation, further improving the ability to overcome impedance, and significantly increasing the fan's airflow. In particular, when it is necessary to design a relatively large number of centrifugal blades 20, the number of axial flow blades 30 as dragonfly wing blades becomes denser, the air intake becomes smoother, the rate of improvement in airflow becomes more apparent, and it is highly applicable as a fan blade for a heat dissipation fan inside a laptop computer.

[0042] This embodiment further provides a fan which includes a motor and the above-mentioned double-winged powerful suction vortex fan blades, the motor output shaft being connected to the double-winged powerful suction vortex fan blades, the motor being used to drive and rotate the double-winged powerful suction vortex fan blades, and by employing the above-mentioned double-winged powerful suction vortex fan blades, this fan significantly improves the airflow while maintaining almost constant static pressure, thus meeting the heat dissipation requirements of lightweight, thin, and high-performance laptop computers.

[0043] This embodiment further provides an electronic device which includes the fan described above. For example, the electronic device is a laptop computer, and the fan is placed inside the laptop computer and used for heat dissipation to the circuit modules inside the laptop computer. Since a fan with extremely excellent heat dissipation performance is employed, the allowable performance of the electronic device in this embodiment can be further enhanced.

[0044] The above describes only preferred embodiments of the present invention and the technical principles of the invention, and these descriptions are for the purpose of interpreting the principles of the invention and should not be interpreted in any way as a limitation on the scope of protection of the invention. Based on this interpretation, all modifications, equivalent substitutions and improvements made in the spirit and principles of the invention, and other specific embodiments of the invention that a person skilled in the art could imagine without creative effort, should all be included within the scope of protection of the invention. [Explanation of symbols]

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

Claims

1. A double-wing type 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, Multiple centrifugal blades and multiple axial flow blades are arranged circumferentially around the outer circumference of the base, and the multiple axial flow blades are installed on the intake side of the multiple centrifugal blades, with a gap between each pair of adjacent centrifugal blades, the number of centrifugal blades being twice the number of axial flow blades, thereby doubling the number of gaps, and each axial flow blade extends obliquely with respect to the axial direction and gradually approaches two adjacent gaps facing each other, so that each axial flow blade can guide outside air into the corresponding two gaps in an orderly manner. The surface of the axial flow blade facing the centrifugal blade is a first air guide surface, and the surface of the axial flow blade facing away from the centrifugal blade is a second air guide surface, and both the first air guide surface and the second air guide surface of each axial flow blade gradually approach the gap at an angle with respect to the axial direction, and the projections of the first air guide surface and the second air guide surface of each axial flow blade along the axial direction both fall within the same two adjacent gaps, so that the first air guide surface of one axial flow blade and the second air guide surface of another adjacent axial flow blade can together guide outside air into the corresponding two gaps in an orderly manner. A double-winged, powerful suction vortex fan blade characterized by its features.

2. The double-wing type powerful suction vortex fan blade according to claim 1, characterized in that both the first air guide surface and the second air guide surface have a curved surface structure that is recessed into the centrifugal blade.

3. The centrifugal blade includes a guide section and a blower section, The guide section and the blowing section are connected in sequence along a direction that gradually moves away from the base, the guide section protrudes along the rotation direction of the centrifugal blade, and the blowing section protrudes along the opposite direction to the rotation direction of the centrifugal blade. The double-wing type powerful suction vortex fan blade according to claim 2, characterized in that the ends of the first air guide surface and the second air guide surface that separate from the base both extend to a position adjacent to the connection point between the guide portion and the air blowing portion.

4. The surface of the guide portion facing the axial flow blade is the first side surface, the first air guide surface extends diagonally in the axial direction to a position adjacent to the first side surface of the first centrifugal blade, and the end of the first air guide surface that separates from the base extends to a position adjacent to the connection point between the guide portion and the blower portion of the second centrifugal blade. The double-wing type powerful suction vortex fan blade according to claim 3, characterized in that the first centrifugal blade and the second centrifugal blade are two adjacent centrifugal blades arranged sequentially along the rotation direction of the fan blade.

5. The double-wing type powerful suction vortex fan blade according to claim 4, characterized in that the first side surface is a curved surface structure that is concave along the axial direction, thereby forming a housing space around all of the inner rings of the blower section, and the axial flow blades are housed within the housing space.

6. The double-wing type powerful suction vortex fan blade according to claim 3, wherein the double-wing type powerful suction vortex fan blade further includes an outer ring, the outer ring being connected to the blower portion of all the centrifugal blades.

7. A double-wing type 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 double-wing type powerful suction vortex fan blade characterized in that a plurality of centrifugal blades and a plurality of axial flow blades are each circumferentially arranged on the outer circumference of the base, and the plurality of axial flow blades are installed on the intake side of the plurality of centrifugal blades, there is a gap between each pair of adjacent centrifugal blades, the number of centrifugal blades is 2N times the number of axial flow blades, and so the number of gaps is also 2N times the number of axial flow blades, and each axial flow blade extends obliquely with respect to the axial direction and gradually approaches two adjacent gaps facing each other, so that each axial flow blade can guide outside air to enter the corresponding two gaps in an orderly manner, N > 1, and N is an integer.

8. The double-wing type powerful suction vortex fan blade according to claim 7, characterized in that the surface of the axial flow blade facing the centrifugal blade is a first air guide surface, the surface of the axial flow blade facing away from the centrifugal blade is a second air guide surface, and both the first air guide surface and the second air guide surface of each axial flow blade gradually approach the gap at an angle with respect to the axial direction, and the projections of the first air guide surface and the second air guide surface of each axial flow blade along the axial direction both fall within the same two adjacent gaps, so that the first air guide surface of one axial flow blade and the second air guide surface of another adjacent axial flow blade can both guide outside air into the corresponding two gaps in an orderly manner.

9. The double-wing type powerful suction vortex fan blade according to claim 8, characterized in that both the first air guide surface and the second air guide surface have a curved structure that is recessed into the centrifugal blade.

10. The centrifugal blade includes a guide section and a blower section, The guide section and the blowing section are connected in sequence along a direction that gradually moves away from the base, the guide section protrudes along the rotation direction of the centrifugal blade, and the blowing section protrudes along the opposite direction to the rotation direction of the centrifugal blade. The double-wing type powerful suction vortex fan blade according to claim 9, characterized in that the ends of the first air guide surface and the second air guide surface that leave the base both extend to a position adjacent to the connection point between the guide portion and the air blowing portion.

11. The surface of the guide portion facing the axial flow blade is the first side surface, the first air guide surface extends diagonally in the axial direction to a position adjacent to the first side surface of the first centrifugal blade, and the end of the first air guide surface that separates from the base extends to a position adjacent to the connection point between the guide portion and the blower portion of the second centrifugal blade. The double-wing type powerful suction vortex fan blade according to claim 10, characterized in that the first centrifugal blade and the second centrifugal blade are two adjacent centrifugal blades arranged sequentially along the rotation direction of the fan blade.

12. The double-wing type powerful suction vortex fan blade according to claim 11, characterized in that the first side surface is a curved surface structure that is concave along the axial direction, thereby forming a housing space around all of the inner rings of the blower section, and the axial flow blades are housed within the housing space.

13. The double-wing type powerful suction vortex fan blade according to claim 10, wherein the double-wing type powerful suction vortex fan blade further includes an outer ring, the outer ring being connected to the blower portion of all the centrifugal blades.

14. A fan characterized by employing a double-wing type powerful suction vortex fan blade as described in any one of claims 1 to 13.

15. An electronic device, characterized by including the fan described in claim 14.

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