Fan rotor, cooling fan and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of heat dissipation of electronic equipment, and discloses a fan rotor, a heat dissipation fan and electronic equipment. The fan rotor comprises a central shaft, a plurality of first blades, a plurality of second blades, a first fixing ring and a second fixing ring. The multiple first blades are arranged around the center shaft, and the first ends of the multiple first blades are connected with the center shaft. The multiple second blades are arranged around the center shaft and located on the peripheries of the multiple first blades. The first fixing ring is used for fixing the first ends of the multiple second blades, and the first fixing ring is arranged around the center shaft. The second fixing ring is used for fixing the second ends of the multiple second blades, and the second fixing ring is arranged around the first fixing ring. According to the fan rotor, the cooling fan and the electronic equipment provided by the embodiment of the invention, the stability of the cooling fan in the operation process can be ensured.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heat dissipation of electronic equipment, and in particular to a fan rotor, a heat dissipation fan and electronic equipment. Background Art

[0002] As electronic devices continue to develop towards miniaturization, the problem of heat accumulation in electronic devices is becoming more and more serious. During the operation of electronic devices, the continuous accumulation of heat will affect the normal operation of some components, which is not conducive to the electronic devices to achieve better performance. Therefore, it is necessary to adopt a certain heat dissipation form to dissipate the heat of the heat-generating components in electronic devices.

[0003] At present, air cooling is still a widely used form of heat dissipation. Air cooling uses a cooling fan to dissipate heat. During operation, the cooling fan can increase the air circulation rate and transfer the heat in a specific area to the outside in a timely manner. The stability of the cooling fan during operation will affect the cooling capacity of the cooling fan. Therefore, how to ensure the stability of the cooling fan during operation is an important issue. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a fan rotor, a heat dissipation fan and an electronic device, which can ensure the stability of the heat dissipation fan during operation.

[0005] To solve the above technical problems, an embodiment of the present application provides a fan rotor. The fan rotor includes a central axis, a plurality of first blades, a plurality of second blades, a first fixing ring and a second fixing ring. The plurality of first blades are arranged 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 arranged around the central axis, and the plurality of second blades are located at the periphery of the plurality of first blades. The first fixing ring is used to fix the first ends of the plurality of second blades, and the first fixing ring is arranged around the central axis. The second fixing ring is used to fix the second ends of the plurality of second blades, and the second fixing ring is arranged around the first fixing ring.

[0006] The embodiment of the present application further provides a heat dissipation fan, which includes a housing, a fan stator and the above-mentioned fan rotor. The fan stator is arranged in the housing, and the fan rotor is rotatably connected to the fan stator.

[0007] An embodiment of the present application further provides an electronic device, which includes the above-mentioned heat dissipation fan.

[0008] In the fan rotor, cooling fan and electronic device provided by the embodiments of the present application, when the second blades are arranged on the periphery of the first blades, fixing rings can be respectively provided at both ends of the second blades, that is, a plurality of second blades are connected at the root position by the first fixing ring, and a plurality of second blades are connected at the end position by the second fixing ring. The first blade is directly connected to the periphery of the central axis. By arranging the fixing rings at both ends of the blades located in the outer ring, the connection area of ​​the blades is increased. And the two blades are connected to form a whole. By arranging multiple fixing rings, the stability of the outer ring blades connected to each other and the stability of the connection with the inner ring blades can be improved, thereby ensuring the stability of the cooling fan during operation.

[0009] In some embodiments, the first ends of some of the plurality of second blades are provided with an extension portion, which passes through the interval between two adjacent first blades and is connected to the central axis. In this way, the first ends of some of the second blades are connected to the central axis through the extension portion, which can improve the stability of the two blades when connected to form a whole.

[0010] In some embodiments, the extensions at the same interval are connected to each other. Thus, by connecting the extensions at the same interval to each other, a connection relationship can be established between the extensions, which is beneficial to improving the connection stability between the extensions and the central axis.

[0011] In some embodiments, a reinforcing portion is provided between two adjacent extensions connected to the central axis, and the reinforcing portion extends from the surface of the first fixing ring toward the central axis. In this way, the connection strength between the two adjacent extensions can be improved by providing the reinforcing portion between the two adjacent extensions.

[0012] In some embodiments, the first fixing ring is connected to the edge positions of the plurality of second blades in the axial direction of the central axis, and / or the second fixing ring is connected to the edge positions of the plurality of second blades in the axial direction of the central axis. In this way, by connecting the fixing ring to the edge positions of the second blades, the connection structure of the two can be simplified, and the connection between the two can be easily achieved.

[0013] In some embodiments, the first fixing ring is connected to the middle position of the plurality of second blades in the axial direction of the central axis, and / or the second fixing ring is connected to the middle position of the plurality of second blades in the axial direction of the central axis. In this way, by connecting the fixing ring to the middle position of the second blade, the connection area between the two can be increased and the connection strength between the two can be improved.

[0014] In some embodiments, the plurality of first blades are axial flow blades, and the plurality of second blades are centrifugal blades. Thus, while the outer ring centrifugal blades form a radial gas flow, the inner ring axial flow blades can form an axial gas flow, thereby increasing the air intake.

[0015] In some embodiments, the surface of the first blade does not protrude from the surface of the second blade in the axial direction of the central axis. In this way, by making the surface of the first blade not protrude from the surface of the second blade, it is helpful to avoid the first blade from occupying more space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of a fan rotor in a heat dissipation fan provided in some embodiments of the present application;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of a fan rotor in a heat dissipation fan provided in other embodiments of the present application;

[0019] Figure 3 is a schematic diagram of a top view of a fan rotor in a heat dissipation fan provided in some other embodiments of the present application;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of a fan rotor in a heat dissipation fan provided in some other embodiments of the present application;

[0021] Figure 5 is a schematic diagram of the three-dimensional structure of a fan rotor in a heat dissipation fan provided in some other embodiments of the present application;

[0022] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 7 is a schematic diagram of the three-dimensional structure of a fan rotor in a heat dissipation fan provided in some other embodiments of the present application;

[0024] Figure 8 yes Figure 7 A schematic diagram of the enlarged structure at B in the middle;

[0025] Fig. 9 It is a three-dimensional structural schematic diagram of an axial flow fan in the prior art;

[0026] Fig.10It is a schematic diagram of the three-dimensional structure of a centrifugal fan in the prior art. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] As electronic devices continue to become smaller, the demand for heat dissipation is also increasing. For example, computers, notebooks and other devices have designed many different heat dissipation forms such as air cooling and liquid cooling for devices with high heat generation. In air cooling, heat dissipation fans are mainly used to dissipate heat from heat-generating components. The fan rotor of the heat dissipation fan can increase the air circulation rate during rotation, thereby improving the heat exchange efficiency in the air. During the operation of the heat dissipation fan, the heat generated by the heat-generating components in the electronic equipment during operation can be continuously transferred to the surrounding air, thereby completing the heat dissipation.

[0031] At present, the cooling fans used in electronic devices include centrifugal fans and axial flow fans. The blades of the centrifugal fan can generate airflow flowing in the radial direction of the central axis of the fan rotor, and the blades of the axial flow fan can generate airflow flowing in the axial direction of the central axis of the fan rotor. The two types of cooling fans have their own different characteristics. By combining the blades of the two types of cooling fans in the fan rotor, the air intake and wind pressure of the cooling fan can be increased when cooling a specific area, thereby improving the cooling capacity of the cooling fan.

[0032] In actual situations, the compound blades with rotor characteristics can increase the flow rate and wind pressure of the cooling fan. The fan rotor of the cooling fan can be equipped with blades with rotor characteristics on the basis of centrifugal blades. The air intake of the cooling fan can be increased while ensuring the wind sweeping ability of the cooling fan. It can effectively improve the performance of the cooling fan unit, enhance the anti-return flow ability of the cooling fan, and reduce the flow loss of the system and the cooling fan. The combination of the two types of blades can increase the flow rate of the cooling fan into the system under the same size, break the performance bottleneck of conventional centrifugal cooling fans, and improve the heat dissipation capacity of the cooling fan.

[0033] When two different types of blades are combined, they need to be connected to form a whole. However, since the two blades are arranged at different positions on the inner and outer circles, the instability factors increase when the two blades are connected to form a whole. This in turn affects the stability of the cooling fan during operation. It is understandable that during the operation of the cooling fan, the blades will generate noise and sway during operation due to insufficient connection stability, thus affecting the cooling capacity of the cooling fan.

[0034] In order to ensure the stability of the cooling fan during operation, some embodiments of the present application provide a cooling fan that can be applied to electronic devices such as notebooks and personal computers (Personal Computers). The fan rotor of the cooling fan is arranged with different types of blades at different positions of the inner and outer rings, and the blades located in the inner ring can be directly connected to the central axis of the fan rotor. The blades located in the outer ring can be connected through a fixing ring, and the fixing rings are arranged at both ends of the blades located in the outer ring to increase the connection area of ​​the blades. And the fixing ring close to the inner ring is connected to the central axis and / or the blades located in the inner ring, so that the two blades are connected to form a whole. Through the arrangement of multiple fixing rings, the stability of the outer ring blades connected to each other and the stability of the connection with the inner ring blades can be improved, thereby ensuring the stability of the cooling fan during operation.

[0035] Combine the following Figures 1 to 8 The fan rotor in the heat dissipation fan provided in some embodiments of the present application is described.

[0036] like Figures 1 to 4As shown, the fan rotor provided by some embodiments of the present application includes 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 arranged 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 arranged around the central axis 11, and the plurality of second blades 13 are located at the periphery 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 arranged 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 arranged around the first fixing ring 14.

[0037] The central shaft 11 is the part of the fan rotor used to fix the blades, which can also be called the blade disk or hub, or form a motor housing. The fan rotor cooperates with the fan stator and rotates relative to the fan stator under the drive of the motor. When the blades rotate with the central shaft 11, they disturb the surrounding air, form airflow, and promote gas heat exchange.

[0038] The first blade 12 is arranged at the periphery of the central shaft 11, and can be directly connected to the central shaft 11 and fixed around the central shaft 11. The first blade 12 is a blade that plays a first type of wind sweeping role.

[0039] The second blade 13 is extended and arranged outside the first blade 12. The second blade 13 is a blade that plays a second type of wind sweeping role. One of the second blade 13 and the first blade 12 is a blade (centrifugal blade) used in a centrifugal fan, and the other is a blade (axial blade) used in an axial flow fan. In order to give full play to the performance of the two types of blades, the blades used in the axial flow fan can be arranged in the inner circle, and the blades used in the centrifugal fan can be arranged in the outer circle. The blades used in the axial flow fan have the ability to absorb wind and can increase the amount of air entering. In actual situations, the axial flow blade has the axial wind suction feature of the rotor blade, so that the gas flows in the axial direction of the central axis 11. The axial wind suction capacity of the blade 14 can effectively increase the amount of air entering the cooling fan. In addition, when the first blade 12 and the second blade 13 extend from the root to the end, they can be extended along a curve so that the blades are fully extended to increase the air volume and wind pressure.

[0040] The first fixing ring 14 is arranged on the periphery of the central shaft 11, and can provide a connection basis for fixing the second blade 13, so that the second blade 13 as a whole remains stable during operation. Thereby reducing the noise during the operation of the blade, it can also be called a mute ring. The first fixing ring 14 can be connected to the second ends of multiple first blades 12, or can be spaced apart from the second ends of the first blades 12. When the connection area between the first fixing ring 14 and the inner ring blades increases, the corresponding connection strength between different blades will also increase.

[0041] The second fixing ring 15 is arranged on the periphery of the first fixing ring 14 and can be fixed at the extended end of the second blade 13. It is combined with the first fixing ring 14 and plays a fixing role at the root and end of the second blade 13. The second blade 13 can also be connected to the central shaft 11, so that multiple second blades 13 are connected to multiple first blades 12 to form a whole.

[0042] The number of the first fixing ring 14 and the second fixing ring 15 can be one or more. The first fixing ring 14 can be connected to the central axis 11 through a newly added extension portion at the end of the second blade 13, can be connected to the central axis 11 through a connecting portion, or can be connected to the central axis 11 through an independent connecting piece.

[0043] In the fan rotor provided by some embodiments of the present application, when the second blades 13 are arranged on the periphery of the first blades 12, fixing rings can be respectively provided at both ends of the second blades 13. That is, a plurality of second blades 13 are connected at the root position by a first fixing ring 14, and a plurality of second blades 13 are connected at the end position by a second fixing ring 15. The first blade 12 is directly connected to the periphery of the central axis 11. By arranging the fixing rings at both ends of the blades located in the outer ring, the connection area of ​​the blades is increased. And the two blades are connected to form a whole. By arranging a plurality of fixing rings, the stability of the outer ring blades connected to each other and the stability of the connection with the inner ring blades can be improved, thereby ensuring the stability of the cooling fan during operation.

[0044] like Figures 4 to 6 As shown, a first end of some of the plurality of second blades 13 may be provided with an extension portion 131 , and the extension portion 131 passes through a gap between two adjacent first blades 12 and is connected to the central shaft 11 .

[0045] When the first fixing ring 14 is not directly connected to the central shaft 11, or when the connection between the first fixing ring 14 and the first blades 12 is insufficient to ensure the overall connection strength of the two types of blades, the first ends of some second blades 13 can be extended close to the central shaft 11 and directly connected to the central shaft 11. Thus, the first fixing ring 14 can be connected to the central shaft 11 via the extension portion 131.

[0046] By increasing the connection area between the second blade 13 and the central shaft 11, the overall connection strength formed by the two types of blades can be improved, thereby ensuring the stability of the blades during operation.

[0047] In some embodiments, the extension portions 131 located at the same interval may be connected to each other.

[0048] like Figure 5 and Figure 6As shown, while the first end of the second blade 13 is connected to the central shaft 11 through the extension 131, the extensions 131 located at the same interval can also be connected to each other. In this way, the connection area of ​​each extension 131 can be increased, and the overall connection strength formed with the central shaft 11 can be improved.

[0049] In addition, if Figure 7 and Figure 8 As shown, a reinforcement portion 132 may be disposed between two adjacent extension portions 131 connected to the central axis 11 , and the reinforcement portion 132 extends from the surface of the first fixing ring 14 toward the central axis 11 .

[0050] The reinforcement part 132 is formed on the first fixing ring 14 and connects two adjacent extension parts 131 connected to the central axis 11 and independent of each other, thereby improving the connection strength between the first fixing ring 14 and the part of the second blade 13, and also improving the connection strength of the whole formed by the part of the second blade 13.

[0051] In some embodiments, the first fixing ring 14 may be connected to the edge of the plurality of second blades 13 in the axial direction of the central axis 11 , and / or the second fixing ring 15 may be connected to the edge of the plurality of second blades 13 in the axial direction of the central axis 11 .

[0052] That is, the fixing ring can be formed at the edge of the second blade 13 in the axial direction of the central axis 11. By setting the connection area at the edge, it is easy to achieve the connection between the fixing ring and the second blade 13. It is helpful to simplify the matching structure when the fixing ring is connected to the second blade 13. In actual situations, the fixing ring can be attached to multiple second blades 13.

[0053] In some embodiments, the first fixing ring 14 may be connected to the plurality of first blades 12 at a middle position in the axial direction of the central axis 11 , and / or the second fixing ring 15 may be connected to the plurality of second blades 13 at a middle position in the axial direction of the central axis 11 .

[0054] That is, the fixing ring can be formed at the middle position of the second blade 13 in the axial direction of the central axis 11, and the fixing ring is at a certain distance from the edge of the second blade 13 in the axial direction of the central axis 11. In actual situations, the fixing ring can be partially or completely clamped in the radial direction of the central axis 11.

[0055] In actual situations, Figure 1As shown, both the first fixing ring 14 and the second fixing ring 15 can be attached to the surface of the plurality of second blades 13. Alternatively, different fixing rings can be connected to the plurality of second blades 13 in different forms. That is, one of the first fixing ring 14 and the second fixing ring 15 can be formed on the surface of the plurality of second blades 13, and the other can be inserted into the plurality of second blades 13. Figure 2 As shown, the first fixing ring 14 can be clamped into the plurality of second blades 13, and the second fixing ring 15 can be formed on the surface of the plurality of second blades 13. Alternatively, the first fixing ring 14 and the second fixing ring 15 can both be clamped into the plurality of second blades 13.

[0056] In some embodiments, the plurality of first blades 12 may be axial flow blades, and the plurality of second blades 13 may be centrifugal blades.

[0057] Arrange in inner circle Fig. 9 The axial flow blades 200 used in the axial flow fan 100 are arranged on the outer ring. Fig.10 The centrifugal blades 400 used in the centrifugal fan 300 shown in the figure can give full play to the performance of the two types of blades. The axial flow blades 200 used in the axial flow fan 100 have the ability to absorb air and can increase the amount of air entering. During the rotation process, the axial flow blades 200 make the air flow along Fig. 9 The axial flow blades 200 have a forward or backward tilted shape, and the blades have a larger effective area in the axial direction, and generate airflow in the axial direction when rotating. The number of axial flow blades 200 is usually small, and a single axial flow blade 200 occupies a large area when arranged. The centrifugal fan 300 can be arranged with a large number of centrifugal blades 400, and the centrifugal blades 400 have a larger effective area in the radial direction, and generate airflow in the axial direction when rotating. Fig.10 The airflow flows in the radial direction as shown by the arrow N. The centrifugal blades can play a good role in sweeping the wind at the periphery.

[0058] It should be noted that the embodiment of the present application is described by taking the first blade 12 as an axial flow blade and the second blade 13 as a centrifugal blade as an example. The multiple first blades 12 may also be centrifugal blades, and the multiple second blades 13 may be axial flow blades, which is not limited in the present application.

[0059] In some embodiments, the plurality of first blades 12 may be arranged to be inclined, or the plurality of first blades 12 may be arranged to be bent.

[0060] The tilted setting of the first blade 12 or the curved setting of the first blade 12 can facilitate the axial air suction of the cooling fan. When the first blade 12 is tilted or curved relative to the second blade 13, a suction characteristic similar to that of a rotor blade can be formed, so that a pressure difference is formed on both sides of the central axis 11, thereby increasing the air intake.

[0061] In actual situations, the use of inclined blades can facilitate the production and molding, while the use of curved blades can enhance the air suction capacity. The inclined blades can be straight plate blades, that is, the whole is flat and the whole is inclined relative to the second blade 13. The curved blades can be curved blades with a large end and a small root, or curved blades with a small end and a large root. In addition, in order to adjust the air suction capacity of the first blade 12, different degrees of curvature can be designed.

[0062] It can also be explained that the embodiments of the present application do not limit the shape and number of axial flow blades, as long as the blades can achieve the basic functions of axial flow blades, they are within the protection scope of the present application. Similarly, the embodiments of the present application do not limit the shape and number of centrifugal blades, as long as the blades can achieve the basic functions of centrifugal blades, they are within the protection scope of the present application.

[0063] In some embodiments, in the axial direction of the central axis 11 , the surface of the first blade 12 may not protrude beyond the surface of the second blade 13 .

[0064] That is, after the fan rotor is formed, the surface of the first blade 12 is flush with the surface of the second blade 13, or the surface of the first blade 12 in the axial direction of the central axis 11 is lower than the surface of the second blade 13. Thus, the first blade 12 does not occupy much space, which is conducive to the overall miniaturization of the heat dissipation fan.

[0065] In actual situations, the plurality of second blades 13 and the plurality of first blades 12 may be distributed on different planes. In the axial direction of the central axis 11 , at least a portion of each first blade 12 may protrude from the edge of the second blade 13 .

[0066] The first blade 12 is arranged at the air inlet of the fan rotor, and can be distributed on different planes with the second blade 13, and on one side of the air inlet, it exceeds the edge of the second blade 13. Thus, the effective area of ​​the first blade 14 is increased, and axial air flow is formed in a larger area, so as to increase the air intake of the fan rotor.

[0067] In addition, the plurality of first blades 12 may be evenly distributed around the central axis 11 , and / or the plurality of second blades 13 may be evenly distributed around the central axis 11 .

[0068] When the first blades 12 and the second blades 13 are evenly arranged, they can evenly disturb the periphery of the central axis 11, and the force on the blades is more even, so that the operation process of the fan rotor is more stable.

[0069] In some embodiments, the plurality of first blades 12 , the plurality of second blades 13 , the first fixing ring 14 , and the second fixing ring 15 may be integrally formed with the central shaft 11 .

[0070] The use of an integrated structure can effectively improve the connection strength between structures. The first blade 12 and the second blade 13 are blades of different shapes and sizes. During the manufacturing process, the blades are prone to connection failure due to different manufacturing processes. The use of an integrated molding method to composite the first blade 12 and the second blade 13 can ensure the connection strength of each blade after the composite. In addition, the fixing ring 12 can also be integrally formed with the central shaft 11 and each blade.

[0071] Some embodiments of the present application also provide a heat dissipation fan, which includes a housing, a fan stator and the above-mentioned fan rotor. The fan stator is arranged in the housing, and the fan rotor is rotatably connected to the fan stator.

[0072] The cooling fan uses composite blades to combine the characteristics of centrifugal blades and rotor blades similar to axial flow blades. The air volume and air pressure of the cooling fan are significantly improved through the characteristics of the air suction blades. It is also possible to optimize the cooling fan flow path so that a small part of the air flow is diverted to some heat source concentrated areas for heat dissipation, thereby improving the cooling capacity and performance of the overall system.

[0073] In addition, the blades located in the outer ring can be connected by a fixing ring, and the fixing rings are arranged at both ends of the blades located in the outer ring to increase the connection area of ​​the blades. And the fixing ring close to the inner ring is connected to the central axis and / or the blades located in the inner ring, so that the two blades are connected to form a whole. Through the arrangement of multiple fixing rings, the stability of the connection between the outer ring blades and the inner ring blades can be improved, thereby ensuring the stability of the cooling fan during operation.

[0074] Some embodiments of the present application further provide an electronic device, the electronic device comprising the above-mentioned heat dissipation fan.

[0075] Electronic devices can use the above-mentioned cooling fan at components that generate more heat. Based on the characteristics of different types of blades, the air intake at the air inlet of the cooling fan can be increased, and the air volume and air pressure at the air outlet can be effectively increased. This solves the problem of insufficient air volume in electronic devices such as ultra-thin notebooks. In addition, by adopting multiple fixing forms, the stability of the cooling fan during operation can be ensured, thereby ensuring the heat dissipation capacity of the cooling fan.

[0076] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A fan rotor, characterized in that: include: Central axis; A plurality of first blades, wherein the plurality of first blades are arranged around the central axis, and first ends of the plurality of first blades are connected to the central axis; A plurality of second blades, wherein the plurality of second blades are arranged around the central axis and the plurality of second blades are located at the periphery of the plurality of first blades; A first fixing ring, used for fixing the first ends of the plurality of second blades, and the first fixing ring is arranged around the central axis; The second fixing ring is used to fix the second ends of the plurality of second blades, and the second fixing ring is arranged around the first fixing ring.

2. The fan rotor according to claim 1, characterized in that: An extension portion is disposed at a first end of a portion of the plurality of second blades. The extension portion passes through a gap between two adjacent first blades and is connected to the central axis.

3. The fan rotor according to claim 2, characterized in that: The extensions located at the same interval are connected to each other.

4. The fan rotor according to claim 2, characterized in that: A reinforcement portion is disposed between two adjacent extension portions connected to the central axis, and the reinforcement portion is extended 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 of the plurality of second blades in the axial direction of the central axis, and / or the second fixing ring is connected to edge positions of the plurality of second blades in the axial direction of the central axis.

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

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 beyond the surface of the second blade.

9. A cooling fan, characterized in that: include: case; A fan stator is arranged in the housing; The fan rotor according to any one of claims 1 to 8, wherein the fan rotor is rotatably connected to the fan stator.

10. An electronic device, characterized in that: Including the heat dissipation fan as described in claim 9.

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