Fan rotors, cooling fans, and electronic equipment

Abstract

The invention relates to a fan rotor, a cooling fan, and electronic equipment. The fan rotor includes a central axis, a plurality of first blades, a plurality of second blades, a first retaining ring, and a second retaining ring. The plurality of first blades are mounted around the central axis, and the first ends of the plurality of first blades are connected to the central axis. The plurality of second blades are mounted around the central axis, and the plurality of second blades are located on the outer circumference of the plurality of first blades. The first retaining ring is used to secure the first ends of the plurality of second blades, and the first retaining ring is mounted around the central axis. The second retaining ring is used to secure the second ends of the plurality of second blades, and the second retaining ring is mounted around the first retaining ring. The fan rotor, cooling fan, and electronic equipment according to the embodiment of this application can ensure stability in the operating process of the cooling fan.

Description

Technical Field

[0001] [Cross-reference to Related Applications] This application claims priority to a Chinese patent application filed with the Chinese Patent Office on May 21, 2024, with application number 202421116195.1 and invention title "Fan Rotor, Cooling Fan, and Electronic Device", and all of its content is incorporated herein by reference.

[0002] The embodiments of this application relate to the field of heat dissipation technology for electronic devices, and particularly to fan rotors, cooling fans, and electronic devices.

Background Art

[0003] As electronic devices continue to trend towards miniaturization in development, the problem of heat accumulation in electronic devices is becoming increasingly serious. In the operation process of electronic devices, continuous heat accumulation affects the normal operation of some components and is disadvantageous for electronic devices to exhibit relatively good performance. Therefore, it is necessary to dissipate the heat-generating components in electronic devices in a certain heat dissipation form.

[0004] Currently, air-cooled heat dissipation is still a relatively widely applied heat dissipation form. The air-cooled heat dissipation method uses a cooling fan for heat dissipation. The cooling fan can improve the air circulation rate during the operation process and timely transfer the heat in a specific area to the outside. The stability of the cooling fan during operation affects the heat dissipation ability of the cooling fan. Therefore, how to ensure the stability of the cooling fan during the operation process is an important issue.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The purpose of the embodiments of this application is to provide a fan rotor, a cooling fan, and an electronic device that can ensure the stability of the cooling fan during the operation process.

Means for Solving the Problems

[0006] To solve the above technical problems, embodiments of this application provide a fan rotor. The fan rotor includes a central shaft, a plurality of first blades, a plurality of second blades, a first retaining ring, and a second retaining ring. The plurality of first blades are mounted around the central shaft, and the first ends of the plurality of first blades are connected to the central shaft. The plurality of second blades are mounted around the central shaft, and the plurality of second blades are located on the outer circumference of the plurality of first blades. The first retaining ring is used to secure the first ends of the plurality of second blades, and the first retaining ring is mounted around the central shaft. The second retaining ring is used to secure the second ends of the plurality of second blades, and the second retaining ring is mounted around the first retaining ring.

[0007] Embodiments of this application further provide a cooling fan comprising a case, a fan stator, and the fan rotor. The fan stator is installed within the case, and the fan rotor is rotatably connected to the fan stator.

[0008] Embodiments of this application further provide an electronic device which includes the above-described heat dissipation fan.

[0009] In the fan rotor, heat dissipation fan, and electronic equipment according to the embodiments of this application, when arranging the second blade on the outer circumference of the first blade, fixing rings can be installed at both ends of the second blade, that is, multiple second blades are connected via the first fixing ring at the root position, and multiple second blades are connected via the second fixing ring at the end position. The first blade is directly connected to the outer circumference of the central axis. By arranging the fixing rings at both ends of the blades located on the outer ring, the connection area of ​​the blades is increased. The two types of blades are then connected to form a whole. The arrangement of multiple fixing rings can improve the stability of the interconnection of the outer ring blades and the stability of the connection with the inner ring blades, thereby ensuring stability in the operation process of the heat dissipation fan.

[0010] In some embodiments, extensions are provided on the first ends of some of the multiple second blades, and the extensions are connected to the central axis by passing through the gap between two adjacent first blades. In this way, the first ends of some of the second blades are integrally connected to the central axis via the extensions, which can improve stability when the two types of blades are connected to form a whole.

[0011] In some embodiments, extensions located at equal intervals are integrally connected to one another. By integrally connecting each extension at equal intervals in this way, a connection relationship can be established between each extension, which is advantageous in improving the connection stability between each extension and the central axis.

[0012] In some embodiments, a reinforcing section is installed between two adjacent extensions connected to the central axis, and the reinforcing section extends from the surface of the first fixing ring toward the central axis. By installing a reinforcing section between two adjacent extensions in this way, the connection strength between the two adjacent extensions can be improved.

[0013] In some embodiments, the first retaining ring is connected to edge positions located axially along the central axis of multiple second blades, and / or the second retaining ring is connected to edge positions located axially along the central axis of multiple second blades. By connecting the retaining rings to the edge positions of the second blades in this way, both connection structures can be simplified, and the connection between them can be easily realized.

[0014] In some embodiments, a first retaining ring is connected to a mid-position located axially along the central axis of multiple second blades, and / or a second retaining ring is connected to a mid-position located axially along the central axis of multiple second blades. By connecting the retaining rings to the mid-positions of the second blades in this way, the connection area between the two can be increased, thereby improving the connection strength between them.

[0015] In some embodiments, the multiple first blades are axial flow blades, and the multiple second blades are centrifugal blades. In this way, the outer ring centrifugal blades can form radial gas flow, while the inner ring axial flow blades can form axial gas flow, thereby improving the intake volume.

[0016] In some embodiments, the surface of the first blade does not protrude beyond the surface of the second blade in the axial direction of the central axis. By preventing the surface of the first blade from protruding beyond the surface of the second blade, it is advantageous to avoid the first blade occupying a relatively large amount of space. [Brief explanation of the drawing]

[0017] One or more embodiments are illustrated by corresponding images in the drawings, and these illustrative descriptions are not intended to limit the embodiments. Elements having the same reference numeral in the drawings are represented as similar elements unless otherwise specified, and the figures in the drawings are not intended to limit proportions. [Figure 1] This is a schematic perspective view of the fan rotor structure in a heat dissipation fan according to several embodiments of this application. [Figure 2] This is a schematic perspective view of the fan rotor structure in a heat dissipation fan according to some other embodiments of this application. [Figure 3] This is a schematic diagram of the upper structure of the fan rotor in a cooling fan according to some other embodiments of this application. [Figure 4] This is a schematic diagram of the perspective view structure of a fan rotor in a cooling fan according to some other embodiments of this application. [Figure 5] This is a schematic diagram of the perspective view structure of a fan rotor in a cooling fan according to some other embodiments of this application. [Figure 6] Figure 5 is a schematic diagram of the enlarged structure at A. [Figure 7] This is a schematic diagram of the perspective view structure of a fan rotor in a cooling fan according to some other embodiments of this application. [Figure 8] It is a schematic enlarged structure diagram at B in FIG. 7. [Figure 9] It is a schematic perspective structure diagram of an axial fan in the prior art. [Figure 10] It is a schematic perspective structure diagram of a centrifugal fan in the prior art.

Embodiments for Carrying Out the Invention

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will describe each embodiment of the present application in detail in conjunction with the drawings. However, as can be understood by those skilled in the art, in each embodiment of the present application, many technical details are proposed to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions according to the claims of the present invention can still be realized. The division of the following embodiments is for the convenience of description and should not constitute any limitation to the specific implementation manners of the present application. Each embodiment can be combined with each other and incorporated with each other on the premise of non-contradiction.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the art belonging to the technical field of the present application. The terms used in this specification are only for describing specific embodiments and are not for limiting the present application. The terms "comprising" and "having" and any variations thereof in the description of the specification, claims and drawings of the present application are intended to cover non-exclusive "comprising".

[0020] In the description of the embodiments of this application, unless otherwise clearly defined or limited, technical terms such as "attachment", "connection", "connection", etc. should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral one, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication inside two elements or an interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific situation.

[0021] With the continuous trend of miniaturization of electronic devices, the demand for heat dissipation is also increasing. For example, devices such as computers and laptops design many different heat dissipation forms such as air cooling and liquid cooling for devices with large heat generation. In air cooling heat dissipation, mainly a heat dissipation fan is adopted to dissipate heat from the heat generating member. The fan rotor of the heat dissipation fan can reinforce the air flow rate during the rotation process, thereby improving the heat exchange efficiency in the air. During the operation process of the heat dissipation fan, the heat generated during the operation process of the heat generating member in the electronic device can be continuously conducted to the surrounding air, and further heat dissipation can be completed.

[0022] Currently, the heat dissipation fans adopted by electronic devices include centrifugal fans and axial fans. The blades of the centrifugal fan can generate an air flow flowing along the radial direction of the central axis of the fan rotor, and the blades of the axial fan can generate an air flow flowing along the axial direction of the central axis of the fan rotor. The two heat dissipation fans have different characteristics respectively. By combining the blades of the two heat dissipation fans in the fan rotor, when dissipating heat in a specific area, the air intake and air pressure of the heat dissipation fan can be improved, and further the heat dissipation capacity of the heat dissipation fan can be improved.

[0023] In practice, the airflow and air pressure of a cooling fan can be improved by combining blades with rotor characteristics. Blades with rotor characteristics can be added to the fan rotor of a cooling fan, based on a centrifugal blade design. This ensures the sweeping capability of the cooling fan while simultaneously increasing its intake volume. It effectively enhances the performance of the cooling fan cell, reinforces the fan's backflow prevention capability, and reduces system entry and cooling fan flow loss. The combination of two types of blades increases the system entry airflow of a cooling fan of the same size, overcomes the performance bottleneck of typical centrifugal cooling fans, and improves the cooling fan's heat dissipation capacity.

[0024] When combining two different types of blades, it is necessary to connect the two different types of blades to form the whole. Because the two types of blades are positioned at different locations on the inner and outer rings, this creates many unstable elements when the two types of blades are connected to form the whole. Furthermore, this affects the stability of the cooling fan's operation process. As can be understood, during the operation of the cooling fan, the blades, due to insufficient connection stability, generate noise and vibrate, affecting the cooling capacity of the cooling fan.

[0025] To ensure stability in the operating process of a cooling fan, several embodiments of this application provide cooling fans that can be used in electronic devices such as laptop computers and personal computers. The fan rotor of the cooling fan has different types of blades arranged at different positions on the inner and outer rings. The blades located on the inner ring can be directly connected to the central axis of the fan rotor. The blades located on the outer ring can be connected via retaining rings, and these retaining rings are placed at both ends of the blades located on the outer ring to increase the connection area of ​​the blades. Retaining rings approaching the inner ring are connected to the central axis and / or the blades located on the inner ring, thereby connecting the two types of blades to form a whole. The arrangement of multiple retaining rings can improve the stability of the interconnection of the outer ring blades and the stability of the connection with the inner ring blades, thereby ensuring stability in the operating process of the cooling fan.

[0026] In the following, the fan rotor in a heat dissipation fan according to several embodiments of this application will be described by referring to Figures 1 through 8.

[0027] As shown in Figures 1 to 4, fan rotors according to some embodiments of the present application include a central axis 11, a plurality of first blades 12, a plurality of second blades 13, a first fixing ring 14, and a second fixing ring 15. The plurality of first blades 12 are mounted around the central axis 11, and the first ends of the plurality of first blades 12 are connected to the central axis 11. The plurality of second blades 13 are mounted around the central axis 11, and the plurality of second blades 13 are located on the outer circumference of the plurality of first blades 12. The first fixing ring 14 is used to fix the first ends of the plurality of second blades 13, and the first fixing ring 14 is mounted around the central axis 11. The second fixing ring 15 is used to fix the second ends of the plurality of second blades 13, and the second fixing ring 15 is mounted around the first fixing ring 14.

[0028] The central axis 11 is the part of the fan rotor that secures the blades, and may be called the blade disc or hub of the blades, or it forms the motor case. The fan rotor works in cooperation with the fan stator and rotates relative to the fan stator when driven by the motor. In the process of rotating with the central axis 11, the blades disturb the surrounding air, form an airflow, and promote heat exchange of the gas.

[0029] The first blade 12 is positioned on the outer circumference of the central axis 11 and can be directly connected to the central axis 11 and fixed around the central axis 11. The first blade 12 is a blade that performs a first-order sweeping action.

[0030] The second blade 13 is installed as an extension of the outer circumference of the first blade 12. The second blade 13 is a blade that performs a second type of sweep action. One of the second blade 13 and the first blade 12 is a blade used in a centrifugal fan (centrifugal blade), and the other is a blade used in an axial fan (axial flow blade). In order to fully utilize the performance of the two types of blades, the blade used in the axial fan can be placed on the inner ring and the blade used in the centrifugal fan can be placed on the outer ring. The blade used in the axial fan has an air intake capacity and can increase the amount of intake air. In practice, the axial flow blade has the axial air intake characteristics of a rotor blade and flows the gas along the axial direction of the central axis 11. The axial air intake capacity of the blade can effectively increase the amount of air entering the heat dissipation fan. Furthermore, both the first blade 12 and the second blade 13 can extend along a curve when extending from the base to the end, thereby fully extending the blades and improving airflow and air pressure.

[0031] The first fixing ring 14 is installed on the outer circumference of the central axis 11 and can provide a connection base for fixing the second blade 13, thereby maintaining stability throughout the operation process of the second blade 13. This reduces noise during the operation process of the blade and may be called a noise-reducing ring. The first fixing ring 14 may be connected to the second ends of multiple first blades 12, or it may be installed at a distance from the second ends of the first blades 12. As the connection area between the first fixing ring 14 and the inner ring blade increases, the corresponding connection strength between different blades also increases.

[0032] The second fixing ring 15 is installed on the outer circumference of the first fixing ring 14 and can be fixed to the extended end of the second blade 13. It is coupled with the first fixing ring 14 and provides fixing at the base and end of the second blade 13. The second blade 13 may also be connected to the central axis 11, thereby connecting multiple second blades 13 with multiple first blades 12 to form a single whole.

[0033] The number of first fixing rings 14 and second fixing rings 15 may be one or more, and the first fixing ring 14 may form a connection with the central shaft 11 via a newly added extension at the end of the second blade 13, or it may form a connection with the central shaft 11 via a connecting part, or it may form a connection with the central shaft 11 via an independent connecting member.

[0034] In some embodiments of the fan rotor of this application, when arranging the second blade 13 on the outer circumference of the first blade 12, fixing rings can be installed at both ends of the second blade 13. That is, multiple second blades 13 are connected at the root position via the first fixing ring 14, and multiple second blades 13 are connected at the end position via the second fixing ring 15. The first blade 12 is directly connected to the outer circumference of the central axis 11. By arranging the fixing rings at both ends of the blades located on the outer ring, the connection area of ​​the blades is increased. The two types of blades are then connected to form a whole. The arrangement of multiple fixing rings improves the stability of the interconnection of the outer ring blades and the stability of the connection with the inner ring blades, thereby ensuring stability in the operation process of the heat dissipation fan.

[0035] As shown in Figures 4 to 6, an extension portion 131 may be installed on the first end of some of the multiple second blades 13, and the extension portion 131 is connected to the central axis 11 by passing through the space between two adjacent first blades 12.

[0036] When the first fixing ring 14 is not directly connected to the central shaft 11, or when relying solely on the connection between the first fixing ring 14 and the first blade 12 is insufficient to ensure the overall connection strength formed by the two types of blades, the first end of a portion of the second blade 13 can be extended to adhere to the central shaft 11, thereby forming a direct connection with the central shaft 11. In this way, the first fixing ring 14 can achieve a connection with the central shaft 11 via the extended portion 131.

[0037] By increasing the connection area between the second blade 13 and the central axis 11, the overall connection strength formed by the two types of blades can be improved, ensuring stability during the blade operation process.

[0038] In some embodiments, the extensions 131 located at the same intervals can be integrally connected to one another.

[0039] As shown in Figures 5 and 6, the first end of the second blade 13 is connected to the central axis 11 via the extension portion 131, and at the same time, each extension portion 131 located at the same interval can be integrally connected to one another. In this way, the connection area of ​​each extension portion 131 can be increased, and the connection strength with the whole formed by the central axis 11 can be improved.

[0040] Furthermore, as shown in Figures 7 and 8, a reinforcing portion 132 may be installed between two adjacent extensions 131 connected to the central axis 11, and the reinforcing portion 132 is installed extending from the surface of the first fixing ring 14 toward the central axis 11.

[0041] The reinforcing portion 132 is formed on the first fixing ring 14, connected to the central axis 11, and integrally connects two adjacent extension portions 131 that are independent of each other. This not only improves the connection strength between the first fixing ring 14 and a portion of the second blade 13, but also improves the overall connection strength formed by the portion of the second blade 13.

[0042] In some embodiments, the first retaining ring 14 may be connected to edge positions located in the axial direction of the central axis 11 of the plurality of second blades 13, and / or the second retaining ring 15 may be connected to edge positions located in the axial direction of the central axis 11 of the plurality of second blades 13.

[0043] In other words, the fixing ring can be formed at an edge position located in the axial direction of the central axis 11 of the second blade 13. By placing the connection area at the edge position, the connection between the fixing ring and the second blade 13 can be easily realized. This is advantageous in simplifying the fitting structure when connecting the fixing ring and the second blade 13. In practice, the fixing ring can be bonded onto multiple second blades 13.

[0044] In some embodiments, the first retaining ring 14 may be connected to a mid-position located in the axial direction of the central axis 11 of a plurality of first blades 12, and / or the second retaining ring 15 may be connected to a mid-position located in the axial direction of the central axis 11 of a plurality of second blades 13.

[0045] In other words, the retaining ring can be formed in a central position located in the axial direction of the central axis 11 of the second blade 13, and the retaining ring is at a certain distance from the edge located in the axial direction of the central axis 11 of the second blade 13. In practice, part or all of the radial direction of the central axis 11 of the retaining ring can be engaged with multiple second blades 13.

[0046] In practice, as shown in Figure 1, the first fixing ring 14 and the second fixing ring 15 may both be bonded to the surfaces of multiple second blades 13. Alternatively, when connecting different fixing rings to multiple second blades 13, they may be connected in different ways. That is, one of the first fixing ring 14 and the second fixing ring 15 may be molded onto the surface of multiple second blades 13, and the other may be engaged with the multiple second blades 13. As shown in Figure 2, the first fixing ring 14 may be engaged with multiple second blades 13, and the second fixing ring 15 may be molded onto the surface of multiple second blades 13. Alternatively, both the first fixing ring 14 and the second fixing ring 15 may be engaged with multiple second blades 13.

[0047] In some embodiments, the plurality of first blades 12 may be axial blades, and the plurality of second blades 13 may be centrifugal blades.

[0048] By arranging axial flow blades 200, as used in the axial flow fan 100 shown in Figure 9, on the inner ring and centrifugal blades 400, as used in the centrifugal fan 300 shown in Figure 10, on the outer ring, the performance of both types of blades can be fully utilized. The axial flow blades 200 used in the axial flow fan 100 have suction capacity and can increase the intake volume. In the rotation process, the axial flow blades 200 direct the airflow along the axial direction shown by arrow M in Figure 9. The axial flow blades 200 have a shape that is inclined forward or backward, and have a relatively large blade area in the axial direction, generating an airflow that flows along the axial direction when rotating. The number of axial flow blades 200 is generally relatively small, and the area occupied by a single axial flow blade 200 when arranged is relatively large. The centrifugal fan 300 can be arranged with a relatively large number of centrifugal blades 400, and the radial area of ​​the centrifugal blades 400 is relatively large, generating an airflow that flows along the radial direction shown by arrow N in Figure 10 when rotating. Centrifugal blades can perform a relatively good sweeping action on the outer circumference.

[0049] It should be explained that the embodiments of this application will be described using the example that the first blade 12 may be an axial flow blade and the second blade 13 may be a centrifugal blade. These multiple first blades 12 may be centrifugal blades and the multiple second blades 13 may be axial flow blades, and this application is not limited to these.

[0050] In some embodiments, the multiple first blades 12 may be installed at an angle, or the multiple first blades 12 may be installed in a curved manner.

[0051] The inclined or curved installation of the first blade 12 facilitates axial air intake of the cooling fan. When the first blade 12 is inclined or curved relative to the second blade 13, it can form air intake characteristics similar to those of a rotor blade, improving the intake volume by creating a pressure difference on both sides of the central axis 11.

[0052] In practice, the use of inclined blades can facilitate manufacturing and shaping, while the use of curved blades can enhance air intake capacity. The inclined blade can be a straight-plate type, meaning it is entirely flat and positioned at an angle to the second blade 13. The curved blade may be a curved blade with a larger end and a smaller base, or a curved blade with a smaller end and a larger base. Furthermore, different degrees of curvature can be designed to adjust the air intake capacity of the first blade 12.

[0053] As can be further explained, the embodiments of this application do not limit the shape or number of axial flow blades, and any fan blade capable of realizing the basic functions of an axial flow fan blade falls within the scope of protection of this application. Similarly, the embodiments of this application do not limit the shape or number of centrifugal blades, and any fan blade capable of realizing the basic functions of a centrifugal fan blade falls within the scope of protection of this application.

[0054] In some embodiments, the surface of the first blade 12 does not need to protrude more than the surface of the second blade 13 in the axial direction of the central axis 11.

[0055] In other words, after the fan rotor is formed, the surface of the first blade 12 is aligned with the surface of the second blade 13, or the surface of the first blade 12 located in the axial direction of the central axis 11 is lower than the surface of the second blade 13. This allows the first blade 12 to occupy relatively little space, which is advantageous for achieving overall miniaturization of the cooling fan.

[0056] In practice, the multiple second blades 13 may be distributed on a different plane from the multiple first blades 12, and at least a portion of each first blade 12 may protrude beyond the edge of the second blade 13 in the axial direction of the central axis 11.

[0057] The first blade 12 is positioned at the intake port of the fan rotor and may be distributed on a different plane from the second blade 13, extending beyond the edge of the second blade 13 on one side of the intake port. This increases the working area of ​​the first blade 14, forming an axial airflow over a relatively large area and increasing the intake volume of the fan rotor.

[0058] Furthermore, the multiple first blades 12 may be uniformly distributed around the outer circumference of the central axis 11, and / or the multiple second blades 13 may be uniformly distributed around the outer circumference of the central axis 11.

[0059] When the first blade 12 and the second blade 13 are uniformly arranged, they can perform a uniform drainage action around the outer circumference of the central axis 11, and the blades receive relatively uniform force, thereby making the operation process of the fan rotor more stable.

[0060] In some embodiments, the multiple first blades 12, the multiple second blades 13, the first retaining ring 14, and the second retaining ring 15 may be integrally molded with the central shaft 11.

[0061] By adopting an integrally molded structure, the connection strength between structures can be effectively improved. The first blade 12 and the second blade 13 belong to blades of different shapes and sizes, and differences in the manufacturing process can easily cause connection failures in the blades. By combining the first blade 12 and the second blade 13 using an integral molding method, the connection strength of each blade after combination can be ensured. In addition, the fixing ring 12 may be integrally molded with the central shaft 11 and each blade.

[0062] Some embodiments of this application further provide a cooling fan, the cooling fan comprising a case, a fan stator, and the fan rotor described above. The fan stator is installed within the case, and the fan rotor is rotatably connected to the fan stator.

[0063] By employing composite blades, the cooling fan combines the advantages of both centrifugal blades and rotor blades similar to axial blades. The characteristics of the intake blades significantly increase the airflow and air pressure of the cooling fan. Furthermore, by optimizing the cooling fan's airflow path, a small portion of the airflow can be drained and dissipated to specific heat source areas, improving the overall cooling capacity and performance of the system.

[0064] Furthermore, the blades located on the outer ring can be connected via retaining rings, and these retaining rings are positioned at both ends of the outer ring blades to increase the blade connection area. Retaining rings approaching the inner ring are connected to the central axis and / or the inner ring blades, thereby connecting the two types of blades to form the whole. The arrangement of multiple retaining rings improves the stability of the interconnection of the outer ring blades and the stability of the connection with the inner ring blades, thereby ensuring stability in the operation process of the cooling fan.

[0065] Some embodiments of this application further provide electronic devices, the electronic devices including the above-mentioned cooling fan.

[0066] Electronic devices with relatively large heat-generating components can utilize the above-mentioned cooling fans. Based on the characteristics of each different type of blade, the intake volume at the cooling fan's intake can be increased, effectively increasing the airflow and air pressure at the exhaust port. This solves the problem of insufficient airflow in electronic devices such as ultra-thin laptops. Furthermore, by adopting a multi-fixing system, stability in the cooling fan's operation process can be ensured, thereby ensuring the cooling fan's heat dissipation capacity.

[0067] As those skilled in the art will understand, each of the embodiments described above is a specific example of realizing the present application, and in actual applications, various modifications can be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. It is a fan rotor, The central axis and A plurality of first blades are installed around the aforementioned central axis, with their first ends connected to the aforementioned central axis, A plurality of second blades are arranged around the central axis and located on the outer circumference of the plurality of first blades, A first fixing ring used to secure the first ends of the plurality of second blades, which is installed around the central axis, A fan rotor characterized by including a second fixing ring used to fix the second ends of the plurality of second blades, and which is installed around the first fixing ring.

2. The fan rotor according to claim 1, characterized in that an extension is provided at the first end of some of the plurality of second blades, and the extension is connected to the central axis by passing through the space between two adjacent first blades.

3. The fan rotor according to claim 2, characterized in that the extensions located at the same interval are integrally connected to one another.

4. The fan rotor according to claim 2, characterized in that a reinforcing portion is installed between two adjacent extension portions connected to the central axis, and the reinforcing portion is installed extending from the surface of the first fixing ring toward the central axis.

5. The fan rotor according to claim 1, characterized in that the first fixing ring is connected to edge positions located in the axial direction of the central axis of a plurality of second blades, and / or the second fixing ring is connected to edge positions located in the axial direction of the central axis of a plurality of second blades.

6. The fan rotor according to claim 1, characterized in that the first fixing ring is connected to a middle position located in the axial direction of the central axis of a plurality of second blades, and / or the second fixing ring is connected to a middle position located in the axial direction of the central axis of a plurality of second blades.

7. The fan rotor according to any one of claims 1 to 6, characterized in that the plurality of first blades are axial flow blades and the plurality of second blades are centrifugal blades.

8. The fan rotor according to claim 1, characterized in that, in the axial direction of the central axis, the surface of the first blade does not protrude more than the surface of the second blade.

9. It is a cooling fan, The case and, A fan stator installed inside the aforementioned case, A heat dissipation fan characterized by including a fan rotor according to any one of claims 1 to 8, which is rotatably connected to the fan stator.

10. An electronic device, characterized by including a heat dissipation fan as described in claim 9.

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