Fan Rotor, Cooling Fan and Electronic Device

Abstract

The embodiment of the present application relates to the technical field of heat dissipation of electronic devices, and discloses a fan rotor, a heat dissipation fan and an electronic device. The fan rotor includes a central shaft, a plurality of first blades, a plurality of second blades and a fixing ring. A first region and a second region are alternately distributed in the circumferential direction on the periphery of the central shaft. The plurality of first blades are arranged around the central shaft in the first region, and the first ends of the plurality of first blades are all connected to the central shaft. The plurality of second blades are arranged around the central shaft in the second region, and the first ends of the plurality of second blades are all connected to the central shaft. The fixing ring is arranged around the central shaft, and the fixing ring is connected to the second ends of the plurality of first blades. The fan rotor, the heat dissipation fan and the electronic device provided by the embodiment of the present application can improve the heat dissipation capacity of the heat dissipation fan.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heat dissipation of electronic devices, and particularly to a fan rotor, a heat dissipation fan, and an electronic device. Background Art

[0002] With the continuous development of electronic technology, the manufacturing process of core devices in electronic devices has been greatly improved. At the same time, various electronic devices are gradually becoming smaller. This causes the heat generated by various heat-generating components in the electronic device to be relatively concentrated. As the heat accumulates continuously, the normal operation of some components in the electronic device will also be affected. Therefore, it is necessary to adopt a certain heat dissipation form to dissipate the heat of the heat-generating components in the electronic device.

[0003] Currently, air-cooled heat dissipation is still a widely used heat dissipation form. The air-cooled heat dissipation method uses a heat dissipation fan for heat dissipation. During the operation of the heat dissipation fan, the air circulation rate can be increased, and the heat at a specific area can be transferred to the outside in time. The heat dissipation capacity of the heat dissipation fan determines the working performance of the electronic device. Therefore, how to improve the heat dissipation capacity of the heat dissipation fan is an important issue. Summary of the Invention

[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 improve the heat dissipation capacity of the heat dissipation fan.

[0005] To solve the above technical problems, the embodiments of the present application provide a fan rotor. The fan rotor includes a central shaft, a plurality of first blades, a plurality of second blades, and a fixing ring. The periphery of the central shaft is provided with a first area and a second area that are alternately distributed in the circumferential direction. A plurality of first blades are arranged around the central shaft in the first area, and the first ends of the plurality of first blades are all connected to the central shaft. A plurality of second blades are arranged around the central shaft in the second area, and the first ends of the plurality of second blades are all connected to the central shaft. The fixing ring is arranged around the central shaft, and the fixing ring is connected to the second ends of the plurality of first blades.

[0006] The embodiments of the present application also provide a heat dissipation fan. The heat dissipation fan 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] The embodiments of the present application also provide an electronic device. The electronic device includes the above-mentioned heat dissipation fan.

[0008] The fan rotor, heat dissipation fan, and electronic device provided by the embodiments of the present application utilize the hollowed-out area on one side of the blade to arrange the first blade and the second blade simultaneously. One of the first blade and the second blade has an air suction characteristic, which can increase the air pressure, and further increase the air intake volume at the air inlet. The hollowed-out area on one side of the blade reserves an air intake area near the blade, providing favorable conditions for the air intake at the air inlet of the heat dissipation fan. By using the hollowed-out area on one side of the blade and compounding the blade with the air suction characteristic, an additional air suction effect can be added on the basis of the airflow formed by the original blade, increasing the air pressure. Thus, the air intake volume of the heat dissipation fan is effectively increased, and the heat dissipation capacity of the heat dissipation fan is improved.

[0009] In some embodiments, the fan rotor further includes a plurality of third blades. The plurality of third blades are arranged around the central axis in the second region. The first end of each third blade is connected to the fixed ring, and the second end of each third blade extends towards the second blade located in the same region. In this way, by arranging the third blades in the region where the second blade is located, the acting area of the blades can be increased, ensuring the air sweeping effect of the blades.

[0010] In some embodiments, the circumferential direction of the plurality of second blades is opposite to the circumferential direction of the plurality of first blades. In this way, by making the second blades circumscribe in the direction opposite to that of the first blades, a sufficient and unobstructed air intake area can be reserved on the side of the second blades close to the central axis, which is beneficial to increasing the air volume of the heat dissipation fan.

[0011] In some embodiments, there are a plurality of third blades in the same region, and the lengths of the plurality of third blades in the same region gradually increase or gradually decrease in the circumferential direction of the central axis. In this way, by setting the third blades with changing lengths, the outer space of the second blade can be fully adapted, and the third blades can be fully extended.

[0012] In some embodiments, the plurality of first blades are centrifugal blades, and the plurality of second blades are axial flow blades. In this way, by arranging different blades in different regions, the flow disturbance effects of different blades at their respective positions can be compounded, which is beneficial to improving the heat dissipation capacity of the heat dissipation fan.

[0013] In some embodiments, the second ends of the plurality of second blades extend to the position where the fixed ring is located and are connected to the fixed ring. In this way, by connecting the second blades to the fixed ring, the connection stability of the overall blades can be ensured.

[0014] In some embodiments, the projection of each second blade towards the adjacent first type of blade is located within the edge of the first type of blade. In this way, by accommodating the second blade in the area between two adjacent first blades, the space occupation can be reduced, which is beneficial to reducing the volume.

[0015] In some embodiments, the plurality of second blades and the plurality of first blades are distributed on different planes, and at least a part of each second blade protrudes beyond the edge of the first blade in the axial direction of the central axis. In this way, by making the second blade protrude beyond the edge of the first blade, the acting area of the second blade can be increased, thereby enhancing the air suction capacity of the second blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0017] Figure 1 is a schematic structural diagram of a fan rotor of a centrifugal cooling fan in the prior art;

[0018] Figure 2 is a three-dimensional structural diagram of a fan rotor in a cooling fan provided by some embodiments of the present application;

[0019] Figure 3 is a front view structural diagram of a fan rotor in a cooling fan provided by some embodiments of the present application;

[0020] Figure 4 is a top view structural diagram of a fan rotor in a cooling fan provided by some embodiments of the present application;

[0021] Figure 5 is a top view structural diagram of a fan rotor in a cooling fan provided by some other embodiments of the present application;

[0022] Figure 6 is a three-dimensional structural diagram of a fan rotor in a cooling fan provided by some other embodiments of the present application;

[0023] Figure 7 is a three-dimensional structural diagram of a fan rotor in a cooling fan provided by some other embodiments of the present application;

[0024] Figure 8 is a top view structural diagram of a fan rotor in a cooling fan provided by some other embodiments of the present application;

[0025] Figure 9 is a top view structural diagram of a fan rotor in a cooling fan provided by some other embodiments of the present application;

[0026] Figure 10 is a three-dimensional structural diagram of a fan rotor in a cooling fan provided by some other embodiments of the present application;

[0027] Figure 11It is a top view structural schematic diagram of a fan rotor in a heat dissipation fan provided by some other embodiments of the present application;

[0028] Figure 12 It is a three-dimensional structural schematic diagram of a centrifugal heat dissipation fan in the prior art;

[0029] Figure 13 It is a three-dimensional structural schematic diagram of an axial flow heat dissipation fan in the prior art. Specific Embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will elaborate on each embodiment of the present application in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present application, many technical details are provided for 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 solutions claimed in the present application can still be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation to the specific implementation manners of the present application. The various embodiments can be combined and cross-referenced with each other on the premise of no contradiction.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill 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" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0033] As electronic devices continue to trend towards miniaturization, the demand for heat dissipation is also increasing. For example, electronic devices such as computers and laptops have designed various heat dissipation forms such as air cooling and liquid cooling for components with high heat generation. In air cooling, a heat dissipation fan is mainly used to dissipate heat from the heat-generating components. The fan rotor of the heat dissipation fan can enhance 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 during the operation of the heat-generating components can be continuously conducted to the surrounding air, thereby completing heat dissipation.

[0034] Currently, the centrifugal cooling fan is more commonly used in electronic devices. As Figure 1 shown, multiple centrifugal blades 300 are formed on the fan rotor of the centrifugal cooling fan on the central shaft 100 and the fixed ring 200. This centrifugal cooling fan can conduct the heat at a specific area in time, so it is widely used in different electronic devices.

[0035] However, for the existing centrifugal cooling fan, when the flow rate is large, the air pressure will be relatively small. When the air pressure is relatively large, the flow rate will be relatively small. Due to the large system impedance and small intake space of the centrifugal cooling fan, the flow rate loss in the system is too large, thus affecting the heat dissipation ability of the cooling fan.

[0036] In order to improve the heat dissipation ability of the cooling fan, some embodiments of the present application provide a cooling fan applicable to electronic devices such as notebooks and personal computers (PCs). The fan rotor of the cooling fan effectively overcomes the problem of too small system flow rate under the conditions of large system impedance and unsatisfactory intake conditions by combining blades with rotor characteristics. It can break through the performance bottleneck of the current centrifugal cooling fan, enhance the overall heat dissipation ability and user experience, and optimize and improve the overall system performance.

[0037] Combining blades with rotor characteristics can improve the flow rate and air pressure of the cooling fan. The fan rotor of the cooling fan provided by some embodiments of the present application adds blades with rotor characteristics on the basis of the centrifugal blades. While ensuring the air sweeping ability of the cooling fan, it can increase the air intake volume of the cooling fan, effectively improve the performance of the cooling fan unit and enhance the anti-backflow ability of the cooling fan, and reduce the flow rate loss of the intake system and the cooling fan. It can increase the flow rate of the cooling fan entering the system under the same size, break through the performance bottleneck of the conventional centrifugal cooling fan, and improve the heat dissipation ability of the cooling fan.

[0038] The following Figures 2 to 11 describes the fan rotor in the cooling fan provided by some embodiments of the present application.

[0039] As Figures 2 to 7As shown in the figure, the fan rotor provided by some embodiments of the present application includes a central shaft 11, a plurality of first blades 12, a plurality of second blades 13 and a fixing ring 14. The periphery of the central shaft 11 is provided with a first region 101 and a second region 102 which are alternately distributed in the circumferential direction. The plurality of first blades 12 are arranged around the central shaft 11 in the first region 101, and the first ends of the plurality of first blades 12 are all connected to the central shaft 11. The plurality of second blades 13 are arranged around the central shaft 11 in the second region 102, and the first ends of the plurality of second blades 13 are all connected to the central shaft 11. The fixing ring 14 is arranged around the central shaft 11, and the fixing ring 14 is connected to the second ends of the plurality of first blades 12.

[0040] The central shaft 11 is the part of the fan rotor for fixing the blades, and can also be called the disk or hub of the blades, or form the motor housing. The fan rotor cooperates with the fan stator and rotates relative to the fan stator under the drive of the motor. During the rotation of the blades along with the central shaft 11, the surrounding air will be disturbed to form an air flow, promoting gas heat exchange.

[0041] The plurality of first blades 12 and the plurality of second blades 13 are both arranged around the central shaft 11. For example, the plurality of first blades 12 and the plurality of second blades 13 can be arranged around the same center. One of the first blade 12 and the second blade 13 plays a role in directional heat dissipation in the fan rotor, and the other has the ability to suck air.

[0042] For example, in some cases, the first blade 12 can be a centrifugal blade. The number of the first blades 12 is relatively large, and the plurality of first blades 12 generate centrifugal force during rotation, disturbing the air to generate an air flow flowing in a specific direction. The first blade 131 extends from the edge of the central shaft 11 to the fixing ring 14 on the periphery of the central shaft 11. The edge of the first blade 131 can terminate at the fixing ring 14. The edge of the first blade 131 can also extend beyond the fixing ring 14 by a part to ensure the air-sweeping ability of the blade.

[0043] The second blade 13 can be an axial-flow blade, with the ability to suck air, which can improve the air intake volume. In actual situations, in the direction of surrounding the central shaft 11, one side edge of the second blade 13 is closer to the first blade 131 than the other side edge, having the axial air-sucking characteristic of a rotor blade. As a blade with the ability to suck air, the second blade 13 can play a role in sucking air in the reserved area left on one side of the first blade 131, making the gas flow along the axis direction of the central shaft 11. Through the axial air-sucking ability of the second blade 13, the air volume entering the cooling fan can be effectively increased.

[0044] It should be noted that in the embodiments of the present application, the first blade 12 may be a centrifugal blade, and the second blade 13 may be an axial-flow blade as an example for illustration. In actual situations, the first blade 12 may also be an axial-flow blade, and the second blade 13 may be a centrifugal blade. That is, the centrifugal blade and the axial-flow blade can be selected according to the actual situation and arranged in the first region 101 and the second region 102. The centrifugal blade and the axial-flow blade can be designed to have the same length or different lengths. When the two types of blades have different lengths, the length of the centrifugal blade can be greater than that of the axial-flow blade, or the length of the axial-flow blade can be greater than that of the centrifugal blade. When the first blade 12 and the second blade 13 extend from the root to the end, they can both extend along a curve to fully extend the blades, which is beneficial to improving the air volume and air pressure.

[0045] In addition, in the embodiments of the present application, the shape and number of the axial-flow blades are not limited, and any fan blade that can achieve the basic functions of an axial-flow fan blade is within the protection scope of the present application. Similarly, in the embodiments of the present application, the shape and number of the centrifugal blades are not limited, and any fan blade that can achieve the basic functions of a centrifugal fan blade is within the protection scope of the present application.

[0046] The fixing ring 14 is arranged around the central shaft 11 and can play a fixing role at the end of the blade, so that the whole blade remains stable during operation. Thereby reducing the noise during the operation of the blade, and it can also be called a silent ring. The number of the fixing rings 14 can be one or more, and the fixing ring 14 can be connected to the central shaft 11 through the first blade 12. When the extension lengths of the second blade 13 and the first blade 12 are basically the same, the second blade 13 can also be connected to the central shaft 11 at the same time.

[0047] The fan rotor provided by some embodiments of the present application utilizes the hollowed-out area on one side of the blade to arrange the first blade 12 and the second blade 13 at the same time. One of the first blade 12 and the second blade 13 has an air suction characteristic, which can increase the air pressure and thus increase the air volume at the air inlet. The hollowed-out area on one side of the blade reserves an air inlet area near the blade, providing favorable conditions for the air inlet of the cooling fan. By using the hollowed-out area on one side of the blade and compounding the blade with the air suction characteristic, an additional air suction effect can be added on the basis of the air flow formed by the original blade, increasing the air pressure. Thereby effectively improving the air volume of the cooling fan and enhancing the heat dissipation capacity of the cooling fan.

[0048] In some embodiments, the fan rotor may further include a plurality of third blades 15, and the plurality of third blades 15 are arranged around the central shaft 11 in the second region 102. The first end of each third blade 15 is connected to the fixing ring 14, and the second end of each third blade 15 extends towards the second blade 13 located in the same region.

[0049] The third blade 15 is the same type of blade as the first blade 12 or the second blade 13, that is, the third blade 15 can be a centrifugal blade or an axial flow blade, which can enhance the centrifugal effect or the air suction effect of the blade. The third blade 15 is connected to the fixed ring 14. The length of the third blade 15 is less than that of the first blade 12. The third blade 15 only occupies a small part of the space around the central axis 11 relative to the first blade 12 with a complete shape. At this time, the length of the second blade 13 is less than that of the first blade 12, leaving a space around the second blade 13. By arranging the third blade 15 in this part of the space, while ensuring that the air inlet area is sufficient, the edge air sweeping ability of the cooling fan can be ensured. In order to improve the stability of the third blade 15, fixed rings 14 can be arranged at both ends of the third blade 15 for connection. In actual situations, the second end of the third blade 15 can also be connected to the second blade 13.

[0050] When the first blade 12 and the third blade 15 are arranged simultaneously, a part of the air sweeping blades in the blade coverage area of the centrifugal cooling fan can be reduced, and a short blade design can be adopted, and the second blade 13 can be added to the vacant part. At this time, there is a gap between the third blade 15 and the central axis 11, and a reserved area is formed on one side in the thickness direction of the first blade 12, and multiple second blades 13 can be dispersed in multiple reserved areas. Each reserved area can be distributed with one second blade 13 or multiple second blades 13. The arrangement form of the third blade 15 and the first blade 12 can be an alternately distributed form with a certain pattern, or a randomly distributed form without a pattern.

[0051] In actual situations, the first blade 12 and the third blade 15 can be combined with the second blade 13 together to design a fan rotor as shown in Figures 2 to 6 Also, a fan rotor can be designed only by combining the first blade 12 and the second blade 13, as shown in Figure 7 Shown. Or as shown in Figure 8 Shown, the fan rotor adopts a composite blade of the second blade 13 and the third blade 15, and some of the third blades 15 can be connected to the adjacent second blades 13 together.

[0052] In addition, the two types of blades in the fan rotor can also be arranged on different planes. As shown in Figure 9 Shown, the fan rotor adopts a composite blade of the first blade 12 and the second blade 13, and the two types of blades are arranged in layers, and the two types of blades can also be joined together. As shown in Figure 10 Shown, in the layered arrangement, the inclination angle of the second blade 13 can also be set to an obtuse angle relative to the inclination angle of the first blade 12. Or, the second blade 13 of the fan rotor can also be directly formed on the first blade 12 to form a composite blade as shown in Figure 11 Shown. In actual situations, the shape of the second blade 13 can have various forms, including but not limited toFigures 2 to 11 Straight blades or curved blades of different sizes or different degrees of deformation as shown. Among the curved blades, blades with a more curved root, or a more curved end, or the same degree of curvature at the root and the end can be adopted.

[0053] Such as Figure 6 As shown, in some embodiments, the circumferential direction of the plurality of second blades 13 can be opposite to the circumferential direction of the plurality of first blades 12.

[0054] When the second blade 13 and the first blade 12 are arranged, they can both have a certain inclination angle. That is to say, when arranging the blades, the end of the blade and the root of the blade can be made not in the same radial direction of the central axis 11. That is, the end of the blade can be inclined towards one side, and the inclined direction can be defined as the circumferential direction of the blade. In Figure 6 In the shown case, the end of the first blade 12 is inclined and arranged towards the first blade 12 at a later position in the clockwise direction. That is, the first blade 12 is arranged in a circumferential arrangement in the clockwise direction. The overall extension direction of the first blade 12 is arranged at an acute angle with the tangential direction of the central axis 11, while the second blade 13 is circumferentially arranged in the opposite direction, and the overall extension direction of the second blade 13 is arranged at an obtuse angle with the tangential direction.

[0055] By arranging the second blade 13 to circumferentially arrange in the opposite direction to the first blade 12, an enough and unobstructed air inlet area can be reserved without occupying too much space for the arrangement of the centrifugal blades. To increase the air intake volume of the cooling fan, which is beneficial to improving the heat dissipation performance of the cooling fan.

[0056] In some embodiments, there can be multiple third blades 15 in the same area, and the lengths of the multiple third blades 15 in the same area gradually increase or gradually decrease in the circumferential direction of the central axis 11.

[0057] By setting the third blade 15 with a variable length, the space left by the inclined arrangement of the second blade 13 can be better adapted. Thus, the length of the third blade 15 can be fully extended, effectively improving the air sweeping ability of the blade. Such as Figure 6 As shown, the lengths of the multiple third blades 15 in the same area can gradually increase in the clockwise direction around the central axis 11, so as to fully extend on the side where the second blade 13 is far from the central axis 11 and increase the acting area of the blade.

[0058] In addition, the second end of the third blade 15 can also be connected to the second blade 13 to improve the overall connection stability of the blades.

[0059] In actual situations, the first blades 12 and the third blades 15 can be distributed at intervals in combinations formed by different quantities. When multiple first blades 12 are distributed together, the overall blade distribution density can be ensured, thereby ensuring the overall wind-sweeping ability of the blades. When multiple third blades 15 are distributed together, the size of the air inlet area left can be ensured to be appropriate, providing a sufficient air inlet area without causing excessive blockage.

[0060] As Figures 2 to 4 shown, the first blades 12 and the third blades 15 can both be distributed at intervals in groups of three. That is, when viewed from the direction of the center around the central axis 11, three first blades 12 and three third blades 15 are distributed alternately in sequence. It is possible to provide a sufficiently large air inlet area while ensuring the wind-sweeping ability of the overall blades. The distribution form of the first blades 12 and the third blades 15 can also be as Figure 5 and Figure 6 shown. As Figure 5 shown, the first blades 12 are distributed at intervals in groups of four, and the third blades 15 are distributed at intervals in groups of one. As Figure 6 shown, there are multiple first blades 12 and third blades 15, and the lengths of the multiple third blades 15 in the same area show a gradually changing form along with the shape change of the second blade 13. In actual situations, the first blades 12 and the third blades 15 can also be distributed in other forms.

[0061] In some embodiments, multiple first blades 12 can be centrifugal blades, and multiple second blades 13 can be axial-flow blades.

[0062] Arrange the centrifugal blades 120 used in the centrifugal fan 110 shown in Figure 12 in the first region 101, and arrange the axial-flow blades 140 used in the axial-flow fan 130 shown in Figure 13 in the second region 102, which can give full play to the performance of the two types of blades. The centrifugal fan 110 can arrange a relatively large number of centrifugal blades 120. The centrifugal blades 120 have a relatively large acting area in the radial direction and generate an air flow flowing in the radial direction shown by the arrow M in Figure 12 . The centrifugal blades 120 can play a good role in sweeping the wind. The axial-flow blades 140 used in the axial-flow fan 130 have the ability to suck air and can improve the air intake volume. During the rotation of the axial-flow blades 140, the air flow is made to flow in the axial direction shown by the arrow N in Figure 13 . The axial-flow blades 140 have a forward-tilted or backward-tilted shape, have a relatively large blade acting area in the axial direction, and generate an air flow flowing in the axial direction during rotation. The number of axial-flow blades 140 is usually small, and a single axial-flow blade 140 occupies a relatively large area when arranged.

[0063] In some embodiments, when the type of the third blade 15 is the same as that of the first blade 12, multiple third blades 15 and multiple first blades 12 can be located in the same plane, and the multiple third blades 15 and the multiple first blades 12 can be evenly distributed around the central axis 11.

[0064] That is to say, the centrifugal blades including the third blade 15 and the first blade 12 are arranged in a uniform form around the central axis 11 as a whole. It can ensure that the centrifugal blades covering a full circle around the central axis 11 play a sweeping role evenly, thereby ensuring that the stability of the cooling fan during operation will not be affected due to the concentrated force on the blades at some positions.

[0065] Such as Figure 7 As shown, when the length of the second blade 13 is basically the same as that of the first blade 12, the second blade 13 can also be connected to the fixing ring 14. That is, the second ends of the multiple second blades 13 extend to the position where the fixing ring 14 is located and are connected to the fixing ring 14.

[0066] By fully extending the second blade 13, the acting area of the second blade 13 itself can be increased, and a good axial air suction effect can be generated. Moreover, connecting the multiple second blades 13 to the fixing ring 14 can ensure the connection stability of the overall blades, thereby ensuring the stability of the cooling fan during operation.

[0067] In some embodiments, when the second blade 13 is an axial flow blade, each second blade 13 can be inclined relative to the first blade 12 in the same direction, or each second blade 13 can be bent relative to the first blade 12 in the same direction.

[0068] The inclined setting or the bent setting of the second blade 13 can facilitate the axial air suction of the cooling fan. When the second blade 13 is inclined or bent relative to the first blade 12, an air 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 by the second blade 13, thereby increasing the air intake.

[0069] In actual situations, inclined blades are convenient for manufacturing and forming, while bent blades can enhance the air suction ability. The inclined blades can adopt straight plate-shaped blades, that is, the whole is planar and is inclined relative to the first blade 12 as a whole. The bent blades can adopt bent blades with a large end and a small root, or bent blades with a small end and a large root. In addition, in order to adjust the air suction ability of the second blade 13, different bending degrees can be designed.

[0070] In some embodiments, the projection of each second blade 13 facing the adjacent first blade 12 is located within the edge of the first blade 12.

[0071] That is to say, the overall size of the second blade 13 does not exceed that of the first blade 12, and the second blade 13 can be placed in the reserved area on one side of the first blade 131. The length and width of the second blade 13 are both smaller than those of the first blade 12, so that the projection of the second blade 13 facing the adjacent first blade 12 is located within the edge of the first blade 12. Furthermore, the second blade 13 does not occupy extra space for layout, which is beneficial to reducing the volume of the fan rotor.

[0072] In some embodiments, multiple second blades 13 and multiple first blades 12 can be distributed on different planes, and at least part of each second blade 13 protrudes beyond the edge of the first blade 12 in the axial direction of the central axis 11.

[0073] The second blade 13 is arranged at the air inlet of the fan rotor, can be distributed on a different plane from the first blade 12, and extends beyond the edge of the first blade 12 on the air inlet side. Thereby, the acting area of the second blade 13 is increased, and axial air flow is formed in a larger area to increase the air intake volume of the fan rotor.

[0074] In addition, multiple first blades 12 can be evenly distributed around the central axis 11, and / or multiple second blades 13 are evenly distributed around the central axis 11.

[0075] When the first blade 12 and the second blade 13 are evenly arranged, they can evenly play a disturbing role around the central axis 11, and the force on the blades is relatively uniform, so that the operation process of the fan rotor is more stable. Both the first type and the second type of blades 132 in the first blade 12 can be evenly arranged.

[0076] In some embodiments, multiple first blades 12 and multiple second blades 13 can be integrally formed with the central axis 11.

[0077] Adopting an integrally formed 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 during the manufacturing process, connection failure of the blades is likely to occur due to different manufacturing processes. By using an integrally formed method for the combination of the first blade 12 and the second blade 13, the connection strength of each blade after combination can be ensured. In addition, the fixing ring 14 and the third blade 15 can also be integrally formed with the central axis 11.

[0078] In some embodiments, the central axis 11 can include a connected first central axis and a second central axis, the first end of each first blade 12 is connected to the first central axis 11, and the first end of each second blade 13 is connected to the second central axis 11.

[0079] The two central shafts 11 can provide a fixed base for different blades. When forming a fan rotor with composite blades, the two central shafts 11 can be fixedly connected so that the blades on the two central shafts 11 are combined together. This facilitates the manufacturing and forming of the fan rotor, is conducive to the manufacturing and forming of blades with complex shapes, and gives full play to the characteristics of the west wind blades.

[0080] In actual situations, a collar can also be used to replace the central shaft 11, and the second blade 13 is formed on the periphery of the collar. Then, the collar is matched with the central shaft 11 of the first blade 12 to form a composite blade.

[0081] As shown in Table 1 below, through simulation comparison, the air suction capacity of the cooling fan with composite blades at the air inlet is significantly better. In actual proofing, the maximum static pressure of the cooling fan with composite blades will be greater than that of a conventional centrifugal cooling fan. It can be obtained from the simulation data that when the rotational speeds are the same, the maximum air volume of the cooling fan with composite blades increases by about 16.2%. Therefore, in some embodiments of the present application, in the cooling fan, by adopting composite blades, the characteristics of centrifugal blades and axial flow blades can be combined, and it has the advantages of high air volume and high wind pressure at the same time.

[0082] Table 1. Simulation comparison data table of a centrifugal cooling fan and a cooling fan with composite blades. Among them, RPM refers to Revolutions Per Minute, that is, revolutions per minute; Q max refers to the maximum air volume, cfm refers to cubic feet per minute, that is, cubic feet per minute; P max refers to the maximum static pressure value, mmaq refers to millimeter aqueous, that is, millimeter water column.

[0083]

[0084] In actual situations, the fan rotor can be made in different forms. For example, it can be integrally molded. The conventional centrifugal blades are changed to a design of long and short blades, and blades with air suction functions are added at the short blade positions. The mold opening cost of integral molding is low, and the air suction blades can be inclined straight plate blades or axial flow blades with simple shapes.

[0085] It can also be made by separately molding and injecting. The separately made blades are combined together by forms such as welding and bonding. Since the composite blades are separately molded, the shape of the air suction blades can be made more complex, which can give full play to the characteristics of axial flow fan blades and will greatly improve the overall performance of the composite blades.

[0086] Some embodiments of the present application further provide a cooling fan, which includes a housing, a fan stator and the above-mentioned fan rotor. The fan stator is disposed within the housing, and the fan rotor is rotatably connected to the fan stator.

[0087] By adopting composite blades, the cooling fan can improve its performance significantly without increasing costs compared to the original design. Due to the characteristics of the air intake blades, the impedance resistance of the cooling fan can be enhanced, and the air flow conversion rate of the cooling fan into the system can be increased. Additionally, the blade molds can be used for mass production, integrating the characteristics of centrifugal blades and rotor blades similar to axial flow blades, which can significantly increase the air volume and air pressure of the cooling fan. Moreover, by optimizing the flow channel of the cooling fan, a small portion of the air flow can be diverted to some areas with concentrated heat sources for heat dissipation, improving the heat dissipation capacity and performance of the overall system.

[0088] Some embodiments of the present application further provide an electronic device, which includes the above-mentioned cooling fan.

[0089] The electronic device can use the above-mentioned cooling fan at components with high heat generation. Based on the longitudinal air intake characteristics of the second blade, the air intake volume at the air inlet of the cooling fan can be increased. Then, through the combination of long and short blades in the first blade, the incoming air can be more effectively compressed laterally, effectively increasing the air volume and air pressure at the air outlet. Moreover, the second blade has a strong suction force towards one side, which can reduce the overflow of air volume from the air inlet. The cooling fan has a strong impedance resistance when entering the system, and can obtain a higher conversion efficiency after entering the system, and the system air flow will also be higher. Thereby, the heat exchange efficiency of the system can be improved, and the heat dissipation performance can be enhanced. This solves the problem of insufficient air volume in the system of electronic devices such as ultra-thin laptops. While ensuring the performance of the cooling fan, the size of the cooling fan can be reduced, the space usage area and the product weight can be decreased, and the performance and user experience of the overall system under the same conditions can be improved.

[0090] Those of ordinary skill in the art can understand that the above-described embodiments are specific examples 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 in that, Comprising: A central axis, with a first region and a second region alternately distributed in the circumferential direction around the periphery of the central axis; A plurality of first blades, which are arranged around the central axis in the first region, and the first ends of the plurality of first blades are all connected to the central axis; A plurality of second blades, which are arranged around the central axis in the second region, and the first ends of the plurality of second blades are all connected to the central axis; A fixing ring, which is arranged around the central axis, and the fixing ring is connected to the second ends of the plurality of first blades; The fan rotor further includes a plurality of third blades, which are arranged around the central axis in the second region, the first end of each third blade is connected to the fixing ring, and the second end of each third blade extends towards the second blade in the same region; There are a plurality of third blades in the same region, and the lengths of the plurality of third blades in the same region gradually increase or gradually decrease in the circumferential direction of the central axis.

2. The fan rotor according to claim 1, wherein: The circumferential direction of the plurality of second blades is opposite to the circumferential direction of the plurality of first blades.

3. The fan rotor according to claim 1, wherein: The plurality of first blades are centrifugal blades, and the plurality of second blades are axial flow blades.

4. The fan rotor according to claim 1, wherein: The second ends of the plurality of second blades extend to the position where the fixing ring is located and are connected to the fixing ring.

5. The fan rotor according to claim 1, wherein: The projection of each second blade towards the adjacent first blade is located within the edge of the first blade.

6. The fan rotor according to claim 1, wherein: In the axial direction of the central axis, at least a part of each second blade protrudes beyond the edge of the first blade.

7. A cooling fan, characterized in that, Comprising: A housing; A fan stator, which is arranged in the housing; The fan rotor according to any one of claims 1 to 6, and the fan rotor is rotatably connected to the fan stator.

8. An electronic device, characterized in that, Including the cooling fan according to claim 7.

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