Fan rotor, cooling fan and electronic device

Abstract

A fan rotor, a cooling fan and an electronic device. The fan rotor comprises a central shaft (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 shaft (11), first ends of the plurality of first blades (12) being connected to the central shaft. The plurality of second blades (13) are arranged around the central shaft (11), the plurality of second blades (13) being arranged on the periphery of the plurality of first blades (12). The first fixing ring (14) is used for fixing first ends of the plurality of second blades (13), and the first fixing ring (14) is arranged around the center shaft (11). The second fixing ring (15) is used for fixing second ends of the plurality of second blades (13), and the second fixing ring (15) is arranged around the first fixing ring (14). By means of the design, the fan rotor can ensure the stability of cooling fans during operation.

Description

Fan rotor, cooling fan and electronic equipment

[0001] This application claims priority to Chinese Patent Application No. 202421116195.1, filed on May 21, 2024, entitled "Fan Rotor, Cooling Fan and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of heat dissipation technology for electronic devices, and in particular to a fan rotor, a cooling fan, and an electronic device. Background Technology

[0003] As electronic devices continue to trend towards miniaturization, the problem of heat accumulation within them is becoming increasingly serious. During operation, the continuous buildup of heat can affect the normal functioning of some components, hindering the device's performance. Therefore, it is necessary to employ appropriate heat dissipation methods to cool the heat-generating components in electronic devices.

[0004] Currently, air cooling remains a widely used form of heat dissipation. Air cooling uses cooling fans to dissipate heat, which increase airflow during operation, transferring heat from specific areas to the outside in a timely manner. The stability of the cooling fan's operation affects its cooling capacity. Therefore, ensuring the stability of the cooling fan during operation is an important issue.

[0005] Summary of the Invention

[0006] The purpose 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 operation.

[0007] To address the aforementioned 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 fixing ring, and a second fixing ring. The plurality of first blades are arranged 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 arranged around the central shaft, and the plurality of second blades are located around 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 shaft. 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.

[0008] An embodiment of this application also provides a cooling fan, which includes a housing, a fan stator, and the aforementioned fan rotor. The fan stator is disposed within the housing, and the fan rotor is rotatably connected to the fan stator.

[0009] The embodiment of the present application further provides an electronic device, which comprises the heat dissipation fan.

[0010] The fan rotor, the heat dissipation fan and the electronic device provided by the embodiment of the present application can be connected as a whole when the second blades are arranged at the periphery of the first blades, i.e., the plurality of second blades are connected by the first fixing ring at the root position, and the plurality of second blades are connected by the second fixing ring at the end position. The first blades are directly connected at the periphery of the central shaft. By arranging the fixing ring at the two ends of the blades at the outer ring, the connection area of the blades is increased. The two kinds of blades are connected as a whole. By arranging the plurality of fixing rings, the stability of the connection between the outer ring blades and the stability of the connection between the inner ring blades can be improved, so as to ensure the stability of the heat dissipation fan during operation.

[0011] In some embodiments, the first end of part of the plurality of second blades is provided with an extension, and the extension passes through the interval between the adjacent two first blades and is connected with the central shaft. In this way, the first end of part of the second blades is connected with the central shaft through the extension, and the stability of the connection of the two kinds of blades as a whole can be improved.

[0012] In some embodiments, the extensions at the same interval are connected with each other. In this way, by connecting the extensions at the same interval with each other, a connection relationship between the extensions can be established, which is conducive to improving the connection stability between the extensions and the central shaft.

[0013] In some embodiments, a reinforcing portion is arranged between the adjacent two extensions connected with the central shaft, and the reinforcing portion is arranged to extend from the surface of the first fixing ring towards the central shaft. In this way, by arranging the reinforcing portion between the adjacent two extensions, the connection strength between the adjacent two extensions can be improved.

[0014] In some embodiments, the first fixing ring is connected with the plurality of second blades at the edge position in the axial direction of the central shaft, and / or the second fixing ring is connected with the plurality of second blades at the edge position in the axial direction of the central shaft. In this way, by connecting the fixing ring with the edge position of the second blades, the connection structure of the two can be simplified, and the connection between the two can be facilitated.

[0015] In some embodiments, the first fixing ring is connected with the plurality of second blades at the middle position in the axial direction of the central shaft, and / or the second fixing ring is connected with the plurality of second blades at the middle position in the axial direction of the central shaft. In this way, by connecting the fixing ring with the middle position of the second blades, the connection area between the two can be increased, and the connection strength between the two can be improved.

[0016] In some embodiments, the first plurality of blades are axial flow blades and the second plurality of blades are centrifugal flow blades. In this way, the axial flow of gas can be formed by the inner ring of axial flow blades while the radial flow of gas is formed by the outer ring of centrifugal flow blades, thereby increasing the air intake.

[0017] In some embodiments, in the axial direction of the central shaft, the surface of the first blade does not protrude from the surface of the second blade. In this way, by making the surface of the first blade not protrude from the surface of the second blade, it is beneficial to avoid the first blade occupying more space. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are included to further provide explanatory aspects of the present embodiments. Unless otherwise noted, like elements in the drawings have like reference designations. The drawings provided are intended to explain aspects of the present embodiments and are not intended to limit the scope of the present embodiments. The drawings in some cases highlight only certain aspects of some embodiments and do not illustrate all possible implementations.

[0019] FIG. 1 is a perspective view of a fan rotor in a cooling fan according to some embodiments of the present disclosure;

[0020] FIG. 2 is a perspective view of a fan rotor in a cooling fan according to some other embodiments of the present disclosure;

[0021] FIG. 3 is a top view of a fan rotor in a cooling fan according to some other embodiments of the present disclosure;

[0022] FIG. 4 is a perspective view of a fan rotor in a cooling fan according to some other embodiments of the present disclosure;

[0023] FIG. 5 is a perspective view of a fan rotor in a cooling fan according to some other embodiments of the present disclosure;

[0024] FIG. 6 is an enlarged view of A in FIG. 5;

[0025] FIG. 7 is a perspective view of a fan rotor in a cooling fan according to some other embodiments of the present disclosure;

[0026] FIG. 8 is an enlarged view of B in FIG. 7;

[0027] FIG. 9 is a perspective view of an axial flow fan according to the prior art;

[0028] FIG. 10 is a perspective view of a centrifugal flow fan according to the prior art. DETAILED DESCRIPTION

[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the various embodiments of the present application will be described in detail below with the accompanying drawings. However, those skilled in the art can understand that, in the various embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and based on various changes and modifications of the following embodiments. The division of the following various embodiments is for the convenience of description, and should not constitute any limitation on the specific embodiments of the present application. The various embodiments can be combined and referenced to each other without contradiction.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the description and the claims of this application and the above description of drawings, the terms "comprising" and "having" and any variations thereof, are intended to cover not exclusively inclusive.

[0031] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] With the continuous miniaturization of electronic devices, the demand for heat dissipation is also increasing. For example, computers, notebooks and other devices are designed with air cooling, liquid cooling and many different heat dissipation forms for high heat generating devices. In air cooling, heat dissipation fans are mainly used to dissipate heat from the heat generating components. The fan rotor of the heat dissipation fan can enhance the air flow 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 device during operation can be continuously conducted to the surrounding air, thereby completing heat dissipation.

[0033] At present, the heat dissipation fan used in electronic equipment includes centrifugal fan and axial fan. The blades of centrifugal fan can generate airflow flowing in the radial direction of the central axis of the fan rotor, and the blades of axial fan can generate airflow flowing in the axial direction of the central axis of the fan rotor. The two types of heat dissipation fans have their own characteristics. By combining the blades of the two types of heat dissipation fans in the fan rotor, the air intake and air pressure of the heat dissipation fan can be improved when dissipating heat in a specific area, thereby improving the heat dissipation capacity of the heat dissipation fan.

[0034] In actual situation, the composite blade with rotor characteristics can improve the flow rate and air pressure of the heat dissipation fan. The fan rotor of the heat dissipation fan can add blades with rotor characteristics on the basis of centrifugal blades. The air intake of the heat dissipation fan can be increased while ensuring the air sweeping capacity of the heat dissipation fan. The performance of the heat dissipation fan monomer can be effectively improved, and the resistance backflow capacity of the heat dissipation fan can be enhanced, and the flow loss of the system and the heat dissipation fan can be reduced. The combination of the two types of blades can improve the flow rate of the heat dissipation fan into the system under the same size, break through the performance bottleneck of the conventional centrifugal heat dissipation fan, and improve the heat dissipation capacity of the heat dissipation fan.

[0035] When the two different types of blades are combined, the two different types of blades need to be connected to form a whole. However, due to the different positions of the two types of blades arranged in the inner and outer rings, the instability factors of the two types of blades when connected to form a whole are increased. Further, the stability of the heat dissipation fan during operation is affected. It can be understood that during the operation of the heat dissipation fan, the blades will produce noise and swing during operation due to the insufficient connection stability, which affects the heat dissipation capacity of the heat dissipation fan.

[0036] In order to ensure the stability of the heat dissipation fan during operation, some embodiments of the present application provide a heat dissipation fan which can be applied to notebook computers, personal computers (Personal Computer, PC) and other electronic equipment. Different types of blades are arranged at different positions of the inner and outer rings of the fan rotor of the heat dissipation fan, and the blades located in the inner ring can be directly connected with the central axis of the fan rotor. The blades located in the outer ring can be connected through the fixing ring, and the fixing ring is 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 with the central axis and / or the blades located in the inner ring, so as to connect the two types of blades to form a whole. Through the arrangement of multiple fixing rings, the stability of the connection between the outer ring blades and each other and the stability of the connection between the outer ring blades and the inner ring blades can be improved, so as to ensure the stability of the heat dissipation fan during operation.

[0037] The fan rotor in the heat dissipation fan provided by some embodiments of the present application will be described below in combination with FIGS. 1-8.

[0038] As shown in FIG. 1 to FIG. 4, the fan rotor provided by some embodiments of the present application comprises a central shaft 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 shaft 11, and the first ends of the plurality of first blades 12 are connected with the central shaft 11. The plurality of second blades 13 are arranged around the central shaft 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 for fixing the first ends of the plurality of second blades 13, and the first fixing ring 14 is arranged around the central shaft 11. The second fixing ring 15 is used for fixing the second ends of the plurality of second blades 13, and the second fixing ring 15 is arranged around the first fixing ring 14.

[0039] The central shaft 11 is a part of the fan rotor for fixing the blades, and can also be referred to as a blade disc or a hub of the blades, or a motor shell. The fan rotor cooperates with a fan stator and rotates relative to the fan stator under the driving of an electric machine. The blades will disturb the surrounding air during the rotation with the central shaft 11, form an air flow, and promote the heat exchange of the gas.

[0040] The first blades 12 are arranged at the periphery of the central shaft 11, can be directly connected with the central shaft 11, and are fixed around the central shaft 11. The first blades 12 are blades for the first type of wind sweeping.

[0041] The second blades 13 are arranged at the periphery of the first blades 12. The second blades 13 are blades for the second type of wind sweeping. One of the second blades 13 and the first blades 12 is a blade (centrifugal blade) used in a centrifugal fan, and the other is a blade (axial blade) used in an axial fan. In order to fully exert the performance of the two types of blades, the blade used in the axial fan can be arranged at the inner ring, and the blade used in the centrifugal fan can be arranged at the outer ring. The blade used in the axial fan has the ability of axial air suction, and can improve the air intake. In actual cases, the axial blade has the axial air suction feature of a rotor blade, so that the gas flows in the axial direction of the central shaft 11. Through the axial air suction ability of the blade 14, the air volume entering the cooling fan can be effectively improved. In addition, the first blades 12 and the second blades 13 can extend along a curve when extending from the root to the tip, so that the blades are fully extended, and the air volume and air pressure are improved.

[0042] The first fixing ring 14 is arranged at the periphery of the central shaft 11, can provide a connection basis for the fixing of the second blades 13, and can make the second blades 13 as a whole stable during the operation. Thus, the noise during the operation of the blades can be reduced, and the first fixing ring 14 can also be referred to as a silent ring. The first fixing ring 14 can be connected with the second ends of the plurality of first blades 12, or can be arranged in a spaced manner with the second ends of the first blades 12. When the connection area between the first fixing ring 14 and the inner ring blades is increased, the corresponding connection strength between different blades can also be increased.

[0043] The second fixing ring 15 is arranged at the periphery of the first fixing ring 14 and can be fixed at the extended end of the second blade 13. In combination with the first fixing ring 14, the second fixing ring 15 can fix the second blade 13 at the root and the end. The second blade 13 can also be connected to the central shaft 11, so as to connect the plurality of second blades 13 and the plurality of first blades 12 to form an integral whole.

[0044] 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 shaft 11 through the extended part added at the end of the second blade 13, connected to the central shaft 11 through the connecting part, or connected to the central shaft 11 through the independent connecting part.

[0045] The fan rotor provided by some embodiments of the present application can be arranged with the second blade 13 at the periphery of the first blade 12, and the fixing ring can be arranged at both ends of the second blade 13. That is, the plurality of second blades 13 are connected at the root position through the first fixing ring 14, and the plurality of second blades 13 are connected at the end position through the second fixing ring 15. The first blade 12 is directly connected to the periphery of the central shaft 11. By arranging the fixing ring at both ends of the outer circle blade, the connection area of the blade is increased. And the two types of blades are connected to form an integral whole. Through the arrangement of the plurality of fixing rings, the stability of the connection between the outer circle blades and the stability of the connection between the inner circle blades can be improved, so as to ensure the stability of the heat dissipation fan during operation.

[0046] As shown in FIGS. 4 to 6, the first end of part of the plurality of second blades 13 can be provided with an extended part 131, which passes through the interval between the adjacent two first blades 12 and is connected to the central shaft 11.

[0047] 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 blade 12 is insufficient to ensure the connection strength of the integral whole formed by the two types of blades, the first end of part of the second blade 13 can be extended to be 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 through the extended part 131.

[0048] By increasing the connection area between the second blade 13 and the central shaft 11, the connection strength of the integral whole formed by the two types of blades can be improved, and the stability of the blade during operation can be ensured.

[0049] In some embodiments, the extended parts 131 at the same interval can be connected to each other.

[0050] As shown in FIGS. 5 and 6, the first ends of the second vanes 13 connected to the central shaft 11 by the extensions 131 can be connected to each other. In this way, the connection area of each extension 131 can be increased, and the connection strength of the whole formed by the central shaft 11 can be improved.

[0051] In addition, as shown in FIGS. 7 and 8, the two adjacent extensions 131 connected to the central shaft 11 can be provided with a reinforcing portion 132 extending from the surface of the first fixing ring 14 towards the central shaft 11.

[0052] The reinforcing portion 132 is formed on the first fixing ring 14 and connects the two adjacent extensions 131 connected to the central shaft 11 and independent of each other. Not only the connection strength between the first fixing ring 14 and the second vanes 13 is improved, but also the connection strength of the whole formed by the second vanes 13 is improved.

[0053] In some embodiments, the first fixing ring 14 can be connected to the second vanes 13 at the edge positions in the axial direction of the central shaft 11, and / or the second fixing ring 15 can be connected to the second vanes 13 at the edge positions in the axial direction of the central shaft 11.

[0054] That is, the fixing ring can be formed at the edge positions of the second vanes 13 in the axial direction of the central shaft 11. By arranging the connection area at the edge positions, the connection between the fixing ring and the second vanes 13 can be facilitated. The cooperation structure when the fixing ring is connected to the second vanes 13 can be simplified. In actual cases, the fixing ring can be fitted on the second vanes 13.

[0055] In some embodiments, the first fixing ring 14 can be connected to the first vanes 12 at the middle positions in the axial direction of the central shaft 11, and / or the second fixing ring 15 can be connected to the second vanes 13 at the middle positions in the axial direction of the central shaft 11.

[0056] That is, the fixing ring can be formed at the middle positions of the second vanes 13 in the axial direction of the central shaft 11, and the fixing ring is away from the edges of the second vanes 13 in the axial direction of the central shaft 11. In actual cases, the fixing ring can be partially or entirely clamped on the second vanes 13 in the radial direction of the central shaft 11.

[0057] In actual cases, as shown in FIG. 1, 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 in different forms when connected with the plurality of second blades 13. That is, one of the first fixing ring 14 and the second fixing ring 15 can be shaped on the surface of the plurality of second blades 13, and the other can be clamped into the plurality of second blades 13. As shown in FIG. 2, the first fixing ring 14 can be clamped into the plurality of second blades 13, and the second fixing ring 15 can be shaped on the surface of the plurality of second blades 13. Alternatively, the first fixing ring 14 and the second fixing ring 15 can be clamped into the plurality of second blades 13.

[0058] In some embodiments, the plurality of first blades 12 can be axial flow blades, and the plurality of second blades 13 can be centrifugal blades.

[0059] The axial flow blades 200 used by the axial flow fan 100 arranged in the inner circle as shown in FIG. 9 and the centrifugal blades 400 used by the centrifugal fan 300 arranged in the outer circle as shown in FIG. 10 can fully exert the performance of the two types of blades. The axial flow blades 200 used by the axial flow fan 100 have air suction capacity and can increase the air intake. The axial flow blades 200 make the airflow flow in the axial direction shown by the arrow M in FIG. 9 during rotation. The axial flow blades 200 have a forward or backward inclined shape, have a large blade acting area in the axial direction, and generate airflow flowing in the axial direction during rotation. 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, the centrifugal blades 400 have a large acting area in the radial direction, and generate airflow flowing in the radial direction shown by the arrow N in FIG. 10 during rotation. The centrifugal blades can have a good wind sweeping effect at the periphery.

[0060] It should be noted that the embodiments of the present application take the first blades 12 as axial flow blades and the second blades 13 as centrifugal blades as an example for illustration. The plurality of first blades 12 can also be centrifugal blades, and the plurality of second blades 13 can be axial flow blades, which are not limited by the present application.

[0061] In some embodiments, the plurality of first blades 12 can be arranged obliquely, or the plurality of first blades 12 can be arranged curvedly.

[0062] The oblique arrangement of the first blades 12 or the curved arrangement of the first blades 12 can facilitate air suction in the axial direction of the heat dissipation fan. When the first blades 12 are inclined or curved relative to the second blades 13, an air suction characteristic similar to a rotor blade can be formed, so that a pressure difference is formed on both sides of the central shaft 11, thereby increasing the air intake.

[0063] In actual cases, the inclined blades can be conveniently formed, and the curved blades can enhance the air suction capacity. The inclined blades can be straight blade, i.e., the whole is planar, and the whole is arranged to be inclined relative to the second blades 13. The curved blades can be curved blades with large root and small tip, or curved blades with small root and large tip. In addition, in order to adjust the air suction capacity of the first blades 12, different bending degrees can be designed.

[0064] It can also be explained that the shape and number of the axial flow blades are not limited in the embodiments of the present application, and the blades that can realize the basic function of the axial flow fan are within the protection scope of the present application. Similarly, the shape and number of the centrifugal blades are not limited in the embodiments of the present application, and the blades that can realize the basic function of the centrifugal fan are within the protection scope of the present application.

[0065] In some embodiments, in the axial direction of the central shaft 11, the surface of the first blade 12 can not protrude from the surface of the second blade 13.

[0066] 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 shaft 11 is lower than the surface of the second blade 13. Thus, the first blade 12 does not occupy more space, which is conducive to the overall miniaturization of the heat dissipation fan.

[0067] In actual cases, the plurality of second blades 13 and the plurality of first blades 12 can be distributed on different planes, and in the axial direction of the central shaft 11, at least part of each first blade 12 can protrude from the edge of the second blade 13.

[0068] 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 beyond the edge of the second blade 13 on the air inlet side. Thus, the effective area of the first blade 14 is increased, and the air flow in the axial direction is formed in a larger area, so as to increase the air intake of the fan rotor.

[0069] In addition, the plurality of first blades 12 can be uniformly distributed around the central shaft 11, and / or the plurality of second blades 13 can be uniformly distributed around the central shaft 11.

[0070] When the first blade 12 and the second blade 13 are uniformly arranged, they can uniformly play a disturbance role around the central shaft 11, and the stress of the blades is more uniform, so that the operation process of the fan rotor is more stable.

[0071] In some embodiments, the plurality of first blades 12, the plurality of second blades 13, the first fixed ring 14 and the second fixed ring 15 can be integrally formed with the central shaft 11.

[0072] The integral forming 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, and in the manufacturing process, the blades are prone to connection failure due to different manufacturing processes. The integral forming of the first blade 12 and the second blade 13 can ensure the connection strength of each blade after compounding. In addition, the fixing ring 12 can also be integrally formed with the central shaft 11 and each blade.

[0073] Some embodiments of the present application also provide a cooling fan, which comprises a housing, a fan stator and the above-mentioned fan rotor. The fan stator is arranged in the housing, and the fan rotor is rotationally connected with the fan stator.

[0074] The cooling fan can combine the respective characteristics of centrifugal blades and axial-flow blade rotors by using composite blades. The air volume and air pressure of the cooling fan are significantly improved through the characteristics of the suction blades. The cooling fan flow channel can also be optimized to cause a small part of the air flow to be diverted to a part of the heat source concentration area for heat dissipation, thereby improving the overall system heat dissipation capacity and performance.

[0075] In addition, the blades located at the outer ring can be connected by the fixing ring, and the fixing ring is arranged at both ends of the blades located at the outer ring to increase the connection area of the blades. The fixing ring close to the inner ring is connected with the central shaft and / or the blades located at the inner ring, thereby connecting the two types of blades to form a whole. The arrangement of multiple fixing rings can improve the stability of the connection between the outer ring blades and each other and the stability of the connection with the inner ring blades, thereby ensuring the stability of the cooling fan during operation.

[0076] Some embodiments of the present application also provide an electronic device comprising the above-mentioned cooling fan.

[0077] The electronic device can use the above-mentioned cooling fan at a component with a large amount of 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. The problem of insufficient air volume of the electronic device system such as an ultrathin notebook is solved. In addition, the use of multiple fixing forms can ensure the stability of the cooling fan during operation, thereby ensuring the heat dissipation capacity of the cooling fan.

[0078] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for implementing the present application, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A fan rotor, characterized by, Comprising: a central shaft; a plurality of first blades, the plurality of first blades being arranged around the central shaft, and a first end of the plurality of first blades being connected with the central shaft; a plurality of second blades, the plurality of second blades being arranged around the central shaft, and the plurality of second blades being located at a periphery of the plurality of first blades; a first fixing ring, for fixing a first end of the plurality of second blades, and the first fixing ring being arranged around the central shaft; a second fixing ring, for fixing a second end of the plurality of second blades, and the second fixing ring being arranged around the first fixing ring.

2. The fan rotor according to claim 1, wherein: a first end of part of the plurality of second blades is provided with an extension, the extension passing through a space between two adjacent first blades and being connected with the central shaft.

3. The fan rotor according to claim 2, wherein: the extensions at the same space are connected with each other.

4. The fan rotor according to claim 2, wherein: a reinforcing part is arranged between two adjacent extensions connected with the central shaft, and the reinforcing part is arranged extending from a surface of the first fixing ring towards the central shaft.

5. The fan rotor according to claim 1, wherein: the first fixing ring is connected with the plurality of second blades at edge positions in an axial direction of the central shaft, and / or the second fixing ring is connected with the plurality of second blades at edge positions in the axial direction of the central shaft.

6. The fan rotor according to claim 1, wherein: the first fixing ring is connected with the plurality of second blades at middle positions in the axial direction of the central shaft, and / or the second fixing ring is connected with the plurality of second blades at middle positions in the axial direction of the central shaft.

7. The fan rotor according to any one of claims 1 to 6, wherein: 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, wherein: in the axial direction of the central shaft, a surface of the first blade does not protrude from a surface of the second blade.

9. A heat dissipating fan characterized by comprising: Comprising: a housing; a fan stator arranged in the housing; the fan rotor according to any one of claims 1 to 8, the fan rotor being rotationally connected with the fan stator.

10. An electronic device, comprising: The heat dissipation fan comprising the fan rotor according to claim 9.

Images