Dual-fan arrangement

Abstract

This application discloses a dual-fan device, relating to the field of fan heat dissipation technology. The device includes a substrate and two fan units; each fan unit includes a fan shroud, a fan, and a baffle assembly; the fan shroud is disposed on the substrate, with a first heat dissipation hole in a portion of a first side surface and a second heat dissipation hole in at least a portion of a second side surface; the fan is disposed inside the fan shroud; the baffle assembly includes a first baffle, a second baffle, and a transmission baffle; the first baffle is used to block or unblock the first heat dissipation hole; the second baffle is used to block or unblock the second heat dissipation hole; by rotating the first baffle away from the first side surface, it abuts against one end of the transmission baffle, causing the first baffle to rotate and the other end of the transmission baffle to abut against the second baffle, locking the position of the second baffle; by rotating the first baffle closer to the first side surface, it disengages from the transmission baffle, releasing the transmission baffle from locking the position of the second baffle.

Description

Technical Field

[0001] This application relates to the field of fan cooling technology, and more specifically, to a dual-fan device. Background Technology

[0002] In equipment that generates significant heat, dual or multiple fan configurations are often used to improve cooling capacity. The inventors of this application have discovered that when not all dual or multiple fans are operating, and only a few are running, the operating fans exhaust heat to the outside of the equipment. Due to air pressure differences, some of the hot air exhausted to the outside of the equipment will re-enter the equipment through the non-operating fans, affecting the equipment's heat dissipation performance. Furthermore, it can bring dust and other external impurities into the equipment, shortening its lifespan.

[0003] The content in the background section is merely technology known to the public and does not necessarily represent existing technology in this field. Summary of the Invention

[0004] This application aims to provide a dual-fan device to solve at least one of the above-mentioned technical problems.

[0005] According to an embodiment of this application, a dual-fan device is provided. The dual-fan device includes a base plate and two fan units; the two fan units have identical structures and configurations, one of which includes a fan shroud, a fan, and a baffle assembly; the fan shroud is disposed on the base plate, a first heat dissipation hole is provided in a portion of a first side of the fan shroud, and a second heat dissipation hole is provided in at least a portion of a second side; the fan is disposed inside the fan shroud; the baffle assembly includes a first baffle, a second baffle, and a transmission baffle; the first baffle is disposed on the base plate via a vertically oriented transmission shaft, and is capable of rotating relative to the base plate to block or unblock the first heat dissipation hole; the second ... A directional drive shaft is mounted on the substrate and can rotate relative to the substrate to block or unblock the second heat dissipation hole; a drive baffle is mounted on the substrate via a vertical drive shaft and can rotate relative to the substrate; when the first baffle rotates away from the first side and abuts against one end of the drive baffle, the first baffle drives the drive baffle to rotate, causing the other end of the drive baffle to abut against the second baffle, thereby locking the position of the second baffle; when the first baffle rotates towards the first side and releases contact with the drive baffle, the drive baffle releases the locking of the position of the second baffle.

[0006] According to the technical solution of this application, when not all fans are running, the heat dissipation holes of the non-running fans can be blocked. The hot air discharged from the fan shrouds of the running fans cannot enter the equipment through the heat dissipation holes of the non-running fans, thereby improving the heat dissipation effect of the equipment. Furthermore, impurities outside the fan shrouds cannot enter the equipment through the heat dissipation holes of the non-running fans, extending the service life of the equipment. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This diagram shows a structural schematic of a dual-fan device according to an embodiment of the present application; Figure 2 This diagram shows the internal structure of the fan shroud in a dual-fan device according to an embodiment of the present application. Figure 3 This diagram shows the internal structure of a dual-fan device according to an embodiment of the present application; Figure 4 This diagram shows a structural schematic of a second baffle according to an embodiment of the present application; Figure 5 A schematic diagram showing the distribution of a first position, a second position, and a third position on a substrate according to an embodiment of this application is provided. Figure 6 A schematic diagram of a drive shaft structure according to an embodiment of this application is shown; Figure 7 A schematic diagram of a first torsion spring structure according to an embodiment of this application is shown; Figure 8 This diagram shows a schematic representation of a first baffle structure according to an embodiment of the present application; Figure 9 This diagram shows a first mounting boss structure according to an embodiment of the present application; Figure 10 This diagram shows a second mounting boss structure according to an embodiment of the present application; Figure 11 A schematic diagram of a transmission baffle structure according to an embodiment of this application is shown; Figure 12 This diagram shows a third mounting boss structure according to an embodiment of the present application; Figure 13 A schematic diagram of a second torsion spring structure according to an embodiment of this application is shown; Figure 14A schematic diagram of a bushing structure according to an embodiment of this application is shown; Figure 15 This diagram illustrates a fan in a non-operational state according to an embodiment of the present application. Figure 16 This diagram illustrates the state of a fan starting operation and when the wind force is low, according to an embodiment of this application. Figure 17 A schematic diagram showing the normal operating state of a fan according to an embodiment of this application is provided.

[0009] Explanation of reference numerals in the attached figures: 1. Substrate; 11. First position; 12. Second position; 13. Third position; 14. Air inlet; 2. Fan unit; 21. Fan cover; 211. First side panel; 2111. First heat dissipation hole; 212. Second side panel; 2121. Second heat dissipation hole; 213. Third side panel; 214. Fourth side panel; 215. Fan mounting bracket; 22. Fan; 23. Baffle assembly; 231. First baffle; 2311. First mounting boss; 23111. First baffle mounting hole; 23112. Second torsion spring mounting hole; 23113. Second torsion spring limiting groove; 232. Second baffle; 2 321. Second mounting boss; 23211. Second baffle mounting hole; 23212. Third torsion spring mounting hole; 23213. Third torsion spring limiting groove; 2322. Wind shield; 2323. Limiting plate; 233. Transmission baffle; 2331. Third mounting boss; 23311. Third baffle mounting hole; 23312. Fourth torsion spring mounting hole; 23313. Fourth torsion spring limiting groove; 2332. Locking plate; 2333. Connecting plate; 2334. Anti-shake plate; 2335. Abutment plate; 3. Drive shaft; 31. First torsion spring; 311. First limiting spring; 312. Second limiting spring; 33. Shaft; 331. First end; 332. Second end; 34. Torsion spring boss; 341. First torsion spring mounting hole; 342. First torsion spring limiting groove; 35. Second torsion spring; 351. Third limiting spring; 352. Fourth limiting spring; 4. Protective cover; 41. Third heat dissipation hole; 5. Bushing; 51. Shaft through hole; 52. Mounting hole; 53. Fifth torsion spring mounting hole; 54. Fifth torsion spring limiting groove. Detailed Implementation

[0010] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0011] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0012] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0013] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.

[0014] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0015] In existing technologies, a fan is a type of driven fluid machinery. A fan relies on input mechanical energy to increase gas pressure and discharge gas. Fans are widely used in various industries for ventilation and heat dissipation of equipment.

[0016] In equipment that generates significant heat, dual or multiple fan configurations are often used to improve cooling capacity. The inventors discovered that when not all dual or multiple fans are running—for example, in low-temperature winter conditions where not all fans need to operate, or when at least one fan malfunctions—the operating fans exhaust heat to the outside of the equipment. Due to air pressure differences, some of the hot air exhausted to the outside can re-enter the equipment through the non-operating fans, affecting its heat dissipation performance. Furthermore, it can bring dust and other external impurities into the equipment, shortening its lifespan.

[0017] Therefore, this application provides a dual-fan device. By incorporating a baffle assembly, when the fans are started, the baffle assembly can release the blockage of the heat dissipation holes on the fan shroud, allowing hot air to be discharged to the outside of the equipment through the heat dissipation holes, thus cooling the equipment.

[0018] When the fan stops running, the baffle assembly seals the heat dissipation vents of the fan shroud, preventing hot air exhausted from other running fans from entering the equipment through the heat dissipation vents of the stopped fan's external shroud. This improves the fan's heat dissipation performance. Simultaneously, it reduces the entry of external impurities into the equipment, extending its service life.

[0019] Please refer to the above. Figures 1 to 3 , Figure 1 A schematic diagram of a dual-fan device according to an embodiment of this application is shown. Figure 2 A schematic diagram of the internal structure of the fan shroud in a dual-fan device according to an embodiment of this application is shown. Figure 3 A schematic diagram of the internal structure of a dual-fan device according to an embodiment of this application is shown.

[0020] According to an example embodiment, this application provides a dual-fan device. For example... Figure 1 As shown, the dual-fan device includes a base plate 1 and two fan units 2 disposed on the base plate 1.

[0021] In this embodiment, substrate 1 specifically refers to a plate-like structure that serves to bear and support loads. For example, in this embodiment, two fan units 2 are disposed on substrate 1. Substrate 1 is connected to the two fan units 2, and substrate 1 provides bearing and support for the two fan units 2.

[0022] like Figure 2 As shown, in this embodiment of the application, fan unit 2 specifically refers to a device that integrates fan 22 with other components to realize airflow conveying. The two fan units 2 have the same structure and configuration, and one of the fan units 2 includes a fan cover 21, a fan 22 and a baffle assembly 23.

[0023] In this embodiment of the application, the fan cover 21 specifically refers to a component installed at the air inlet or air outlet of the fan 22, which serves to block debris from entering the fan 22 and the equipment, and to assist in airflow guidance.

[0024] Specifically, the fan cover 21 is disposed on the substrate 1. The specific structure of the fan cover 21 is not limited in this embodiment; it can be a structure capable of blocking debris and assisting in airflow guidance. For example, the specific structure of the fan cover 21 can be an open-type box formed by multiple side panels connected end-to-end and a top surface connected to all the side panels. In this embodiment, an example is given of a fan cover 21 having an open-type box formed by four side panels connected end-to-end and a top surface connected to all four side panels.

[0025] The opening of the open-type housing is connected to the air inlet of the substrate 1, and the air inlet of the substrate 1 is connected to the air outlet of the equipment. When the fan 22 is running, the generated cold airflow comes into contact with the equipment, absorbs the heat emitted by the equipment, and then becomes hot airflow, which enters the interior of the fan cover 21 through the air outlet of the equipment and the air inlet of the substrate 1. The hot airflow then flows to the outside of the fan cover 21 through the heat dissipation holes, thus achieving heat dissipation for the equipment.

[0026] like Figure 2 As shown in the example embodiment, the four connected sides of the fan cover 21 are the first side 211, the second side 212, the third side 213, and the fourth side 214.

[0027] A portion of the first side 211 is provided with a first heat dissipation hole 2111, at least a portion of the second side 212 is provided with a second heat dissipation hole 2121, and no heat dissipation holes are provided on the third and fourth sides.

[0028] In this embodiment of the application, a portion of the first side surface 211 is provided with a first heat dissipation hole 2111. Specifically, the first heat dissipation hole 2111 is provided in a local area of ​​the first side surface 211.

[0029] At least a portion of the second side surface 212 is provided with second heat dissipation holes 2121. In this embodiment, this specifically means that a partial area of ​​the second side surface 212 is provided with second heat dissipation holes 2121, or the entire area of ​​the second side surface 212 is provided with second heat dissipation holes 2121. In this embodiment, the entire area of ​​the second side surface 212 is provided with second heat dissipation holes 2121 as an example, which provides better heat dissipation for the device.

[0030] The function of the fan 22 is to drive the airflow in a specific direction. The fan 22 is located inside the fan cover 21. Specifically, a fan mounting bracket 215 is provided inside the fan cover 21, and the fan 22 is mounted on the fan mounting bracket 215.

[0031] When the fan 22 is running, it causes cold air to flow over the surface of the equipment. The cold air absorbs the heat emitted by the equipment and becomes hot air. The hot air enters the interior of the fan cover 21 through the air outlet of the equipment and the air inlet of the base plate 1. The hot air then flows to the outside of the fan cover 21 through the heat dissipation holes, thus achieving heat dissipation for the equipment.

[0032] In this embodiment, the baffle assembly 23 specifically refers to a functional module for guiding and blocking airflow, composed of multiple components such as a baffle body, a support or rotating shaft, a limiting device, or a seal. Specifically, the baffle assembly 23 includes a first baffle 231, a second baffle 232, and a transmission baffle 233.

[0033] The first baffle 231 is mounted on the substrate 1 via a vertical transmission shaft 3 and can rotate relative to the substrate 1 to block or unblock the first heat dissipation hole 2111.

[0034] The second baffle 232 is mounted on the base plate 1 via a vertical transmission shaft 3 and can rotate relative to the base plate 1 to block or unblock the second heat dissipation hole 2121.

[0035] The transmission baffle 233 is mounted on the base plate 1 via a vertical transmission shaft 3 and can rotate relative to the base plate 1.

[0036] When the first baffle 231 rotates away from the first side 211 and comes into contact with one end of the transmission baffle 233, the first baffle 231 drives the transmission baffle 233 to rotate, so that the other end of the transmission baffle 233 comes into contact with the second baffle 232, thereby locking the position of the second baffle 232.

[0037] When the first baffle 231 rotates toward the first side 211 and is no longer in contact with the transmission baffle 233, the transmission baffle 233 releases its locking of the position of the second baffle 232.

[0038] When the fan is running, the first baffle 231 rotates away from the first side 211 under the thrust of the wind, releasing the blockage of the first heat dissipation hole 2111. At the same time, during the rotation, the first baffle 231 abuts against one end of the transmission baffle 233, and the first baffle 231 drives the transmission baffle 233 to rotate, so that the other end of the transmission baffle 233 abuts against the second baffle 232, thereby locking the second baffle 232 in the position where the blockage of the second heat dissipation hole 2121 is released.

[0039] refer to Figure 15 , Figure 15 A schematic diagram of a fan not in operation according to an embodiment of this application is shown.

[0040] like Figure 15As shown, when the fan stops running, the first baffle 231 is not subjected to the thrust of the wind. The first baffle 231 rotates back to the position where it is in contact with the first side 211, sealing the first heat dissipation hole 2111. At the same time, when the first baffle 231 disengages from the transmission baffle 233 during rotation, the transmission baffle 233 releases its locking of the position of the second baffle 232. The second baffle 232 rotates back to the position where it is in contact with the second side 212, sealing the second heat dissipation hole 2121.

[0041] In the above embodiments, when not all fans 22 are running, the heat dissipation holes of the non-running fans 22 can be blocked. The hot air discharged from the fan shroud 21 of the running fans 22 cannot enter the equipment through the heat dissipation holes of the non-running fans 22, thus improving the heat dissipation effect of the equipment. Furthermore, impurities outside the fan shroud 21 cannot enter the equipment through the heat dissipation holes of the non-running fans 22, extending the service life of the equipment.

[0042] In the embodiments of this application, such as Figure 2 and Figure 3 As shown, in accordance with the rotation path of the first baffle 231, a first heat dissipation hole 2111 is provided in the area of ​​the first side 211 away from the second side 212. When the first baffle 231 rotates away from the first side 211, the airflow generated by the rotation of the fan 22 is discharged to the outside of the fan cover 21 through the first heat dissipation hole 2111.

[0043] The second side 212 has a second heat dissipation hole 2121 at least in the area near the connection position with the first side 211.

[0044] During the operation of the baffle assembly 23, the airflow generated by the rotation of the fan 22 blows towards the first baffle 231 through the first heat dissipation hole 2111, causing the first baffle 231 to rotate away from the first side 211. The first baffle 231 releases the blockage of the first heat dissipation hole 2111 on the first side 211, and then the airflow is discharged to the outside of the fan cover 21 through the first heat dissipation hole 2111.

[0045] Simultaneously, the airflow generated by the rotation of the fan 22 also passes through the second heat dissipation hole 2121 and blows towards the second baffle 232, causing the second baffle 232 to rotate away from the second side 212. The second baffle 232 releases the blockage of the second heat dissipation hole 2121 on the second side 212, and the airflow is discharged to the outside of the fan cover 21 through the second heat dissipation hole 2121.

[0046] In the prior art, the opening and closing of the heat dissipation holes on the fan cover 21 cannot be adaptively controlled, and the heat dissipation holes need to be blocked or unblocked by a baffle controlled by a motor.

[0047] In the above embodiments, the airflow generated by the fan 22 overcomes the resistance of the baffle assembly 23, pushing the baffle assembly 23 open and allowing hot airflow to flow through the heat dissipation holes to the outside of the fan cover 21, thus achieving heat dissipation. The embodiments of this application do not require additional sensors and motors to control the baffle assembly 23, simplifying the structure and reducing manufacturing and maintenance costs.

[0048] refer to Figure 4 , Figure 4 A schematic diagram of the structure of a second baffle according to an embodiment of this application is shown.

[0049] In the embodiments of this application, such as Figure 3 As shown, the transmission baffle 233 includes a locking plate 2332, a connecting plate 2333, a vibration damping plate 2334, and an abutment plate 2335.

[0050] The locking plate 2332 serves to fix the position of the second baffle 232. The specific shape of the locking plate 2332 is not limited in this embodiment; it can be any structure capable of applying force to other components. For example, the locking plate 2332 can be rectangular, trapezoidal, rhomboid, semi-circular, etc. This embodiment uses a rectangular locking plate 2332 as an example for illustration.

[0051] The locking plate 2332 can abut against the second baffle 232 so that a portion of the structure of the second baffle 232 abuts against the area on the first side 211 away from the first heat dissipation hole 2111.

[0052] Specifically, such as Figure 4 As shown, the second baffle 232 includes a wind shield 2322 and a limiting plate 2323 connected together. The wind shield 2322 is used to block or unblock the second heat dissipation hole 2121. During rotation, the limiting plate 2323 contacts the locking plate 2332, and the locking plate 2332 abuts against the area on the first side 211 away from the first heat dissipation hole 2111, thereby locking the position of the second baffle 232 by the locking plate 2332.

[0053] The function of the connecting plate 2333 is to connect two or more other components so that the connected components can coordinate their movements. In the embodiments of this application, one end of the connecting plate 2333 is connected to the locking plate 2332, and the other end is connected to the anti-shake plate 2334, so that the locking plate 2332 and the anti-shake plate 2334 can coordinate their movements.

[0054] The anti-shake plate 2334 is connected to the other end of the connecting plate 2333. The shape of the anti-shake plate 2334 facing the first side 211 is the same as the rotation path of the end of the first baffle 231 facing the anti-shake plate 2334. Since the length of the first baffle 231 remains unchanged during rotation, the rotation path of the first baffle 231 is a part of a circle; correspondingly, the shape of the anti-shake plate 2334 facing the first side 211 is a concave curved surface. The connection between the first baffle 231 and the anti-shake plate 2334 is a sliding connection.

[0055] The function of the abutment plate 2335 is to abut against the first baffle 231. Specifically, the abutment plate 2335 is connected to the end of the anti-shake plate 2334 away from the connecting plate 2333, and the abutment plate 2335 and the end of the anti-shake plate 2334 away from the connecting plate 2333 together form a bent structure, thereby enabling it to abut against the rotating first baffle 231.

[0056] Please refer to the above. Figure 16 and Figure 17 , Figure 16 This diagram illustrates the state of a wind turbine starting up and when the wind force is low, according to an embodiment of this application. Figure 17 A schematic diagram of the normal operating state of a wind turbine according to an embodiment of this application is shown.

[0057] During the operation of the transmission baffle 233, such as Figure 2 , Figure 16 and Figure 17 As shown, the first baffle 231 rotates away from the first side 211 and abuts against the abutment plate 2335. Subsequently, the first baffle 231 drives the transmission baffle 233 to rotate, so that the locking plate 2332 of the transmission baffle 233 abuts against the second baffle 232, so that the limiting plate 2323 of the second baffle 232 abuts against the area on the first side 211 away from the first heat dissipation hole 2111, thereby locking the position of the second baffle 232 by the locking plate 2332.

[0058] When the first baffle 231 rotates toward the first side 211 and is no longer in contact with the transmission baffle 233, the locking plate 2332 of the transmission baffle 233 releases its contact with the limiting plate 2323 of the second baffle 232, and thus the locking plate 2332 of the transmission baffle 233 releases its locking of the position of the second baffle 232.

[0059] When the airflow from the fan shroud 21 outside the operating fan 22 is relatively weak, the first baffle 231 rotates towards the first side 211, and the first baffle 231 does not abut against the abutment plate 2335. Since the shape of the anti-vibration plate 2334 facing the first side 211 is the same as the rotation path of the end of the first baffle 231 facing the anti-vibration plate 2334, during the sliding connection between the first baffle 231 and the anti-vibration plate 2334, the anti-vibration plate 2334 contacts the end of the first baffle 231, and the first baffle 231 provides support for the anti-vibration plate 2334. Therefore, the transmission baffle 233 as a whole does not rotate. The locking state of the locking plate 2332 on the second baffle 232 remains unchanged, and the second baffle 232 does not rotate.

[0060] In existing technology, when the wind force of the fan 22 decreases slightly, the baffle will rotate towards the side closer to the fan cover under the action of gravity or other forces; when the wind force of the fan 22 increases slightly, the baffle will rotate away from the fan cover under the action of the wind force. Therefore, when the wind force fluctuates within a certain range, the baffle will rotate continuously in opposite directions, leading to unstable heat dissipation of the equipment. Furthermore, the continuous rotation of the baffle in opposite directions can cause damage or even breakage of the baffle.

[0061] In the above embodiment, by setting the shape of the anti-shake plate 2334 facing the first side 211 to be the same as the rotation path of the end of the first baffle 231 facing the anti-shake plate 2334, during the rotation of the first baffle 231, within the range of sliding connection between the first baffle 231 and the anti-shake plate 2334, the anti-shake plate 2334 of the transmission baffle 233 is supported by the first baffle 231, thus the transmission baffle 233 as a whole does not rotate. The second baffle 232 is locked by the locking plate 2332 of the transmission baffle 233, so the second baffle 232 does not rotate. This makes the heat dissipation of the equipment more stable. At the same time, it also improves the situation where the transmission baffle 233 rotates continuously in opposite directions, leading to damage or even breakage of the transmission baffle 233.

[0062] As the wind force continues to decrease, the first baffle 231 and the anti-shake plate 2334 change from a sliding connection to a disengaged state. Without the support of the first baffle 231, the transmission baffle 233 rotates towards the first side 211. The locking plate 2332 of the transmission baffle 233 releases its contact with the limiting plate 2323 of the second baffle 232, thus releasing the locking plate 2332 from locking the position of the second baffle 232. The second baffle 232 rotates towards the second side 212 until it blocks the second heat dissipation hole 2121 on the second side 212.

[0063] refer to Figure 5 , Figure 5A schematic diagram showing the distribution of a first position, a second position, and a third position on a substrate according to an embodiment of this application is shown.

[0064] In the embodiments of this application, such as Figure 2 , Figure 3 and Figure 5 As shown, a drive shaft 3 is provided at a first position 11 on the substrate 1. The first position 11 is located on the same plane as the first side surface 211 and is far away from the second side surface 212.

[0065] Since the first heat dissipation hole 2111 is provided in the area of ​​the first side 211 away from the second side 212, the first position 11 is set in a position away from the second side 212. The first baffle 231 rotates around the transmission shaft 3 on the first position 11, which can block or unblock the first heat dissipation hole 2111 on the first side 211.

[0066] A drive shaft 3 is provided at a second position 12 on the substrate 1. The second position 12 is located on the same plane as the second side 212 and between the second side 212 and the locking plate 2332.

[0067] Since the second side 212 has a second heat dissipation hole 2121 at least near the connection point with the first side 211, the second position 12 is located between the second side 212 and the locking plate 2332. The wind shield 2322 and the limiting plate 2323 in the second baffle 232 are located on both sides of the drive shaft 3. Therefore, the second position 12 is located between the second side 212 and the locking plate 2332. The second baffle 232 rotates around the drive shaft 3 at the second position 12, and the wind shield 2322 in the second baffle 232 can block or unblock the second heat dissipation hole 2121 on the second side 212. Simultaneously, the limiting plate 2323 in the second baffle 232 can abut against the locking plate 2332, locking the position of the second baffle 232.

[0068] A drive shaft 3 is provided at a third position 13 on the substrate 1, which is a position away from the first side 211.

[0069] Since the locking plate 2332, connecting plate 2333, anti-vibration plate 2334, and abutment plate 2335 in the transmission baffle 233 all extend toward the first side 211, the transmission baffle 233 can rotate around the transmission shaft 3 at the third position 13, providing space for the transmission baffle 233 to rotate.

[0070] Please refer to the above. Figure 6 and Figure 7 , Figure 6 A schematic diagram of a drive shaft structure according to an embodiment of this application is shown. Figure 7A schematic diagram of a first torsion spring structure according to an embodiment of this application is shown.

[0071] In the embodiments of this application, such as Figure 6 and Figure 7 As shown, the transmission shaft 3 includes a shaft 33, a torsion spring boss 34, and a first torsion spring 31.

[0072] The function of shaft 33 is to connect two different components, allowing them to rotate relative to each other.

[0073] Specifically, the shaft 33 has a first end 331 and a second end 332 disposed opposite to each other, and the first end 331 is connected to the substrate 1. The outer surface of the first end 331 is provided with external threads, and at least a part of the structure of the first end 331 of the shaft 33 passes through the substrate 1 and is threadedly connected to a bushing or nut provided with internal threads to fix the shaft 33 on the substrate 1.

[0074] The function of the torsion spring boss 34 is to install the torsion spring. The torsion spring boss 34 is connected to the side near the first end 331, and the interior of the torsion spring boss 34 has a first torsion spring mounting hole 341 and a first torsion spring limiting groove 342 that are connected.

[0075] The function of the first torsion spring 31 is to achieve automatic rebound through torsional torque. Specifically, part of the structure of the first torsion spring 31 is arranged inside the first torsion spring mounting hole 341, and a first limiting spring 311 extends from one end of the first torsion spring 31, which is arranged inside the first torsion spring limiting groove 342.

[0076] In the existing technology, the opening and closing of the heat dissipation holes on the fan cover cannot be adaptively controlled, and it is necessary to use a motor to control the baffle to block or unblock the heat dissipation holes.

[0077] In the above embodiment, one end of the first torsion spring 31 is fixedly connected to the base plate 1 along with the torsion spring boss 34, and the other end is fixedly connected to the rotating component. When wind blows towards the rotating component, the wind force overcomes the torque of the first torsion spring 31, causing the rotating component to rotate relative to the base plate 1. The first torsion spring 31 bears a torsional load, and elastic deformation occurs inside the first torsion spring 31, converting the load into elastic potential energy. When the wind force decreases, it is insufficient to overcome the torque of the first torsion spring 31, and the elastic potential energy inside the first torsion spring 31 is released, driving the rotating component to rotate in the opposite direction. No additional sensors or motors are needed to control the rotating component.

[0078] It should be understood that the rotating component can be any of the first baffle 231, the second baffle 232, or the transmission baffle 233 in the embodiments of this application.

[0079] Please refer to the above. Figure 8 and Figure 9 , Figure 8 A schematic diagram of a first baffle structure according to an embodiment of this application is shown. Figure 9 A schematic diagram of a first mounting boss structure according to an embodiment of this application is shown.

[0080] In the embodiments of this application, such as Figure 8 As shown, first mounting bosses 2311 are symmetrically arranged on both sides of the first baffle 231. Specifically, two first mounting bosses 2311 are arranged on two end sides of the first baffle 231 along the extension direction of the shaft 33.

[0081] The two first mounting bosses 2311 have the same structure and configuration. For example... Figure 9 As shown, one of the first mounting bosses 2311 includes a first baffle mounting hole 23111, a second torsion spring mounting hole 23112, and a second torsion spring limiting groove 23113.

[0082] The first baffle mounting hole 23111 is fitted onto the outside of the first end 331 or the second end 332.

[0083] The second torsion spring mounting hole 23112 is connected to the first baffle mounting hole 23111 so that the first end 331 or the second end 332 of the shaft 33 can pass through.

[0084] The second torsion spring limiting groove 23113 is connected to the first torsion spring mounting hole 23112.

[0085] like Figure 7 As shown, another part of the structure of the first torsion spring 31 is disposed inside the second torsion spring mounting hole 23112 near the first end 331, and a second limiting spring 312 extends from the other end of the first torsion spring 31. The second limiting spring 312 is disposed inside the second torsion spring limiting groove 23113.

[0086] In the above embodiment, by setting a portion of the structure of the first torsion spring 31 inside the torsion spring boss 34 in the transmission shaft 3, and setting another portion of the structure of the first torsion spring 31 inside the first mounting boss 2311 on the first baffle 231, it is possible to achieve relative rotation between the first baffle 231 and the transmission shaft 3 when the force is applied; after the force is released, the first baffle 231 can rotate in the opposite direction.

[0087] Please refer to the above. Figure 4 and Figure 10 , Figure 4 A schematic diagram of the structure of a second baffle according to an embodiment of this application is shown. Figure 10 A schematic diagram of a second mounting boss structure according to an embodiment of this application is shown.

[0088] In the embodiments of this application, such as Figure 4As shown, second mounting bosses 2321 are symmetrically arranged on both sides of the second baffle 232. Specifically, the two second mounting bosses 2321 are located on two end sides of the second baffle 232 along the extension direction of the shaft 33. The two second mounting bosses 2321 have the same structure and configuration. Figure 10 As shown, the second mounting boss 2321 includes a second baffle mounting hole 23211, a third torsion spring mounting hole 23212, and a third torsion spring limiting groove 23213.

[0089] The second baffle mounting hole 23211 is fitted onto the outside of the first end 331 or the second end 332.

[0090] The third torsion spring mounting hole 23212 is connected to the second baffle mounting hole 23211 so that the first end 331 or the second end 332 of the shaft 33 can pass through.

[0091] The third torsion spring limiting groove 23213 is connected to the third torsion spring mounting hole 23212.

[0092] like Figure 7 As shown, another part of the structure of the first torsion spring 31 is disposed inside the third torsion spring mounting hole 23212 near the first end 331, and a second limiting spring 312 extends from the other end of the first torsion spring 31. The second limiting spring 312 is disposed inside the third torsion spring limiting groove 23213.

[0093] In the above embodiment, by setting a portion of the first torsion spring 31 inside the torsion spring boss 34 in the transmission shaft 3, and setting another portion of the first torsion spring 31 inside the second mounting boss 2321 on the second baffle 232, the second baffle 232 can rotate relative to the transmission shaft 3 when subjected to force; and can rotate in the opposite direction after the force on the second baffle 232 is released.

[0094] Please refer to the above. Figure 11 and Figure 12 , Figure 11 A schematic diagram of a transmission baffle structure according to an embodiment of this application is shown. Figure 12 A schematic diagram of a third mounting boss structure according to an embodiment of this application is shown.

[0095] In the embodiments of this application, such as Figure 11 As shown, symmetrical third mounting bosses 2331 are provided on both sides of the transmission baffle 233. Specifically, two third mounting bosses 2331 are provided on two end sides of the transmission baffle 233 along the extension direction of the shaft 33. The two third mounting bosses 2331 have the same structure and configuration. Figure 12 As shown, the third mounting boss 2331 includes a third baffle mounting hole 23311, a fourth torsion spring mounting hole 23312, and a fourth torsion spring limiting groove 23313.

[0096] The third baffle mounting hole 23311 is fitted onto the outside of the first end 331 or the second end 332.

[0097] The fourth torsion spring mounting hole 23312 is connected to the third baffle mounting hole 23311.

[0098] The fourth torsion spring limiting groove 23313 is connected to the fourth torsion spring mounting hole 23312.

[0099] like Figure 7 As shown, another part of the structure of the first torsion spring 31 is disposed inside the fourth torsion spring mounting hole 23312 near the first end 331, and a second limiting spring 312 extends from the other end of the first torsion spring 31. The second limiting spring 312 is disposed inside the fourth torsion spring limiting groove 23313.

[0100] In the above embodiment, by setting a portion of the first torsion spring 31 inside the torsion spring boss 34 in the transmission shaft 3, and setting another portion of the first torsion spring 31 inside the third mounting boss 2331 on the transmission baffle 233, the transmission baffle 233 can rotate relative to the transmission shaft 3 when subjected to force; and can rotate in the opposite direction after the transmission baffle 233 is released from force.

[0101] Please refer to the above. Figure 13 and Figure 14 , Figure 13 A schematic diagram of a second torsion spring structure according to an embodiment of this application is shown. Figure 14 A schematic diagram of a bushing structure according to an embodiment of this application is shown.

[0102] In the embodiments of this application, the second end 332 of the shaft 33 is provided with an internal thread. The first baffle mounting hole 23111, the second baffle mounting hole 23211, or the third baffle mounting hole 23311 is sleeved on the outside of the second end 332, and at least a portion of the structure of the second end 332 passes through the first baffle mounting hole 23111, the second baffle mounting hole 23211, or the third baffle mounting hole 23311.

[0103] The drive shaft 3 also includes a bushing 5 and a second torsion spring 35.

[0104] Among them, such as Figure 14 As shown, the bushing 5 includes a shaft through hole 51, a mounting hole 52, a fifth torsion spring mounting hole 53, and a fifth torsion spring limiting groove 54.

[0105] Specifically, the shaft through hole 51, the mounting hole 52, and the fifth torsion spring mounting hole 53 are interconnected, and the fifth torsion spring limiting groove 54 is connected to the fifth torsion spring mounting hole 53.

[0106] The screw is threaded into the internal thread of the second end 332 through the mounting hole 52.

[0107] The function of the second torsion spring 35 is to achieve automatic rebound through torsional torque. Specifically, as... Figure 13 As shown, part of the structure of the second torsion spring 35 is disposed inside the fifth torsion spring mounting hole 53, and a third limiting spring 351 extends from one end of the second torsion spring 35. The third limiting spring 351 is disposed inside the fifth torsion spring limiting groove 54.

[0108] A fourth limiting spring 352 extends from the other end of the second torsion spring 35 and is disposed inside the rotating component.

[0109] It should be understood that the rotating component can be any of the first baffle 231, the second baffle 232, or the transmission baffle 233 in the embodiments of this application.

[0110] In the embodiments of this application, such as Figure 1 As shown, the fan unit also includes a baffle protective cover 4. The function of the baffle protective cover 4 is to prevent foreign objects from entering the internal structure. The baffle protective cover 4 is connected to the fan cover 21.

[0111] Part of the structure of the baffle assembly 23 is located inside the baffle protective cover 4. Specifically, the first baffle 231, the transmission baffle 233, and the limiting plate 2323 of the second baffle 232 are located inside the baffle protective cover 4, while the wind shield 2322 of the second baffle 232 is located outside the baffle protective cover 4.

[0112] The baffle protective cover 4 is provided with a third heat dissipation hole 41 so that when the fan 22 is running, the hot airflow flows into the interior of the baffle protective cover 4 from the first heat dissipation hole 2111 on the first side 211 and is discharged through the third heat dissipation hole 41.

[0113] In the embodiments of this application, such as Figure 5 As shown, two ventilation holes 14 are provided on the substrate 1, and the two ventilation holes 14 are arranged in a one-to-one correspondence with the two fan covers 21.

[0114] With the first baffle 231 unblocking the first heat dissipation hole 2111 and the second baffle 232 unblocking the second heat dissipation hole 2121, the airflow enters the interior of the baffle protective cover 4 through the ventilation hole 14 and the inside of the fan cover 21, and flows out from the third heat dissipation hole 41.

[0115] In the embodiments of this application, such as Figure 15 As shown, when the fan 22 is not running, the first baffle 231 is attached to the first side 211 and blocks the first heat dissipation hole 2111. The second baffle 232 is attached to the second side 212 and blocks the second heat dissipation hole 2121. This prevents hot airflow and impurities from entering.

[0116] In the embodiments of this application, such as Figure 16 and Figure 17 As shown, when the fan 22 starts running, the first baffle 231 rotates away from the first side 211 and abuts against the abutment plate 2335. Subsequently, the first baffle 231 drives the transmission baffle 233 to rotate, so that the locking plate 2332 of the transmission baffle 233 abuts against the second baffle 232, so that the limiting plate 2323 of the second baffle 232 abuts against the area on the first side 211 away from the first heat dissipation hole 2111, thereby locking the position of the second baffle 232 by the locking plate 2332.

[0117] In the embodiments of this application, when the fan 22 is running stably, the second baffle 232 is perpendicular to the second side 212, and the second heat dissipation hole 2121 on the second side 212 is unobstructed, allowing the fan cover 21 to ventilate and dissipate heat normally. At this time, the second baffle 232 is not affected by the wind force. The second baffle 232 is subjected to the elastic force of the first torsion spring 31 and the second torsion spring 35 releasing their elastic potential energy. However, since the second baffle 232 is perpendicular to the locking plate 2332 of the transmission baffle 233, the force exerted by the second baffle 232 on the locking plate 2332 passes through the rotation center of the transmission baffle 233, thus not generating torque. The transmission baffle 233 does not rotate, achieving the unchanged locking state of the second baffle 232.

[0118] Furthermore, the first baffle 231 is nearly perpendicular to the first side surface 211, and the first heat dissipation hole 2111 of the first side surface 211 is unobstructed, allowing the fan shroud 21 to provide normal ventilation and heat dissipation. At this time, the first baffle 231 experiences minimal wind force. Under the influence of wind, the first baffle 231 applies a force perpendicular to the abutment plate 2335 of the transmission baffle 233. Since the force applied by the first baffle 231 to the abutment plate 2335 passes through the rotation center of the transmission baffle 233, no torque is generated, and the transmission baffle 233 does not rotate, thus achieving the function of limiting the movement of the first baffle 231.

[0119] In the embodiments of this application, when the airflow discharged from the fan cover 21 outside the operating fan 22 is relatively small, the first baffle 231 rotates towards the first side 211, and the first baffle 231 does not abut against the abutment plate 2335. Since the shape of the anti-vibration plate 2334 facing the first side 211 is the same as the rotation path of the end of the first baffle 231 facing the anti-vibration plate 2334, during the sliding connection between the first baffle 231 and the anti-vibration plate 2334, the anti-vibration plate 2334 contacts the end of the first baffle 231, and the first baffle 231 provides support for the anti-vibration plate 2334, so the transmission baffle 233 as a whole does not rotate. The locking state of the locking plate 2332 on the position of the second baffle 232 remains unchanged, and the second baffle 232 does not rotate.

[0120] In existing technology, when the wind force of the fan 22 decreases slightly, the baffle will rotate towards the side closer to the fan cover under the action of gravity or other forces; when the wind force of the fan 22 increases slightly, the baffle will rotate away from the fan cover under the action of the wind force. Therefore, when the wind force fluctuates within a certain range, the baffle will rotate continuously in opposite directions, leading to unstable heat dissipation of the equipment. Furthermore, the continuous rotation of the baffle in opposite directions can cause damage or even breakage of the baffle.

[0121] As the wind force continues to decrease, the first baffle 231 and the anti-shake plate 2334 change from a sliding connection to a disengaged state. Without the support of the first baffle 231, the transmission baffle 233 rotates towards the first side 211. The locking plate 2332 of the transmission baffle 233 releases its contact with the limiting plate 2323 of the second baffle 232, thus releasing the locking plate 2332 from locking the position of the second baffle 232. The second baffle 232 rotates towards the second side 212 until it blocks the second heat dissipation hole 2121 on the second side 212.

[0122] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dual-fan device, characterized in that, include: substrate; Two fan units, the two fan units having the same structure and configuration, one of the fan units including: A fan cover is disposed on the substrate, wherein a first heat dissipation hole is provided in a portion of a first side surface of the fan cover, and a second heat dissipation hole is provided in at least a portion of a second side surface. The fan is disposed inside the fan cover; baffle assembly, including: The first baffle is mounted on the substrate via a vertical transmission shaft and can rotate relative to the substrate to block or unblock the first heat dissipation hole. The second baffle is mounted on the substrate via the vertical transmission shaft and can rotate relative to the substrate to block or unblock the second heat dissipation hole. The transmission baffle is mounted on the base plate via the vertical transmission shaft and is capable of rotating relative to the base plate. When the first baffle rotates away from the first side and abuts against one end of the transmission baffle, the first baffle drives the transmission baffle to rotate, so that the other end of the transmission baffle abuts against the second baffle, thereby locking the position of the second baffle. When the first baffle rotates toward the first side and disengages from the transmission baffle, the transmission baffle releases its locking of the position of the second baffle.

2. The dual-fan device according to claim 1, characterized in that, The first heat dissipation hole is provided in the area of ​​the first side away from the second side; The second side has a second heat dissipation hole at least in the area near the connection position with the first side.

3. The dual-fan device according to claim 1, characterized in that, The transmission baffle includes: A locking plate is capable of abutting against the second baffle to abut a portion of the structure of the second baffle against the area on the first side away from the first heat dissipation hole; The connecting plate is connected at one end to the locking plate; A stabilizing plate is connected to the other end of the connecting plate, and the shape of the stabilizing plate facing the first side is the same as the rotation path of the first baffle. An abutment plate is connected to the end of the anti-shake plate away from the connecting plate and can abut against the first baffle. When the first baffle rotates away from the first side and comes into contact with the abutting plate, the first baffle drives the transmission baffle to rotate, causing the locking plate of the transmission baffle to come into contact with the second baffle to lock the position of the second baffle. When the first baffle rotates toward the first side and disengages from the transmission baffle, the locking plate of the transmission baffle releases its locking of the position of the second baffle.

4. The dual-fan device according to claim 3, characterized in that, The drive shaft is disposed at a first position on the substrate, wherein the first position is located on the same plane as the first side and away from the second side; The drive shaft is disposed at a second position on the substrate, the second position being located on the same plane as the second side and between the second side and the locking plate; The drive shaft is disposed at a third position on the substrate, the third position being a position away from the first side.

5. The dual-fan device according to claim 4, characterized in that, The drive shaft includes: A shaft has a first end and a second end disposed opposite to each other, the first end being connected to the substrate; A torsion spring boss is connected to the side near the first end, and the interior of the torsion spring boss is provided with a first torsion spring mounting hole and a first torsion spring limiting groove that are connected to each other. The first torsion spring has a partial structure disposed inside the first torsion spring mounting hole, and a first limiting spring extends from one end of the first torsion spring, which is disposed inside the first torsion spring limiting groove.

6. The dual-fan device according to claim 5, characterized in that, The first baffle is symmetrically provided with first mounting bosses on both sides. The two first mounting bosses have the same structure and configuration. The first mounting bosses include: The first baffle mounting hole is fitted onto the outside of the first end or the second end; The second torsion spring mounting hole is connected to the first baffle mounting hole; The second torsion spring limiting groove is connected to the first torsion spring mounting hole; In this configuration, another part of the structure of the first torsion spring is disposed inside the second torsion spring mounting hole near the first end, and a second limiting spring extends from the other end of the first torsion spring, which is disposed inside the second torsion spring limiting groove.

7. The dual-fan device according to claim 5, characterized in that, The second baffle is symmetrically provided with second mounting bosses on both sides. The two second mounting bosses have the same structure and configuration. The second mounting bosses include: The second baffle mounting hole is fitted onto the outside of the first end or the second end; The third torsion spring mounting hole is connected to the second baffle mounting hole; The third torsion spring limiting groove is connected to the third torsion spring mounting hole; The other part of the structure of the first torsion spring is disposed inside the third torsion spring mounting hole near the first end, and a second limiting spring extends from the other end of the first torsion spring, which is disposed inside the third torsion spring limiting groove.

8. The dual-fan device according to claim 5, characterized in that, The transmission baffle is symmetrically provided with third mounting bosses on both sides. The two third mounting bosses have the same structure and configuration. The third mounting bosses include: The third baffle mounting hole is fitted onto the outside of the first end or the second end; The fourth torsion spring mounting hole communicates with the third baffle mounting hole; The fourth torsion spring limiting groove is connected to the fourth torsion spring mounting hole; The other part of the structure of the first torsion spring is disposed inside the fourth torsion spring mounting hole near the first end, and a second limiting spring extends from the other end of the first torsion spring, which is disposed inside the fourth torsion spring limiting groove.

9. The dual-fan device according to any one of claims 1-8, characterized in that, The fan unit also includes a baffle protective cover, which is connected to the fan cover; A portion of the baffle assembly is disposed inside the baffle protective cover; The baffle protective cover is provided with a third heat dissipation hole.

10. The dual-fan device according to claim 9, characterized in that, The substrate has two ventilation holes, and the two ventilation holes are respectively provided with one-to-one correspondence with the two fan covers; When the first baffle is released from blocking the first heat dissipation hole and the second baffle is released from blocking the second heat dissipation hole, the airflow enters the interior of the baffle protective cover through the ventilation hole and flows out from the third heat dissipation hole.

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