Axial fans and computing devices

Abstract

This application provides an axial fan and a computing device. The axial fan includes a first structural member and a second structural member. The first structural member has at least one limiting groove on its limiting surface for setting a limiting structure. The second structural member includes a limiting surface with multiple grooves spaced apart circumferentially thereon. Each groove includes a first groove wall and a second groove wall. When the limiting structure is subjected to a force from the first groove wall, it can retract towards the interior of the limiting groove and slide out of the current groove, switching to a retracted state. This allows the first and second structural members to rotate relative to each other around a first axis. When the limiting structure is subjected to a force from the second groove wall, it can remain in position abutting against the current groove, thus limiting the relative rotation between the first and second structural members. The axial fan of this application is less prone to reverse rotation, ensuring the heat dissipation effect of the computing device, balancing the economic benefits of the computing device, and improving operational reliability.

Description

Technical Field

[0001] This application relates to the field of computing device technology, and in particular to an axial flow fan and a computing device. Background Technology

[0002] With the rapid development of computer technology, the scale of cloud computing and data center construction is expanding daily, and the application of large-scale computing equipment such as personal computers, servers, and core processors in large data centers is becoming increasingly widespread. The performance and processing power of these devices have significantly improved with the rapid development of information technology, enabling them to solve increasingly complex scientific and engineering problems. However, with the increase in computing power, the heat generated by these devices also increases accordingly, making heat dissipation a key factor in ensuring the stable operation and performance of computing equipment.

[0003] In the design and maintenance of computing devices, heat dissipation technology plays a crucial role. Overheating can not only lead to a decrease in the performance of computing devices, but may also cause hardware damage or even system failure. At present, the heat dissipation technology of computing devices can be broadly divided into two categories: air cooling and liquid cooling. Among them, air cooling, as a traditional heat dissipation method, uses axial fans or auxiliary airflow devices to accelerate airflow and remove heat.

[0004] Most large computing devices support hot-swapping of compute nodes, allowing nodes to be inserted or removed without powering down the system without affecting or damaging it. However, for economic reasons, large computing devices often shut down the axial fan at the node when it is removed. This can cause the fan to reverse, allowing heat that has been conducted to the outside of the chassis to re-enter and carry heat back into the chassis, hindering system cooling.

[0005] Therefore, in existing computing devices, axial fans that are not powered on are prone to reverse rotation, causing some heat to flow back into the computing device chassis, affecting the overall heat dissipation capacity of the computing device. Summary of the Invention

[0006] The axial fan and computing device provided in this application embodiment solve the problem in the prior art that the axial fan is prone to reverse rotation, which affects the overall heat dissipation capacity of the computing device.

[0007] A first aspect of this application provides an axial flow fan, including a first structural member and a second structural member, which are rotatable relative to each other about a first axis. The first structural member includes a limiting surface with at least one limiting groove. Each limiting groove contains a limiting structure, which is telescopic, allowing it to switch between an extended and retracted state. The second structural member includes a limited surface opposite to the first structural member. The limited surface is a concave-convex surface surrounding the first axis and has multiple grooves spaced circumferentially around it. Each groove includes a first groove wall and a second groove wall opposite to each other circumferentially around the second structural member, with a protrusion between adjacent grooves.

[0008] When the limiting structure is in the extended state, the end of the limiting structure away from the limiting groove abuts against the corresponding groove. Furthermore, when the limiting structure is subjected to a force applied by the first groove wall of the groove, the limiting structure can retract towards the interior of the limiting groove and slide out of the current groove, switching to the retracted state, allowing relative rotation between the first and second structural members around the first axis. When the limiting structure is subjected to a force applied by the second groove wall of the groove, the limiting structure remains in the position abutting against the current groove, thus restricting relative rotation between the first and second structural members. When the limiting structure is in the retracted state, the end of the limiting structure away from the limiting groove is located outside the groove.

[0009] When the axial fan rotates forward, the first structural component and the second structural component rotate relative to each other, and the limiting structure alternates between the extended state and the retracted state.

[0010] The axial flow fan provided in this application includes a first structural component and a second structural component. When the axial flow fan rotates forward, the first structural component and the second structural component can rotate relative to each other around a first axis, thereby accelerating the airflow around the axial flow fan. Here, forward rotation of the axial flow fan refers to the direction of rotation when the axial flow fan is operating normally under power.

[0011] The first structural component includes a limiting surface, and correspondingly, the second structural component includes a limited surface, with the limiting surface and the limited surface being disposed opposite to each other. The limiting surface has at least one limiting groove for a limiting structure, and the limiting structure is a telescopic structure. The limited surface is a concave-convex surface. The limited surface of the second structural component has multiple grooves and protrusions spaced circumferentially, allowing the limiting structure to alternate between an extended state and a retracted state. Each groove includes a first groove wall and a second groove wall disposed opposite to each other circumferentially on the second structural component. That is, when the limiting structure is in the extended state, it abuts against the corresponding groove. During the forward rotation of the axial fan, the limiting structure is subjected to a force exerted by the first groove wall of the current groove, causing the limiting structure to slide out of the current groove and retract towards the interior of the limiting groove, thus switching to the retracted state. When the limiting structure alternates between the extended and retracted states, the first and second structural components can rotate relative to each other around a first axis, meaning the axial fan can rotate forward.

[0012] Due to the function of the upper limit structure of the first structural component, even if the axial fan tends to reverse (which can be understood as the reverse direction being exactly opposite to the forward rotation), the limit structure will be subjected to the force exerted by the second groove wall of the current groove, causing the limit structure to abut against the wall of the limit groove and preventing it from retracting into the limit groove. This results in the limit structure remaining fixed in the current groove, preventing relative rotation between the first and second structural components and hindering the axial fan from reversing.

[0013] The axial fan provided in this application can be used in the cooling system of computing devices. The forward rotation of the axial fan accelerates airflow within the computing device, speeding up heat exchange and thus efficiently cooling the device, ensuring stable and reliable operation. In one example, in a scenario where the computing device supports hot-swapping of computing nodes, some unpowered axial fans may be affected by axial fans in other normally operating areas, causing them to tend to reverse. However, because the limiting structure abuts against the limiting groove, it restricts the relative rotation between the first and second structural components, preventing the axial fans from reversing. Therefore, it ensures that external heat flow from the computing device chassis does not re-enter the chassis through the unpowered axial fans, thus ensuring the cooling effect of the computing device.

[0014] Understandably, when the computing nodes corresponding to the axial fans in some areas are not working, these axial fans can also stop working and will not reverse, thus preventing heat from being carried back into the computing device chassis. This ensures the cooling effect of the computing device itself while also taking into account the economic benefits of the computing device, reducing the operating costs of the computing device, and to some extent improving the cooling capacity of the computing device, thereby improving the reliability of the computing device operation.

[0015] In summary, the axial fan provided in this application embodiment is not prone to reverse rotation. In areas where the power is off, the axial fan will not carry the heat from outside the computing device chassis back inside, thus ensuring the heat dissipation effect of the computing device. Furthermore, it can better balance the economic benefits of the computing device and improve the reliability of its operation.

[0016] In one possible implementation, the limiting structure includes a limiting member and an elastic member. The limiting member is slidably connected to the limiting groove along its length, and the elastic member abuts against one end of the limiting member and the bottom of the limiting groove. When the limiting structure is in an extended state, the other end of the limiting member abuts against the corresponding groove.

[0017] Using the above scheme, the limiting component can slide along the length of the limiting groove. Furthermore, the limiting component switches between the compressed and extended states of the limiting structure through the compression and release of the elastic component, thereby ensuring the stability of the relative rotation between the first and second structural components, and thus ensuring the stability and reliability of the forward rotation of the axial flow fan.

[0018] Furthermore, when the axial fan tends to reverse, the limiting member will be subjected to the force exerted by the second groove wall of the current groove, causing the limiting member to abut against the wall of the limiting groove, thereby restricting the relative rotation between the first structural member and the second structural member, and thus more effectively preventing the axial fan from reversing.

[0019] In one possible implementation, when the limiting structure is in an extended state, the end face of the other end of the limiting member abuts against the first groove wall surface of the groove, and the outer side surface of the other end of the limiting member abuts against the second groove wall surface of the groove.

[0020] By adopting the above scheme, the limiting component can abut against the groove wall surface, better realize the transmission of force, and thus ensure the function of the limiting component when it abuts against different groove side walls, thereby improving the structural stability of the axial flow fan.

[0021] In one possible implementation, the limiting element is a limiting post, and the elastic element is a spring.

[0022] In one possible implementation, the limiting groove extends simultaneously in the circumferential direction of the first structural member and in the direction of the first axis.

[0023] By adopting the above scheme, the limiting groove can better match the relative rotation characteristics between the first and second structural components, and the limiting structure can be arranged in a targeted manner so that the limiting structure can be continuously compressed into the limiting groove during the forward rotation process, thereby ensuring the reliable performance of the axial fan.

[0024] In one possible implementation, in the groove, the first edge of each of the first and second groove walls is located at the opening of the groove, and the second edge of each groove wall is located at the bottom of the groove, or at a position between the opening and the bottom of the groove. From the first edge to the second edge of each groove wall, the first and second groove walls gradually extend in a direction that approaches each other.

[0025] With the above scheme, the first groove wall and the second groove wall can abut against the limiting structure in real time during the relative rotation between the first structural member and the second structural member, thereby more stably realizing the alternating switching of the limiting structure between the elongated state and the contracted state.

[0026] In one possible implementation, the groove is configured as a serrated groove, and the protrusion is configured as a serrated protrusion.

[0027] Using the above solution, the grooves and protrusions on the second structural component are easy to implement and the process is simple.

[0028] In one possible implementation, at least one limiting groove is actually multiple limiting grooves, which are distributed in a ring-shaped interval on the limiting surface. In the circumferential direction of the first structural member, the bottom of the limiting groove is located between the opening of the groove and the opening of an adjacent limiting groove.

[0029] The design of the upper limit slot of the first structural component is more flexible and can be configured according to the direction of the axial fan's forward rotation, which is beneficial to the stability of the function.

[0030] In one possible implementation, the locating surface and the limiting surface are positioned opposite each other in the direction of the first axis.

[0031] By adopting the above scheme, the groove on the limited surface and the limiting structure on the limiting surface can be directly matched. The structure is simple and helps to improve the stability of the structure and the reliability of the function.

[0032] In one possible implementation, the axial fan includes a housing, an impeller, and a motor. The housing includes a cylindrical section and a base. The cylindrical section includes a first end and a second end disposed opposite to each other in the direction of a first axis. The base is located within an opening formed by the first end and connected to the first end. An air inlet is formed between the outer peripheral surface of the base and the inner wall surface of the first end. An air outlet is formed around the inner wall surface of the second end. The cylindrical section surrounds the outer peripheral side of the impeller, and the impeller is rotatable relative to the housing about the first axis. The motor is mounted on the base and is used to drive the impeller to rotate.

[0033] When the axial fan rotates forward, the impeller rotates in the forward direction, causing the airflow to flow from the inlet to the outlet.

[0034] In one possible implementation, the motor includes a stationary part, a moving part, and a bearing assembly. The bearing assembly is disposed between the stationary part and the moving part. An impeller is fixedly connected to the moving part, and the stationary part is fixedly connected to the base. The bearing assembly includes a fixed part and a rotating part. The rotating part is rotatable relative to the fixed part about a first axis. The fixed part of the bearing assembly is fixedly connected to the stationary part, and the rotating part is fixedly connected to the moving part, so that the moving part is rotatably connected to the stationary part through the bearing assembly.

[0035] Wherein, the first structural component is the base, and the second structural component is the rotating part of the rotor or bearing device of the moving part; or, the first structural component is the rotating part of the rotor or bearing device of the moving part, and the second structural component is the base.

[0036] Using the above scheme, the limiting structure can simultaneously enable the forward rotation of the axial fan and restrict the reverse rotation between the first and second structural components, thus limiting the reverse rotation of the axial fan. Furthermore, the limiting structure is flexible in configuration and easy to implement.

[0037] A second aspect of this application provides a computing device including a chassis, a node module, and a fan module. The chassis has a first cavity, a connecting cavity, and a second cavity arranged sequentially and communicating along a first direction. The first cavity includes a plurality of first mounting cavities arranged sequentially along a second direction. Each first mounting cavity has an air inlet at one end and an air outlet at the other end, and communicates with the connecting cavity. The plurality of first mounting cavities are interconnected through their respective air outlets and the connecting cavity. The second cavity includes a plurality of second mounting cavities arranged sequentially along the second direction, wherein the first direction is perpendicular to the second direction.

[0038] The node module includes at least one computing node, and each computing node is installed in the first mounting cavity corresponding to the first cavity.

[0039] The fan module includes multiple axial fan groups arranged sequentially in a second direction and corresponding to multiple second mounting cavities. Each axial fan group is installed in a corresponding second mounting cavity and includes at least one axial fan. Furthermore, some or all of the axial fans in the fan module adopt the axial fans provided in the first aspect and any possible implementation thereof. The air inlet of each axial fan is arranged opposite to the air outlet of at least one first mounting cavity in the first direction, and the air outlet of each axial fan faces the outside of the chassis.

[0040] The computing device provided in this application embodiment has an axial fan that is not easily reversed, which can ensure the heat dissipation effect of the computing device. Furthermore, it can better balance the economic benefits of the computing device and improve the reliability of the computing device operation.

[0041] In one possible implementation, the computing device further includes a backplane, which is installed in the connection cavity. Node modules are plugged into one side of the backplane and electrically connected to it, and fan modules are plugged into the other side of the backplane and electrically connected to it. The two sides of the backplane are arranged opposite to each other in the thickness direction of the backplane.

[0042] Using the above solution, the backplane enables communication between the node module and the fan module, and can connect the fan module according to actual usage requirements to achieve energy saving of the computing device.

[0043] In one possible implementation, the computing device further includes a management module mounted in the chassis, with the node module and fan module communicatively connected to the management module. When a computing node plugged into the backplane is installed in the first mounting cavity, the management module controls the corresponding axial fan to power on and rotate forward; when no computing node plugged into the backplane is installed in the first mounting cavity, the management module controls the corresponding axial fan to power off.

[0044] By adopting the above scheme, the management module communicates with the node module and the fan module in real time, which facilitates the monitoring and control of the operation of each module and unit, improves the manageability, reliability and security of the computing device, and helps to reduce operation and maintenance costs.

[0045] In one possible implementation, each axial fan assembly includes a plurality of axial fans arranged sequentially in a third direction, and each second mounting cavity includes a plurality of sub-mounting cavities arranged sequentially in a third direction. The multiple sub-mounting cavities are correspondingly arranged with the multiple axial fans, and each axial fan of the axial fan assembly is installed in its corresponding sub-mounting cavity. The third direction is perpendicular to both the first and second directions.

[0046] By adopting the above solution, the axial fans running in the computing device can be better installed and arranged, the computing device can be cooled in a targeted manner, and the management and maintenance of the fans can be facilitated.

[0047] In one possible implementation, the computing device is a server, the end of the first cavity away from the connecting cavity constitutes the air inlet of the chassis, and the end of the second cavity away from the connecting cavity constitutes the air outlet of the chassis. Attached Figure Description

[0048] Figure 1a This is a three-dimensional structural diagram of the computing device according to an embodiment of this application;

[0049] Figure 1b This is a schematic diagram of the structure of the computing device according to an embodiment of this application;

[0050] Figure 1c for Figure 1b A view along the middle AA;

[0051] Figure 2a This is a schematic diagram of the air duct routing of the computing device in an embodiment of this application;

[0052] Figure 2b This is a schematic diagram of the air duct of the computing device in an embodiment of this application;

[0053] Figure 3 A schematic diagram of the air duct of a computing device that uses a common axial fan;

[0054] Figure 4 This is an exploded structural diagram of the axial fan according to an embodiment of this application;

[0055] Figure 5 This is a cross-sectional schematic diagram of an axial fan according to an embodiment of this application;

[0056] Figure 6 This is a schematic diagram showing the fit between the axial fan and the limiting structure in an embodiment of this application;

[0057] Figure 7 This is a schematic diagram of one embodiment of the limiting groove of the first structural component in the axial fan of this application;

[0058] Figure 8 This is a schematic diagram of one embodiment of the groove in the second structural component of the axial fan in this application;

[0059] Figures 9a-9c This is a partial schematic diagram illustrating the implementation of the limiting structure in the axial flow fan according to an embodiment of this application;

[0060] Figure 10 This is a schematic diagram of another embodiment of the limiting groove in the limiting structure of the axial flow fan in this application;

[0061] Figure 11 This is a schematic diagram of another embodiment of the limiting groove of the first structural component in the axial fan of this application.

[0062] Explanation of reference numerals in the attached figures:

[0063] Reference technology:

[0064] 100', Computing equipment;

[0065] 1' Chassis; 141' First cavity; 142' Connecting cavity; 143' Second cavity;

[0066] 5' Fan module; 51' Axial fan assembly;

[0067] This application:

[0068] 100. Computing equipment;

[0069] 1. Chassis; 111. Horizontal panel; 112. Vertical panel; 113. Rear panel; 114. Front panel;

[0070] 121. Air inlet of the chassis; 122. Air outlet of the chassis;

[0071] 131. Front-end; 132. Back-end;

[0072] 141. First cavity; 1411. First mounting cavity; 1412. Air inlet; 1413. Air outlet; 1414. First insert plate; 142. Connecting cavity; 143. Second cavity; 1431. Second mounting cavity; 1432. Second insert plate;

[0073] 15. Backplate; 151. Ventilation holes;

[0074] 16. Connectors;

[0075] 2. Node module; 21. Compute node;

[0076] 3. Management module; 4. Power supply module;

[0077] 5. Fan module; 51. Axial fan assembly;

[0078] 6. Axial fan; 61. Housing; 611. Cylinder; 6111. First end; 6112. Second end; 612. Base; 613. Inlet side flange; 614. Exhaust side flange; 615. Support rib;

[0079] 62. Motor; 621. Stationary part; 6211. Bearing retainer; 6212. Stator;

[0080] 622, Moving part; 6221, Rotor; 6222, Shaft; 6223, Shaft fixing component;

[0081] 623. Bearing assembly; 6231. Fixed part; 6232. Rotating part;

[0082] 63. Impeller; 631. Blade; 6311. Leading edge; 6312. Trailing edge; 632. Base wheel;

[0083] 64. Air inlet; 65. Air outlet;

[0084] 71. First structural component; 711. Limiting surface; 712. Limiting groove; 7121. Groove bottom; 7122. Groove opening;

[0085] 713. Limiting structure; 7131. Limiting component; 7132. One end; 7133. The other end; 7134. Elastic component;

[0086] 72. Second structural component; 721. Limiting surface; 722. Concave and convex surfaces;

[0087] 723, groove; 7231, slot opening; 7232, slot bottom;

[0088] 7233, First groove wall; 7233a, First edge; 7233b, Second edge;

[0089] 7234, Second groove wall; 7234a, First edge; 7234b, Second edge;

[0090] 724. Protrusion;

[0091] Y, first direction; Z, second direction; X, third direction;

[0092] J1, First Axis. Detailed Implementation

[0093] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application will be presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0094] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0095] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0096] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0097] In the description of the embodiments of this application, it should be noted that the mutual perpendicularity in the embodiments of this application is not absolute perpendicularity. Approximate perpendicularity due to processing errors and assembly errors (e.g., the included angle between two structural features is 89.9°) is also within the range of mutual perpendicularity in the embodiments of this application. Similarly, the mutual parallelism in the embodiments of this application is not absolute parallelism. Approximate parallelism due to processing errors and assembly errors (e.g., the included angle between two structural features is 0.1°) is also within the range of mutual parallelism in the embodiments of this application. The axial symmetry in the embodiments of this application is not absolute axial symmetry. Approximate axial symmetry due to processing errors and assembly errors (e.g., a portion of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the range of axial symmetry in the embodiments of this application. The central symmetry in the embodiments of this application is not absolute central symmetry. Approximate central symmetry due to processing errors and assembly errors (e.g., a portion of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the range of central symmetry in the embodiments of this application. The embodiments of this application do not impose specific limitations on this.

[0098] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0099] Current computing devices, by integrating multiple computing nodes, can solve highly complex scientific and engineering problems. These computing nodes can be any one or more of a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). However, as the computing power of computing nodes increases, the power consumption of high-power modules (such as CPUs and GPUs) also increases. To ensure stable operation, the back end of computing devices is typically equipped with fan walls for effective heat dissipation. These fan walls consist of multiple axial fans that expel heat from the inside of the computing device. Considering the economic efficiency of computing devices, most support hot-swapping of nodes. This means that when certain computing nodes are not installed inside the computing device, the power to the axial fans in those areas can be turned off to reduce energy consumption and optimize heat dissipation efficiency. However, if the axial fans in the areas where the computing nodes are operating normally are running, the accelerated airflow can cause unpowered axial fans to reverse, resulting in some heat flowing back into the computing device, affecting the overall heat dissipation of the computing device.

[0100] To address the aforementioned issues, this application provides an axial fan. By setting a limiting structure, the axial fan is less prone to reverse rotation. In computing devices, the axial fan located in an unpowered area will not carry heat from outside the computing device chassis back inside, ensuring the cooling effect of the computing device. Furthermore, it can better balance the economic benefits of the computing device and improve the reliability of its operation.

[0101] This application also provides a computing device that utilizes this axial fan, which ensures effective heat dissipation while balancing economic efficiency and improving operational reliability. It should be noted that the specific type of computing device is not limited; it can be common computing devices such as servers, mainframes, supercomputers, and storage devices. The basic structure of the computing device is illustrated below using a blade server as an example.

[0102] Please see Figures 1a-1c , Figure 1a This is a three-dimensional structural diagram of the computing device according to an embodiment of this application. Figure 1b This is a schematic diagram of the structure of the computing device according to an embodiment of this application. Figure 1c for Figure 1b The view along line AA. It should be noted that... Figures 1a-1c This is for illustrative purposes only and is intended to illustrate the basic architecture of a computing device. The structure and placement of the components do not impose limitations on the actual product. Furthermore, the actual product may include more or fewer components than those shown in the illustration.

[0103] like Figures 1a-1c As shown, the computing device 100 may include a chassis 1, node modules 2 mounted on the chassis 1, and fan modules 5. Infrastructure components, such as fan modules 5, power modules 4 (described below), and network switches, are shared by the computing nodes 21 within node modules 2. The assembly method of each module with the chassis 1 is not limited. In one example, node modules 2, fan modules 5, management modules 3 (mentioned below), and power modules 4 can each be modularly designed as independent units and then fixedly connected to the chassis 1 for easy disassembly and maintenance, improving production efficiency.

[0104] like Figure 1a and Figure 1b As shown, the chassis 1 includes a horizontal wall panel 111 and a vertical wall panel 112. When the computing device 100 is placed horizontally on the ground, the horizontal wall panel 111 refers to the wall panels forming the top and bottom of the chassis 1, and the vertical wall panel 112 refers to the wall panels forming the left and right sides of the chassis 1. In one possible implementation, the chassis 1 may also include a rear wall panel 113, which refers to the rear side wall panel forming the chassis 1. Here, "rear side" can be understood as the side away from the user, or the side away from the node module 2.

[0105] It should be noted that the computing device 100 may not include a rear wall panel 113, and this embodiment of the application does not impose any restrictions on this. In one example, the rear wall panel 113 may only have a small portion and does not need to completely cover the rear side.

[0106] Furthermore, the chassis 1 may be equipped with a front panel 114 as needed, or it may be omitted to facilitate the installation of the node module 2; this embodiment does not impose any restrictions on this. In one possible implementation, such as... Figure 1b As shown, the chassis 1 is provided with a front wall panel 114. Those skilled in the art can install the front wall panel 114 after arranging the components (e.g., node modules 2) inside the chassis 1, thereby providing better protection for the components inside the chassis 1.

[0107] It should be noted that those skilled in the art can select the quantity and material of each wall panel according to actual needs, and the embodiments of this application do not impose any restrictions on this.

[0108] In one possible implementation, the chassis 1 is configured to provide good protection, possessing strong dustproof and waterproof capabilities. This effectively prevents dust, particles, and liquids from entering the chassis 1, protecting the server and communication equipment from external damage and interference, ensuring the server maintains stable performance and operates safely even in harsh environments. To resist external impacts and vibrations, reinforcement and shockproof mechanisms can also be installed in the chassis 1. The specific design can be selected according to actual needs, and this embodiment does not impose any limitations on this.

[0109] like Figure 1a and Figure 1b As shown, the chassis 1 is equipped with an air inlet 121 and an air outlet 122, allowing outside air to circulate with the air inside the chassis 1, thereby dissipating heat from the inside of the chassis 1. The air inlet 121 is located at the front end 131 of the chassis 1, and the air outlet 122 is located at the rear end 132 of the chassis 1. Generally, the node module 2 is inserted into the chassis 1 from the front end 131 as needed, and the fan module 5 is located at the rear end 132 of the chassis 1. During operation, the node module 2 generates a large amount of heat. Cooler airflow from outside the chassis 1 can enter the chassis 1 through the air inlet 121 at the front end 131, and under the action of the fan module 5, exchange heat. The warmer airflow is then drawn out of the chassis 1 through the air outlet 122 at the rear end 132, achieving a cooling effect.

[0110] like Figure 1b As shown, the chassis 1 comprises a first cavity 141, a connecting cavity 142, and a second cavity 143, which are sequentially arranged and connected along a first direction Y. The first cavity 141 includes a plurality of first mounting cavities 1411 arranged sequentially along a second direction Z. The first direction Y is perpendicular to the second direction Z. Each first mounting cavity 1411 has an air inlet 1412 at one end and an air outlet 1413 at the other end, and communicates with the connecting cavity 142. Furthermore, the plurality of first mounting cavities 1411 are interconnected through their respective air outlets and the connecting cavity 142. The second cavity 143 includes a plurality of second mounting cavities 1431 arranged sequentially along the second direction.

[0111] It should be noted that the first direction Y can be the depth direction of the chassis 1 when it is placed horizontally, and the second direction Z can be the height direction of the chassis 1 when it is placed horizontally. This application embodiment does not limit this. Specifically, the front end 131 and the rear end 132 of the chassis 1 can be understood as the two ends of the chassis 1 in the first direction Y, and the first cavity 141 is located at the front end 131 of the chassis 1, and the second cavity 143 is located at the rear end 132 of the chassis 1.

[0112] It is understandable that the first cavity 141 is provided with multiple first mounting cavities 1411, and the air inlets 1412 of these first mounting cavities 1411 together constitute the air inlet 121 of the chassis.

[0113] Furthermore, in one possible implementation, the first cavity 141 can be used to arrange the node module 2, and the second cavity 143 can be used to arrange the fan module 5. The specific structures of the node module 2 and the fan module 5 will be explained below with reference to the accompanying drawings. It should be noted that in other possible implementations, the first cavity 141 can also be used to arrange the node module 2 and the management module 3, and the second cavity 143 can be used to arrange the fan module 5, the power supply module 4, etc. The embodiments of this application do not limit this.

[0114] Furthermore, in one possible implementation, such as Figure 1b As shown, the computing device 100 is a server (e.g., a blade server). The end of the first cavity 141 away from the connecting cavity 142 constitutes the air inlet 121 of the chassis, and the end of the second cavity 143 away from the connecting cavity 142 constitutes the air outlet 122 of the chassis. This ensures that the cooling airflow outside the chassis 1 enters from the air inlet 121 of the chassis and is finally discharged from the air outlet 122 of the chassis, thereby achieving heat dissipation inside the chassis 1.

[0115] like Figure 1a and Figure 1b As shown, the chassis 1 is also provided with a socket plate, which can partition the space as needed for arranging node modules 2, power supply modules 4, fan modules 5, etc. In one possible implementation, a plurality of first socket plates 1414 arranged sequentially in the second direction Z are provided in the first cavity 141 of the chassis 1, and two spaced first socket plates 1414 and the vertical wall panels 112 on both sides of the chassis 1 form a first mounting cavity 1411, or the first socket plates 1414, the vertical wall panels 112 on both sides of the chassis 1 and the horizontal wall panel 111 on one side of the chassis 1 form a first mounting cavity 1411.

[0116] It should be noted that the number of the first insert plate 1414 is not limited in this application embodiment, and can be 1, 2, 3, etc. Those skilled in the art can set it according to the number of the first mounting cavity 1411.

[0117] Furthermore, the insertion board can be either a horizontal or vertical insertion board, and this application embodiment does not limit this. It should be noted that a horizontal insertion board refers to an insertion direction parallel to the plane when the chassis 1 is placed on a flat surface; or, in other words, the horizontal insertion board is approximately parallel to the horizontal wall panels 111 on both sides of the chassis 1. In one example, the horizontal insertion board can be the first insertion board 1414. A vertical insertion board refers to an insertion direction perpendicular to the plane when the chassis 1 is placed on a flat surface; or, in other words, the vertical insertion board is approximately parallel to the vertical wall panels 112 on both sides of the chassis 1. The specific structure of the first insertion board 1414 will be described later in conjunction with the arrangement of the node module 2.

[0118] In other possible implementations, a second insert board 1432 is also provided inside the second cavity 143 of the chassis 1. The second insert board 1432 can be equipped with multiple functional modules (not shown in the figure), such as I / O port modules and optical modules, or... Figure 1b As shown, a fan module 5 can be arranged on the second insertion plate 1432. Correspondingly, the second insertion plates 1432 are arranged sequentially in the second direction Z. The spaced-apart second insertion plates 1432 can form a second mounting cavity 1431 with the vertical wall panels 112 on both sides of the chassis 1. Those skilled in the art will understand that the number and position of the second insertion plates 1432 can be specifically set according to operational needs, and the embodiments of this application do not limit this.

[0119] It should be noted that the method of fixing the plug-in board to chassis 1 is not limited. In one possible implementation, the plug-in board is fixedly connected to chassis 1, meaning it cannot be removed from chassis 1. This eliminates the need for plug-in board installation when installing module devices, simplifying the usage process. In other possible implementations, the plug-in board is detachably connected to chassis 1. This allows for higher space utilization within chassis 1, more flexible design and installation, and easier maintenance and upgrades.

[0120] like Figure 1b As shown, the chassis 1 may also include a backplate 15. In one possible implementation, the backplate 15 is installed within the connection cavity 142, and the node module 2 is inserted into one side of the backplate 15 and electrically connected to it. The fan module 5 is inserted into the other side of the backplate 15 and electrically connected to it. The backplate 15 is positioned opposite to each other in the thickness direction, enabling communication between the backplate 15, the node module 2, and the fan module 5.

[0121] It should be noted that some computing nodes 21 in node module 2 can be plugged into one side of backplate 15 and electrically connected to backplate 15, or all computing nodes 21 in node module 2 can be plugged into one side of backplate 15 and electrically connected to backplate 15. The backplate 15 disposed within the connection cavity 142 can be one or multiple pieces; this embodiment does not limit this. Further, some axial fans 6 in fan module 5 can be plugged into the other side of backplate 15 and electrically connected to backplate 15, or all axial fans 6 in fan module 5 can be plugged into the other side of backplate 15 and electrically connected to backplate 15; this embodiment does not limit this. Further, the specific structure of backplate 15 is not limited. In one possible implementation, such as... Figure 1b and Figure 1c As shown, the backplate 15 is provided with heat dissipation holes 151 or heat dissipation slots. The attached figure is for illustrative purposes only, allowing air to circulate between the first cavity 141 and the second cavity 143 inside the chassis 1. It should be noted that the size, shape, and specific number of heat dissipation holes 151 and heat dissipation slots are not limited in the embodiments of this application. For example, the larger the entire computing device 100, the more heat dissipation holes 151 and heat dissipation slots there are, or the larger the size of the heat dissipation holes 151 and heat dissipation slots are.

[0122] Furthermore, the connection method between the backplate 15 and the chassis 1 is not limited. In one possible implementation, the backplate 15 is detachably connected to the chassis 1, i.e., the two are separate structures. Specifically, the backplate 15 and the chassis 1 can be connected by bolts, snap-fit ​​connections, hinges, etc. Those skilled in the art will understand that the connection methods between the backplate 15 and the chassis 1 include, but are not limited to, the connection methods mentioned above. In another possible implementation, the backplate 15 and the chassis 1 are not detachable, i.e., the two are an integrated structure. The backplate 15 and the chassis 1 can be connected by integrated design, fixed riveting, and other processing techniques. Those skilled in the art will understand that the connection methods between the backplate 15 and the chassis 1 include, but are not limited to, the processing techniques mentioned above.

[0123] It should be noted that in one possible implementation, such as Figure 1b As shown, the backplate 15 has certain gaps with each wall in the connecting cavity 142, which allows airflow to pass through, thereby ensuring that the airflow inside the chassis 1 can flow quickly and improving the heat dissipation effect of the computing device 100.

[0124] like Figure 1a and Figure 1bAs shown, the node module 2 includes at least one computing node 21 for storing and processing information data. It should be noted that the number of computing nodes 21 in the node module 2 (which may include one or more computing nodes 21, wherein different computing nodes 21 can be electrically connected to each other via a backplane 15) and their installation positions are not limited. The specific number of computing nodes 21 can be determined according to the stacking specifications of the computing device 100. The larger the computing device 100, the more computing nodes 21 can be installed, and their installation positions can also be staggered.

[0125] The computing node 21 can be an independent computing unit, for example, it can include a CPU, memory, storage devices, and network interfaces. In one possible implementation, such as... Figure 1a and Figure 1b As shown, the computing node 21 is a blade-type system motherboard, and each computing node 21 is installed in the corresponding first mounting cavity 1411 in the first cavity 141. That is to say, the computing node 21 in the first mounting cavity 1411 can be fixed on the corresponding first insert plate 1414, thereby supporting and stabilizing the computing node 21 through the first insert plate 1414 to ensure its stable operation.

[0126] It should be noted that computing nodes 21 may be installed in all the first mounting cavities 1411 of the first cavity 141, or computing nodes 21 may be installed in a part of the first mounting cavities 1411 and in another part of the first mounting cavities 1411. This application embodiment does not limit this.

[0127] It should be noted that the specific structure of the first insert plate 1414 is not limited in the embodiments of this application. In one example, the first insert plate 1414 is provided with multiple openings, and a part of the first insert plate 1414 can be fixed without contact with the computing node 21. That is, the first insert plate 1414 is a support plate with a trapezoidal structure. This can ensure that the insert plate reliably supports the computing node 21 while taking into account the heat dissipation requirements of the computing node 21. This allows the cooling airflow to partially and directly contact the computing node 21 during the flow process, thereby achieving heat exchange and improving heat dissipation efficiency.

[0128] It should be noted that there are certain gaps between the computing nodes 21 and the various walls within the first mounting cavity 1411, allowing cooling airflow to pass through and forming air ducts. This ensures that each computing node 21 can dissipate heat in real time, thereby ensuring the heat dissipation effect of the computing device 100. The formation of the air ducts in the computing device 100 will be explained in detail below with reference to the accompanying drawings.

[0129] In other possible implementations, the computing node 21 can also be a blade-type PCB board. The computing node 21 can also be vertically inserted into the horizontal wall plate 111 of the chassis 1 near the placement plane. Alternatively, part of the computing node 21 can be vertically inserted and part can be horizontally inserted. This application embodiment does not limit this, and those skilled in the art can make specific settings according to actual needs.

[0130] At this time, computing node 21 can be plugged into backplane 15 via connector 16. Furthermore, connector 16 is also provided inside chassis 1 for establishing telecommunication connections between computing nodes 21 and between computing nodes 21 and other modules. In one possible implementation, such as... Figure 1b As shown, each computing node 21 in the first cavity 141 can be plugged into the backplane 15 via connector 16.

[0131] It should be noted that the embodiments of this application do not limit the number and specifications of the connectors 16, and those skilled in the art can select them according to the number and specifications of the nodes. In one possible implementation, the connector 16 can be a high-density connector. In other possible implementations, the connector 16 can be a power connector.

[0132] It should be noted that the various modules within the computing device 100 can be connected via a backplane 15 or via cables, and this embodiment does not impose any restrictions on this.

[0133] The preceding text mainly described the possible structure of the chassis 1 in the computing device 100 and the arrangement of the computing nodes 21. The following text will introduce other possible modules and devices in the computing device 100.

[0134] like Figure 1a and Figure 1c As shown, the computing device 100 may further include a management module 3. The node module 2 and the fan module 5 are communicatively connected to the management module 3. Specifically, the management module 3 can distribute information flow and power to the node module 2 and the fan module 5 through corresponding signal connectors and power connectors, supporting remote monitoring and control of the various functions of the computing device 100.

[0135] Furthermore, the computing device 100 may also include a power supply module 4, which provides power to the management module 3, the node module 2, and the fan module 5.

[0136] It should be noted that in other possible implementations, both node module 2 and fan module 5 can be configured with their own power supplies, and can also establish a telecommunications connection with power supply module 4 at the same time. This application embodiment does not limit this.

[0137] It should be noted that the placement of the management module 3 and the power supply module 4 is not limited. In one possible implementation, the management module 3 and the power supply module 4 are installed at the rear end 132 of the chassis 1, and are respectively positioned on both sides of the fan module 5 in the third direction X, which can improve the space utilization inside the chassis 1. It should be noted that the third direction X is perpendicular to the first direction Y and the second direction Z.

[0138] Furthermore, in one example, when a computing node 21 connected to the backplane 15 is installed in the first mounting cavity 1411, the management module 3 controls the corresponding axial fan 6 (which can be understood as an axial fan 6 positioned opposite the first mounting cavity 1411 in the first direction Y) to be powered on and rotate forward (forward rotation can be understood as rotating in the forward direction). When some of the first mounting cavities 1411 are not equipped with computing nodes 21 connected to the backplane 15, the management module 3 can control the axial fan 6 in the corresponding area where no computing node 21 is installed to be powered off, or it can continue to be powered on; this embodiment does not impose any restrictions on this. In this way, the fan module 5 can be collectively managed through the management module 3 without the need to set the on / off state of individual axial fans 6. It also facilitates the monitoring and control of the operation of each module and unit, improving the manageability, reliability, and security of the computing device 100, and helping to reduce operating costs. The forward rotation of the axial fan 6 will be uniformly explained below.

[0139] It should be noted that the communication method between management module 3 and fan module 5 is not limited. In one possible implementation, the communication between management module 3 and fan module 5 can be wireless, such as Bluetooth. In other possible implementations, the communication between management module 3 and fan module 5 can be wired. In one example, fan module 5 can communicate with management module 3 through backplane 15.

[0140] The following section will introduce the fan module 5 in the computing device 100. It is understandable that by installing the fan module 5 inside the chassis 1, the computing device 100 can be cooled and dissipated, preventing malfunctions and performance degradation caused by overheating. It also avoids the problems of excessive weight and space occupation of the chassis 1 due to the need for heat dissipation through its body, reducing the material and size requirements of the chassis 1. While improving the heat dissipation performance of the chassis 1, it also helps extend the lifespan of the computing device 100 and improve its operating efficiency.

[0141] like Figures 1a-1cAs shown, the fan module 5 includes multiple axial fan groups 51, which are arranged sequentially in the second direction Z and correspond to multiple second mounting cavities 1431. Each axial fan group 51 is installed in its corresponding second mounting cavity 1431 and includes at least one axial fan 6. In other words, the fan module 5 forms a fan wall at the rear end 132 of the chassis 1, better guiding hot air inside the chassis 1 to be exhausted from the exhaust vent 122. Furthermore, the axial fan 6 can generate a large airflow at a low speed while maintaining a low noise level. This is crucial for the environment of the computing device 100, which requires efficient heat dissipation in a confined space and is sensitive to noise. Moreover, its simple structure, small size, and ease of maintenance have led to its widespread use in computing devices 100, providing an effective heat dissipation solution for high-density computing environments. The specific structure of the axial fan 6 will be explained in more detail later.

[0142] It should be noted that the embodiments of this application do not limit the number of axial fan groups 51 in the fan module 5. In one possible implementation, such as Figure 1b As shown, each axial fan assembly 51 corresponds to one computing node 21. That is, there is a one-to-one correspondence between the second mounting cavity 1431 where each axial fan assembly 51 is arranged and the first mounting cavity 1411 where the computing node 21 is arranged, so as to achieve a good exhaust and heat dissipation effect. In other possible implementations, one axial fan assembly 51 can correspond to multiple computing nodes 21. In one example, one axial fan assembly 51 can correspond to multiple computing nodes 21 within one first mounting cavity 1411. In another example, one axial fan assembly 51 can correspond to multiple computing nodes 21 within multiple first mounting cavities 1411. In this case, the power and airflow speed of the axial fan assembly 51 are relatively large, which can meet the heat dissipation requirements of the corresponding computing node 21.

[0143] like Figures 1a-1c As shown, each axial fan assembly 51 includes a plurality of axial fans 6 arranged sequentially in a third direction X, and each second mounting cavity 1431 includes a plurality of sub-mounting cavities arranged sequentially in a third direction X. The plurality of sub-mounting cavities are correspondingly arranged with the plurality of axial fans 6, and each axial fan 6 of the axial fan assembly 51 is installed in its corresponding sub-mounting cavity. In this way, the axial fans 6 operating in the computing device 100 can be better installed and arranged, the computing device 100 can be cooled in a targeted manner, and the management and maintenance of the fans are also facilitated.

[0144] It should be noted that the embodiments of this application do not limit the number or specifications of the axial fans 6 in the axial fan assembly 51. Those skilled in the art can select the appropriate axial fans 6 based on the heat dissipation requirements of the computing device 100. In one possible implementation, such as... Figure 1aAs shown, each axial fan group 51 has two axial fans 6 arranged in the first direction Y. In other possible implementations, such as Figure 1b As shown, each axial fan group 51 has one axial fan 6 in the first direction Y.

[0145] Furthermore, in the fan module 5, the air inlet 64 of each axial fan 6 is positioned opposite to the air outlet 1413 of at least one first mounting cavity 1411 in the first direction Y, and the air outlet 65 of each axial fan 6 faces the outside of the chassis 1. This can be understood as the air outlets 65 of each axial fan 6 collectively forming the air outlet 122 of the chassis, thereby achieving heat dissipation for the computing device 100 and ensuring its stable operation.

[0146] The above mainly introduced the basic structure of the computing device 100. Considering that the node module 2 in the computing device 100 generates a lot of heat under high power consumption, it is necessary to meet its heat dissipation requirements to ensure the stable operation of the computing device 100. Therefore, the following text will describe the heat dissipation system of the computing device 100.

[0147] Currently, common heat dissipation methods for large computing devices 100 include air cooling and liquid cooling. In one possible implementation, the backplate 15 of the chassis 1 can be configured as a liquid-cooled backplate 15, integrating the heat dissipation system into the rear end 132 of the computing device 100, and utilizing a copper tube aluminum fin heat exchanger for efficient heat dissipation. It should be noted that this application embodiment does not limit the specific implementation of the liquid cooling technology in the computing device 100, and will not elaborate on it further below.

[0148] The following section will explain the air-cooling technology in conjunction with the accompanying diagram.

[0149] Please see Figure 2a and Figure 2b , Figure 2a This is a schematic diagram of the air duct routing of the computing device in an embodiment of this application. Figure 2b This is a schematic diagram of the airflow path of the computing device according to an embodiment of this application. It should be noted that the dashed lines in the figure represent the path of airflow. Those skilled in the art will understand that the dashed lines in the figure are only for illustration and represent the main direction of airflow, and do not limit the actual airflow direction of the computing device.

[0150] Air cooling technology uses axial fan 6 to expel hot air from inside chassis 1, accelerating the flow of hot air and thus helping compute node 21 dissipate heat more effectively. For example... Figure 2aAs shown, a fan module 5 is provided at the rear end 132 of the computing device 100. When the computing device 100 is running, a large amount of heat generated by the node module 2 fills the inside of the chassis 1. At this time, the axial fan 6 can rotate normally when powered on, that is, rotate in the forward direction, driving the hot airflow inside the chassis 1 to be discharged to the outside of the chassis 1. In other words, affected by the rotation of the axial fan 6, the airflow speed inside the chassis 1 is accelerated, so that the cooling airflow outside the chassis 1 continuously enters the chassis 1 from the air inlet 121 of the chassis for heat exchange, and draws the air inside the chassis 1 out of the chassis 1, thereby continuously dissipating the heat from the chassis 1.

[0151] Specifically, such as Figure 2a As shown, the large amount of heat generated by the computing node 21 inside the chassis 1 will exchange heat with the air inside the chassis 1, filling the gap between the computing node 21 and the first mounting cavity 1411. Some of the heat will also be transferred to the first insert plate 1414 and the wall panels around the computing node 21. When the fan module 5 is working, a low-pressure area will be formed on the side of the rear end 132 of the chassis 1 near the air inlet of the axial fan 6, making the air pressure in the first cavity 141 and the connecting cavity 142 of the chassis 1 higher. This accelerates the airflow in the first cavity 141 and the connecting cavity 142 towards the area where the fan module 5 is located, so that the cooling airflow outside the chassis 1 will also continuously enter the chassis 1. This part of the entering cooling airflow will exchange heat with each computing node 21, the wall panels, and the insert plate in the first cavity 141. Through the action of the fan module 5, it will be continuously discharged into the chassis 1, thereby reducing the temperature inside the chassis 1 and ensuring the stable operation of the computing node 21.

[0152] like Figure 2a As shown, the cooling airflow enters the first cavity 141 from the air inlet 121 of the chassis, passes through the gap between the first mounting cavity 1411 and the computing node 21, and continuously exchanges heat, accelerating the airflow to the connecting cavity 142. It then passes through the gap between the back plate 15 and the wall plate, as well as the heat dissipation holes 151 and heat dissipation slots on the back plate 15, and enters the fan module 5. Through the action of the axial fans 6, the hot airflow is discharged from the air outlet 65 of each axial fan 6 to the chassis 1, thereby achieving heat dissipation of the computing device 100 and ensuring the stable operation of the computing device 100.

[0153] It should be noted that the above is merely an exemplary description of the scenario in which the fan module 5 is used as a heat dissipation system in the computing device 100, and does not constitute a specific limitation on the usage scenario of the embodiments of this application.

[0154] Currently, most large-scale computing devices support hot-swapping of compute nodes, meaning that compute nodes can be inserted or removed without shutting down the system power (i.e., while the computing device is running normally) without causing any impact or damage to the entire computing system. Considering the economic efficiency of large-scale computing devices, when a compute node is removed, the cooling fan at that compute node is turned off. Since the axial fans of other compute nodes inside the chassis draw air, the internal pressure of the chassis decreases, which can easily cause the axial fans in the corresponding fan group to reverse (i.e., rotate in the opposite direction), bringing heat that was just conducted out of the chassis back inside, which is detrimental to the system's heat dissipation. Alternatively, when some compute nodes are removed, to limit the reverse rotation of the axial fans in that area, the axial fans in that area are kept powered on, causing them to rotate forward, preventing external heat from entering the chassis and ensuring system heat dissipation. However, continuously powering the axial fans in areas without compute nodes is detrimental to the energy efficiency of the computing device. The following will illustrate the problems caused by reverse rotation of axial fans in computing devices with reference to the accompanying drawings.

[0155] Please see Figure 3 , Figure 3 This is a schematic diagram of the airflow in a computing device that uses a common axial fan. It should be noted that... Figure 3 This diagram is for illustrative purposes only and is intended to illustrate the basic architecture of a computing device. The structure and placement of the components do not impose limitations on the actual product. Furthermore, the actual product may include more or fewer components than those illustrated in the diagram. It should be noted that the dashed lines in the diagram represent airflow paths. Those skilled in the art will understand that the dashed lines are merely illustrative, indicating the main direction of airflow and do not limit the actual airflow direction of the computing device.

[0156] like Figure 3 As shown, each axial fan group 51' in the fan module 5' is arranged corresponding to at least one computing node 21' (e.g., each axial fan group 51' is arranged corresponding to at least one computing node 21') to ensure the overall heat dissipation effect of the computing device 100'. In one example, when some computing nodes 21' in the computing device 100' are removed from the chassis 1', in order to ensure the heat dissipation effect of the computing device 100', the axial fans 6' in the areas where no computing nodes 21' are set will continue to be powered, which is not conducive to the energy-saving design of the computing device 100'.

[0157] In another example, when some computing nodes 21' in computing device 100' are removed from chassis 1', the corresponding axial fan group 51' in fan module 5' will be shut down, meaning that the axial fans 6' in the corresponding axial fan group 51' will not be powered. Specifically, as shown... Figure 3As shown, when the computing node 21' located on the upper three layers is removed from the chassis 1', the axial fan assembly 51' on the upper three layers, i.e., each axial fan 6' in the axial fan assembly 51' on the upper three layers, is not powered on. At this time, the axial fan assembly 51' on the lower three layers is working normally and rotating in the forward direction, accelerating the expulsion of hot air from inside the chassis 1'. Since the first cavity 141', connecting cavity 142', and second cavity 143' within the chassis 1' of computing device 100' are interconnected, the air pressure inside the connecting cavity 142' and the first cavity 141' will be lower than the air pressure at the front end 131' of chassis 1' due to the action of the three normally operating axial fan groups 51' in the lower layers. Furthermore, the air pressure inside the connecting cavity 142' and the first cavity 141' will also be lower than the air pressure at the rear end 132' of chassis 1'. As a result, the axial fan groups 51' in the upper three layers (the axial fan groups 51' that are not powered) will reverse due to the pressure of the air pressure at the rear end 132' of chassis 1'. This reversal can be understood as the direction of reversal being exactly opposite to the direction of forward rotation. This causes the hot airflow expelled from inside chassis 1' by the axial fan groups 51' in the lower three layers to be partially drawn back into chassis 1' under the reversal action of the axial fan groups 51' in the upper three layers, thus failing to achieve a good heat dissipation effect.

[0158] Based on this, embodiments of this application provide an axial fan. By designing a limiting mechanism (including the limiting structure and concave-convex surface mentioned below), the axial fan is less prone to reverse rotation. Therefore, in the heat dissipation system of computing devices, such as... Figure 2b As shown, the axial fan 6 in the fan module 5, when normally powered on, exhausts hot air from inside the chassis 1. In the corresponding area where the axial fan 6 is not powered on, because the axial fans 6 in this axial fan group 51 are not easily reversed, they do not carry the hot air from outside the chassis 1 back into the chassis 1. This ensures the heat dissipation effect of the computing device 100 and also better balances the economic benefits of the computing device 100 (e.g., it helps to achieve energy saving of the computing device 100) and improves the reliability of the computing device 100. The basic structure of the axial fan 6 will be described in detail below with reference to the accompanying drawings.

[0159] Please see Figure 4 and Figure 5 , Figure 4 This is an exploded view of the axial fan according to an embodiment of this application. Figure 5 This is a cross-sectional schematic diagram of an axial flow fan according to an embodiment of this application. It should be noted that... Figure 4 and Figure 5 The rotation direction shown is the forward rotation direction of the axial fan. Those skilled in the art will understand that the forward rotation direction of the axial fan is related to design requirements, and the actual structure of the axial fan can be specifically set according to actual needs.

[0160] like Figure 4 and Figure 5As shown, the axial fan 6 includes a housing 61, an impeller 63, and a motor 62. Specifically, the housing 61 is the outer casing of the axial fan 6, used to protect the impeller 63 and the motor 62. It also serves as a replaceable unit for securing other components in the axial fan 6 and facilitates the fixed connection of the axial fan 6 to the chassis 1, thereby forming a complete heat dissipation airflow with the chassis 1, and provides replaceable and maintainable functionality.

[0161] The outer casing 61 includes a cylindrical portion 611 and a base 612. The cylindrical portion 611 includes a first end 6111 and a second end 6112 disposed opposite to each other in the direction of the first axis J1. The base 612 is located within the opening formed by the first end 6111 and is connected to the first end 6111. An air inlet 64 is formed between the outer peripheral surface of the base 612 and the inner wall surface of the first end 6111. An air outlet 65 is formed around the inner wall surface of the second end 6112. The cylindrical portion 611 surrounds the outer peripheral side of the impeller 63, and the impeller 63 is rotatable relative to the outer casing 61 about the first axis J1.

[0162] In other words, the cylindrical portion 611 surrounds the radially outer side of the impeller 63, and the cylindrical portion 611 is a cylindrical body that extends along the first axis J1 from the first end 6111 to the second end 6112. The specific structure of the impeller 63 will be explained in detail later.

[0163] It should be noted that, in one possible implementation direction, the direction of the first axis J1 can be the flow direction of the airflow in the axial fan 6 from the air inlet 64 to the air outlet 65, or the direction of the first axis J1 can be parallel to the first direction in the computing device 100, or the direction of the first axis J1 can be the height direction of the axial fan 6, or the direction of the first axis J1 can be the height direction of the outer casing 61. The embodiments of this application do not limit this.

[0164] Specifically, this application embodiment does not limit the specific shape and size of the cylindrical portion 611. In one possible implementation, such as Figure 5 As shown, the cylindrical portion 611 is cylindrical, with its length in the direction of the first axis J1 slightly greater than the length of the impeller 63 in the same direction, and its diameter slightly greater than the diameter of the impeller 63. Those skilled in the art can reasonably configure this according to actual design requirements, ensuring that the housing 61 does not interfere with the rotation of the impeller 63, allowing airflow to pass quickly through the housing 61, and ensuring the structural reliability of the axial fan 6. In other possible implementations, the outer circumferential surface of the cylindrical portion 611 includes four outer planes cut by planes parallel to the first axis J1, with the outer planes evenly spaced in the circumferential direction. Alternatively, it can be understood that the outer planes are planes parallel to the first axis J1. This structure helps reduce the size of the housing 61, saving costs.

[0165] Furthermore, the extension path of the cylindrical portion 611 is not limited. In one possible implementation, the cylindrical portion 611 is in the shape of a straight cylinder in the direction of the first axis J1. In other possible implementations, the inner diameter of the cylindrical portion 611 near the first end 6111 is smaller than the inner diameter near the second end 6112. That is, the inner curved surface of the cylindrical portion 611 has a diameter that increases from small to large in the direction of the first axis J1. In this case, the airflow can be drawn out of the interior of the axial fan 6 more quickly, thereby improving its working efficiency.

[0166] In one possible implementation, the housing 61 further includes an intake-side flange 613 and an exhaust-side flange 614. In one example, the intake flange is disposed at the first end 6111 of the cylindrical portion 611, extending radially outward from the outer periphery of the cylindrical portion 611. The extension dimension and thickness of the intake flange are not limited. That is, as... Figure 4 and Figure 5 As shown, the intake flange is square when viewed in the direction of the first axis J1, and the length of one side is the inner diameter of the wall cylinder 611.

[0167] In one example, an exhaust flange is provided at the second end 6112 of the cylindrical portion 611, extending radially outward from the outer periphery of the cylindrical portion 611. The extension dimension and thickness of the exhaust flange are not limited. That is, as... Figure 4 and Figure 5 As shown, the exhaust flange is square-shaped when viewed along the first axis J1, with one side being the length of the inner diameter of the wall cylinder 611. Furthermore, when viewed along the first axis J1, the intake flange and the exhaust flange overlap; that is, their projections in the direction of the first axis J1 coincide. It should be noted that the projections of the intake flange and the exhaust flange in the direction of the first axis J1 may partially overlap or partially not overlap, and this embodiment does not impose any limitations on this.

[0168] Furthermore, such as Figure 4 and Figure 5 As shown, and in combination Figure 1b It is understood that the intake flange and exhaust flange are provided with openings for mounting and fixing the axial flow fans 6. In one example, the intake flange is generally square in shape, with an opening at each of its four corners for nuts to pass through. Specifically, the openings on the intake flange of one axial flow fan 6 can correspond to the openings on the intake flange of another axial flow fan 6, and the axial flow fans 6 can be fixed together by nuts and bolts. Alternatively, the axial flow fans 6 can also be fixed in the second mounting cavity 1431 through the openings.

[0169] like Figure 4 and Figure 5As shown, the base 612 is located at the center of the cylindrical portion 611, and its specific shape and size are not limited. In one possible implementation, the base 612 is a circular plate orthogonal to the first axis J1, and its center overlaps with the first axis J1. In other possible implementations, the base 612 is a hollow cylinder and is provided with a component fixedly connected to the bearing device 623; this embodiment does not limit this. The specific structure of the bearing device 623 will be explained later.

[0170] like Figure 4 and Figure 5 As shown, the housing 61 also includes support ribs 615, which extend inward from the inner circumferential surface of the cylindrical portion 611 and connect with the base 612 to jointly support the motor 62. Specifically, the number of support ribs 615 in the housing 61 is not limited. In one possible implementation, the housing 61 of the axial fan 6 is provided with multiple support ribs 615 (e.g., four support ribs 615). The support ribs 615 extend radially inward from the inner circumferential surface of the cylindrical portion 611 located at the first end 6111 and are evenly spaced in the circumferential direction.

[0171] It should be noted that the material of the outer casing 61 is not limited in this application embodiment. In one possible implementation, the outer casing 61 of the axial fan 6 is made of sheet metal structural parts. In one example, the sheet metal structural parts are assembled by splicing sheet metal parts or formed by bending sheet metal parts. In other possible implementations, the outer casing 61 can also be made of other materials. In one example, the outer casing 61, the support ribs 615, and the base 612 are resin molded bodies integrally formed by resin, that is, the outer casing 61 is a one-piece structure. In another example, the outer casing 61 can also be a plastic split structure.

[0172] The above mainly describes the specific structure of the outer casing 61 in the axial fan 6. The following text will explain the working principle of the axial fan 6 and its related components.

[0173] like Figure 4 and Figure 5 As shown, the motor 62 is mounted on the base 612 and is used to drive the impeller 63 to rotate. When the axial fan 6 is energized and rotates in the forward direction, the impeller 63 rotates in the forward direction, causing the airflow to flow from the air inlet 64 to the air outlet 65.

[0174] like Figure 4 and Figure 5As shown, the impeller 63 includes multiple blades 631 and a base wheel 632. It should be noted that the specific structure of the base wheel 632 is not limited in the embodiments of this application. In one possible implementation, the base wheel 632 is a covered cylindrical shape. In other possible implementations, the base wheel 632 can also be square, elliptical, etc., or the outer diameter of the outer circumference of the base wheel 632 can also be different in the axial direction, for example, it can be a frustum conical shape.

[0175] Furthermore, such as Figure 4 and Figure 5 As shown, blades 631 protrude radially outward from the radial outer surface of the base wheel 632. That is, the impeller 63 has a plurality of blades 631 extending radially outward and arranged circumferentially. It should be noted that the embodiments of this application do not limit the number or shape of the blades 631. In one example, the impeller 63 has seven blades 631. The seven blades 631 are arranged at equal intervals in the circumferential direction.

[0176] Furthermore, blade 631 has a leading edge 6311 and a trailing edge 6312. In the direction of the first axis J1, blade 631 gradually extends away from the inlet 64 from its trailing edge 6312 to its leading edge 6311, that is, gradually extends towards the outlet 65. Alternatively, in the direction of the first axis J1, the leading edge 6311 of blade 631 is located between the trailing edge 6312 and the outlet 65, and the trailing edge 6312 is located between the leading edge 6311 and the inlet 64. In the circumferential direction of the base wheel 632, blade 631 gradually extends towards the adjacent blade 631 from its trailing edge 6312 to its leading edge 6311. Through the forward rotation of impeller 63, a continuous airflow is generated from the inlet 64 to the outlet 65 in the direction of the first axis J1. In other words, the direction of inclination of blade 631 is consistent with the direction of forward rotation of blade 631. The direction of the impeller 63's forward rotation can also be understood as the direction of rotation from the trailing edge 6312 of each blade 631 toward the leading edge 6311.

[0177] The leading edge 6311 can be understood as the edge of blade 631 that first contacts the airflow, while the trailing edge 6312 can be understood as the distal edge of blade 631, i.e., the edge where the airflow finally leaves blade 631. The angle and shape of the trailing edge 6312 can affect the direction and speed of the airflow generated by blade 631.

[0178] It should be noted that the forward rotation of the axial fan 6 can be the direction in which the impeller 63 rotates forward when the fan is powered on, and the direction in which the impeller 63 rotates forward can be the direction in which the blades 631 are tilted, such as... Figure 4 and Figure 5As shown, when observing the first axis J1 from the air inlet 64 of the axial fan 6, the impeller 63 rotates in the direction of clockwise rotation around the first axis J1.

[0179] It should be noted that the specific structure of motor 62 is not limited. For example... Figure 4 and Figure 5 As shown, in one possible implementation, the motor 62 includes a stationary part 621, a moving part 622, and a bearing assembly 623. The bearing assembly 623 is disposed between the stationary part 621 and the moving part 622, and the moving part 622 is rotatably connected to the stationary part 621 via the bearing assembly 623. The impeller 63 is fixedly connected to the moving part 622, and the stationary part 621 is fixedly connected to the base 612. Therefore, by rotating the moving part 622 relative to the stationary part 621, the impeller 63 can be driven to rotate relative to the base 612.

[0180] It should be noted that the specific structure of the bearing device 623 is not limited. In one possible implementation, the bearing device 623 may include a fixed part 6231 and a rotating part 6232. The rotating part 6232 can rotate relative to the fixed part 6231 about the first axis J1. The fixed part 6231 of the bearing device 623 is fixedly connected to the stationary part 621, and the rotating part 6232 is fixedly connected to the moving part 622, so that the moving part 622 is rotatably connected to the stationary part 621 through the bearing device 623.

[0181] Furthermore, the specific type of bearing assembly 623 is not limited; for example, it can be a sliding bearing assembly (e.g., a ball bearing assembly), a hydrodynamic bearing assembly, etc. The number of bearing assemblies 623 is not limited; there can be one or more. In one example, such as... Figure 4 As shown, there are two bearing devices 623, which are spaced apart in the direction of the first axis J1.

[0182] like Figure 5 As shown, the stationary part 621 includes a stator 6212, which is fixed relative to the base 612. The stator 6212 can be directly fixed to the base 612, or it can be fixed to the base 612 via an intermediate component (e.g., the bearing retainer 6211 mentioned below). This embodiment of the application does not limit this. In one possible implementation, as... Figure 5 As shown, the stator 6212 is fixedly connected to the base 612, and the base 612 and the support rib 615 are integrally formed. Therefore, the motor 62 is fixedly connected to the housing 61 via the support rib 615, that is, the motor 62 is supported by the housing 61.

[0183] The specific structure of the stator 6212 is not limited. In one possible implementation, the stator 6212 includes a stator core and a coil wound around the stator core. It should be noted that the specific structure of the stator core is not limited; in one example, the stator core is a laminated body formed by stacking electromagnetic steel plates circumferentially. The stator core has an annular core back and multiple teeth extending radially outward from the outer circumference of the core back, forming a radial pattern, and the multiple teeth of the stator core are evenly arranged circumferentially. The coil is formed by winding wires around each tooth, which is covered with insulating material. In other possible implementations, the stator core can also be a single component such as a sintered powder body or a cast body.

[0184] Furthermore, in one possible implementation, a circuit board (not shown) may be mounted on the side of the base 612 facing the stator 6212. The circuit board is electrically connected to the coils of the stator 6212. The circuit board contains a drive circuit for driving the coils.

[0185] In one possible implementation, such as Figure 4 and Figure 5 As shown, the stationary part 621 may further include a bearing retaining part 6211, and the stator 6212 is fixed to the radially outer side of the bearing retaining part 6211. The bearing retaining part 6211 may be directly fixed to the base 612, or it may be fixed to the base 612 via the stator 6212; this embodiment does not impose any limitations on this.

[0186] Furthermore, the specific structure of the bearing retainer 6211 is not limited. In one example, the bearing retainer 6211 is cylindrical, located at the center of the base 612 of the housing 61, and extends from the air inlet 64 to the air outlet 65.

[0187] It should be noted that the specific dimensions of the bearing retainer 6211 are not limited in the embodiments of this application, and those skilled in the art can set them reasonably according to actual needs.

[0188] In one example, such as Figure 5As shown, the stator 6212 is directly fixedly connected to the base 612, and the bearing retaining part 6211 is pressed into the stator 6212, thus fixing the bearing retaining part 6211 and the stator 6212 to each other. This pressing-in is a tight fit. It should be noted that the fixing method of the bearing retaining part 6211 is not limited; it can also be fixed by means of bonding, etc. Furthermore, the fixing part 6231 of the bearing device 623 is fixedly connected to the bearing retaining part 6211. It should be noted that the fixing method of the fixing part 6231 of the bearing device 623 is not limited; it can be pressed in or bonded. This embodiment does not impose any limitations on this. Thus, the stationary part 621 is fixedly connected to the housing 61 and connected to the fixing part 6231 of the bearing device 623, thereby supporting the rotation of the rotor 622 and the impeller 63 and improving stability.

[0189] like Figure 5 As shown, the moving part 622 includes a rotor 6221 and a shaft 6222. The shaft 6222 is fixedly connected to the rotor 6221, allowing the shaft 6222 and the rotor 6221 to rotate together, thereby driving the impeller 63 to rotate. In one possible implementation, as shown... Figure 5 As shown, shaft 6222 is fixedly connected to the rotating portion 6232 of bearing assembly 623. In this way, shaft 6222 is supported by bearing assembly 623, allowing the moving part 622 to rotate relative to the stationary part 621. It should be noted that the center of shaft 6222 coincides with the first axis J1, allowing rotor 6221 to be rotatably supported on stationary part 621 around the first axis J1.

[0190] It should be noted that the fixing method between shaft 6222 and rotor 6221 is not limited. In one possible implementation, such as... Figure 5 As shown, the moving part 622 also includes a shaft fixing member 6223. In one example, the shaft 6222 is fixed to the shaft fixing member 6223 by pressing, so that the shaft 6222 and the shaft fixing member 6223, as the main parts of the transmission, rotate together. In another example, the shaft 6222 and the shaft fixing member 6223 can also be an integral structure, fixedly connected to the center part of the rotor 6221.

[0191] In other possible implementations, the shaft 6222 and the rotor 6221 can also be an integral structure.

[0192] Furthermore, the specific structure of the rotor 6221 is not limited. In one possible implementation, the rotor 6221 includes a permanent magnet and windings. Exemplarily, the permanent magnet is made of a metallic material and is a covered cylindrical shape centered on a first axis J1. In this case, the radially inner surfaces of the permanent magnet and windings of the rotor 6221 and the radially outer surface of the stator core are radially spaced apart.

[0193] Furthermore, the method of fixing the rotor 6221 and the impeller 63 is not limited. For example... Figure 4 As shown, in one possible implementation, a permanent magnet of the rotor 6221 is fixed inside the base wheel 632 of the impeller 63. The method of fixing the permanent magnet to the base wheel 632 is not limited. In one possible implementation, the permanent magnet is fixedly connected to the inside of the base wheel 632 by adhesive bonding. In other possible implementations, the permanent magnet is fixedly connected to the inside of the base wheel 632 by press-fitting, or by fasteners such as screws. In this way, the impeller 63 is fixedly connected to the rotor 6221. In other possible implementations, the rotor 6221 and the impeller 63 are fixed by adhesive bonding or other methods.

[0194] Understandably, in the axial fan 6, the impeller 63 is fixed to the moving part 622 of the motor 62. Through the electromagnetic field between the rotor 6221 of the moving part 622 and the stator 6212 of the stationary part 621, the moving part 622 rotates relative to the stationary part 621 about the first axis J1, thereby driving the rotation of the impeller 63 and accelerating the airflow in the vicinity of the axial fan 6.

[0195] The above mainly introduced the basic structure of the axial fan 6. The following text will explain the specific structure of the limiting mechanism (including the limiting structure 713 and the concave-convex surface 722 mentioned below) in the embodiment of this application.

[0196] Please see Figures 6-11 , Figure 6 This is a schematic diagram showing the fit between the axial fan and the limiting structure in an embodiment of this application. Figure 7 This is a schematic diagram of one embodiment of the limiting groove of the first structural component in the axial fan of this application. Figure 8 This is a schematic diagram of one embodiment of the groove in the second structural component of the axial fan in this application. Figures 9a-9c This is a partial schematic diagram illustrating the implementation of the limiting structure in the axial flow fan according to an embodiment of this application. Figure 10 This is a schematic diagram of another embodiment of the limiting groove in the limiting structure of the axial flow fan in this application. Figure 11 This is a schematic diagram of another embodiment of the limiting groove of the first structural component in the axial flow fan of this application. It should be noted that... Figures 9a-9c This is a partial enlarged view of the area where the axial fan of this application has a limiting structure. The dashed arrow in the figure indicates the direction of motion of the second structural member relative to the first structural member when the axial fan rotates forward. The figure is for illustrative purposes only.

[0197] like Figure 6 As shown, and in combination Figure 5It is understood that the axial flow fan 6 has a first structural component 71 and a second structural component 72, which can rotate relative to each other around a first axis J1. A limiting mechanism is provided between the facing surfaces of the first structural component 71 and the second structural component 72. When the axial flow fan 6 is energized, the impeller 63 rotates in the forward direction (i.e., the axial flow fan 6 rotates forward), and the first structural component 71 and the second structural component 72 rotate relative to each other in the corresponding direction. The limiting mechanism continuously alternates between the limited position and the non-limited position. When the impeller 63 has a tendency to rotate in the reverse direction (i.e., the axial flow fan 6 has a tendency to rotate in the reverse direction), the first structural component 71 and the second structural component 72 will also have a tendency to rotate in the corresponding direction. Through the limiting action of the limiting mechanism at the limited position, the rotation in the corresponding direction between the first structural component 71 and the second structural component 72 can be restricted, thereby restricting the reverse rotation of the impeller 63.

[0198] It should be noted that the first structural member 71 and the second structural member 72 can be two components that can rotate arbitrarily relative to each other. In one possible implementation, the first structural member 71 is the base 612, and the second structural member 72 is the rotor 6221 of the moving part 622. In another possible implementation, the first structural member 71 is the base 612, and the second structural member 72 is the rotating part 6232 of the bearing device 623. In yet another possible implementation, the first structural member 71 is the rotor 6221 of the moving part 622, and the second structural member 72 is the base 612. In yet another possible implementation, the first structural member 71 is the rotor 6221 of the moving part 622, and the second structural member 72 is the rotating part 6232 of the bearing device 623. Those skilled in the art will understand that the specific position of the limiting mechanism can be reasonably set according to actual needs. This application embodiment does not impose any restrictions on this, thereby limiting the reverse rotation of the axial fan 6 and ensuring the heat dissipation effect of the computing device 100.

[0199] To better illustrate the solution of the embodiments of this application, the following description mainly focuses on the rotor 6221, in which the first structural member 71 is the base 612 and the second structural member 72 is the moving part.

[0200] like Figure 6 and Figure 8 As shown, the first structural member 71 includes a limiting surface 711. The limiting surface 711 is provided with at least one limiting groove 712, and each limiting groove 712 is provided with a limiting structure 713. The limiting structure 713 is configured as a telescopic structure so that the limiting structure 713 can switch between an extended state and a retracted state.

[0201] The second structural member 72 includes a limiting surface 721. The limiting surface 721 is disposed opposite to the limiting surface 711. The limiting surface 721 is configured as a concave-convex surface 722, which surrounds the first axis J1 and forms a plurality of grooves 723 spaced apart along the circumference of the second structural member 72. Each groove 723 includes a first groove wall surface 7233 and a second groove wall surface 7234 disposed opposite to each other along the circumference of the second structural member 72, and a protrusion 724 is formed between two adjacent grooves 723.

[0202] When the limiting structure 713 is in the extended state, the end of the limiting structure 713 away from the limiting groove 712 abuts against the corresponding groove 723. Furthermore, when the limiting structure 713 is subjected to a force applied by the first groove wall 7233 of the groove 723, the limiting structure 713 can retract towards the interior of the limiting groove 712 and slide out of the current groove 723, switching to a retracted state, causing the first structural member 71 and the second structural member 72 to rotate relative to each other around the first axis J1. When the axial fan 6 rotates clockwise, the first structural member 71 and the second structural member 72 rotate relative to each other, and the limiting structure 713 alternates between the extended and retracted states.

[0203] In other words, such as Figure 6 and Figure 8 As shown, the first structural member 71 includes a limiting surface 711, and correspondingly, the second structural member 72 includes a limited surface 721, with the limiting surface 711 and the limited surface 721 disposed opposite to each other. The limiting surface 711 has at least one limiting groove 712 for providing a limiting structure 713, and the limiting structure 713 is a telescopic structure. The limited surface 721 is a concave-convex surface 722. The limited surface 721 of the second structural member 72 has multiple grooves 723 and protrusions 724 spaced circumferentially, allowing the limiting structure 713 to alternate between an extended state and a retracted state. The grooves 723 include a first groove wall surface 7233 and a second groove wall surface 7234 disposed opposite to each other circumferentially along the second structural member 72.

[0204] like Figure 9a As shown, when the limiting structure 713 is in the extended state, it abuts against the corresponding groove 723. During the forward rotation of the axial fan, the limiting structure 713 is subjected to a force exerted by the first groove wall 7233 of the current groove 723 (at position D in the figure), which allows the limiting structure 713 to slide out of the current groove 723 and retract toward the interior of the limiting groove 712, thereby switching to the retracted state (see Figure 723). Figure 9b ).like Figure 6 As shown, when the limiting structure 713 alternates between the extended state and the retracted state, the first structural member 71 and the second structural member 72 rotate relative to each other around the first axis J1, that is, the axial fan 6 can rotate forward.

[0205] like Figure 9b As shown, when the limiting structure 713 is in the retracted state, the end of the limiting structure 713 away from the limiting groove 712 is located outside the groove 723. In this way, during the forward rotation of the axial fan 6, the limiting structure 713 can be continuously compressed, so that there is no interference between the limiting structure 713 and the groove wall of the groove 723. Thus, the limiting structure 713 can continuously switch between the extended state and the retracted state, thereby enabling relative rotation between the first structural member 71 and the second structural member 72, thus realizing the function of the axial fan 6.

[0206] like Figure 6 and Figure 9c As shown, when the limiting structure 713 is subjected to a force applied by the second groove wall 7234 of the groove 723, the limiting structure 713 remains in the position abutting against the current groove 723, and the limiting structure 713 abuts against the wall of the limiting groove 712 (e.g., Figure 9c The upper limit structure 713 (located at position E) restricts the relative rotation between the first structural member 71 and the second structural member 72. That is, under the action of the upper limit structure 713 on the first structural member 71, even if the axial fan 6 tends to reverse, the upper limit structure 713 will be subjected to the force exerted by the second groove wall 7234 of the current groove 723, so that the upper limit structure 713 abuts against the wall of the upper limit groove 712 and cannot retract into the upper limit groove 712. This causes the upper limit structure 713 to remain fixed in the current groove 723, so that the first structural member 71 and the second structural member 72 cannot rotate relative to each other, thus preventing the axial fan 6 from reversing.

[0207] Therefore, the axial fan 6 provided in this application can be used in the heat dissipation system of the computing device 100. The forward rotation of the axial fan 6 can accelerate the airflow inside the computing device 100, speed up the heat exchange rate, thereby efficiently dissipating heat from the computing device 100 and ensuring the stable and reliable operation of the computing device 100.

[0208] It should be noted that the fan module 5 in the computing device 100 uses at least one axial fan 6 provided in this embodiment. This allows for better fan operation in scenarios where the computing device 100 supports hot-swapping of each computing node 21. Figure 2b and Figure 9cAs shown, some of the unpowered axial fans 6 are affected by the axial fans 6 in other normally operating areas, causing these unpowered axial fans 6 to tend to reverse. However, since the limiting structure 713 can abut against the limiting groove 712, it restricts the relative rotation between the first structural member 71 and the second structural member 72, preventing the axial fans 6 from reversing. Therefore, it ensures that the external heat flow of the computing device 100 chassis 1 will not re-enter the chassis 1 through the unpowered axial fans 6, thus ensuring the heat dissipation effect of the computing device 100. It is understood that in the fan module 5 of the computing device 100, some axial fans may adopt the axial fans 6 with limiting mechanisms as described in the embodiments of this application, or all axial fans may adopt the axial fans 6 with limiting mechanisms as described in the embodiments of this application. This application does not limit this.

[0209] In scenarios where the computing device 100 supports hot-swapping of each computing node 21, the axial fans 6 in areas where no computing nodes 21 are located do not need to be fully powered. That is, the axial fans in these areas can be partially ordinary fans, partially the axial fans 6 provided in this embodiment, or all of them can be the axial fans 6 provided in this embodiment; this embodiment does not impose any restrictions. In this way, the axial fans in areas where no computing nodes 21 are located can be partially or completely powered off, ensuring the cooling effect of the computing device 100 while promoting energy conservation and improving the economic efficiency of the computing device.

[0210] In simple terms, when the computing nodes corresponding to the axial fans in some areas are not working, those axial fans can also stop working without reversing their direction and carrying heat back into the computing device chassis. This ensures the cooling effect of the computing device itself while also taking into account its economic efficiency, reducing the operating cost of the computing device, and to some extent improving the cooling capacity of the computing device, thereby improving the reliability of the computing device.

[0211] In summary, the axial fan provided in this application embodiment is not prone to reverse rotation. In areas where the power is off, the axial fan will not carry the heat from outside the computing device chassis back inside, thus ensuring the heat dissipation effect of the computing device. Furthermore, it can better balance the economic benefits of the computing device and improve the reliability of its operation.

[0212] It should be noted that the specific relative positions of the restricted surface 721 and the restricting surface 711 are not limited. In one possible implementation, such as... Figure 6 and Figure 8As shown, the limiting surface 721 and the limiting surface 711 are arranged opposite to each other in the direction of the first axis J1. In this way, the groove 723 on the limiting surface 721 and the limiting structure 713 on the limiting surface 711 can directly engage, resulting in a simple structure that improves structural stability and the reliability of functional implementation. In other possible implementations, the limiting surface 721 and the limiting surface 711 can also be arranged opposite to each other in a direction perpendicular to the first axis J1; this embodiment does not impose any limitation on this.

[0213] It should be noted that the projection of the limiting surface 711 in the direction of the first axis J1 can be entirely located within the projection area of ​​the limiting surface 721, or the projection of the limiting surface 711 in the direction of the first axis J1 can be partially located within the projection area of ​​the limiting surface 721 and partially located outside the projection area of ​​the limiting surface 721. This application embodiment does not impose any restrictions on this.

[0214] Furthermore, the specific structure of the groove 723 is not limited. In one possible implementation, such as... Figure 6 and Figure 8 As shown, in the groove 723, the first edge of each groove wall surface 7233 and the second groove wall surface 7234 is located at the groove opening 7231 of the groove 723, and the second edge of each groove wall surface is located at the groove bottom 7232 of the groove 723. From the first edge to the second edge of each groove wall surface, the first groove wall surface 7233 and the second groove wall surface 7234 gradually extend in a direction that approaches each other. That is, the first edge 7233a of the first groove wall 7233 and the first edge 7234a of the second groove wall 7234 are arranged opposite each other at the opening 7231 of the groove 723, and the second edge 7233b of the first groove wall 7233 and the second edge 7234b of the second groove wall 7234 are arranged opposite each other at the bottom 7232 of the groove 723. From the opening 7231 to the bottom 7232 of the groove 723, the distance between the first groove wall 7233 and the second groove wall 7234 gradually decreases. For example, the distance between the second edge 7233b of the first groove wall 7233 and the second edge 7234b of the second groove wall 7234 is smaller than the distance between the first edge 7233a of the first groove wall 7233 and the first edge 7234a of the second groove wall 7234. In this way, the first groove wall 7233 and the second groove wall 7234 can abut against the limiting structure 713 in real time during the relative rotation between the first structural member 71 and the second structural member 72, thereby more stably realizing the alternating switching of the limiting structure 713 between the elongated state and the contracted state.

[0215] Furthermore, the second edge 7233b of the first groove wall 7233 and the second edge 7234b of the second groove wall 7234 can be connected or spaced apart; this embodiment does not limit this. Figure 6 As shown, in one example, the second edge 7233b of the first groove wall 7233 and the second edge 7234b of the second groove wall 7234 are connected and both are located at the bottom 7232 of the groove 723.

[0216] In other possible implementations, the second edge of each groove wall can also be located between the groove opening 7231 and the groove bottom 7232 of the groove 723, that is, the second edge 7233b of the first groove wall 7233 and the second edge 7234b of the second groove wall 7234 can be located between the groove opening 7231 and the groove bottom 7232 of the groove 723.

[0217] It should be noted that the specific shape of the groove 723 is not limited. For example... Figure 6 and Figure 8 As shown, in one example, the groove 723 is configured as a serrated groove, and the protrusion 724 is configured as a serrated protrusion. In this case, the groove 723 and the protrusion 724 on the second structural member 72 are easy to implement and the process is simple.

[0218] It should be noted that the extension direction of the limiting groove 712 can be the length direction of the limiting groove 712, that is, the direction of the extension path from the groove opening 7231 to the groove bottom 7232. It can be understood that the extension direction of the limiting groove 712 can also be the contraction direction of the limiting structure 713.

[0219] In this embodiment, the extending direction of the limiting groove 712 is not limited. In one possible implementation, such as... Figure 7 As shown, the limiting groove 712 extends both in the circumferential direction of the first structural member 71 and in the direction of the first axis J1. That is, the limiting groove 712 is inclined in the direction of the first axis J1. In this way, the limiting groove 712 can better cooperate with the relative rotation characteristics between the first structural member 71 and the second structural member 72. The limiting structure 713 is specifically arranged so that the limiting structure 713 can be continuously compressed into the limiting groove 712 during forward rotation, thereby ensuring the reliable performance of the axial fan 6.

[0220] The angle at which the limiting groove 712 is inclined relative to the direction of the first axis J1 is not limited. In one possible implementation, the angle of inclination of the extending direction of the limiting groove 712 relative to the direction of the first axis J1 is in the range of 15°-80°. In other possible implementations, the angle of inclination of the extending direction of the limiting groove 712 relative to the direction of the first axis J1 may be less than 15° or greater than 80°, and this application embodiment does not impose any restrictions on this.

[0221] It should be noted that the embodiments of this application do not limit the number (one or two or more) or size of the limiting grooves 712, and those skilled in the art can set them reasonably according to actual design requirements. One possible implementation is as follows: Figure 6 and Figure 7 As shown, the limiting surface 711 is provided with multiple limiting grooves 712, which are distributed in a ring-shaped interval on the limiting surface 711. In the circumferential direction of the first structural member 71, the bottom 7121 of the limiting groove 712 is located between the groove opening 7122 and the groove opening 7122 of an adjacent limiting groove 712, for example, as... Figure 7 As shown, the bottom 7121 of the limiting groove 712 on the right is located between the opening 7122 and the opening 7122 of the uppermost limiting groove 712. This design allows for greater flexibility in the design of the limiting groove 712 on the first structural component 71, enabling specific configuration based on the direction of rotation of the axial fan 6, which is beneficial for the stability of the function.

[0222] In one example, such as Figure 7 As shown, the limiting surface 711 has four limiting grooves 712, which are evenly arranged around the circumferential plane of the first structural member 71, so that the limiting structure 713 can be partially accommodated in the corresponding limiting groove 712. When the limiting structure 713 is in a compressed state, the limiting structure 713 can be completely retracted into the limiting groove 712 under extreme compression, ensuring the stability of the fit between the limiting structure 713 and the concave-convex surface 722.

[0223] It is understood that the limiting structure 713 is set in the limiting groove 712. Therefore, the number and size of the limiting structure 713 can also be specifically set according to the number and size of the limiting groove 712 in the first structural member 71. This application will not elaborate on this further.

[0224] In another example, such as Figure 11 As shown, the limiting surface 711 has 12 limiting grooves 712, which are evenly arranged around the circumferential plane of the first structural member 71. In this way, the limiting structure 713 located in the limiting groove 712 can better prevent the axial fan from reversing, ensuring the reliability of the axial fan application, thereby improving the heat dissipation effect of the computing device during hot-swapping.

[0225] Furthermore, the shape of the limiting groove 712 is not limited; in one possible implementation, such as... Figure 7 As shown, the opening 7122 of the limiting groove 712 is circular, and correspondingly, the cross-section of the limiting structure 713 should also be circular. In other possible implementations, such as... Figure 10 As shown, the opening 7122 of the limiting groove 712 is set to square, and correspondingly, the cross-section of the limiting structure 713 should also be square.

[0226] The above mainly describes the arrangement and matching method of the limiting structure 713 in the axial flow fan. The following will describe the specific structure of the limiting structure 713.

[0227] It should be noted that the specific structural form of the limiting structure 713 is not limited in the embodiments of this application. One possible implementation is as follows: Figures 9a-9c As shown, the limiting structure 713 may include a limiting member 7131 and an elastic member 7134. The limiting member 7131 is slidably connected to the limiting groove 712 along its length. The elastic member 7134 abuts against one end 7132 of the limiting member 7131 and the bottom 7121 of the limiting groove 712. When the limiting structure 713 is in an extended state, the other end 7133 of the limiting member 7131 abuts against the corresponding groove 723. In this way, the limiting member 7131 can slide along the length of the limiting groove 712. Furthermore, the limiting member 7131 switches between the compressed and extended states through the compression and release of the elastic member 7134, thereby ensuring the stability of the relative rotation between the first structural member 71 and the second structural member 72, and thus ensuring the stability and reliability of the forward rotation of the axial fan.

[0228] Furthermore, such as Figure 9c As shown, when the axial fan tends to reverse, the limiting member 7131 will be subjected to the force exerted by the second groove wall 7234 of the current groove 723, at position E in the figure, so that the limiting member 7131 abuts against the wall of the limiting groove 712, thereby restricting the relative rotation between the first structural member 71 and the second structural member 72, and thus more effectively preventing the axial fan 6 from reversing.

[0229] In one possible implementation, such as Figure 6 and Figure 9a As shown, when the limiting structure 713 is in the extended state, the end face of the other end 7133 of the limiting member 7131 abuts against the first groove wall surface 7233 of the groove 723, and the outer side surface of the other end 7133 of the limiting member 7131 abuts against the second groove wall surface 7234 of the groove 723. With this structure, the limiting member 7131 can abut against the groove wall surface of the groove 723, better realizing the transmission of force, thereby ensuring the functional realization of the limiting member 7131 when abutting against different groove sidewalls, and improving the structural stability of the axial fan 6.

[0230] In one possible implementation, such as Figure 9aAs shown, when the limiting structure 713 is in the extended state, a gap may also be left between the end face of the other end 7133 of the limiting member 7131 and the first groove wall surface 7233 of the groove 723, and a gap may also be left between the outer side surface of the other end 7133 of the limiting member 7131 and the second groove wall surface 7234 of the groove 723. This embodiment of the application does not limit this. In other possible implementations, such as... Figure 6 As shown, when the limiting structure 713 is in the extended state, part of the outer surface of the limiting member 7131 directly abuts against the first groove wall 7233 and the second groove wall 7234 of the groove 723, which helps to improve the structural reliability of the limiting structure 713.

[0231] It should be noted that the specific structure of the limiting member 7131 and the elastic member 7134 is not limited. In one possible implementation, the limiting member 7131 is a limiting post and the elastic member 7134 is a spring.

[0232] The specific shape of the limiting post is not limited. In one example, the limiting post is a cylinder, which can better retract into the limiting groove 712. In another example, the limiting post is a prism, which has a larger contact area between the limiting member and the second groove wall when the axial fan rotates forward, resulting in higher structural stability.

[0233] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An axial flow fan characterised in that, include: A first structural component and a second structural component, wherein the first structural component and the second structural component are rotatable relative to each other about a first axis; The first structural component includes a limiting surface, the limiting surface is provided with at least one limiting groove, each limiting groove is provided with a limiting structure, and the limiting structure is configured as a telescopic structure so that the limiting structure can switch between an extended state and a retracted state. The second structural member includes a limiting surface, which is disposed opposite to the limiting surface. The limiting surface has a concave and convex surface, which surrounds the first axis and forms a plurality of grooves spaced apart along the circumference of the second structural member. Each groove includes a first groove wall and a second groove wall disposed opposite to each other along the circumference of the second structural member, and a protrusion is formed between two adjacent grooves. Specifically, when the limiting structure is in an extended state, the end of the limiting structure away from the limiting groove abuts against the corresponding groove; and when the limiting structure is subjected to a force applied by the first groove wall surface of the groove, the limiting structure can retract toward the interior of the limiting groove and slide out of the current groove to switch to a retracted state, so that the first structural member and the second structural member can rotate relative to each other around the first axis; when the limiting structure is subjected to a force applied by the second groove wall surface of the groove, the limiting structure remains at the position abutting against the current groove to restrict the relative rotation between the first structural member and the second structural member; When the limiting structure is in a retracted state, the end of the limiting structure away from the limiting groove is located outside the groove; When the axial fan rotates forward, the first structural member and the second structural member rotate relative to each other, and the limiting structure alternates between an extended state and a retracted state.

2. The axial fan according to claim 1, wherein The limiting structure includes a limiting member and an elastic member. The limiting member is slidably connected to the limiting groove along the length direction of the limiting groove, and the elastic member abuts against one end of the limiting member and the bottom of the limiting groove. When the limiting structure is in the extended state, the other end of the limiting member abuts against the corresponding groove.

3. The axial flow fan as described in claim 2, characterized in that, When the limiting structure is in the extended state, the end face of the other end of the limiting member abuts against the first groove wall surface of the groove, and the outer side surface of the other end of the limiting member abuts against the second groove wall surface of the groove.

4. The axial flow fan as described in claim 2 or 3, characterized in that, The limiting element is a limiting post, and the elastic element is a spring.

5. The axial flow fan as described in any one of claims 1-4, characterized in that, The limiting groove extends simultaneously in the circumferential direction of the first structural member and in the direction of the first axis.

6. The axial flow fan according to any one of claims 1-5, characterized in that, In the groove, the first edge of each of the first and second groove wall surfaces is located at the opening of the groove, and the second edge of each of the groove wall surfaces is located at the bottom of the groove, or at a position between the opening and the bottom of the groove. From the first edge to the second edge of each of the groove wall surfaces, the first and second groove wall surfaces gradually extend in a direction that approaches each other.

7. The axial flow fan according to any one of claims 1-6, characterized in that, The groove is configured as a serrated groove, and the protrusion is configured as a serrated protrusion.

8. The axial fan as described in any one of claims 1-7, characterized in that, The at least one limiting groove is a plurality of limiting grooves, and the plurality of limiting grooves are distributed in a ring-shaped interval on the limiting surface; In the circumferential direction of the first structural member, the bottom of the limiting groove is located between the groove opening and the groove opening of an adjacent limiting groove.

9. The axial flow fan according to any one of claims 1-8, characterized in that, The restricted surface and the limiting surface are arranged opposite each other in the direction of the first axis.

10. The axial flow fan according to any one of claims 1-9, characterized in that, The axial fan includes: The outer casing includes a cylindrical portion and a base. The cylindrical portion includes a first end and a second end disposed opposite to each other in the direction of the first axis. The base is located within an opening formed by the first end and is connected to the first end. An air inlet is formed between the outer peripheral surface of the base and the inner wall surface of the first end. An air outlet is formed around the inner wall surface of the second end. An impeller, wherein the cylindrical portion surrounds the outer periphery of the impeller, and the impeller is rotatable relative to the outer casing about the first axis; A motor, which is mounted on the base and is used to drive the impeller to rotate; When the axial fan rotates forward, the impeller rotates in the forward direction, causing the airflow to flow from the air inlet to the air outlet.

11. The axial flow fan as described in claim 10, characterized in that, The motor includes a stationary part, a moving part, and a bearing assembly. The bearing assembly is disposed between the stationary part and the moving part. The impeller is fixedly connected to the moving part, and the stationary part is fixedly connected to the base. The bearing device includes a fixed part and a rotating part. The rotating part is rotatable relative to the fixed part about the first axis. The fixed part of the bearing device is fixedly connected to the stationary part, and the rotating part is fixedly connected to the moving part, so that the moving part is rotatably connected to the stationary part through the bearing device. Wherein, the first structural member is the base, and the second structural member is the rotor of the moving part or the rotating part of the bearing device; or, the first structural member is the rotor of the moving part or the rotating part of the bearing device, and the second structural member is the base.

12. A computing device, characterized in that, include: The chassis has a first cavity, a connecting cavity, and a second cavity arranged sequentially and communicating along a first direction. The first cavity includes a plurality of first mounting cavities arranged sequentially along a second direction. Each first mounting cavity has an air inlet at one end and an air outlet at the other end, and communicates with the connecting cavity. The plurality of first mounting cavities are interconnected through their respective air outlets and the connecting cavity. The second cavity includes a plurality of second mounting cavities arranged sequentially along the second direction, wherein the first direction is perpendicular to the second direction. A node module, the node module including at least one computing node, each computing node being installed in the first mounting cavity corresponding to the first cavity; A fan module comprising multiple axial fan groups arranged sequentially in a second direction and corresponding to multiple second mounting cavities. Each axial fan group is installed in a corresponding second mounting cavity and includes at least one axial fan. Some or all of the axial fans in the fan module are axial fans as described in any one of claims 1-11. The air inlet of each axial fan is arranged opposite to the air outlet of at least one first mounting cavity in the first direction, and the air outlet of each axial fan faces the outside of the chassis.

13. The computing device as claimed in claim 12, characterized in that, The computing device also includes a backplate, which is installed in the connection cavity. The node module is inserted into one side of the backplate and electrically connected to the backplate. The fan module is inserted into the other side of the backplate and electrically connected to the backplate. One side and the other side of the backplate are arranged opposite to each other in the thickness direction of the backplate.

14. The computing device as claimed in claim 13, characterized in that, The computing device further includes a management module, which is installed in the chassis, and the node module and the fan module are respectively communicatively connected to the management module; When a computing node that is plugged into the backplane is installed in the first mounting cavity, the management module controls the corresponding axial fan to be powered on and rotate forward; when no computing node that is plugged into the backplane is installed in the first mounting cavity, the management module controls the corresponding axial fan to be powered off.

15. The computing device according to any one of claims 12-14, characterized in that, Each axial fan group includes a plurality of axial fans arranged sequentially in the third direction, and each second mounting cavity includes a plurality of sub-mounting cavities arranged sequentially in the third direction. The plurality of sub-mounting cavities are correspondingly arranged with the plurality of axial fans, and each axial fan of the axial fan group is installed in the corresponding sub-mounting cavity. The third direction is perpendicular to both the first direction and the second direction.

16. The computing device according to any one of claims 12-15, characterized in that, The computing device is a server; The end of the first cavity away from the connecting cavity constitutes the air inlet of the chassis, and the end of the second cavity away from the connecting cavity constitutes the air outlet of the chassis.

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