Efficient cooling fan

Abstract

The invention relates to the technical field of fans, in particular to an efficient cooling fan. The problem that in the prior art, the inclination angle of blades of a cooling fan is difficult to adjust is solved, and the practicability of equipment is improved. The device structurally comprises a shell, a heat dissipation cavity is formed in the shell, a rotating shaft is rotationally connected into the heat dissipation cavity, a plurality of first blades are rotationally connected to the periphery of the rotating shaft, a first adjusting structure used for synchronously adjusting the inclination angle of each first blade is arranged on the rotating shaft, and a first control structure used for controlling the first adjusting structure is further arranged on the first adjusting structure; an air inlet pipe is arranged on the shell, and an air outlet pipe is arranged on the side wall of the shell. The design that blades are fixedly arranged in the prior art is replaced, the inclination angle of the first blade can be adjusted according to the actual work requirement, the phenomenon that the blades are damaged due to the fact that the loads of the blades are too high in the rotating process is avoided under the condition that the actual heat dissipation requirement is met, and high practicability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a high-efficiency heat dissipation fan. Background Art

[0002] A cooling fan is a device used to help electronic equipment or mechanical systems dissipate heat. It transfers heat from the inside of the device to the outside by controlling air flow, thereby preventing overheating and keeping the system running stably.

[0003] The existing heat dissipation fan works by sucking air from the center through the rotating shaft and pushing it along the outer edge of the rotating shaft to the fan outlet. The rotation of the rotating shaft generates centrifugal force, which accelerates the air flow and forms a high-pressure airflow, thereby effectively ventilating and dissipating heat.

[0004] Although this can achieve efficient heat dissipation, the following problems still exist: in actual working processes, different application scenarios have different requirements for the heat dissipation of the fan. For example, in scenarios where more heat is generated, the fan needs a higher speed to dissipate heat, and the inclination angle of the blades in the fan is fixed, which means that if the blade speed is increased, the blades will need to withstand greater pressure, which not only causes the fan to consume more energy under load, but also increases the noise generated by the blades. Summary of the invention

[0005] The present invention provides a high-efficiency heat dissipation fan, which solves the problem in the prior art that the inclination angle of the heat dissipation fan blades is difficult to adjust, thereby improving the practicability of the equipment.

[0006] The technical solution of the present invention is as follows: High efficiency heat dissipation fan, including housing, A heat dissipation cavity is provided in the shell, a rotating shaft is rotatably connected in the heat dissipation cavity, a plurality of first blades are rotatably connected to the outer circumference of the rotating shaft, a first adjustment structure for synchronously adjusting the inclination angles of the first blades is provided on the rotating shaft, and a first control structure for controlling the first adjustment structure is also provided on the first adjustment structure, an air inlet pipe is provided on the shell, an air outlet pipe is provided on the side wall of the shell, the air inlet pipe is provided with a second adjustment structure for adjusting the air intake volume, and the second adjustment structure is also provided with a second control structure for controlling the second adjustment structure.

[0007] Furthermore, the first adjustment structure includes a plurality of first rotating gears, each of the first rotating gears corresponds to the first blade one by one, the first rotating gear is fixedly connected to the first blade, an adjustment box is provided in the heat dissipation cavity, an adjustment cavity is provided in the adjustment box, the first rotating gear is rotatably connected to the adjustment cavity, a first driving motor is provided on the shell, an output shaft of the first driving motor is fixedly connected to the rotating shaft, a rotating sleeve is also rotatably connected to the rotating shaft, the rotating sleeve is sleeved on the rotating shaft, a rotating disk is rotatably connected in the adjusting cavity, the rotating disk is a disc-shaped structure, an adjusting gear ring is fixed on the outer circumference of the rotating disk, and each of the first rotating gears is meshed with the adjusting gear ring.

[0008] Furthermore, the first control structure includes a screw rod, and a control box is also provided on the rotating shaft. The outer surface of the control box is a cylindrical structure. A control cavity is provided in the control box. The inner wall of the control cavity is rotatably connected with a first sliding rod. The screw rod is rotatably connected to the control cavity. A second rotating gear is also fixed on the rotating sleeve. A first sliding rack is also provided in the control cavity. The first sliding rack is slidably connected to the first sliding rod, the first sliding rack is threadedly connected to the screw rod, and the first sliding rack is meshed with the second rotating gear.

[0009] Furthermore, a first limit plate and a second limit plate are fixed on both sides of the control cavity, both ends of the screw rod are rotatably connected to the first limit plate and the second limit plate respectively, and the first sliding rod is rotatably connected to the first limit plate and the second limit plate at the same time. A second drive motor is also fixed in the control cavity, and the output shaft of the second drive motor is fixedly connected to the screw rod.

[0010] Furthermore, the thickness of the first blade close to the rotating shaft end is greater than the thickness of the first blade far from the rotating shaft end.

[0011] Furthermore, the second adjustment structure includes a plurality of second blades, a fixed shaft is fixed on the shell, one end of each of the second blades is rotatably connected to the fixed shaft, the other end of each of the second blades is rotatably connected to the inner wall of the air inlet pipe, a third rotating gear is fixed to the other end of each of the second blades, a sliding ring is slidably connected to the outer wall of the air inlet pipe, a plurality of second sliding racks are also fixed on the sliding ring, each of the second sliding racks corresponds to the third rotating gear one by one, and each of the second sliding racks is meshed with each third rotating gear.

[0012] Furthermore, the second control structure includes a plurality of telescopic parts, a fixed end of each telescopic part is fixedly connected to the shell, a telescopic end of each telescopic part is fixedly connected to a sliding ring, a plurality of sliding grooves are provided on the outer wall of the air inlet duct, a plurality of sliding blocks are fixed to the inner wall of the sliding ring, each sliding block corresponds to the sliding groove one by one, and each sliding block is slidingly connected to the sliding groove.

[0013] Furthermore, an installation box is provided at the bottom of the shell, a vacuum chamber is provided in the installation box, an air outlet pipe is connected to the vacuum chamber and the shell, a plurality of supporting members are provided at the bottom of the installation box, a connecting pipe is connected between each vacuum chamber and the shell, a vent is provided at the bottom of each vacuum chamber, a suction cup is connected to the vent, and a one-way member for controlling the airflow from the suction cup side to the vacuum chamber is provided in the vacuum chamber.

[0014] Furthermore, the one-way member is a spherical structure, the one-way member abuts against the vent, a second sliding rod is fixed on the top of the one-way member, the second sliding rod is slidably connected to the support member, a limiting spring is also sleeved on the second sliding rod, and both ends of the limiting spring are respectively fixedly connected to the one-way member and the inner wall of the vacuum chamber.

[0015] Furthermore, the support member includes a connecting portion and an abutting portion, the connecting portion is a cylindrical structure, the abutting portion is a truncated cone structure, the connecting pipe is connected to the side wall of the connecting portion, and a control bolt is also fixed to the end of the sliding rod.

[0016] The working principle and beneficial effects of the present invention are: The working process of this embodiment is as follows: first, the shell is placed at the position where heat dissipation is required, and the air inlet pipe and the air outlet pipe are connected to the equipment to be cooled. Then, the second blade is rotated by contracting the telescopic part, so that the air inlet pipe is in a closed state. At this time, the second driving motor is started, and the rotation of the screw rod drives the sliding rack to move, so that the second rotating gear rotates and drives the adjusting gear ring to rotate. After the first blade is rotated to a suitable angle through the first rotating gear, the telescopic part is extended to rotate the second blade to open the air inlet pipe, and then the first driving motor is started to rotate the first blade to complete the heat dissipation of the equipment. During the heat dissipation process, the air pressure in the air outlet pipe drops due to the flow of air, and the air on the suction cup flows toward the air outlet, pushing the one-way part to open the vent. The air pressure on the suction cup drops, and the suction cup can be more firmly fixed to the position where heat dissipation is required.

[0017] The present invention sets a heat dissipation cavity in a shell, sets a rotating shaft in the heat dissipation cavity, and sets a plurality of first blades rotatably on the outer periphery of the rotating shaft. The first control structure controls the first adjustment structure to adjust the inclination angle of the first blades, and the second control structure controls the second adjustment structure to control the air intake volume of the air intake pipe. The present invention replaces the design of fixedly setting blades in the prior art. The present invention can adjust the inclination angle of the first blade according to actual working needs. Under the condition of meeting the actual heat dissipation needs, the present invention avoids the phenomenon that the blades are damaged due to excessive load during rotation, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a structural schematic diagram of the prior art; Figure 2 The overall structure of this embodiment is shown in FIG. Figure 1 ; Figure 3 The overall structure of this embodiment is shown in FIG. Figure 2 ; Figure 4 Schematic diagram of the structure inside the shell in this embodiment; Figure 5 Schematic diagram of the internal structure of the regulating box in this embodiment; Figure 6 Schematic diagram of the internal structure of the control box in this embodiment; Figure 7 Schematic diagram of the connection structure of the air inlet pipe in this embodiment; Figure 8 Schematic diagram of the internal structure of the support member in this embodiment.

[0020] In the figure: 1. Shell; 11. Air inlet pipe; 111. Sliding groove; 12. Air outlet pipe; 13. Control box; 131. Control chamber; 1311. First limit plate; 1312. Second limit plate; 1313. Second drive motor; 1314. Screw rod; 1315. First sliding rod; 1316. First sliding rack; 1317. Rotating sleeve; 1318. Second rotating gear; 14. Heat dissipation chamber; 15. Third rotating gear; 2. First drive motor; 21. Rotating shaft; 3. Mounting box; 31 , connecting tube; 32, vacuum chamber; 4, supporting member; 41, suction cup; 411, vent; 42, connecting portion; 43, abutting portion; 44, one-way member; 45, second sliding rod; 451, limit spring; 452, control bolt; 5, second blade; 51, fixed shaft; 6, sliding ring; 61, telescopic member; 62, second sliding rack; 63, sliding block; 7, adjusting box; 71, first blade; 72, adjusting chamber; 711, first rotating gear; 8, rotating disk; 81, adjusting gear ring. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 2~Figure 8As shown, this embodiment proposes a high-efficiency heat dissipation fan, whose structure includes a shell 1. The heat dissipation chamber 14 in this embodiment is arranged in the shell 1, the rotating shaft 21 is rotatably arranged in the heat dissipation chamber 14, and a plurality of first blades 71 are rotatably arranged on the outer periphery of the rotating shaft 21. The first adjustment structure is arranged on the rotating shaft 21, and is used to synchronously adjust the inclination angle of each first blade 71. The first control structure is arranged on the first adjustment structure, and is used to control the first adjustment structure. The air inlet pipe 11 is arranged on the shell 1, and the air outlet pipe 12 is arranged on the side wall of the shell 1. The second adjustment structure is arranged on the air inlet pipe 11, and is used to adjust the air intake volume. The second control structure is arranged on the second adjustment structure, and is used to control the second adjustment structure.

[0023] The first adjustment structure in this embodiment includes a plurality of first rotating gears 711, each of which corresponds to the first blade 71 one by one, and the first rotating gear 711 is fixedly connected to the first blade 71. The adjustment box 7 is arranged in the heat dissipation cavity 14, so as to reduce the influence of the hot air flow on the internal parts of the adjustment box 7, and prevent the first rotating gear 711 and the adjusting gear ring 81 from being dusted and affecting its mechanical transmission. The adjustment cavity 72 is arranged in the adjustment box 7, and the first rotating gear 711 is rotatably connected to the adjustment cavity 72, and is on the housing 1 of the first drive motor 2, so as to adjust the first rotating gear 711 by driving the first drive motor 2, without manual adjustment, so that the adjustment angle is more convenient. The output shaft of the first drive motor 2 is fixedly connected to the rotating shaft 21, the rotating sleeve 1317 is rotatably arranged on the rotating shaft 21, the rotating sleeve 1317 is sleeved on the rotating shaft 21, the rotating disk 8 is rotatably arranged in the adjustment cavity 72, the rotating disk 8 is a disc-shaped structure, the adjusting gear ring 81 is fixedly arranged on the outer periphery of the rotating disk 8, and each first rotating gear 711 is meshed with the adjusting gear ring 81. This design ensures that when the rotating disk 8 rotates, it will drive the first rotating gears 711 to rotate synchronously, thereby achieving synchronous rotation and tilting of several first blades 71. Each first blade 71 does not need to be adjusted one by one, and the inclination angle of the first blade 71 has a high adjustment efficiency.

[0024] The first control structure in this embodiment includes a screw rod 1314, the control box 13 is arranged on the rotating shaft 21, the outer surface of the control box 13 is a cylindrical structure, the control chamber 131 is arranged in the control box 13, the first sliding rod 1315 is rotatably arranged on the inner wall of the control chamber 131, the screw rod 1314 is rotatably connected to the control chamber 131, the second rotating gear 1318 is fixedly arranged on the rotating sleeve 1317, the first sliding rack 1316 is arranged in the control chamber 131, the first sliding rack 1316 is slidably connected to the first sliding rod 1315, the first sliding rack 1316 is threadedly connected to the screw rod 1314, and the first sliding rack 1316 is meshed with the second rotating gear 1318. In this embodiment, the first sliding rack 1316 is controlled to slide by the screw rod 1314. Since the rotation stroke of the screw rod 1314 is much greater than the movement stroke of the first sliding rack 1316, the first sliding rack 1316 is more accurately stopped when sliding, thereby achieving more accurate adjustment of the tilt angle of the first blade 71. In this embodiment, the first sliding rack 1316 is controlled by the screw rod 1314 to rotate the second rotating gear 1318, so that even when the driving motor is turned off, the sliding rack will be self-locked on the screw rod 1314 under the action of the screw rod 1314, thereby reducing the self-rotation deviation phenomenon of the first blade 71 during operation.

[0025] In this embodiment, the first limit plate 1311 and the second limit plate 1312 are fixedly arranged on both sides of the control chamber 131, and are used to install the screw rod 1314 and the first sliding rod 1315. The two ends of the screw rod 1314 are rotatably connected to the first limit plate 1311 and the second limit plate 1312 respectively, and the first sliding rod 1315 is rotatably connected to the first limit plate 1311 and the second limit plate 1312 at the same time. The second drive motor 1313 is fixedly arranged in the control chamber 131, and the output shaft of the second drive motor 1313 is fixedly connected to the screw rod 1314. In this embodiment, the first limit plate 1311 and the second limit plate 1312 are used to divide the control chamber 131 into three parts, and the second drive motor 1313 can be placed in one of the parts to reduce the influence of hot air on the second drive motor 1313 during operation. The second drive motor 1313 used in this embodiment is a two-phase motor. The second drive motor 1313 controls the rotation of the screw rod 1314 to achieve automatic control of the rotation of the screw rod 1314, reducing manual intervention, and the use of this embodiment is more convenient.

[0026] In this embodiment, the thickness of the first blade 71 near the rotating shaft 21 is greater than the thickness of the first blade 71 away from the rotating shaft 21. The design of the first blade 71 in this embodiment has the following beneficial effects: 1. Improving airflow efficiency: The thickness change can not only optimize the flow of airflow, reduce eddy currents and airflow losses, thereby improving the efficiency of the fan, but also reduce the instability of airflow and reduce noise; 2. Improving the distribution of airflow, making the air flow more evenly to the fan outlet, and enhancing the overall performance of the fan; 3. Anti-vibration ability: The thickened design improves the anti-vibration ability of the blade and increases the stability of the fan during operation.

[0027] The installation box 3 in this embodiment is arranged at the bottom of the shell 1, and the vacuum chamber 32 is arranged in the installation box 3, which is used to connect the support member 4 and the installation box 3. The air outlet pipe 12 connects the vacuum chamber 32 and the shell 1, and a number of support members 4 are arranged at the bottom of the installation box 3. The connecting pipe 31 is connected and arranged between each vacuum chamber 32 and the shell 1. The vent 411 is arranged at the bottom of each vacuum chamber 32, and the suction cup 41 is connected to the vent 411. The one-way member 44 is arranged in the vacuum chamber 32 to control the airflow from the suction cup 41 side to the vacuum chamber 32. The suction cup 41 used in this embodiment is preferably made of rubber material. The soft rubber can fit more closely on the ground, helping the suction cup 41 to be fixed more firmly to the ground. In this embodiment, the atmospheric pressure in the suction cup 41 is made less than the atmospheric pressure outside by controlling the sealing of the vent 411 by the one-way member 44, so as to ensure that the suction cup 41 fits more firmly with the ground and prevents it from being separated from the ground, causing the heat dissipation fan to be offset.

[0028] The one-way member 44 in this embodiment is a spherical structure, which is used to ensure that even if the vent 411 is worn during use, the one-way member 44 can still be used to abut against the vent 411 to ensure the sealing effect of the vent 411. The one-way member 44 abuts against the vent 411, and a second sliding rod 45 is fixed on the top of the one-way member 44. The second sliding rod 45 is slidably connected with the support member 4 to ensure the stable sliding of the one-way member 44, so that the one-way member 44 can more accurately seal the vent 411. The limit spring 451 is sleeved on the second sliding rod 45, and the two ends of the limit spring 451 are fixedly connected to the one-way member 44 and the inner wall of the vacuum chamber 32 respectively. Such a design ensures that the one-way member 44 will always abut against the vent 411 without the action of external force, ensuring that the suction cup 41 is in a vacuum state and strengthening the fixing effect of the suction cup 41.

[0029] The support member 4 in this embodiment includes a connecting portion 42 and an abutting portion 43. The connecting portion 42 is a cylindrical structure, which is used to provide a larger installation space and facilitate the installation of the second sliding rod 45 and the limit spring 451. The abutting portion 43 is a truncated cone structure, which is used to facilitate the folding of the vent 411 and the sealing effect of the one-way member 44 on the vent 411. The connecting pipe 31 is connected to the side wall of the connecting portion 42, and the control bolt 452 is fixedly set at the end of the sliding rod. This embodiment adopts the control bolt 452, so that the user can pull the control bolt 452 to make the one-way member 44 detach from the vent 411, and the airflow can re-enter the suction cup 41, which is convenient for the disassembly and movement of the heat dissipation fan.

[0030] The second adjustment structure in this embodiment includes a plurality of second blades 5, and a fixed shaft 51 is fixedly arranged on the housing 1 for mounting the second blades 5, so that the second blades 5 can be rotatably connected relative to the housing 1, ensuring that the second blades 5 are more firmly and reliably installed. One end of each second blade 5 is rotatably connected to the fixed shaft 51, and the other end of each second blade 5 is rotatably connected to the inner wall of the air inlet pipe 11, and the third rotating gear 15 is fixedly arranged on the other end of each second blade 5, and the sliding ring 6 is slidably arranged on the outer wall of the air inlet pipe 11, and a plurality of second sliding racks 62 are fixedly arranged on the sliding ring 6, and each second sliding rack 62 corresponds to the third rotating gear 15 one by one, and each second sliding rack 62 is meshed with each third rotating gear 15. Such a design enables the sliding ring 6 to drive the second sliding rack 62 to move when sliding on the air inlet pipe 11, thereby realizing the control of the third rotating gear 15 to rotate, so that the second blade 5 can be controlled to rotate to control the opening degree of the air inlet pipe 11, so as to achieve the purpose of controlling the air intake of the air inlet pipe 11.

[0031] The second control structure in this embodiment includes a plurality of telescopic parts 61, the fixed end of each telescopic part 61 is fixedly connected to the housing 1, the telescopic end of each telescopic part 61 is fixedly connected to the sliding ring 6, a plurality of sliding grooves 111 are arranged on the outer wall of the air inlet pipe 11, a plurality of sliding blocks 63 are fixedly arranged on the inner wall of the sliding ring 6, each sliding block 63 corresponds to the sliding groove 111 one by one, and each sliding block 63 is slidingly connected to the sliding groove 111, so as to prevent the sliding ring 6 from rotating during the sliding process and affecting the meshing between the second rack and the third rotating gear 15. The telescopic part 61 used in this embodiment is preferably a hydraulic cylinder or a pneumatic cylinder. Among them, the hydraulic cylinder or the cylinder is the prior art, and will not be described in detail in this embodiment.

[0032] The working process of this embodiment is as follows: first, the shell 1 is placed at a position where heat dissipation is required, and the air inlet pipe 11 and the air outlet pipe 12 are connected to the equipment to be cooled. Then, the second blade 5 is rotated by contracting the telescopic member 61, so that the air inlet pipe 11 is in a closed state. At this time, the second driving motor 1313 is started, and the screw rod 1314 rotates to drive the sliding rack to move, so that the second rotating gear 1318 rotates to drive the adjusting gear ring 81 to rotate, and the first rotating gear 711 is synchronously driven to rotate the first blade 71 to a suitable angle, and then the telescopic member 61 is extended to rotate the second blade 5 to open the air inlet pipe 11, and then the first driving motor 2 is started to rotate the first blade 71 to complete the heat dissipation of the equipment. During the heat dissipation process, due to the flow of air at the air outlet, the air pressure of the air outlet pipe 12 decreases, and the air on the suction cup 41 flows toward the air outlet pipe 12, pushing the one-way member 44 to open the vent 411, and the air pressure on the suction cup 41 decreases, so that the suction cup 41 can be more firmly fixed at the position where heat dissipation is required.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency heat dissipation fan, comprising a housing (1), characterized in that: The shell (1) is provided with a heat dissipation cavity (14), a rotating shaft (21) is rotatably connected to the heat dissipation cavity (14), a plurality of first blades (71) are rotatably connected to the outer circumference of the rotating shaft (21), a first adjustment structure for synchronously adjusting the inclination angles of the first blades (71) is provided on the rotating shaft (21), and a first control structure for controlling the first adjustment structure is also provided on the first adjustment structure; an air inlet pipe (11) is provided on the shell (1), an air outlet pipe (12) is provided on the side wall of the shell (1), the air inlet pipe (11) is provided with a second adjustment structure for adjusting the air intake volume, and the second adjustment structure is also provided with a second control structure for controlling the second adjustment structure.

2. The high-efficiency heat dissipation fan according to claim 1, characterized in that: The first adjustment structure comprises a plurality of first rotating gears (711), each of the first rotating gears (711) corresponding to a first blade (71) in a one-to-one manner, the first rotating gears (711) being fixedly connected to the first blade (71), an adjustment box (7) being provided in the heat dissipation cavity (14), an adjustment cavity (72) being provided in the adjustment box (7), the first rotating gears (711) being rotationally connected to the adjustment cavity (72), a first driving motor (2) being provided on the housing (1), an output shaft of the first driving motor (2) being fixedly connected to a rotating shaft (21), a rotating sleeve (1317) being rotationally connected to the rotating shaft (21), the rotating sleeve (1317) being sleeved on the rotating shaft (21), a rotating disk (8) being rotationally connected in the adjustment cavity (72), the rotating disk (8) being a disc-shaped structure, an adjusting toothed ring (81) being fixedly provided on the outer circumference of the rotating disk (8), and each of the first rotating gears (711) being meshed with the adjusting toothed ring (81).

3. The high-efficiency heat dissipation fan according to claim 2, characterized in that: The first control structure comprises a screw rod (1314); a control box (13) is also provided on the rotating shaft (21); the outer surface of the control box (13) is a cylindrical structure; a control chamber (131) is provided in the control box (13); a first sliding rod (1315) is rotatably connected to the inner wall of the control chamber (131); the screw rod (1314) is rotatably connected to the control chamber (131); a second rotating gear (1318) is also fixed on the rotating sleeve (1317); a first sliding rack (1316) is also provided in the control chamber (131); the first sliding rack (1316) is slidably connected to the first sliding rod (1315); the first sliding rack (1316) is threadedly connected to the screw rod (1314); and the first sliding rack (1316) is meshed with the second rotating gear (1318).

4. The high-efficiency heat dissipation fan according to claim 3, characterized in that: A first limit plate (1311) and a second limit plate (1312) are fixed on both sides of the control chamber (131); two ends of the screw rod (1314) are rotatably connected to the first limit plate (1311) and the second limit plate (1312), respectively; the first sliding rod (1315) is rotatably connected to the first limit plate (1311) and the second limit plate (1312) at the same time; a second drive motor (1313) is also fixed in the control chamber (131); an output shaft of the second drive motor (1313) is fixedly connected to the screw rod (1314).

5. The high-efficiency heat dissipation fan according to claim 4, characterized in that: The thickness of the first blade (71) at the end close to the rotating shaft (21) is greater than the thickness of the first blade (71) at the end far from the rotating shaft (21).

6. The high-efficiency heat dissipation fan according to claim 1, characterized in that: The second adjustment structure comprises a plurality of second blades (5); a fixed shaft (51) is fixed on the shell (1); one end of each second blade (5) is rotatably connected to the fixed shaft (51); the other end of each second blade (5) is rotatably connected to the inner wall of the air inlet pipe (11); a third rotating gear (15) is fixed to the other end of each second blade (5); a sliding ring (6) is slidably connected to the outer wall of the air inlet pipe (11); a plurality of second sliding racks (62) are also fixed on the sliding ring (6); each second sliding rack (62) corresponds to the third rotating gear (15) one by one, and each second sliding rack (62) is meshed with each third rotating gear (15).

7. The high-efficiency heat dissipation fan according to claim 6, characterized in that: The second control structure comprises a plurality of telescopic parts (61), the fixed end of each telescopic part (61) being fixedly connected to the housing (1), the telescopic end of each telescopic part (61) being fixedly connected to the sliding ring (6), a plurality of sliding grooves (111) being provided on the outer wall of the air inlet pipe (11), a plurality of sliding blocks (63) being fixed on the inner wall of the sliding ring (6), each sliding block (63) corresponding to the sliding groove (111) one by one, and each sliding block (63) being slidingly connected to the sliding groove (111).

8. The high-efficiency heat dissipation fan according to claim 1, characterized in that: A mounting box (3) is provided at the bottom of the shell (1), a vacuum chamber (32) is provided in the mounting box (3), an air outlet pipe (12) is connected between the vacuum chamber (32) and the shell (1), a plurality of supporting members (4) are provided at the bottom of the mounting box (3), a connecting pipe (31) is connected between each vacuum chamber (32) and the shell (1), a vent (411) is provided at the bottom of each vacuum chamber (32), a suction cup (41) is connected to the vent (411), and a one-way member (44) for controlling airflow from the suction cup (41) side to the vacuum chamber (32) is provided in the vacuum chamber (32).

9. The high-efficiency heat dissipation fan according to claim 8, characterized in that: The one-way member (44) is a spherical structure. The one-way member (44) is in contact with the vent (411). A second sliding rod (45) is fixed to the top of the one-way member (44). The second sliding rod (45) is slidably connected to the support member (4). A limit spring (451) is also sleeved on the second sliding rod (45). The two ends of the limit spring (451) are respectively fixedly connected to the one-way member (44) and the inner wall of the vacuum chamber (32).

10. The high-efficiency heat dissipation fan according to claim 9, characterized in that: The support member (4) comprises a connecting portion (42) and an abutting portion (43); the connecting portion (42) is a cylindrical structure, the abutting portion (43) is a truncated cone structure, the connecting pipe (31) is connected to a side wall of the connecting portion (42), and a control bolt (452) is also fixed to the end of the sliding rod.

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