Dustproof noise reduction driving device for cooling fan

Abstract

The invention discloses a dustproof noise reduction driving device for a cooling fan, and particularly relates to the field of air conditioning, the dustproof noise reduction driving device comprises a fan driving mechanism mounted in a box body, an air outlet seat is fixedly mounted at the air outlet end of the fan driving mechanism, a top plate is mounted at the top of the box body, and the air outlet seat is slidably arranged in the top plate; a mounting seat is mounted on the fan driving mechanism, a supporting seat is arranged below the mounting seat, the supporting seat is connected with the output end of the linear driver, a guide column is mounted between the mounting seat and the supporting seat, the periphery of the guide column is sleeved with a buffer spring, and the two ends of the buffer spring are fixed to the mounting seat and the supporting seat respectively; the input end of the damping mechanism is connected with the mounting base, and the output end of the damping mechanism is connected with the air outlet base. High-frequency whistling and turbulence noise caused by the fact that the air outlet and the top plate coincide and align are effectively prevented, and the noise reduction effect is guaranteed in the high-power mode of the fan driving mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and more specifically, to a dust-proof and noise-reducing drive device for a cooling fan. Background Art

[0002] A cooling fan is a device that reduces the temperature of an equipment or system by forcing air flow. In an air conditioning system, the cooling fan is a core part. The cooling fan mainly includes an air inlet and outlet mechanism and a drive mechanism. Taking a floor-standing air conditioner as an example, the cooling fan is installed inside the air conditioner cabinet.

[0003] In order to increase the dust-proof and noise-reducing functions, in the prior art, such as a dust-proof fresh air blower with a noise-reducing function disclosed in the publication number CN110925930B, when in normal use, the fan (cooling fan) drives the lifting cylinder to rise, so that the air outlet rises to the outside of the main body (air conditioner cabinet), enabling the air inside the main body to be discharged into the room through the air outlet, and enabling the fresh air blower to be used normally. At this time, under the buffering action of the spring and the installation component, the vibration generated during the operation of the fan is absorbed, reducing the probability of resonance of the fresh air blower and reducing the noise of the fresh air blower. After the fresh air blower is used up, the fan descends, and the top plate is pulled by the installation component and the lifting cylinder descends, so that the lifting cylinder is retracted into the main body. At the same time, the top of the main body is covered by the top plate, making the main body in a sealed state, reducing the probability of dust entering the main body and improving the dust-proof performance of the fresh air blower.

[0004] However, when the power of the fan increases to adjust the air, the vibration amplitude of the fan increases. Since the longer the length of the lifting cylinder, the more temperature loss of the discharged air, the length of the lifting cylinder should not be set too long. When the lifting cylinder descends to align the air outlet with the opening at the top of the main body, due to the increase in the power of the fan, the air outlet speed also increases, and the air outlet blows air currents to the upper and lower parts of the opening at the top of the main body. The presence of the cross plate (opening at the top of the main body) will guide part of the air current to deflect downward, generating a noise similar to whistling. A narrow channel (with a thickness less than the diameter of the air outlet) is formed between the cross plate and the lower edge of the air outlet, resulting in a significant increase in the local flow rate (similar to the Venturi effect). The flow rate at the narrow channel increases significantly, and the local pressure decreases (Bernoulli's principle) to form a high-speed area. A low-pressure vortex area is formed on the leeward side of the cross plate, causing a small amount of air current to flow back to form a backflow area. When the air current in the high-speed area passes through the narrow channel, a high-frequency whistling sound similar to whistling is generated. After the air current collides with the edge of the cross plate, random vortex shedding occurs, triggering a broadband "whooshing" turbulent noise, thus affecting the use effect. Summary of the Invention

[0005] A dust-proof and noise-reducing drive device for a cooling fan provided by the present invention aims to solve the problem that in the existing dust-proof and noise-reducing drive device for a cooling fan, when the power of the fan increases, high-frequency whistling sound and turbulent noise are generated between the air outlet and the front cross plate.

[0006] To achieve the above object, the present invention provides the following technical solution: a dust-proof and noise-reducing driving device for a cooling fan, which includes a fan driving mechanism installed inside a box body. An air outlet seat is fixedly installed at the air outlet end of the fan driving mechanism. A top plate is installed on the top of the box body. The air outlet seat is slidably arranged inside the top plate. An installation seat is installed on the fan driving mechanism. A support seat is arranged below the installation seat. The support seat is connected to the output end of a linear driver. A guiding column is installed between the installation seat and the support seat. A buffer spring is sleeved on the outer periphery of the guiding column, and both ends of the buffer spring are fixed to the installation seat and the support seat respectively. A damping mechanism is installed on the top plate. The input end of the damping mechanism is connected to the installation seat, and the output end of the damping mechanism is connected to the air outlet seat. The linear driver drives the air outlet seat to extend out above the top plate. When the fan driving mechanism drives the installation seat to move downward, the damping mechanism increases the resistance of the installation seat moving downward, so that the air outlet of the air outlet seat is located outside above the top plate.

[0007] In a preferred embodiment, a limiting mechanism is arranged between the installation seat and the support seat. The limiting mechanism includes a top block, and the top block is fixedly installed at the bottom of the installation seat. A bottom block is installed on the top of the support seat, and a buffer airbag is installed on the top of the bottom block. The top block, the bottom block and the buffer airbag are arranged vertically corresponding to each other.

[0008] In a preferred embodiment, the damping mechanism includes a transition box. A first damping sleeve is installed on the transition box. A piston is slidably arranged inside the first damping sleeve. A connecting member is detachably connected between the installation seat and the transition box. The connecting member includes a connecting soft belt, and the connecting soft belt passes through the inside of a hollow sleeve and the first damping sleeve. The connecting soft belt is fixedly connected to the piston.

[0009] In a preferred embodiment, a locking mechanism is installed on the installation seat. An iron sheet is fixedly arranged at one end of the connecting soft belt. The locking mechanism includes an electromagnetic lock. The output end of the electromagnetic lock is installed with a locking frame. The iron sheet passes through the inside of the locking frame. A locking magnetic block is arranged inside the locking frame, and the locking magnetic block is located on one side of the iron sheet.

[0010] In a preferred embodiment, a flipping seat is installed on one side inside the top plate, and the flipping seat is located on the side corresponding to the air outlet of the air outlet seat. One end of the flipping seat is rotatably connected with a transmission shaft. A connecting groove is opened at one end of the flipping seat. A fixed stop block is fixedly arranged on the inner wall of the connecting groove. An active stop block is fixedly arranged on the outer surface of the transmission shaft, and the fixed stop block and the active stop block are in active abutment with each other. The transmission shaft and the connecting soft belt are connected by a torsion spring. A wind guiding component is installed on one side of the flipping seat.

[0011] In a preferred embodiment, the wind guiding component includes a flipping plate. A top pressing component is slidably arranged inside one end of the flipping plate close to the air outlet seat. A top pressing spring is fixedly arranged between the top pressing component and the flipping plate.

[0012] In a preferred embodiment, a wind guide vane is provided between the turning plate and the pressing component. The wind guide vane includes a flexible sheet, a first flexible belt, and a second flexible belt. The first flexible belt and the second flexible belt are respectively fixed at both ends of the flexible sheet. Both ends of the first flexible belt are fixedly connected between the turning plate and the pressing component, and the second flexible belt is fixedly connected to the inner wall of the top plate. The flexible sheet is located above the turning plate.

[0013] In a preferred embodiment, a second damping sleeve is installed on the inner wall of the top plate. The end of the transmission shaft away from the turning seat is rotatably connected to the second damping sleeve. A blade is rotatably arranged inside the second damping sleeve, and the blade is fixedly connected to the transmission shaft.

[0014] In a preferred embodiment, a hollow sleeve is installed inside the transition box. The transition box is communicated with the first damping sleeve through a communication port, and a communication pipe is connected between the transition box and the second damping sleeve. The damping liquid inside the transition box is conveyed to the inside of the second damping sleeve through the communication pipe.

[0015] In a preferred embodiment, a dust-proof cover plate is rotatably connected to the top of the box body, and the dust-proof cover plate is rotatably connected to the air outlet seat.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention effectively prevents the air outlet from coinciding with the top plate to generate high-frequency whistling and turbulent noise, and ensures the noise reduction effect in the high-power mode of the fan driving mechanism.

[0018] The present invention increases the buffer stroke of the air outlet seat through the turning plate that tilts as the air outlet seat descends, not only avoiding the generation of whistling when the air outlet blows directly at the end of the turning plate, but also conforming to the use effect of cold air blowing upwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the box body of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the limiting mechanism of the present invention.

[0022] Figure 4 It is a schematic sectional view of the top plate of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the damping mechanism of the present invention.

[0024] Figure 6 It is a schematic top view of the structure of the locking mechanism of the present invention.

[0025] Figure 7Schematic side view of the locking mechanism structure of the present invention.

[0026] Figure 8 Schematic diagram of the end structure of the flipping seat of the present invention.

[0027] Figure 9 Schematic diagram of the air guiding vane structure of the present invention.

[0028] Figure 10 Schematic diagram of the pressing component structure of the present invention.

[0029] Figure 11 Schematic diagram of the inclination of the flipping plate of the present invention.

[0030] Figure 12 Schematic diagram of the dust-proof cover plate structure of the present invention.

[0031] Reference numerals are: 1, box body; 11, top plate; 12, fan drive mechanism; 13, mounting seat; 14, support seat; 15, linear driver; 16, guide post; 17, buffer spring; 2, air outlet seat; 21, air outlet; 3, dust-proof cover plate; 4, damping mechanism; 41, transition box; 411, hollow sleeve; 412, communication port; 42, damping sleeve one; 421, piston; 43, damping sleeve two; 431, blade; 432, communication pipe; 5, flipping seat; 51, transmission shaft; 52, connection groove; 53, fixed stop block; 54, movable stop block; 55, flipping plate; 56, pressing component; 57, pressing spring; 58, air guiding vane; 6, connecting piece; 61, connecting soft belt; 62, iron sheet; 7, locking mechanism; 71, electromagnetic lock; 72, locking frame; 73, locking magnetic block; 8, limiting mechanism; 81, top block; 82, bottom block; 83, buffer airbag. Detailed implementation manners

[0032] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0033] Refer to the attached drawings of the specification Figures 1 to 7, A dust-proof and noise-reducing driving device for a cooling fan, which includes a fan driving mechanism 12 installed inside a box body 1. An air outlet seat 2 is fixedly installed at the air outlet end of the fan driving mechanism 12. A top plate 11 is installed on the top of the box body 1. The air outlet seat 2 is slidably arranged inside the top plate 11. An installation seat 13 is installed on the fan driving mechanism 12. A support seat 14 is arranged below the installation seat 13. The support seat 14 is connected to the output end of a linear actuator 15. A guiding column 16 is installed between the installation seat 13 and the support seat 14. A buffer spring 17 is sleeved on the outer periphery of the guiding column 16, and both ends of the buffer spring 17 are fixed to the installation seat 13 and the support seat 14 respectively. A damping mechanism 4 is installed on the top plate 11. The input end of the damping mechanism 4 is connected to the installation seat 13, and the output end of the damping mechanism 4 is connected to the air outlet seat 2. The linear actuator 15 drives the air outlet seat 2 to extend out above the top plate 11 to the outside. When the fan driving mechanism 12 drives the installation seat 13 to move downward, the resistance of the installation seat 13 moving downward is increased through the damping mechanism 4, so that the air outlet 21 of the air outlet seat 2 is located above the top plate 11 to the outside.

[0034] It should be noted that an air inlet is provided at the lower part of the box body 1. The top plate 11 is hollow. The fan driving mechanism 12 is a prior art, which includes a housing, a motor, a fan blade and a control module. The fan driving mechanism 12 accelerates the air entering from the air inlet and discharges it through the air outlet 21 of the air outlet seat 2. When the fan driving mechanism 12 increases its power, its vibration amplitude increases.

[0035] Further, a limiting mechanism 8 is arranged between the installation seat 13 and the support seat 14. The limiting mechanism 8 includes a top block 81, and the top block 81 is fixedly installed at the bottom of the installation seat 13. A bottom block 82 is installed on the top of the support seat 14. A buffer airbag 83 is installed on the top of the bottom block 82. The top block 81, the bottom block 82 and the buffer airbag 83 are arranged vertically corresponding to each other.

[0036] It should be noted that the buffer airbag 83 plays a buffering role between the top block 81 and the bottom block 82 to avoid direct collision between the top block 81 and the bottom block 82 and cause wear.

[0037] Further, the damping mechanism 4 includes a transition box 41. A damping sleeve 42 is installed on the transition box 41. A piston 421 is slidably arranged inside the damping sleeve 42. A connecting member 6 is detachably connected between the installation seat 13 and the transition box 41. The connecting member 6 includes a connecting soft belt 61, and the connecting soft belt 61 passes through the inside of a hollow sleeve 411 and the damping sleeve 42. The connecting soft belt 61 is fixedly connected to the piston 421.

[0038] It should be noted that the inside of both the transition box 41 and the damping sleeve 42 is filled with damping liquid.

[0039] Further, a locking mechanism 7 is installed on the mounting base 13. One end of the connecting flexible belt 61 is fixedly provided with an iron sheet 62. The locking mechanism 7 includes an electromagnetic lock 71. The output end of the electromagnetic lock 71 is installed with a locking frame 72. The iron sheet 62 penetrates through the inside of the locking frame 72. A locking magnet 73 is arranged inside the locking frame 72, and the locking magnet 73 is located on one side of the iron sheet 62.

[0040] It should be noted that the electromagnetic lock 71 is a prior art. The electromagnetic lock 71 is activated to energize the locking magnet 73, so that the locking magnet 73 locks the iron sheet 62, thereby enabling the iron sheet 62 to be positioned and connected to the mounting base 13.

[0041] In this embodiment, the implementation scenario is specifically as follows: The support base 14 is pushed upward by the linear actuator 15, so that the mounting base 13 drives the fan driving mechanism 12 to move upward, and the air outlet 21 of the air outlet seat 2 is pushed out above the top plate 11 to the outside. When the fan driving mechanism 12 is in the high-power mode, the electromagnetic lock 71 is energized to lock the mounting base 13 with the connecting flexible belt 61 and the iron sheet 62. That is, when the fan driving mechanism 12 operates at high power and generates vibrations in the downward direction, the mounting base 13 drives the connecting flexible belt 61 to move downward synchronously. By squeezing the damping liquid inside the damping sleeve one 42 by the piston 421, the resistance to the downward movement of the connecting flexible belt 61 is increased, thereby increasing the resistance to the downward movement of the mounting base 13, slowing down the descending speed of the mounting base 13, and reducing the descending amplitude of the mounting base 13. By adjusting the distance between the top block 81 and the bottom block 82, the lower limit of the buffering of the buffer spring 17 is limited. Below the lowest buffering position of the mounting base 13, the lowest end of the air outlet 21 is flush with the top of the top plate 11. When the mounting base 13 descends to the lowest buffering position, the bottom block 82 limits the top block 81 to stop the mounting base 13 from descending. The buffer airbag 83 plays a buffering role between the top block 81 and the bottom block 82 to avoid direct collision between the top block 81 and the bottom block 82, which may cause wear and affect the limiting accuracy. Overall, it effectively prevents the air outlet 21 from overlapping and aligning with the top plate 11, generating high-frequency whistling and turbulent noise, and ensuring the noise reduction effect in the high-power mode of the fan driving mechanism 12.

[0042] By the above-mentioned methods of increasing resistance and forced limiting, the buffering stroke of the fan driving mechanism 12 is restricted, that is, there are requirements for the distance between the lowest end of the air outlet 21 and the upper surface of the top plate 11. Increasing the height of the air outlet seat 2 or reducing the height of the air outlet 21 will affect the air supply temperature or the air supply effect.

[0043] Refer to the attached drawings of the specification Figures 8 to 11, To solve this problem, the following technical solutions are also provided: A flipping seat 5 is installed on one side inside the top plate 11, and the flipping seat 5 is located on the side of the air outlet seat 2 corresponding to the air outlet 21. One end of the flipping seat 5 is rotatably connected to a transmission shaft 51. A connecting groove 52 is formed at one end of the flipping seat 5. A fixed stop block 53 is fixedly provided on the inner wall of the connecting groove 52. An active stop block 54 is fixedly provided on the outer surface of the transmission shaft 51, and the fixed stop block 53 and the active stop block 54 are in movable contact with each other. The transmission shaft 51 and the connecting flexible belt 61 are connected by a coil spring. A wind guiding component is installed on one side of the flipping seat 5.

[0044] It should be noted that one end of the fixed stop block 53 coincides with one end of the active stop block 54. When the transmission shaft 51 drives the active stop block 54 to rotate clockwise or counterclockwise, the active stop block 54 abuts against the fixed stop block 53, so that the transmission shaft 51 drives the flipping seat 5 to rotate through the fixed stop block 53 and the active stop block 54, making the wind guiding component tilt obliquely downward.

[0045] Furthermore, the wind guiding component includes a flipping plate 55. A pressing component 56 is slidably arranged inside one end of the flipping plate 55 close to the air outlet seat 2. A pressing spring 57 is fixedly arranged between the pressing component 56 and the flipping plate 55.

[0046] It should be noted that the pressing component 56 is a T-shaped block. The surface of one end of the pressing component 56 close to the air outlet seat 2 is an arc surface. The pressing component 56 slides closely on the surface of the air outlet seat 2. To reduce friction, a second solution can be adopted. The pressing component 56 includes a roller and a wheel frame. The wheel frame is connected to the pressing spring 57, and the wheel frame is slidably arranged inside one end of the flipping plate 55. The roller rolls closely on the surface of the air outlet seat 2. The second solution has a better effect but will increase the cost.

[0047] Still further, a wind guiding piece 58 is arranged between the flipping plate 55 and the pressing component 56. The wind guiding piece 58 includes a soft piece, a first flexible belt and a second flexible belt. The first flexible belt and the second flexible belt are respectively fixedly arranged at both ends of the soft piece. Both ends of the first flexible belt are fixedly connected between the flipping plate 55 and the pressing component 56 respectively. The second flexible belt is fixedly connected to the inner wall of the top plate 11. The soft piece is located above the flipping plate 55.

[0048] It should be noted that the wind guiding piece 58 is made of a soft dust-proof material, such as airtight plastic cloth.

[0049] In this embodiment, the implementation scenario is specifically as follows: Through the locking of the mounting base 13 and the iron sheet 62, when the mounting base 13 moves downward, a section of the connecting flexible belt 61 wound around the transmission shaft 51 is first released to provide buffering. This buffering stroke is the distance between the fixed stop 53 and the movable stop 54. Until the fixed stop 53 abuts against the movable stop 54, it enters the second stage. The transmission shaft 51 drives the flipping seat 5 to rotate through the fixed stop 53 and the movable stop 54, causing the flipping plate 55 to tilt obliquely downward. At this time, the distance between the air outlet 21 and the flipping plate 55 increases, thereby increasing the space for the air outlet 21 to descend without being blocked. The tightening assembly 56 presses against the surface of the air outlet seat 2 through the tightening spring 57 to play a dust-proof role. At this time, the air guiding piece 58 is tilted by the pulling of the flipping plate 55 and the tightening assembly 56. When the air outlet 21 corresponds to the air guiding piece 58, the air guiding piece 58 at this time serves as an air guiding channel, causing the air outlet 21 to blow air obliquely upward. Overall, through the flipping plate 55 that tilts as the air outlet seat 2 descends, the buffering stroke of the air outlet seat 2 is increased, which not only avoids the whistling sound generated by the direct blowing of the air outlet 21 on the end of the flipping plate 55 but also conforms to the use effect of cold air blowing upward.

[0050] When the flipping plate 55 pulls the air guiding piece 58 to tilt, due to the fast tilting speed of the air guiding piece 58, the air guiding piece 58 is instantaneously pulled, and the connection of the air guiding piece 58 is likely to become loose after a long time.

[0051] Refer to the attached Figures 5 to 11 To solve this problem, the following technical solution is also provided: A damping sleeve two 43 is installed on the inner wall of the top plate 11. One end of the transmission shaft 51 away from the flipping seat 5 is rotatably connected to the damping sleeve two 43. A blade 431 is rotatably arranged inside the damping sleeve two 43, and the blade 431 is fixedly connected to the transmission shaft 51.

[0052] It should be noted that the blade 431 uses a blade with a large width to increase the rotational resistance.

[0053] Furthermore, a hollow sleeve 411 is installed inside the transition box 41. The transition box 41 is communicated with the damping sleeve one 42 through a communication port 412. A communication pipe 432 is connected between the transition box 41 and the damping sleeve two 43. The damping liquid inside the transition box 41 is conveyed to the inside of the damping sleeve two 43 through the communication pipe 432.

[0054] It should be noted that the hollow sleeve 411 facilitates the separation and sealing of the transition box 41. The damping liquid inside the damping sleeve one 42 enters the inside of the transition box 41 through the communication port 412, so that the damping liquid inside the transition box 41 enters the inside of the damping sleeve two 43 through the communication pipe 432.

[0055] In this embodiment, the implementation scenario is specifically as follows: By connecting the blade 431 to the end of the transmission shaft 51 to increase the rotational resistance of the transmission shaft 51, and then connecting the transition box 41 through the connecting pipe 432. When the damping liquid inside the first damping sleeve 42 enters the inside of the transition box 41 through the communication port 412, the damping liquid inside the transition box 41 enters the second damping sleeve 43 through the connecting pipe 432, adding resistance to the rotation of the blade 431, thereby reducing the rotation speed of the flipping seat 5, slowing down the speed when the flipping plate 55 pulls the air guiding piece 58 to tilt, avoiding the instantaneous pulling of the air guiding piece 58, and ensuring the firm connection of the air guiding piece 58.

[0056] Refer to the attached Figure 12 The top of the box body 1 is rotatably connected with a dust-proof cover plate 3, and the dust-proof cover plate 3 is rotatably connected between the air outlet seat 2.

[0057] It should be noted that when the air outlet seat 2 is retracted into the box body 1, the dust-proof cover plate 3 plays a role in dust prevention.

[0058] Working principle:

[0059] The linear actuator 15 is used to push the support seat 14 upward, so that the mounting seat 13 drives the fan drive mechanism 12 to move upward, and the air outlet 21 of the air outlet seat 2 is pushed out above the top plate 11. When the fan drive mechanism 12 is in the high-power mode, power is supplied to the electromagnetic lock 71 to lock the mounting seat 13 with the connecting soft belt 61 and the iron sheet 62.

[0060] The mounting seat 13 drives the connecting soft belt 61 to move downward synchronously. By squeezing the damping liquid inside the first damping sleeve 42 through the piston 421, the resistance to the downward movement of the connecting soft belt 61 is increased, thereby increasing the resistance to the downward movement of the mounting seat 13, slowing down the descending speed of the mounting seat 13, and reducing the descending amplitude of the mounting seat 13.

[0061] By adjusting the distance between the top block 81 and the bottom block 82, the lower limit of the buffering of the buffer spring 17 is limited. When the mounting seat 13 descends to the lowest buffering position, the top block 81 is limited by the bottom block 82 to stop the mounting seat 13 from descending.

[0062] By locking the mounting seat 13 with the iron sheet 62, when the mounting seat 13 moves downward, a section of the connecting soft belt 61 wound around the transmission shaft 51 is first released to provide buffering until the fixed stop block 53 abuts against the movable stop block 54, entering the second stage. The transmission shaft 51 drives the flipping seat 5 to rotate through the fixed stop block 53 and the movable stop block 54, causing the flipping plate 55 to tilt obliquely downward. At this time, the distance between the air outlet 21 and the flipping plate 55 increases.

[0063] The pressing component 56 presses against the surface of the air outlet seat 2 through the pressing spring 57 to play a dust-proof role. At this time, the air deflector 58 is tilted by the pulling of the turning plate 55 and the pressing component 56. When the air outlet 21 corresponds to the air deflector 58, the air deflector 58 at this time serves as an air guiding channel, causing the air outlet 21 to blow obliquely upward.

[0064] By connecting the blade 431 to the end of the transmission shaft 51, the rotational resistance of the transmission shaft 51 is increased. Then, the transition box 41 is connected through the connecting pipe 432. When the damping liquid inside the damping sleeve one 42 enters the inside of the transition box 41 through the communication port 412, the damping liquid inside the transition box 41 enters the damping sleeve two 43 through the connecting pipe 432, increasing the resistance for the rotation of the blade 431, thereby reducing the rotation speed of the turning seat 5.

[0065] The buffering of the fan drive mechanism 12 is divided into the following stages:

[0066] The first stage: Referring to the prior art, initial buffering is carried out through the buffer spring 17, which is applicable to buffering and noise reduction during the operation of the small-power fan drive mechanism 12.

[0067] The second stage: By adding the damping sleeve one 42 and the connecting piece 6, the resistance for the air outlet seat 2 to descend driven by vibration during the operation of the high-power fan drive mechanism 12 is increased, slowing down the descending speed of the fan drive mechanism 12 and reducing the descending amplitude of the fan drive mechanism 12.

[0068] The third stage: The turning plate 55 is driven to rotate through the connecting piece 6, changing the flat horizontal plate into an inclined plate, thereby increasing the buffering stroke for the fan drive mechanism 12.

[0069] The fourth stage: The lowest buffering position of the fan drive mechanism 12 is limited by the limiting mechanism 8, forcing the air outlet 21 to be located above the air deflector 58. When in the fourth stage, the fan drive mechanism 12 should be overhauled.

[0070] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A dust-proof and noise-reducing drive device for a cooling fan, comprising a fan drive mechanism (12) installed inside a box body (1), an air outlet seat (2) is fixedly installed at the air outlet end of the fan drive mechanism (12), a top plate (11) is installed on the top of the box body (1), the air outlet seat (2) is slidably arranged inside the top plate (11), a mounting seat (13) is installed on the fan drive mechanism (12), a support seat (14) is arranged below the mounting seat (13), the support seat (14) is connected to the output end of a linear drive (15), a guide post (16) is installed between the mounting seat (13) and the support seat (14), a buffer spring (17) is sleeved on the outer periphery of the guide post (16), and both ends of the buffer spring (17) are fixed to the mounting seat (13) and the support seat (14) respectively, characterized in that: A damping mechanism (4) is installed on the top plate (11). The input end of the damping mechanism (4) is connected to the mounting seat (13), and the output end of the damping mechanism (4) is connected to the air outlet seat (2). The linear actuator (15) drives the air outlet seat (2) to extend out above the top plate (11). When the fan drive mechanism (12) drives the mounting seat (13) to move downward, the damping mechanism (4) increases the resistance of the mounting seat (13) moving downward, so that the air outlet (21) of the air outlet seat (2) is located outside above the top plate (11).

2. The dust-proof and noise-reducing driving device for a heat dissipation fan according to claim 1, wherein: The damping mechanism (4) includes a transition box (41). A first damping sleeve (42) is installed on the transition box (41). A piston (421) is slidably arranged inside the first damping sleeve (42). A connecting member (6) is detachably connected between the mounting seat (13) and the transition box (41). The connecting member (6) includes a connecting soft belt (61), and the connecting soft belt (61) passes through the inside of the hollow sleeve (411) and the first damping sleeve (42). The connecting soft belt (61) is fixedly connected to the piston (421).

3. The dust-proof and noise-reducing driving device for a cooling fan according to claim 2, characterized in that: A limiting mechanism (8) is arranged between the mounting seat (13) and the support seat (14). The limiting mechanism (8) includes a top block (81), and the top block (81) is fixedly installed at the bottom of the mounting seat (13). A bottom block (82) is installed at the top of the support seat (14). A buffer airbag (83) is installed on the top of the bottom block (82). The top block (81), the bottom block (82) and the buffer airbag (83) are arranged vertically corresponding to each other.

4. A dust-proof and noise-reducing driving device for a cooling fan according to claim 3, characterized in that: A locking mechanism (7) is installed on the mounting seat (13). An iron sheet (62) is fixedly arranged at one end of the connecting soft belt (61). The locking mechanism (7) includes an electromagnetic lock (71). A locking frame (72) is installed at the output end of the electromagnetic lock (71). The iron sheet (62) passes through the inside of the locking frame (72). A locking magnetic block (73) is arranged inside the locking frame (72), and the locking magnetic block (73) is located on one side of the iron sheet (62).

5. The dust-proof and noise-reducing driving device for a cooling fan according to claim 4, characterized in that: A turning seat (5) is installed on one side inside the top plate (11), and the turning seat (5) is located on one side corresponding to the air outlet (21) of the air outlet seat (2). One end of the turning seat (5) is rotatably connected to a transmission shaft (51). A connecting groove (52) is opened at one end of the turning seat (5). A fixed stop block (53) is fixedly arranged on the inner wall of the connecting groove (52). A movable stop block (54) is fixedly arranged on the outer surface of the transmission shaft (51), and the fixed stop block (53) and the movable stop block (54) are in movable abutment with each other. A coil spring is connected between the transmission shaft (51) and the connecting soft belt (61). A wind guiding component is installed on one side of the turning seat (5).

6. The dust-proof and noise-reducing driving device for a cooling fan according to claim 5, characterized in that: The wind guiding component includes a turning plate (55). A top pressing component (56) is slidably arranged inside one end of the turning plate (55) close to the air outlet seat (2). A top pressing spring (57) is fixedly arranged between the top pressing component (56) and the turning plate (55).

7. The dust-proof and noise-reducing driving device for a cooling fan according to claim 6, characterized in that: A wind guide vane (58) is provided between the flipping plate (55) and the pressing component (56). The wind guide vane (58) includes a flexible sheet, a first flexible belt and a second flexible belt. The first flexible belt and the second flexible belt are respectively fixed at both ends of the flexible sheet. Both ends of the first flexible belt are fixedly connected between the flipping plate (55) and the pressing component (56). The second flexible belt is fixedly connected to the inner wall of the top plate (11). The flexible sheet is located above the flipping plate (55).

8. A dust-proof and noise-reducing driving device for a cooling fan according to claim 7, characterized in that: A second damping sleeve (43) is installed on the inner wall of the top plate (11). The end of the transmission shaft (51) far from the flipping seat (5) is rotatably connected to the second damping sleeve (43). A blade (431) is rotatably arranged inside the second damping sleeve (43), and the blade (431) is fixedly connected to the transmission shaft (51).

9. A dust-proof and noise-reducing driving device for a cooling fan according to claim 8, characterized in that: A hollow sleeve (411) is installed inside the transition box (41). The transition box (41) is communicated with the first damping sleeve (42) through a communication port (412). A communication pipe (432) is communicated between the transition box (41) and the second damping sleeve (43). The damping liquid inside the transition box (41) is conveyed to the inside of the second damping sleeve (43) through the communication pipe (432).

10. A dust-proof and noise-reducing driving device for a cooling fan according to claim 9, characterized in that: A dust-proof cover plate (3) is rotatably connected to the top of the box body (1). The dust-proof cover plate (3) is rotatably connected to the air outlet seat (2).

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