A computing power server with a cooling device

Abstract

The application relates to the technical field of servers, and specifically discloses a computing power server with a cooling device, which comprises a server case, a case cover plate, a fan, a GPU, a heat dissipation fin and a flow disturbing mechanism. The inner cavity bottom end of the server case is provided with a mainboard, the case cover plate is detachably arranged at the top end of the server case, the fan is screw-connected to the inner cavity top end front side of the case cover plate, the GPU is detachably arranged on the mainboard at the inner cavity bottom end of the server case, the heat dissipation fin is adhered to the top end of the GPU through heat conduction glue, and the flow disturbing mechanism is arranged at the inner cavity top end of the case cover plate. The device has the advantages of high structural integration, significantly improved heat dissipation efficiency, self-adaptive adjustable flow disturbing strength, combined active dust removal function, energy saving and noise reduction under low load, small heat dissipation performance attenuation under long-term operation and the like, and provides a high-efficiency, intelligent and maintenance-free comprehensive heat dissipation solution for high-power servers.

Description

Technical Field

[0001] This invention relates to the field of server technology, specifically to a computing server with a built-in cooling device. Background Technology

[0002] As the core computing power carrier of data centers, servers integrate computing chips such as CPUs and GPUs, which generate a lot of heat during operation. In particular, with the popularization of applications such as artificial intelligence training and high-performance computing, the thermal design power of GPUs has increased from hundreds of watts to kilowatts, and the heat flux density per unit area has increased dramatically. If the heat generated by the chip cannot be effectively dissipated to the external environment in time, the chip junction temperature will rise rapidly, exceeding its allowable operating temperature range, resulting in a decrease in computing performance, a shortened equipment life, or even thermal failure shutdown. Therefore, the heat dissipation capacity of servers has become a key bottleneck restricting the improvement of computing power density and the stable operation of the system. Currently, the most widely used heat dissipation method in servers is air cooling. Its basic form involves mounting heat sinks with parallel fins on the chip surface and placing a fan inside the chassis. The fan drives airflow across the fin surface, carrying away heat through convection. To further enhance heat transfer, existing technologies typically employ two approaches: first, increasing the surface area of ​​the fins, such as increasing the height, density, or length of the fins to expand the heat exchange area between the air and the solid; second, increasing the fan speed to increase the airflow velocity through the gaps between the fins. However, both of these techniques have significant limitations in practical applications. Regarding increasing the fin area, when air flows along the fin surface, due to fluid viscosity, a region with a very large velocity gradient is formed near the solid wall, where the velocity of fluid molecules adhering to the wall is minimal. The region is called the laminar boundary layer. Within this boundary layer, the air is almost still. Air itself is a poor conductor of heat, with a thermal conductivity only a fraction of that of metals. Therefore, this laminar boundary layer constitutes the main thermal resistance for heat transfer from the fins to the main airflow. As the airflow extends along the fin direction, the thickness of the laminar boundary layer continues to increase, and the thermal resistance increases accordingly. This significantly reduces the convective heat transfer coefficient of the fin surface far from the airflow inlet area, and the heat dissipation benefits from increasing the fin area show a clear diminishing marginal effect. As for increasing the fan speed, although it can reduce the boundary layer thickness and increase the turbulence intensity to some extent, the fan power consumption increases cubically with the speed. The energy consumption increase caused by high speed is unacceptable in large-scale deployments of data centers, and simply increasing the flow velocity cannot fundamentally eliminate the thermal resistance caused by the stationary layer attached to the wall. Furthermore, servers operate in well-ventilated environments for extended periods. Dust particles from the ambient air can enter the gaps between the heatsink fins with the cooling airflow. Under traditional air-cooling conditions, these dust particles are captured by the static air film within the laminar boundary layer. Under the influence of electrostatic and van der Waals forces, they gradually settle and accumulate on the fin surface and in the dead corners at the base, forming a dust layer with extremely high thermal resistance. This dust layer not only further isolates heat transfer but also gradually blocks airflow channels, increasing wind resistance and causing the heat dissipation performance to continuously decline over time. In existing technologies, it is usually necessary to periodically shut down the server and use a high-pressure air gun or vacuum cleaner for manual cleaning and maintenance, which not only increases maintenance costs but also affects the availability of the server. Summary of the Invention

[0003] The purpose of this invention is to provide a computing server with a built-in cooling device, so as to at least solve the problems of laminar boundary layer thermal resistance being difficult to eliminate effectively and heat dissipation attenuation caused by dust accumulation during long-term operation in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a computing server with a built-in cooling device, comprising: a server chassis, a chassis cover, a fan, a GPU, a heat sink, and a baffle mechanism. The motherboard is disposed at the bottom of the inner cavity of the server chassis, the chassis cover is detachably disposed at the top of the server chassis, the fan is screwed to the front side of the top of the inner cavity of the chassis cover, the GPU is detachably disposed on the motherboard at the bottom of the inner cavity of the server chassis, the heat sink is bonded to the top of the GPU with thermally conductive adhesive, and the baffle mechanism is disposed at the top of the inner cavity of the chassis cover.

[0005] Preferably, the aerodynamic mechanism includes: a first bracket, a slide groove, a power component, a first guide rod, a first slider, a spoiler, a jet, a drive groove, and an adjustment component. Two first brackets are respectively disposed on the front and rear sides of the top of the inner cavity of the chassis cover. A slide groove is formed at the bottom of each first bracket along the left-right direction. The power component is mounted on the output shaft of a fan, and its rotation is driven by the output of the fan. The left and right ends of the first guide rod are respectively disposed on the left and right sides of the inner cavity of the slide groove. The front and rear sides of the top of the first slider are respectively... The sliding mating parts are inserted into the inner cavities of the two sliding grooves. The front and rear sides of the top of the first slider are respectively slidably mated to the outer walls of the two first guide rods. A driving groove is opened in the middle of the top of the first slider along the front and rear direction. There are several baffles. The tops of several baffles are equidistantly arranged at the bottom of the first slider along the left and right directions. The bottoms of several baffles are inserted into the gaps between every two adjacent fins on the heat sink. Several through holes are opened on the left side of the baffle. The adjustment component is arranged between the two first supports.

[0006] Preferably, the bottom end of the spoiler is provided with a brush, and the ends of the brush bristles are in contact with the surface of the heat sink.

[0007] Preferably, the adjusting assembly includes: a first support plate, a sleeve, a second pulley, a guide rail, a moving groove, a rack, a second slider, a drive rod, and a drive assembly. The front and rear ends of the first support plate are respectively disposed at the middle of the inner bottom ends of the two first brackets. The sleeve is rotatably disposed in the inner cavity of the first support plate via bearings. The second pulley is disposed at the bottom end of the sleeve and can be driven to rotate by the power assembly. The guide rail is disposed at the middle of the bottom end of the second pulley, and a vertically penetrating moving groove is formed on the right side of the bottom end of the guide rail's inner cavity in the left-right direction. The moving groove is formed by slidably fitting the rack into the right side of the inner cavity of the guide rail. Two second sliders are respectively located at the front and rear bottom ends of the rack, and are slidably fitted into the inner cavity of the guide rail. A drive rod is located at the bottom right end of the rack, and its outer wall is slidably fitted into the right side of the inner cavity of the moving groove. The bottom end of the drive rod slidably extends out of the bottom end of the guide rail, and its outer bottom end is slidably fitted into the inner cavity of the drive groove. The drive assembly is located within the inner cavity of the sleeve.

[0008] Preferably, the drive assembly includes: a rotating drum, drive columns, a gear, a telescopic rod, a helical drive groove, a sleeve plate, and a second guide rod. The rotating drum is rotatably mounted on the bottom end of the inner cavity of the second pulley via bearings, and the bottom end of the rotating drum rotatably extends beyond the bottom end of the second pulley. There are two drive columns, respectively located at the top left and right sides of the inner cavity of the rotating drum. The gear is located at the bottom end of the rotating drum, and the gear meshes with a rack. The telescopic rod is slidably fitted into the inner cavity of the rotating drum. The top end of the telescopic rod extends slidably from the top of the rotating drum, and the bottom end of the telescopic rod extends slidably from the bottom end of the gear. Two helical drive grooves are equidistantly opened on the outer wall of the telescopic rod along the circumference. The two drive columns are slidably fitted into the inner cavities of the two helical drive grooves. The front side of the bottom end of the sleeve plate is set at the top end of the telescopic rod. There are two second guide rods, which are respectively set on the left and right sides of the top end of the second pulley. The left and right sides of the sleeve plate are slidably fitted into the outer walls of the two second guide rods.

[0009] Preferably, the drive assembly further includes: a second support plate, guide cylinders, a screw, a push plate, a third guide rod, and a motor. The bottom left and right sides of the second support plate are respectively disposed on the top left and right sides of the first support plate. There are two guide cylinders, which are respectively disposed on the bottom left and right sides of the second support plate. The top of the outer wall of the screw is rotatably disposed on the top of the chassis cover plate via a bearing. The bottom of the outer wall of the screw is rotatably disposed on the middle of the second support plate via a bearing. The bottom of the screw rotatably extends out of the bottom of the second support plate. The push plate is screwed to the bottom of the outer wall of the screw. The rear side of the sleeve plate is rotatably sleeved on the outer wall of the push plate via a bearing. The axis of the push plate is the same as the axis of the second pulley. There are two third guide rods, which are respectively disposed on the top left and right sides of the push plate. The two third guide rods are slidably fitted into the inner cavities of the two guide cylinders. The motor is screwed to the top of the chassis cover plate. The top of the screw is locked to the output end of the motor via a coupling.

[0010] Preferably, a temperature sensor is provided at the bottom of the first bracket located on the rear side, and the temperature sensor, fan and motor are all electrically connected.

[0011] Preferably, when the server is in standby or low-load operation, the motor drives the screw to rotate, and the push plate drives the telescopic rod to slide along the rotating drum, thereby reducing the sliding stroke of the drive rod in the drive groove, so as to reduce the swing amplitude of the spoiler between adjacent fins. At the same time, the speed of the fan is reduced, and the swing frequency of the spoiler is reduced synchronously through the power component.

[0012] The computing server with a built-in cooling device proposed in this invention has the following advantages: 1. This invention drives the power component in the turbulence mechanism to rotate via the fan output shaft, and transmits the fan's rotational power to the second pulley via bevel gear reversal and belt drive, causing the drive rod to revolve around the axis of the second pulley. The drive rod converts the circular motion into the left-right reciprocating linear sliding of the first slider through the drive groove on the first slider, thereby causing the turbulence plate to swing synchronously in the gap between adjacent fins of the heat sink. The turbulence plate is driven by the fan's own power, eliminating the need for an additional high-power drive source. The structure is compact and the power transmission is efficient and reliable.

[0013] 2. This invention uses a baffle plate to compress the air in the gap on one side of the fin, creating a high-pressure zone. This high-pressure air is forced to be ejected at high speed through the nozzles on the baffle plate to the opposite side, forming a pulse jet that impacts the fin wall perpendicularly or obliquely. This jet directly penetrates and tears the laminar boundary layer that was originally attached to the fin surface, drawing the stationary air film into the main airflow. During the reciprocating swing of the baffle plate, the boundary layer on both sides of the fin surface is alternately subjected to high-frequency impacts and cannot thicken again. This fundamentally eliminates the main thermal resistance caused by the laminar boundary layer, transforming the slow heat conduction near the wall into a stronger heat transfer method based on forced convection, significantly improving the heat transfer efficiency of the heat sink.

[0014] 3. This invention achieves continuous stepless adjustment of the spoiler's oscillation amplitude by automatically reducing the fan speed as the load decreases, while simultaneously controlling the motor start via a temperature sensor feedback signal. The motor drives the telescopic rod to slide along the rotating drum via a screw and push plate. The spiral drive groove on the telescopic rod cooperates with the drive column inside the rotating drum to generate relative rotation, driving the gear to rotate and driving the rack to slide within the guide rail. This changes the radial distance between the drive rod and the shaft of the second pulley, enabling synchronous and stepless adjustment of the spoiler's oscillation frequency and fan speed, as well as independent and precise control of the oscillation amplitude. This allows the heat dissipation intensity to match the actual heat generation of the chip in real time. Under low load, the movement amplitude and frequency are actively reduced, effectively reducing mechanical wear and noise. Under high load, the amplitude and frequency are increased to ensure sufficient heat dissipation capacity, achieving adaptive heat dissipation optimization under all operating conditions.

[0015] 4. This invention features a brush with bristles at the bottom of the spoiler that contacts the fin surface. When the spoiler oscillates at high speed, the brush repeatedly mechanically sweeps the fin surface. Simultaneously, a pulse jet impacts the wall at high speed, generating strong shearing force. This peels off dust particles adhering to the fin surface and carries them away with the main airflow. The jet direction is perpendicular or oblique to the fin surface, effectively impacting the dead corner area at the fin root that is difficult to reach with traditional parallel airflow. This forms an active dust removal mechanism that combines mechanical sweeping and aerodynamic impact. It effectively prevents dust from accumulating on the fin surface and in the dead corner at the root, forming a thermal resistance layer. This slows down the decay of heat dissipation performance over time and reduces the frequency and cost of manual downtime maintenance.

[0016] 5. This device has the advantages of high structural integration, significantly improved heat dissipation efficiency, adaptive and adjustable turbulence intensity, active dust removal function, energy saving and noise reduction under low load, and small decay of heat dissipation performance over long-term operation. It provides a high-efficiency, intelligent and maintenance-free comprehensive heat dissipation solution for high-power servers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 Exploded view of the aerodynamic mechanism; Figure 4 This is a schematic diagram of the first support structure; Figure 5 To adjust the exploded view of the components; Figure 6 This is a schematic diagram of the drive column structure; Figure 7 for Figure 3 Enlarged view of point A; Figure 8 for Figure 5 Enlarged view of point B; Figure 9 for Figure 5 Enlarged view of point C.

[0018] In the diagram: 1. Server chassis; 2. Chassis cover; 3. Fan; 4. GPU; 5. Heatsink; 6. Baffle mechanism; 61. First bracket; 62. Slide; 63. Power assembly; 631. Power shaft; 632. Driving bevel gear; 633. Second bracket; 634. Rotating shaft; 635. Driven bevel gear; 636. First pulley; 637. Belt; 64. First guide rod; 65. First slider; 66. Baffle; 67. Perforation; 68. Drive slot; 69. Adjustment assembly; 691. First support plate; 692. Sleeve; 693. Second pulley; 694. Guide rail; 695. Moving groove; 696. Rack; 697. Second slider; 698. Drive rod; 699. Drive assembly; 6991. Rotary drum; 6992. Drive column; 6993. Gear; 6994. Telescopic rod; 6995. Helical drive groove; 6996. Sleeve plate; 6997. Second guide rod; 6998. Second support plate; 6999. Guide cylinder; 69910. Screw; 69911. Push plate; 69912. Third guide rod; 69913. Motor; 610. Temperature sensor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-9This invention provides a computing server technical solution with a built-in cooling device, including: a server chassis 1, a chassis cover 2, a fan 3, a GPU 4, a heat sink 5, and an airflow deflection mechanism 6. The motherboard is located at the bottom of the inner cavity of the server chassis 1. The server chassis 1 is existing technology and will not be described in detail here. The server chassis 1 provides a mounting base and electrical connection for the various electronic components inside the server, while also defining the flow path of the cooling airflow, allowing the airflow to flow through the heat-generating components in a preset direction. The chassis cover 2 is detachably mounted on the top of the server chassis 1, and is used to close the upper opening of the server chassis 1. Providing protection for internal components and serving as a mounting platform for fan 3 and the airflow mechanism 6, facilitating disassembly and assembly during overall assembly and maintenance, fan 3 is screwed to the front top of the inner cavity of the chassis cover 2. Fan 3 is existing technology and will not be described in detail here. Fan 3 is used to drive external cool air into the server chassis 1 and flow through the heat sink 5 when powered on, in order to generate the main cooling airflow required for forced convection heat transfer. At the same time, its output shaft serves as the power source for the airflow mechanism 6, providing driving force for the reciprocating motion of the airflow plate 66. GPU 4 is detachably mounted on the main board at the bottom of the inner cavity of the server chassis 1. GPU 4 is existing technology. The technology is technically sound, so I won't go into too much detail here. The GPU4 is one of the main heat-generating components inside the server, used to perform graphics calculations or general-purpose parallel computing tasks. It generates a large amount of heat during operation and is the primary cooling component of the server's cooling system. The heatsink 5 is attached to the top of the GPU4 with thermally conductive adhesive. The heatsink 5 consists of several parallel metal fins, designed to increase the heat exchange area with the air. It transfers the heat generated by the GPU4 to the fin surface through the thermally conductive adhesive, and then the cooling airflow flowing through the gaps between the fins carries the heat away. It is the intermediate medium for transferring heat from the chip to the air. The airflow turbulence mechanism 6 is located in the chassis. At the top of the inner cavity of the cover plate 2, the baffle mechanism 6 is used to drive the internal baffle plate 66 to reciprocate between adjacent fins of the heat sink 5 by the output power of the fan 3 when the fan 3 is running. By compressing the air to generate pulse jets, it actively breaks the laminar boundary layer on the surface of the fins to reduce thermal resistance and enhance convective heat transfer efficiency. At the same time, according to the feedback signal of the temperature sensor 610, the baffle plate 66’s swing amplitude and frequency are adaptively adjusted by the internal adjustment component 69 and drive component 699. During the movement, the baffle plate 66’s bottom brush cleans the fin surface, which also has the function of dust prevention and dust removal.

[0021] As a preferred embodiment, the aerodynamic mechanism 6 further includes: a first bracket 61, a slide groove 62, a power component 63, a first guide rod 64, a first slider 65, a spoiler 66, a perforation hole 67, a drive groove 68, an adjustment component 69, and a temperature sensor 610. Two first brackets 61 are provided, one on the front and one on the rear of the top of the inner cavity of the chassis cover 2. The bottom of each first bracket 61 has a slide groove 62 extending left and right. The first bracket 61 provides guiding support for the first slider 65's reciprocating sliding motion and also serves as the mounting base for the adjustment component 69 and the temperature sensor 610. The power component 63 is mounted on the output shaft of the fan 3, and the output of the fan 3 drives the power component 63 to rotate. 3 is used to transmit the rotational power output by fan 3 to adjustment component 69, which is the driving source for the reciprocating motion of spoiler 66. The left and right ends of the first guide rod 64 are respectively set on the left and right sides of the inner cavity of slide groove 62. The first guide rod 64 is used to pass through the top of the first slider 65, providing guidance and limiting for the left and right sliding of the first slider 65, ensuring the straightness and stability of the first slider 65 during sliding. The front and rear sides of the top of the first slider 65 are respectively slidably fitted into the inner cavity of the two slide grooves 62. The front and rear sides of the top of the first slider 65 are respectively slidably fitted into the outer wall of the two first guide rods 64. A driving groove 68 is opened in the middle of the top of the first slider 65 along the front and rear direction. The first slider 65 is used to move left and right under the drive of the driving rod 698. The device slides back and forth in a direction, causing the bottom of the device to move synchronously with the interference plates 66 fixedly connected to it. There are several interference plates 66. The tops of the interference plates 66 are equidistantly positioned at the bottom of the first slider 65 in the left and right directions. The bottoms of the interference plates 66 are inserted into the gaps between every two adjacent fins on the heat sink 5. Several through-holes 67 are opened on the left side of the interference plates 66. A brush is provided at the bottom of the interference plates 66, and the ends of the brush bristles are in contact with the surface of the heat sink 5. The interference plates 66 are used to move synchronously left and right in the gaps between the fins under the action of the first slider 65, generating a high-speed pulse jet by squeezing the air in the gaps to destroy the laminar boundary layer on the surface of the fins. Several through-holes 67 are opened on the interference plates 66. The micro-holes on the spoiler 66 allow high-pressure air to pass through and form a high-speed jet that is sprayed onto the surface of the opposite fins when the spoiler 66 moves to one side and compresses the air in the gap, thus achieving the function of directional impact on the boundary layer. The brush is used to mechanically sweep the surface of the fins during the reciprocating swing of the spoiler 66, brushing off the dust particles attached to the wall, and working in conjunction with the jet impact to achieve active dust removal. The adjustment component 69 is set between the two first supports 61. The adjustment component 69 is used to receive the rotational power transmitted by the power component 63 and drive the spoiler 66 to reciprocate. At the same time, the eccentricity of the drive rod 698 is changed by the drive component 699 inside it to achieve stepless adjustment of the swing amplitude of the spoiler 66. The temperature sensor 610 is set at the bottom of the first support 61 located on the rear side.Temperature sensor 610 is electrically connected to fan 3. Temperature sensor 610 is existing technology and will not be described in detail here. Temperature sensor 610 is used to detect the air temperature on the exhaust side of heatsink 5 and feed it back to the control system, providing the basis for adjusting the fan speed 3 and the oscillation amplitude of spoiler 66.

[0022] As a preferred embodiment, the power assembly 63 further includes: a power shaft 631, a driving bevel gear 632, a second bracket 633, a rotating shaft 634, a driven bevel gear 635, a first pulley 636, and a belt 637. The front end of the power shaft 631 is locked to the rear end of the output shaft of the fan 3 via a coupling. The power shaft 631 is used to transmit the rotational power generated by the output shaft of the fan 3 to the driving bevel gear 632, serving as the power input end of the entire turbulence mechanism 6. The driving bevel gear 632 is sleeved on the outside of the power shaft 631. The drive bevel gear 632 rotates synchronously with the power shaft 631 and transmits rotational power to the driven bevel gear 635 meshing with it, while changing the direction of rotational power transmission. The second bracket 633 is located at the top of the inner cavity of the housing cover 2. The second bracket 633 provides a rotatable support base for the rotating shaft 634, ensuring that the rotating shaft 634 maintains a stable axial and radial position during power transmission. The rotating shaft 634 is rotatably mounted in the inner cavity of the second bracket 633 via bearings. At the bottom center, the rotating shaft 634 is used to generate rotational motion under the drive of the driven bevel gear 635 and transmit power upward to the first pulley 636. It serves as an intermediate transition shaft for the transition of power from gear transmission to belt transmission. The driven bevel gear 635 is sleeved on the bottom of the outer wall of the rotating shaft 634 and locked by a set screw. The driving bevel gear 632 and the driven bevel gear 635 mesh with each other. The driven bevel gear 635 is used to receive the rotational power transmitted by the driving bevel gear 632 and change the direction of the rotation axis, driving the rotating shaft 634 synchronously. The first pulley 636 is sleeved on the top of the outer wall of the rotating shaft 634 and locked. The first pulley 636 is used to rotate synchronously under the drive of the rotating shaft 634, and transmits the rotational power to the second pulley 693 through the belt 637 sleeved on its outer wall, so as to realize the long-distance transmission of power from the front end to the rear end of the turbulence mechanism 6. One end of the belt 637 is sleeved on the outer wall of the first pulley 636. The belt 637 is used to transmit the rotational power of the first pulley 636 to the second pulley 693, so as to realize the flexible power transmission across the span.

[0023] As a preferred embodiment, the adjusting assembly 69 further includes: a first support plate 691, a sleeve 692, a second pulley 693, a guide rail 694, a moving groove 695, a rack 696, a second slider 697, a drive rod 698, and a drive assembly 699. The front and rear ends of the first support plate 691 are respectively disposed at the middle of the inner bottom ends of the two first supports 61. The first support plate 691 provides a rotatable support base for the sleeve 692 and also serves as a bearing platform for the second support plate 6998 and the guide cylinder 6999, connecting the two first supports 61 and enhancing the overall structural rigidity. The sleeve 692 is rotatably disposed within the inner cavity of the first support plate 691 via bearings. The sleeve 692 is used to support the second pulley 693. The rotational motion is transmitted upward to the drive assembly 699, and simultaneously serves as the mounting carrier for the rotating drum 6991 in the drive assembly 699, enabling the rotating drum 6991 to rotate synchronously with the second pulley 693. The second pulley 693 is located at the bottom end of the sleeve 692, and can be driven to rotate by the power assembly 63. The other end of the belt 637 is sleeved on the outer wall of the second pulley 693. The second pulley 693 is used to receive the rotational power transmitted by the belt 637 and serves as the total power input wheel for the reciprocating motion of the spoiler 66 and the eccentric rotation of the drive rod 698. The guide rail 694 is located at the middle of the bottom end of the second pulley 693. The bottom right side of the inner cavity of the guide rail 694 has a vertically penetrating moving groove 695 in the left-right direction. 694 provides a slidable insertion space for rack 696, constraining rack 696 to slide only in the left and right directions, and guiding the sliding trajectory of rack 696 to ensure the straightness and stability of rack 696 during movement. Rack 696 is slidably fitted into the right side of the inner cavity of guide rail 694. Rack 696 is used to slide left and right along guide rail 694 under the drive of gear 6993, thereby driving drive rod 698 to move left and right, changing the eccentricity between drive rod 698 and the axis of second pulley 693. There are two second sliders 697, which are respectively set at the bottom ends of the front and rear sides of rack 696. The second sliders 697 are slidably fitted into the inner cavity of guide rail 694. 7 is used to convert the sliding friction between the rack 696 and the guide rail 694 into low-resistance linear motion, ensuring the smoothness and reliability of the rack 696 during sliding. The drive rod 698 is located on the right side of the bottom end of the rack 696. The outer wall of the drive rod 698 is slidably fitted into the right side of the inner cavity of the moving groove 695. The bottom end of the drive rod 698 slidably extends out of the bottom end of the guide rail 694. The bottom end of the outer wall of the drive rod 698 is slidably fitted into the inner cavity of the drive groove 68. The drive rod 698 is used to revolve around its axis when the second pulley 693 rotates, and converts the revolve motion into the left-right reciprocating linear motion of the first slider 65 by inserting its bottom end into the drive groove 68. At the same time, when the rack 696 drives it to move left and right,The sway amplitude of the spoiler 66 is adjusted by changing its radial distance from the axis of the second pulley 693. The drive assembly 699 is located inside the sleeve 692. The drive assembly 699 receives control commands from the external motor 69913. Through the cooperation of its internal helical drive groove 6995 with the drive column 6992, the drive gear 6993 rotates and pushes the rack 696 to slide within the guide rail 694, thereby achieving stepless adjustment of the eccentricity of the drive rod 698.

[0024] As a preferred embodiment, the drive assembly 699 further includes: a rotating drum 6991, a drive column 6992, a gear 6993, a telescopic rod 6994, a helical drive groove 6995, a sleeve plate 6996, a second guide rod 6997, a second support plate 6998, a guide cylinder 6999, a screw 69910, a push plate 69911, a third guide rod 69912, and a motor 69913. The rotating drum 6991 is rotatably mounted on the bottom end of the inner cavity of the second pulley 693 via a bearing. The bottom end of the rotating drum 6991 rotatably extends beyond the bottom end of the second pulley 693. The rotating drum 6991 is used to rotate synchronously with the second pulley 693, and also serves as the mounting carrier for the drive column 6992 and the sliding guide sleeve for the telescopic rod 6994. 994 provides a sliding insertion space. Two drive posts 6992 are provided, located at the top left and right sides of the inner cavity of the rotating drum 6991. The drive posts 6992 are slidably inserted into the spiral drive grooves 6995 on the outer wall of the telescopic rod 6994. When the telescopic rod 6994 slides up and down along the rotating drum 6991, the drive posts 6992 and the inclined walls of the spiral drive grooves 6995 engage in a relative sliding fit, converting the linear motion of the telescopic rod 6994 into the rotational motion of the rotating drum 6991. This drives the gear 6993 to rotate. The gear 6993 is located at the bottom end of the rotating drum 6991 and meshes with a rack 696. The gear 6993 rotates synchronously with the rotating drum 6991 and converts the rotation... The motion is transmitted to the meshing rack 696, driving the rack 696 to slide left and right within the guide rail 694. The telescopic rod 6994 is slidably fitted into the inner cavity of the rotating drum 6991. The top end of the telescopic rod 6994 slidably extends out of the top end of the rotating drum 6991, and the bottom end of the telescopic rod 6994 slidably extends out of the bottom end of the gear 6993. Two helical drive grooves 6995 are equidistantly provided on the outer wall of the telescopic rod 6994 along the circumference. Two drive columns 6992 are slidably fitted into the inner cavities of the two helical drive grooves 6995. The telescopic rod 6994 is used to slide up and down along the rotating drum 6991 under the drive of the sleeve plate 6996, and through the cooperation of the helical drive grooves 6995 on its outer wall and the drive columns 6992, it moves its own... Linear sliding is converted into driving force for the rotation of the drive gear 6993. The bottom front side of the sleeve 6996 is set at the top of the telescopic rod 6994. The sleeve 6996 is used to connect the telescopic rod 6994 and the push plate 69911. When the push plate 69911 moves up and down, it drives the telescopic rod 6994 to slide up and down synchronously through the sleeve 6996. At the same time, the sleeve 6996 has only axial movement freedom under the constraint of the second guide rod 6997. There are two second guide rods 6997, which are respectively set on the left and right sides of the top of the second pulley 693. The left and right sides of the sleeve 6996 are slidably matched with the outer walls of the two second guide rods 6997. The second guide rods 6997 are used to form circumferential constraints on the sleeve 6996.The sleeve 6996 can only move up and down along the axial direction of the second guide rod 6997. The bottom left and right sides of the second support plate 6998 are respectively set on the top left and right sides of the first support plate 691. The second support plate 6998 serves as the mounting carrier for the guide cylinder 6999 and provides a rotatable support base for the bottom of the outer wall of the screw 69910. There are two guide cylinders 6999, which are respectively set on the bottom left and right sides of the second support plate 6998. The guide cylinders 6999 are used for the third guide rod 69912 to be slidably inserted into, providing guidance for the up and down movement of the push plate 69911 and constraining the push plate 69911 to move only along the axial direction and not rotate. The top of the outer wall of the screw 69910 is connected by a shaft. A bearing is rotatably mounted on the top of the chassis cover 2. The bottom of the outer wall of the screw 69910 is rotatably mounted on the middle of the second support plate 6998 via a bearing. The bottom end of the screw 69910 rotatably extends beyond the bottom end of the second support plate 6998. The screw 69910 is used to rotate under the drive of the motor 69913, and converts the rotational motion into the up-and-down linear motion of the push plate 69911 through a threaded engagement with the push plate 69911. The push plate 69911 is screwed to the bottom end of the outer wall of the screw 69910. The rear side of the sleeve plate 6996 is rotatably sleeved on the outer wall of the push plate 69911 via a bearing. The axis of the push plate 69911 is the same as the axis of the second pulley 693. The push plate 69911 is used to rotate the screw 69910. The push plate 69911 moves up and down axially and drives the telescopic rod 6994 to slide synchronously via the sleeve 6996. Since the sleeve 6996 is fitted onto the outer wall of the push plate 69911 via bearings, it can rotate freely around the axis of the push plate 69911 while moving up and down with it, avoiding interference with the rotational motion of the second pulley 693. Two third guide rods 69912 are provided, located on the left and right sides of the top of the push plate 69911 respectively. The two third guide rods 69912 are slidably fitted into the inner cavities of the two guide cylinders 6999. The third guide rods 69912 provide guidance and limit the up and down movement of the push plate 69911, preventing the push plate 69911 from moving up and down. 1. Following the rotation of screw 69910, the push plate 69911 is ensured to have only axial linear movement freedom. Motor 69913 is screwed to the top of the chassis cover plate 2. The top of screw 69910 is locked to the output end of motor 69913 via a coupling. Motor 69913 is electrically connected to temperature sensor 610. Motor 69913 is existing technology and will not be described in detail here. Motor 69913 is a servo motor connected to a servo controller. Motor 69913 is used to receive the temperature signal fed back by temperature sensor 610 as a control command. When motor 69913 starts, it drives screw 69910 to rotate, thereby driving push plate 69911 to move up and down, realizing remote automatic stepless adjustment of the swing amplitude of spoiler 66.

[0025] As a preferred option, when the server is in standby or low-load operation, the motor 69913 drives the screw 69910 to rotate, and drives the telescopic rod 6994 to slide along the rotating cylinder 6991 through the push plate 69911, so as to reduce the sliding stroke of the drive rod 698 in the drive groove 68, thereby reducing the swing amplitude of the spoiler 66 between adjacent fins. At the same time, the speed of the fan 3 is reduced, and the swing frequency of the spoiler 66 is reduced synchronously through the power component 63.

[0026] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0027] Step 1: During use, the output shaft of fan 3 begins to rotate, generating the main cooling airflow that penetrates the interior of server chassis 1. On the other hand, the output shaft of fan 3 directly drives the power shaft 631 to rotate synchronously through the coupling, outputting power to the turbulence mechanism 6. After the power shaft 631 rotates, it drives the active bevel gear 632 on its outer wall to rotate synchronously. The active bevel gear 632 transmits the rotational power to the driven bevel gear 635 that meshes with it, thereby driving the rotating shaft 634 to rotate in the inner cavity of the second bracket 633. When the rotating shaft 634 rotates, the first pulley 636, which is sleeved and locked at the top of its outer wall, rotates synchronously. After the first pulley 636 rotates, the rotational power is transmitted to the second pulley 693 through the belt 637 sleeved on its outer wall, thereby driving the second pulley 693 to rotate. Step 2: When the second pulley 693 rotates, the sleeve 692 and the guide rail 694 simultaneously rotate synchronously with the second pulley 693 around the same axis. When the guide rail 694 rotates, the rack 696 and the drive rod 698 that can be slidably inserted into the right side of its inner cavity will revolve around the axis of the second pulley 693. Step 3: When the drive rod 698 revolves around the axis of the second pulley 693, since the drive groove 68 is an elongated groove opened in the front-back direction, and the first slider 65 only has linear freedom in the left and right directions under the constraints of the sliding grooves 62 of the two first supports 61 and the first guide rod 64, the circular revolution of the drive rod 698 applies a horizontal component force to the first slider 65 through the groove wall of the drive groove 68. This component force drives the first slider 65 to slide back and forth linearly along the first guide rod 64. The interference flow plate 66 fixedly connected to the bottom of the first slider 65 then synchronously reciprocates left and right in the gap between every two adjacent fins on the heat sink 5. Step 4: As the spoiler 66 reciprocates between adjacent fins, the volume of the gap between it and the walls of the fins on both sides changes periodically. When the spoiler 66 approaches the left fin to the left, the gap on the left is compressed sharply, the air volume in the gap decreases, and the pressure rises sharply, forming a local high-pressure zone. Driven by the pressure, part of this high-pressure air escapes along the fin surface towards the main airflow direction, while the other part is ejected at high speed into the low-pressure zone on the right through several through-holes 67 on the left side of the spoiler 66. Since the flow cross-sectional area of ​​the through-holes 67 is much smaller than the gap cross-sectional area, according to the fluid continuity equation and Bernoulli's principle, the airflow is rapidly accelerated when passing through the through-holes, forming a pulse jet with extremely high velocity. After leaving the through-holes 67, this jet impacts the wall of the right fin perpendicularly or at a large angle, directly penetrating the original... The laminar boundary layer attached to the wall is nearly stationary. The kinetic energy of the high-speed jet is converted into a strong shear force on the boundary layer through impact. This physically tears, rolls up, and entrains the stationary air film in the laminar bottom layer into the main airflow. This forces the heat exchange mode, which originally relied on slow heat conduction between air molecules, to be transformed into an enhanced heat exchange mode dominated by convection. When the baffle 66 moves to the right, the compression and jet directions are completely reversed. The gap on the right is compressed to generate a high-pressure zone. The high-speed jet is ejected to the left through the jet hole 67 and then impacts the wall of the left fin. During the continuous reciprocating swing of the baffle 66, the laminar boundary layer on the surface of the fins on both sides is subjected to alternating, high-frequency jet impacts and can never be re-stabilized and thickened. This maintains an extremely thin boundary layer state on the entire fin surface, greatly reducing thermal resistance and significantly improving the heat exchange efficiency of the heat sink 5. Step 5: Simultaneously, sleeve 692 rotates synchronously with the second pulley 693. The rotation of sleeve 692 drives the rotating drum 6991 and gear 6993 to rotate synchronously, thereby causing gear 6993 to rotate synchronously with rack 696 and preventing rack 696 from shifting. At the same time, the rotation of the second pulley 693 can drive the sleeve plate 6996 to rotate through the second guide rod 6997. Since the axis of push plate 69911 is the same as the axis of the second pulley 693, the sleeve plate 6996 can be made to rotate along the axis of push plate 69911. Step 6: After the temperature sensor 610 detects the air temperature on the exhaust side of the heatsink 5, when the GPU4 is in standby or low-load operation, the air temperature flowing through the heatsink 5 drops significantly. The temperature sensor 610 feeds back the detected temperature signal to the control system, and the control system then outputs control commands. On the one hand, it reduces the speed of the output shaft of the fan 3. After the speed of the fan 3 is reduced, the speed of the second pulley 693 is reduced synchronously through the above power transmission link, thereby reducing the frequency of the left and right reciprocating motion of the spoiler 66 synchronously. On the other hand, the control system starts the motor 69913 at the same time. Step 7: After the motor 69913 starts, its output end drives the screw 69910 to rotate via a coupling. Two third guide rods 69912, fixedly connected to the left and right sides of the top of the push plate 69911, are slidably inserted into the inner cavities of the two guide cylinders 6999. This structure provides circumferential constraint to the push plate 69911, preventing it from rotating with the screw 69910 and allowing it to move only axially up and down. Therefore, when the screw 69910 rotates, the push plate 69911 moves downwards along the axial direction of the screw 69910. When moving downwards, the rear side of the sleeve 6996 is rotatably sleeved on the outer wall of the push plate 69911 via a bearing, and the front side of the bottom end of the sleeve 6996 is fixedly connected to the top end of the telescopic rod 6994. At the same time, the left and right sides of the sleeve 6996 are slidably sleeved on the outer walls of the two second guide rods 6997 respectively. The second guide rods 6997 form a circumferential constraint on the sleeve 6996, so that it can only move up and down along the axial direction. Therefore, when the push plate 69911 moves downwards, it drives the telescopic rod 6994 to slide downwards along the inner cavity of the rotating cylinder 6991. Step 8: When the telescopic rod 6994 slides downward, the two spiral drive grooves 6995 circumferentially opened on its outer wall and the two drive columns 6992 fixedly set at the top of the left and right sides of the inner cavity of the rotating drum 6991 produce a relative sliding engagement. The inclined groove wall of the spiral drive groove 6995 generates a lateral thrust on the drive column 6992, thereby causing the rotating drum 6991 to drive the gear 6993 to rotate counterclockwise. When the gear 6993 rotates counterclockwise, since the gear 6993 and the rack 696 remain meshed, the rotation of the gear 6993 drives the rack 696 to slide to the left along the guide rail 694. When the rack 696 slides to the left, its bottom end The drive rod 698, which is fixedly connected on the right, moves to the left. This movement directly reduces the radial distance between the drive rod 698 and the axis of the second pulley 693, that is, it reduces the eccentricity. When the center of the drive rod 698 coincides with the center of the second pulley 693, the eccentricity is zero, the first slider 65 no longer produces left and right displacement, and the spoiler 66 stops swinging. During this process, the movement stroke of the drive rod 698 is affected by the groove wall of the drive groove 68, which reduces the amplitude of the horizontal component force applied to the first slider 65 when the drive rod 698 revolves in a circle, thereby realizing the continuous and stepless reduction of the swing amplitude of the spoiler 66. Step 9: Through the combined effect of the fan 3 speed reduction and the motor 69913 driving the push plate 69911 to move downward, the swing frequency and swing amplitude of the spoiler 66 are reduced while the server is running. When the GPU4 is in standby or low load state, the heat dissipation demand is reduced. At this time, reducing the swing frequency and swing amplitude of the spoiler 66 can effectively reduce unnecessary mechanical movement, reduce the frictional energy consumption between the spoiler 66 and the air and the mechanical wear of the entire transmission chain, and reduce the noise generated by the movement, thus achieving an adaptive balance between heat dissipation performance and energy saving and quiet operation. Step 10: When the spoiler 66 does not need to swing, the motor 69913 continues to drive the push plate 69911 to move down, so that the center of the drive rod 698 is completely aligned with the center of the second pulley 693. At this time, the eccentricity is zero, the first slider 65 no longer produces left and right displacement, the surface of the spoiler 66 is parallel to the airflow direction, at this time the area of ​​the spoiler 66 blocking the main airflow is the smallest, the wind resistance is reduced to the minimum, and the cooling airflow generated by the fan 3 can pass through the heat sink 5 with the minimum resistance. Step 11: In servers that operate for extended periods, dust particles in the air, transported by fan 3, will enter the gaps between the fins of heatsink 5 with the airflow. In traditional air cooling, dust particles are often captured by the static air film of the laminar boundary layer and gradually accumulate on the surface and root corners of the fins due to gravity settling or electrostatic adsorption, forming dust cakes with extremely high thermal resistance. In this solution, when the pulse jet impacts the fin wall at high speed, the instantaneous dynamic pressure applied by the jet to the wall generates extremely strong wall shearing force. This shearing force acts on the dust particles attached to the wall. When the drag force generated by the jet velocity is greater than the van der Waals force and electrostatic force between the dust particles and the wall, the dust particles are forcibly stripped away. The jet from the nozzle 67 is carried away from the wall surface by the jet and the main airflow. In addition, the jet direction of the jet is perpendicular or oblique to the fin surface, which can effectively impact the dead corner area at the root of the fin that is difficult to reach by traditional parallel airflow. This loosens and drives away the stubborn dust accumulated in the corner. The high-speed reciprocating swing of the baffle 66 drives the brush at its bottom to mechanically sweep the fin surface. The contact cleaning of the brush and the aerodynamic impact of the jet form a "mechanical-aerodynamic" synergistic dust removal effect, ensuring that even in humid or high static electricity environments, dust is difficult to form a stable adhesion layer on the fin surface. This maintains the long-term low thermal resistance of the heat sink 5, delays the decay of heat dissipation performance, and reduces the frequency of manual maintenance.

[0028] This device boasts advantages such as high structural integration, significantly improved heat dissipation efficiency, adaptively adjustable turbulence intensity, active dust removal function, energy saving and noise reduction under low load, and minimal heat dissipation performance degradation over long-term operation. It provides a comprehensive heat dissipation solution for high-power servers that is efficient, intelligent, and maintenance-free.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A computing server with a built-in cooling device, characterized in that, include: Server chassis (1), the bottom of the inner cavity of the server chassis (1) is provided with a motherboard; Chassis cover (2), which is detachably mounted on the top of the server chassis (1); Fan (3), the fan (3) is screwed to the front side of the top of the inner cavity of the chassis cover (2); GPU (4), which is detachably mounted on the main board at the bottom of the inner cavity of the server chassis (1); Heat sink (5), which is attached to the top of GPU (4) with thermal adhesive; A turbulence-disrupting mechanism (6) is located at the top of the inner cavity of the chassis cover plate (2).

2. A computing server with a built-in cooling device according to claim 1, characterized in that: The disturbance mechanism (6) includes: The first bracket (61) has two components. The two first brackets (61) are respectively located on the front and rear sides of the top of the inner cavity of the chassis cover plate (2). The bottom end of the first bracket (61) is provided with a sliding groove (62) in the left and right direction. The power assembly (63) is mounted on the output shaft of the fan (3) and the output end of the fan (3) drives the power assembly (63) to rotate. The first guide rod (64) has its left and right ends respectively located on the left and right sides of the inner cavity of the slide groove (62); The first slider (65) has its top end and front and back sides slidably fitted into the inner cavity of the two slide grooves (62). The top end and front and back sides of the first slider (65) are slidably fitted into the outer wall of the two first guide rods (64). A drive groove (68) is provided in the middle of the top end of the first slider (65) along the front and back direction. The number of the baffles (66) is several. The top ends of the baffles (66) are equidistantly arranged at the bottom end of the first slider (65) along the left and right directions. The bottom ends of the baffles (66) are inserted into the gap between every two adjacent fins on the heat sink (5). The left side of the baffles (66) is provided with several through holes (67). An adjustment component (69) is disposed between two first supports (61).

3. A computing server with a built-in cooling device according to claim 2, characterized in that: The bottom end of the baffle (66) is provided with a brush, and the ends of the brush bristles are in contact with the surface of the heat sink (5).

4. A computing server with a built-in cooling device according to claim 3, characterized in that: The adjustment component (69) includes: The first support plate (691) is located at the middle of the inner bottom of the two first brackets (61), with its front and rear ends respectively. Sleeve (692), which is rotatably disposed in the inner cavity of the first support plate (691) via a bearing; The second pulley (693) is located at the bottom end of the sleeve (692) and can be driven to rotate by the power assembly (63); The guide rail (694) is located at the bottom center of the second pulley (693). The guide rail (694) has a vertically penetrating moving groove (695) on the right side of the bottom of the inner cavity of the guide rail (694) along the left and right direction. A rack (696) is slidably and compatiblely inserted into the right side of the inner cavity of the guide rail (694); The second slider (697) has two components. The two second sliders (697) are respectively located at the bottom ends of the front and rear sides of the rack (696). The second sliders (697) are slidably and compatiblely inserted into the inner cavity of the guide rail (694). A drive rod (698) is located on the right side of the bottom end of the rack (696). The outer wall of the drive rod (698) is slidably adapted to be inserted into the right side of the inner cavity of the moving groove (695). The bottom end of the drive rod (698) slidably extends out of the bottom end of the guide rail (694). The bottom end of the outer wall of the drive rod (698) is slidably adapted to be inserted into the inner cavity of the drive groove (68). A drive assembly (699) is disposed in the inner cavity of the sleeve (692).

5. A computing server with a built-in cooling device according to claim 4, characterized in that: The drive component (699) includes: A rotating drum (6991) is rotatably disposed at the bottom end of the inner cavity of the second pulley (693) via a bearing, and the bottom end of the rotating drum (6991) extends rotatably out of the bottom end of the second pulley (693). The number of drive columns (6992) is two, and the two drive columns (6992) are respectively disposed at the top of the left and right sides of the inner cavity of the rotating drum (6991); Gear (6993), the gear (6993) is disposed at the bottom end of the rotating drum (6991), and the gear (6993) meshes with the rack (696); A telescopic rod (6994) is slidably and compatiblely inserted into the inner cavity of a rotating cylinder (6991). The top end of the telescopic rod (6994) slidably extends out of the top end of the rotating cylinder (6991), and the bottom end of the telescopic rod (6994) slidably extends out of the bottom end of a gear (6993). Two helical drive grooves (6995) are equidistantly provided on the outer wall of the telescopic rod (6994) along the circumferential direction. Two drive columns (6992) are slidably and compatiblely inserted into the inner cavities of the two helical drive grooves (6995). A sleeve plate (6996) is provided at the front of the bottom end of the sleeve plate (6996) at the top of the telescopic rod (6994); The second guide rod (6997) has two parts. The two second guide rods (6997) are respectively set on the left and right sides of the top of the second pulley (693). The left and right sides of the sleeve plate (6996) are respectively slidably matched with the outer walls of the two second guide rods (6997).

6. A computing server with a built-in cooling device according to claim 5, characterized in that: The drive component (699) also includes: The second support plate (6998) has its bottom left and right sides respectively located on the top left and right sides of the first support plate (691); Guide cylinder (6999), there are two guide cylinders (6999), and the two guide cylinders (6999) are respectively disposed on the left and right sides of the bottom end of the second support plate (6998); The top of the outer wall of the screw (69910) is rotatably mounted on the top of the chassis cover plate (2) via a bearing, and the bottom of the outer wall of the screw (69910) is rotatably mounted on the middle of the second support plate (6998) via a bearing. The bottom end of the screw (69910) extends rotatably out of the bottom end of the second support plate (6998). Push plate (69911), which is screwed to the bottom of the outer wall of screw (69910), and sleeve plate (6996) is rotatably sleeved on the outer wall of push plate (69911) through bearing. The axis of push plate (69911) is the same as the axis of second pulley (693). The third guide rod (69912) has two parts. The two third guide rods (69912) are respectively set on the left and right sides of the top of the push plate (69911). The two third guide rods (69912) are slidably adapted to be inserted into the inner cavity of the two guide cylinders (6999). The motor (69913) is screwed to the top of the chassis cover plate (2), and the top of the screw (69910) is locked to the output end of the motor (69913) by a coupling.

7. A computing server with a built-in cooling device according to claim 6, characterized in that: A temperature sensor (610) is provided at the bottom of the first bracket (61) located on the rear side. The temperature sensor (610), fan (3) and motor (69913) are all electrically connected.

8. A computing server with a built-in cooling device according to claim 7, characterized in that: When the server is in standby or low-load operation, the motor (69913) drives the screw (69910) to rotate, and drives the telescopic rod (6994) to slide along the drum (6991) through the push plate (69911), so that the sliding stroke of the drive rod (698) in the drive groove (68) is reduced, thereby reducing the swing amplitude of the spoiler (66) between adjacent fins. At the same time, the speed of the fan (3) is reduced, and the swing frequency of the spoiler (66) is synchronously reduced through the power component (63).

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