Fan module and computer

Abstract

The utility model relates to the technical field of heat dissipation devices, and discloses a fan module and a computer. The fan is arranged on the mounting frame; the dustproof net is arranged on the mounting frame and located on the air inlet side of the fan, the dustproof net is obliquely arranged, the distance between the top edge of the dustproof net and the fan is larger than the distance between the bottom edge of the dustproof net and the fan, and the dustproof net is used for filtering air sucked by the fan; and at least part of particulate matters in the air are blocked and fall off. In this way, the deposition rate of dust on the dustproof net can be reduced, and the heat dissipation performance of equipment after long-time use is guaranteed.

Description

Technical Field

[0001] This application relates to the field of heat dissipation device technology, specifically to a fan module and a computer. Background Technology

[0002] For some electronic devices such as computers, air cooling with cooling fans is often chosen to ensure the performance and lifespan of internal electrical components. Air cooling brings dust and other particulate matter from the environment into the device. To slow down dust accumulation, dust filters are usually installed at the vents. However, when too many dust particles accumulate on the filters, it can clog the airflow, increasing fan resistance, reducing airflow, and ultimately affecting the device's heat dissipation performance. Utility Model Content

[0003] In view of the above problems, this application provides a fan module and a computer that can slow down the dust deposition rate on the dust filter and ensure the heat dissipation performance of the device after long-term use.

[0004] According to one aspect of the embodiments of this application, a fan module is provided, including: a mounting bracket; a fan disposed on the mounting bracket; and a dust filter disposed on the mounting bracket and located on the air intake side of the fan. The dust filter is inclined, and the distance between the top edge of the dust filter and the fan is greater than the distance between the bottom edge of the dust filter and the fan. The dust filter is used to filter the air drawn in by the fan to block at least some of the particulate matter in the air and cause it to fall off.

[0005] In one alternative embodiment, the edge of the mounting bracket extends toward the dustproof net to form a connecting plate, and the dustproof net is detachably embedded in the connecting plate.

[0006] In one alternative embodiment, the fan module further includes a mounting cover with a dust filter embedded in the inner circumference of the mounting cover, and the mounting cover is embedded and fixed in the connecting plate body; the bottom of the mounting cover has an opening for falling particles to pass through.

[0007] In one alternative embodiment, the fan module also includes a dust storage box located at the bottom of the dust filter. The top of the dust storage box has a dust collection port located on the bottom edge of the dust filter away from the fan. The dust collection port is used to allow falling particles to enter the dust storage box.

[0008] In one alternative approach, a dust discharge hole is provided at the bottom of the dust storage box for discharging at least a portion of the particles inside the dust storage box.

[0009] In one alternative approach, the fan is configured to create a reverse airflow to blow off at least some of the particles adsorbed on the dust filter by blowing air onto it.

[0010] In one alternative embodiment, the fan includes a drive component and a working component; the drive component has an output shaft; the working component includes: a hub, blades, a connecting disc, a bushing, a bearing, and a connecting column; the hub is fixedly connected to the output shaft, and the hub has a mounting hole along its circumference, through which the blades can rotatably pass; the bushing is disposed inside the hub and sleeved on the output shaft, and the bushing can rotate relative to the output shaft; the connecting disc is sleeved on the bushing via a bearing, so that the connecting disc can move axially with the bushing and can rotate relative to the bushing; the two ends of the connecting column are respectively hinged between the blades and the connecting disc, and the hinged position of the connecting column and the blades is offset from the axis of the mounting hole; when the bushing and the connecting disc move axially, the blades rotate relative to the mounting hole under the drive of the connecting column, and the pitch between adjacent blades changes accordingly.

[0011] In an alternative embodiment, the fan further includes a timing adjustment component connected to the bushing. The timing adjustment component is used to drive the bushing and connecting disc to move axially according to a predetermined cycle in order to adjust the pitch between adjacent blades.

[0012] According to another aspect of the embodiments of this application, a computer is provided, including a chassis and a fan module as described above. The chassis has a ventilation opening, a mounting bracket is connected to the inner wall of the chassis located around the ventilation opening, and a dust filter is located between the ventilation opening and the fan. The fan is used to draw in air through the ventilation opening.

[0013] In one alternative embodiment, the fan module also includes a dust storage box located at the bottom of the dust filter and detachably connected to the chassis or mounting bracket. A dust collection port is provided on the top of the dust storage box, located on the bottom edge of the dust filter away from the fan, for allowing falling particles to enter the dust storage box.

[0014] By tilting the dust filter, specifically by setting the distance between the top edge of the dust filter and the fan to be greater than the distance between its bottom edge and the fan, the dust filter is tilted forward, away from the fan. This tilt prevents more dust and other airborne particles from accumulating on the filter; instead, they fall off due to gravity after colliding with it. While some particles may still accumulate due to electrostatic adsorption and humidity, the tilted design allows for greater particle removal compared to a vertically positioned filter. This slows down the accumulation rate of dust and other particles, preventing severe clogging even after prolonged fan operation. Consequently, the computer or other electronic device using this fan module maintains good heat dissipation performance even after extended use.

[0015] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0017] Figure 1 A computer-view perspective perspective of an embodiment of this application;

[0018] Figure 2 A perspective view of a computer provided as an embodiment of this application;

[0019] Figure 3 An exploded view of a computer provided in an embodiment of this application;

[0020] Figure 4 A perspective view of the fan module provided in the embodiments of this application;

[0021] Figure 5 An exploded view of the fan module provided in the embodiments of this application;

[0022] Figure 6 A cross-sectional view of the fan module provided in this application embodiment applied in a computer scenario;

[0023] Figure 7 A perspective view of the mounting bracket in the fan module provided in the embodiments of this application;

[0024] Figure 8 This is a perspective view of the fan module provided in the embodiments of this application after the mounting cover and dust filter are assembled;

[0025] Figure 9 A perspective view of the dust storage box in the fan module provided in the embodiment of this application;

[0026] Figure 10 A perspective view of the fan in the fan module provided in the embodiments of this application;

[0027] Figure 11 An exploded view of the fan in the fan module provided in this application embodiment;

[0028] Figure 12An exploded view of the working parts in the fan module provided in the embodiments of this application;

[0029] Figure 13 A cross-sectional view of a working component in a fan module provided in an embodiment of this application;

[0030] Figure 14 This is a plan view of the mating point between the blades and the mounting holes in the fan module provided in the embodiments of this application;

[0031] Figure 15a and Figure 15b This is a side view of the blades in the fan module provided in the embodiments of this application under positive and negative pitch states.

[0032] The reference numerals in the detailed embodiments are as follows:

[0033] 50. Computer; 51. Chassis; 511. Ventilation opening; 512. Installation / removal port; 513. Maintenance door panel;

[0034] 40. Fan module; 401. Mounting bracket; 4011. Fan mounting hole; 4012. Connecting plate; 4013. Dust channel; 4014. Folded edge; 41. Fan; 411. Mounting frame; 42. Dustproof net; 43. Fixing cover; 431. Opening; 44. Dust storage box; 441. Dust collection port; 442. Dust discharge hole;

[0035] 30. Particulate matter;

[0036] 100. Timing adjustment component;

[0037] 200. Drive component; 220. Output shaft;

[0038] 300, Working part; 310, Hub; 311, Mounting hole; 320, Blade; 330, Connecting disc; 340, Bushing; 350, Bearing; 360, Connecting column. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0044] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0045] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0047] In order to ensure heat dissipation performance after long-term operation, the dust filters of current electronic devices such as computers need to be removed for cleaning or replacement after a predetermined service cycle. This is to ensure that there is sufficient airflow in the heat dissipation duct to cool down the internal electronic components.

[0048] However, in some special usage scenarios, such as fully automated oil refineries, field power transmission and transformation systems, mountainous or swampy areas, and other unsupervised industrial environments, there is not only a lot of dust in the environment, but equipment maintenance is also generally irregular. It is difficult to guarantee that the dust screen can be cleaned or replaced regularly. When the equipment is running for a long time and the dust screen cannot be cleaned or replaced, the ventilation openings are blocked by the dust deposited on the dust screen, which leads to increased fan load, reduced ventilation, increased internal temperature of the equipment, and the equipment hardware is in a high-temperature working environment for a long time, resulting in decreased performance and shortened life.

[0049] Based on this, this application designs a special installation angle for the dust filter, allowing more dust and other particulate matter in the air to fall off naturally after being filtered by the dust filter, rather than accumulating on the dust filter. This slows down the rate of dust accumulation on the dust filter and ensures that the equipment still has good heat dissipation performance after long-term operation.

[0050] According to one aspect of an embodiment of this application, a computer is provided, as detailed below. Figures 1 to 3 , Figure 1 and Figure 2 The image shows the internal structure of the computer from two different perspectives. Figure 3 The exploded structure of the computer is shown. As shown, the computer 50 includes a chassis 51 and a fan module 40. The chassis 51 has a ventilation opening 511, which allows for ventilation as follows: Figure 1 and Figure 2 The fan module 40 is located on the front panel of the chassis 51, as shown in the diagram. Of course, it can also be located in other positions, and there is no specific limitation here. The fan module 40 is connected to the inner wall around the ventilation port 511 on the chassis 51. The fan module 40 draws in air through the ventilation port 511 to form an airflow between the inside and outside of the chassis 51, thereby providing air cooling for the electronic components inside the chassis 51.

[0051] According to another aspect of the embodiments of this application, a fan module 40 is provided. This fan module 40 can be applied to the computer 50 in the above embodiments, and can also be applied to other types of electronic devices for heat dissipation. The following description mainly uses the application scenario of the computer 50 as an example, which does not constitute a limitation on the specific application field of the fan module 40. Please refer to... Figure 4 and Figure 5The figure shows the three-dimensional structure and exploded structure of the fan module 40. As shown in the figure, the fan module 40 includes a mounting frame 401, a fan 41 and a dustproof net 42. The fan 41 and the dustproof net 42 are both mounted on the mounting frame 401.

[0052] Specifically, a fan mounting hole 4011 can be provided at one end corner of the mounting bracket 401, and the fan 41 can be installed and fixed to one side of the mounting bracket 401 by screws or other fasteners. Of course, the fan 41 can also be installed on the mounting bracket 401 by clips or by plugging and interference fit, which is not limited here.

[0053] The dustproof mesh 42 can be made of metal mesh, synthetic fiber mesh, a composite mesh of metal and synthetic fibers, foam, etc. Please further consider... Figure 6 The cross-sectional structure of the fan module 40 applied in the computer 50 scenario is shown in the figure as indicated by the dashed arrow. The fan 41 is an exhaust fan that draws outside air into the chassis 51 for heat dissipation through the vent 511. The dust filter 42 is located on the air intake side of the fan 41, that is, between the fan 41 and the vent 511.

[0054] The dustproof net is set at an angle of 42, specifically, as follows: Figure 6 As shown, the distance D1 between the top edge of the dust filter 42 and the fan 41 is greater than the distance D2 between its bottom edge and the fan 41, which causes the dust filter 42 to tilt forward toward the vent 511. Based on this, when dust and other particulate matter 30 in the air are carried by the airflow ( Figure 6 (As shown by the dashed arrow) After floating and being blocked by the dust filter 42, the forward-leaning dust filter 42 can prevent more particles 30 from accumulating on it. After colliding with the dust filter 42, the particles 30 will fall off under their own gravity. Of course, due to uncontrollable factors such as electrostatic adsorption and humidity, some particles 30 will still accumulate on the dust filter 42. However, compared to a vertically arranged dust filter, the forward-leaning arrangement allows more particles 30 to be blocked and fall off, thus slowing down the deposition rate of dust and other particles 30 on the dust filter 42. This ensures that the dust filter 42 will not become seriously clogged after the fan module 40 has been working for a long time, thereby ensuring that the computer 50 or other electronic devices using the fan module 40 still have good heat dissipation performance after long-term operation.

[0055] For relatively flexible dustproof nets 42, such as foam, this application further proposes an implementation method to ensure the stability of its inclined installation. Please refer to the following for details. Figure 6 The mounting bracket 401 has a frame structure, and the dustproof net 42 is embedded within the mounting bracket 401. Specifically, the mounting bracket 401 can be configured as follows: Figure 6As shown, a connecting plate 4012 extends from the top and bottom edges toward the dustproof net 42. The dustproof net 42 is embedded in the connecting plate 4012, and the stability of the dustproof net 42 after tilting can be ensured by bonding or interference fitting between the top and bottom of the dustproof net 42 and the connecting plate 4012. By limiting the top and bottom of the dustproof net 42 with the connecting plate 4012, the dustproof net 42 can be better kept in a forward-tilted and fixed state.

[0056] To ensure that dust can be smoothly discharged from the air duct at the front end of the dust filter 42 after falling, such as Figure 6 As shown, a dust channel 4013 is provided on the bottom connecting plate 4012 so that dust and other particles 30 blocked by the dustproof net 42 and falling can pass through the dust channel 4013. Specifically, the dust channel 4013 can be directly connected to the external environment, so that the falling particles 30 can be directly discharged. Of course, a dust collection box or the like can also be set at the bottom of the dust channel 4013 to temporarily collect the dust and other particles 30 and process them uniformly later.

[0057] In some other embodiments, the connecting plate 4012 can also be disposed on the left and right sides of the mounting bracket 401. Correspondingly, after the dustproof net 42 is embedded in the mounting bracket 401, it is bonded and fixed to the connecting plate 4012 through its left and right edges or through an interference fit. Furthermore, the mounting bracket 401 can also be as follows... Figure 7 As shown, at least three of the four edges (top, bottom, left, and right) are provided with connecting plates 4012. The outer periphery of the dustproof net 42 is connected to the connecting plates 4012 by adhesive bonding or interference fit to achieve reliable assembly and fixation of the dustproof net 42. Further, as... Figure 7 As shown, the edge of the connecting plate 4012 can also be provided with a folded edge 4014. The folded edge 4014 can be connected to the inner wall of the chassis 51 by means of fastener connection, welding, snap-fit, etc., so as to realize the assembly of the mounting bracket 401 in the chassis 51.

[0058] In addition to the embedded installation method, the mounting bracket 401 can also be installed and fixed in a forward-tilted state by setting a support at the bottom and an extended hook at the top, with the bottom of the dustproof net 42 placed on the support and the top connected to the hook.

[0059] To facilitate the installation and removal of the dustproof net 42, such as Figure 4 and Figure 5 As shown, the fan module 40 may also include a mounting cover 43. Please refer to further details. Figure 7 The assembly structure of the fixed cover 43 and the dustproof net 42 shown is such that the dustproof net 42 is embedded in the inner circumference of the fixed cover 43, the fixed cover 43 is detachably embedded in the connecting plate 4012, and the inner circumference of the fixed cover 43 forms the air intake channel of the fan 41.

[0060] Specifically, the fixing cover 43 can be made of rigid plastic, metal, or other materials. The dustproof net 42 can be embedded in the fixing cover 43 using methods such as interference fit or adhesive bonding. The fixing cover 43 can be embedded in the connecting plate 4012 using methods such as plug-in, snap-fit, or threaded fastener connection to form a detachable connection. The advantage of this design is that by using the fixing cover 43 as an intermediate transition component, the dustproof net 42 can be easily installed and removed from the mounting bracket 401 for cleaning, replacement, and other operations.

[0061] Furthermore, the dustproof net 42 can be like Figure 8 The inner circumferential area of ​​the fixed cover 43 is filled as shown. Since the inner circumferential area of ​​the fixed cover 43 is the air intake channel of the fan 41, filling the air intake channel with the dustproof net 42 can better prevent dust from entering the chassis 51 and affecting the internal electronic components.

[0062] like Figure 5 and Figure 8 As shown, the bottom of the fixing cover 43 has an opening 431, through which fallen particles 30 can pass. In the case of a mounting bracket 401 with a connecting plate 4012 at its bottom, the opening 431 at the bottom of the fixing cover 43 corresponds to the dust channel 4013 on the bottom connecting plate 4012, and the fallen particles 30 pass through the opening 431 and the dust channel 4013 in sequence.

[0063] In many applications, computers 50 are typically placed on a support surface. Additionally, in industrial applications such as data centers, multiple computers 50 may be stacked together or placed on top of other equipment. Therefore, if dust and other particulate matter 30 are directly discharged from the chassis 51, they may accumulate on the support surface or on top of other equipment, causing dirt and other contaminants.

[0064] For this, please refer to Figures 4 to 6 The fan module 40 may also include a dust storage box 44; please refer to further details. Figure 9 , Figure 9The three-dimensional structure of the dust storage box 44 is shown. The dust storage box 44 can be disposed at the bottom of the dustproof net 42. The top of the dust storage box 44 has a dust collection port 441, which is located on the bottom edge of the dustproof net 42 away from the fan 41. When no other components are disposed at the bottom of the dustproof net 42, falling particles 30 can directly enter the dust storage box 44 through the dust collection port 441. When the bottom of the dustproof net 42 has the connecting plate 4012 and the fixing cover 43 mentioned in the above embodiment, the dust collection port 441 corresponds to the dust channel 4013 and the opening 431, ensuring that falling particles 30 can enter the dust storage box 44 through the dust channel 4013, the opening 431, and the dust collection port 441. The dust storage box 44 can temporarily store falling particles 30, preventing the particles 30 from being directly discharged and affecting its bearing surface or other equipment at the bottom.

[0065] For applications in computer 50, such as Figure 3 As shown, the bottom of the chassis 51 can have a disassembly port 512, and the dust storage box 44 can be detached and installed into the disassembly port 512 by means of snap-fit, hook-fit, magnetic attraction, etc. When it is necessary to process the dust in the dust storage box 44, the dust storage box 44 can be removed from the disassembly port 512 for unified processing of the dust and other particles 30 inside.

[0066] In addition to the dust storage box 44 being removably installed via the mounting port 512 at the bottom of the chassis 51, the dust storage box 44 can also be removably inserted into the chassis 51 using a drawer-type structure. Furthermore, as... Figure 3 As shown, the chassis 51 can be provided with a flip-up maintenance door 513 adjacent to the fan module 40. After opening the maintenance door 513, the dust storage box 44 can be taken out from the maintenance door 513 for unified treatment of the dust and other particulate matter 30 inside.

[0067] Considering the electromagnetic protection requirements of computer 50, the size of the openings on the chassis 51 has corresponding dimensional requirements. Furthermore, for use in outdoor and unmanned environments, in order to better expel particulate matter 30 from the dust storage box 44, such as… Figure 4As shown, a dust collection box 44 has a dust discharge hole 442 at its bottom. This hole allows at least some of the particles 30 inside the dust collection box 44 to be discharged, achieving a certain degree of dust leakage. The opening area of ​​the dust discharge hole 442 must meet electromagnetic protection requirements. In practical applications, when other devices are stacked at the bottom of the computer 50, dust and other particles 30 will be temporarily stored in the dust collection box 44. When these devices are removed for maintenance or other operations, the dust and other particles 30 can be discharged through the dust discharge hole 442. Furthermore, when removing the dust collection box 44 from the chassis 51 to handle the internal dust, shaking the dust collection box 44 can facilitate the discharge of dust through the dust discharge hole 442.

[0068] In order to further slow down the rate of dust accumulation on the dustproof net 42, the fan 41 can be configured to form a reverse airflow by means of reverse rotation or adjustable blade pitch. The reverse airflow of the fan 41 toward the dustproof net 42 will blow off at least some of the dust and other particles 30 deposited on the dustproof net 42. The blown-off particles 30 can be discharged from the vent 511 or fall off from below the dustproof net 42.

[0069] Considering that the blades of fan 41 are typically designed with a predetermined rotation direction to achieve a better PQ curve, the reverse airflow generated by rotating the blades in the opposite direction often results in a much weaker reverse wind force than the forward wind force. This makes it difficult to effectively blow away the dust adhering to the dust filter 42. Therefore, to obtain a stronger reverse wind force, this application considers using a method where each blade can rotate independently along its axial direction, thereby changing the blade pitch and thus changing the wind direction to achieve effective dust removal.

[0070] Please refer to details. Figure 10 and Figure 11 , Figure 10 The three-dimensional structure of fan 41 is shown. Figure 11 The exploded structure of fan 41 is shown. As shown, fan 41 includes a drive element 200 and a working element 300, the drive element 200 having an output shaft 220. Please refer to further details. Figure 12 and Figure 13 , Figure 12 The exploded structure of workpiece 300 is shown. Figure 13A cross-sectional view of the working component 300 is shown. The working component 300 includes a hub 310, blades 320, a connecting disc 330, a bushing 340, a bearing 350, and a connecting column 360. The hub 310 is fixedly connected to the output shaft 220, and the hub 310 has a mounting hole 311 circumferentially formed, through which the blades 320 are rotatably inserted. Furthermore, the fan 41 may also include a mounting frame 411, in which the drive component 200 is fixedly disposed, and the working component 300 is housed within the mounting frame 411.

[0071] The bushing 340 is located inside the hub 310 and sleeved on the output shaft 220. The bushing 340 can rotate relative to the output shaft 220. This can also be understood as the bushing 340 not rotating with the output shaft 220 when the fan 41 is running.

[0072] The connecting disc 330 is sleeved on the bushing 340 through the bearing 350, so that the connecting disc 330 can move axially with the bushing 340 and can rotate relative to the bushing 340. That is, the connecting disc 330, the bushing 340 and the bearing 350 move synchronously along the axial direction, and the connecting disc 330 can rotate relative to the bushing 340 through the bearing 350.

[0073] The two ends of the connecting post 360 are respectively hinged between the blade 320 and the connecting disk 330, and as... Figure 14 The structure at the mating point between the middle blade 320 and the mounting hole 311 is shown in the figure. The dashed line in the figure represents the edge of the mounting hole 311. The position M where the connecting post 360 and the blade 320 are hinged is offset from the axis N of the mounting hole 311.

[0074] When the bushing 340 and the connecting plate 330 move axially, the blade 320 rotates relative to the mounting hole 311 under the drive of the connecting column 360. Since the position M where the connecting column 360 and the blade 320 are hinged is deviated from the axis N of the mounting hole 311, the pitch between adjacent blades 320 will change accordingly.

[0075] Specifically, the positive pitch state is as follows: Figure 15a As shown, when blade 320 is in this state, fan 41 draws air inward to cool computer 50. Negative pitch state is as follows: Figure 15b As shown, when the blade 320 is in this state, the fan 41 blows air outward to remove dust from the dust filter 42.

[0076] Please see Figure 13 During the operation of fan 41, output shaft 220 drives blades 320 to rotate via hub 310. When blades 320 rotate, they will drive internal connecting plate 330 to rotate as well. However, since connecting plate 330 and bushing 340 are connected by bearing 350, and bushing 340 and output shaft 220 can rotate relative to each other, bushing 340 will not rotate with connecting plate 330.

[0077] Please refer to it again. Figure 11 In order to realize the timed switching between the cooling mode and the dust removal mode of the fan 41, the fan 41 may also include a timed adjustment component 100. The timed adjustment component 100 may adopt a mechanical spring-driven timer or a timer method that combines digital timing and mechanical drive, etc. The specific method is not limited here. The timed adjustment component 100 is connected to the bushing 340. The timed adjustment component 100 can drive the bushing 340 and the connecting plate 330 to move axially according to a predetermined cycle in order to adjust the pitch between adjacent blades 320.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A fan module, characterized in that, include: Mounting rack; A fan is mounted on the mounting bracket; A dust filter is installed on the mounting bracket and located on the air intake side of the fan. The dust filter is inclined, and the distance between the top edge of the dust filter and the fan is greater than the distance between the bottom edge of the dust filter and the fan. The dust filter is used to filter the air drawn in by the fan to block at least some of the particles in the air and cause them to fall off.

2. The fan module according to claim 1, characterized in that, The edge of the mounting bracket extends toward the dustproof net to form a connecting plate, and the dustproof net is detachably embedded in the connecting plate.

3. The fan module according to claim 2, characterized in that, The fan module also includes a fixing cover, the dustproof mesh is embedded in the inner circumference of the fixing cover, and the fixing cover is embedded and fixed in the connecting plate body; The bottom of the fixing cover has an opening for falling particles to pass through.

4. The fan module according to claim 1, characterized in that, The fan module also includes a dust storage box, which is located at the bottom of the dustproof net. A dust collection port is provided at the top of the dust storage box, which is located on the bottom edge of the dustproof net away from the fan. The dust collection port is used to allow falling particles to enter the dust storage box.

5. The fan module according to claim 4, characterized in that, The bottom of the dust storage box is provided with a dust discharge hole, which is used to discharge at least part of the particles in the dust storage box.

6. The fan module according to any one of claims 1-5, characterized in that, The fan is configured to generate a reverse airflow to blow off at least some of the particles adsorbed on the dust filter by blowing air onto it.

7. The fan module according to claim 6, characterized in that, The fan includes a driving component and a working component; The drive unit has an output shaft; The working parts include: a hub, blades, a connecting disc, a bushing, a bearing, and a connecting column. The hub is fixedly connected to the output shaft. The hub has a mounting hole along its circumference, and the blades are rotatably inserted into the mounting hole. The bushing is disposed inside the hub and sleeved on the output shaft, and the bushing can rotate relative to the output shaft; The connecting disc is sleeved onto the bushing via the bearing, so that the connecting disc can move axially with the bushing and can rotate relative to the bushing. The two ends of the connecting post are respectively hinged between the blade and the connecting disk, and the position where the connecting post is hinged to the blade is offset from the axis of the mounting hole; When the bushing and the connecting disc move axially, the blades rotate relative to the mounting holes under the drive of the connecting column, and the pitch between adjacent blades changes accordingly.

8. The fan module according to claim 7, characterized in that, The fan also includes a timing adjustment component connected to the bushing. The timing adjustment component is used to drive the bushing and the connecting disc to move axially according to a predetermined cycle in order to adjust the pitch between adjacent blades.

9. A computer, characterized in that, The device includes a chassis and a fan module as described in any one of claims 1-8, wherein the chassis has a ventilation opening, the mounting bracket is connected to the inner wall of the chassis located around the ventilation opening, and the dust filter is located between the ventilation opening and the fan, and the fan is used to draw in air through the ventilation opening.

10. The computer according to claim 9, characterized in that, The fan module also includes a dust storage box, which is located at the bottom of the dustproof mesh and is detachably connected to the chassis or the mounting bracket. The dust storage box has a dust collection port at the top, which is located on the bottom edge of the dustproof net away from the fan. The dust collection port is used to allow falling particles to enter the dust storage box.

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