WO2019136829A1 - 防尘罩及散热装置 - Google Patents

防尘罩及散热装置 Download PDF

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Publication number
WO2019136829A1
WO2019136829A1 PCT/CN2018/080877 CN2018080877W WO2019136829A1 WO 2019136829 A1 WO2019136829 A1 WO 2019136829A1 CN 2018080877 W CN2018080877 W CN 2018080877W WO 2019136829 A1 WO2019136829 A1 WO 2019136829A1
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WO
WIPO (PCT)
Prior art keywords
rod
dust cover
dust
fixing
cover body
Prior art date
Application number
PCT/CN2018/080877
Other languages
English (en)
French (fr)
Inventor
南景洋
李屹
Original Assignee
深圳光峰科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳光峰科技股份有限公司 filed Critical 深圳光峰科技股份有限公司
Publication of WO2019136829A1 publication Critical patent/WO2019136829A1/zh

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0213—Venting apertures; Constructional details thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20181—Filters; Louvers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/40—Movement of components
    • F05D2250/41—Movement of components with one degree of freedom
    • F05D2250/411—Movement of components with one degree of freedom in rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/90—Variable geometry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/32—Retaining components in desired mutual position by means of magnetic or electromagnetic forces

Definitions

  • the present invention relates to the field of heat dissipating devices and accessories thereof, and more particularly to a heat dissipating device applied to a power module or the like and a dust cover thereof.
  • the heat dissipating device commonly used in electronic devices is generally susceptible to the reliability of the product due to the entry of dust impurities during the heat dissipation process, and needs to be frequently disassembled and cleaned; the heat dissipation performance is usually limited as a product performance in various fields, for example,
  • the biggest breakthrough of projection technology is the application of laser light source. Compared with traditional light source, the advantages of laser light source are obvious.
  • the power module provides a source of energy for the laser light source, and the power module generates heat when it is working, and generally dissipates heat by air cooling.
  • a fan is usually disposed on the casing of the power module, and the fan works to draw airflow into the interior of the power module to dissipate heat from the components.
  • the airflow usually contains impurities such as dust. These impurities will adhere to the components after entering the power module. After a period of time, the components may be affected. Therefore, the airflow needs to be filtered before the airflow enters the power module. Therefore, it is necessary to design a power dust cover to filter the airflow. In practical applications, the dustproof sponge of the dust cover should be cleaned or replaced periodically.
  • the dust cover of the prior art is inconvenient to be disassembled, which is not conducive to later maintenance.
  • a dust cover and a heat dissipating device are provided to solve the problem that the heat dissipating device in the prior art is inconvenient to clean and disassemble, which is disadvantageous for subsequent maintenance.
  • an embodiment of the present invention provides a dust cover including a cover body, an air filter disposed in the cover body, and a detachable mounting of the air filter into the cover body. Retractable plunger assembly.
  • the pressing rod assembly comprises a fixing rod connected to the cover body, a guiding rod rotatably connected to the fixing rod, and the fixing rod is connected by a hinge and driven by the guiding rod A follower lever that rotates around the hinge.
  • the cover body is provided with a plurality of concentric annular vents, and the air filter covers the vents.
  • the fixing rod has a cross-shaped structure, and includes a central portion at the center and a cross-shaped fixing portion radiating from the central portion to the periphery.
  • the fixing rod is connected to the cover body through the fixing portion, and the guiding rod is rotatably connected to On the center portion.
  • the end portion of the fixing portion away from the central portion is provided with a rivet nut
  • the cover body is provided with a through hole corresponding to the rivet nut, and the fixing rod passes through the through hole A screw for the through hole is fixed to the cover to press the dust filter.
  • the dust cover further comprises a magnet with a stud connected to the rivet nut, and the magnet is used to connect the dust cover to the heat dissipation fan.
  • the central portion is provided with a knob connected to the guiding rod, and the knob drives the guiding rod to rotate in the circumferential direction with the central portion as a rotating shaft.
  • the guiding rod is a cross-shaped structure including a guiding arm radiating radially around the center, the driven rod is provided with a sliding rail matched with the guiding arm, and the guiding rod passes the sliding rail The driven rod is pushed around the hinge to extend around the periphery of the cover and press the air filter.
  • the driven rod includes a first driven rod and a second driven rod respectively connected to two sides of the fixed rod, and one ends of the first driven rod and the second driven rod respectively
  • the adjacent fixing portions are connected, and the other ends of the first driven rod and the second driven rod are respectively connected by a hinge, and the first driven rod and the second driven rod are respectively connected by a hinge. motion.
  • the pressing rod assembly includes a first state in which the driven rod is contracted inward and a second state in which the driven rod is outwardly expanded, the guiding arm being included in the second state and the fixing portion a first guiding arm that is coincident and a second guiding arm that is bent and extended from the first guiding arm, and the second guiding arm pushes the driven lever through the sliding rail.
  • the first guiding arm is provided with a locking hole
  • the fixing rod is provided with a threaded hole corresponding to the locking hole, and when the pressing rod assembly is in the second state, passes through the locking hole The locking screw locks the plunger assembly.
  • the cover body is provided at four corners with a sealing strip that is in close contact with the inner surface of the cover.
  • the present invention also provides a heat sink comprising a heat sink fan and a dust cover as described above.
  • the dust cover comprises a magnet
  • the frame of the heat dissipation fan is provided with a metal or magnetic component that is attracted to the magnet.
  • the dust cover and the heat dissipation device of the present invention comprise a cover body, an air filter disposed in the cover body, and a retractable pressure bar for detachably mounting the air filter net into the cover body Component.
  • the dust cover of the invention can realize the dustproof effect on the heat dissipation airflow of the heat dissipation device, and is convenient for disassembly and replacement, and is convenient for maintenance.
  • FIG. 1 is a schematic structural view of a dustproof net of the present invention
  • FIG. 2 is a schematic structural view of another angle of the air filter of the present invention.
  • FIG. 3 is a schematic structural view of a cover body of a dust cover of the present invention.
  • FIG. 4 is a schematic structural view of another embodiment of the cover of the dust cover of the present invention.
  • Figure 5 is a schematic structural view of the pressure bar assembly of the present invention in a first state
  • FIG. 6 is a schematic structural view of another angle of the pressing rod assembly of the present invention in a first state
  • Figure 7 is a schematic structural view of the pressure bar assembly of the present invention in a second state
  • Figure 8 is a structural view showing another angle of the pressing rod assembly of the present invention in a second state
  • Figure 9 is a side view of the pressure bar assembly of the present invention.
  • Figure 10 is a schematic view showing the structure of a magnet of the present invention.
  • the present invention provides a dust cover applied to a heat sink and a heat sink using the dust cover.
  • the heat dissipating device provided by the invention is provided with a fan, and the airflow is sucked into the power module by the fan working, so that the heat generated by the power module in the working state can be reduced, and the heat dissipation of the power module can be realized.
  • the dust cover provided by the invention can prevent the dust impurities and the like entrained in the airflow from entering the power module and affecting the performance of the product.
  • the dust cover of the present invention includes a cover 1, an air filter 2 provided on the cover 1, and a strut assembly for assembling the air filter 2 to the cover 1. 3.
  • the cover body 1 is made of aluminum alloy sheet metal, and includes a body portion and a bent portion 13 bent from the body portion to extend the inner space of the surrounding wall.
  • the body portion of the cover body 1 is square.
  • a plurality of concentric annular vents are disposed thereon, and the external airflow enters the heat dissipating device through the vent, and the heat flow generated by the fan in the heat dissipating device is discharged through the vent.
  • the outer diameter of the annular vent having the largest diameter on the cover 1 is larger than the diameter of the circular surface formed by the rotation of the fan, so that the usual airflow can be ensured.
  • the sealing portion 13 of the cover body 1 is provided with four sealing strips 5, and the sealing strip 5 is provided with a rubber backing, and can be attached to the bent portion 13 of the cover body.
  • the material is a sponge, which has a certain amount of compression, and the sealing strip has a certain amount of compression.
  • the thickness is slightly larger than the gap between the inner surface of the bent portion 13 of the cover 1 and the power supply case.
  • the dustproof net 2 is a dustproof sponge disposed on the inner side surface of the cover body 1 facing the fan.
  • the diameter of the edge of the dustproof net 2 is larger than the maximum annular vent, that is, the dustproof sponge completely covers the vent. In this way, foreign matter or dust can be prevented from entering the inside of the heat sink.
  • the pressing rod assembly 3 is a link mechanism, and a rectangular area surrounded by the bent portion 13 of the four sides of the cover body 1 can cover the protective net of the fan, and the area of the rectangular area is smaller than that of the dustproof net 2 .
  • the area, the pressing rod assembly 3 is attached to the cover 1 from a rectangular area surrounded by the bent portion 13 of the cover 1, and the edge of the dustproof net 2 is not pressed.
  • the pressure bar assembly 3 includes a first state of inward contraction and a second state of outward expansion.
  • the edge of the pressure bar assembly 3 is enlarged, and the extreme position can be covered to the air filter.
  • the edge of 2 by fastening the second state, presses the edge of the dust sponge to achieve a sufficient filtering of the air flow.
  • the pressing rod assembly 3 includes a fixing rod 31 connected to the cover body 1, a guiding rod 34 rotatably connected to the fixing rod 31, and a connecting rod 37 connected to the fixing rod 31, and the hinge rod 34 can be driven by the guiding rod 34.
  • the fixing rod 31 has a cross-shaped structure including a central portion at the center and a fixing portion radiating from the center portion to the periphery, and the fixing rod 31 is connected to the cover body 1 through the fixing portion.
  • the fixed portion is provided with a circumferentially uniform rivet nut 32.
  • the cover body 1 is provided with a through hole 11 corresponding to the rivet nut 32, and the fixing rod 31 is fixed to the cover by a screw 61 passing through the through hole 11.
  • the rivet nuts 32 have a total of four, equally spaced and disposed symmetrically around the circumference of the cover.
  • the dust cover further includes a strong magnet 4 with a stud 41 matched with the rivet nut 32.
  • the side surface of the cover 1 adjacent to the pressing rod assembly 3 is also provided with a fixing nut 12, and the magnet 4 The fixing is completed by the rivet nut 32 and the fixing nut 12.
  • the stud 41 of the strong magnet 4 is provided with a rubber spacer 42 to prevent the thread of the stud from coming loose.
  • the position of the strong magnet 4 corresponds to the position of the four steel fixing screws of the fan on the power module.
  • the dust cover is magnetically attracted to the heat dissipating device by the strong magnet, and the dust cover can be easily disassembled and installed.
  • the position of the powerful magnet 4 corresponds to the position of the four steel fixing screws of the fan on the power module, that is, the strong magnet 4 is attracted to the nut plane of the four steel screws.
  • a guide rod 34 is rotatably coupled to the center portion. Further, the central portion is provided with a knob 33 connected to the guiding rod 34. The knob 33 drives the guiding rod 34 to rotate in the circumferential direction along the plane of the dustproof net 2 with the central portion as the rotating shaft.
  • the guiding rod 34 is also a cross-shaped structure including a guiding arm radiating radially around the center, and the driven rod is provided with a sliding rail matched with the guiding arm, and the guiding rod 34 pushes the driven rod around the hinge 37 through the sliding rail The periphery of the cover 1 is stretched and the air filter is pressed.
  • the guiding arm includes a first guiding arm that coincides with the fixing portion in the second state and a second guiding arm that is bent and extended from the first guiding arm, and the second guiding arm pushes the driven lever (35, 36) through the sliding rail .
  • the follower bar includes a first follower lever 35 and a second follower lever 36 respectively connected to both sides of the fixed lever 31, and the first follower lever 35 and the second follower lever 36 are respectively connected to the corresponding fixing portion through a hinge 37 on.
  • a second hinge 38 is disposed between the first follower lever 35 and the second follower lever 36, and the first follower lever 35 and the second follower lever 36 can be relatively moved by the second hinge 38.
  • the fixing rod 31 has a cross-shaped structure, and has a total of four fixing portions and corresponding four hinges 37.
  • Each of the hinges 37 is respectively connected with a first driven rod 35 and a second driven rod. 36.
  • the driven rod is expanded or contracted outwardly about the hinge 37.
  • the knob 33 of the pressing rod assembly 3 is rotated clockwise, and the knob 33 drives the guiding rod 34 to rotate clockwise, and the guiding rod 34 pushes the first driven rod 35 and the second driven rod 36 to the outside of the hinge 37.
  • Rotating, moving outward around the second hinge 38, the edge of the pressing rod assembly 3 is enlarged, and the extreme position covers the edge of the dustproof sponge to realize the fixing of the dustproof sponge.
  • the first guiding arm is provided with a locking hole 341
  • the fixing rod is provided with a threaded hole 311 corresponding to the locking hole 341.
  • the present invention also provides a heat sink comprising the dust cover described above.
  • the dust cover comprises a magnet with a stud, and the frame of the heat dissipating fan is provided with a metal or a magnetic component that is attracted to the magnet, and the connection between the dust cover and the heat dissipating fan is completed by the adsorption force of the magnet. It has the advantages of convenient disassembly and maintenance and high reliability.
  • the dust cover and the heat dissipation device of the present invention comprise a cover body, an air filter disposed in the cover body, and a retractable pressure bar for detachably mounting the air filter net into the cover body Component.
  • the dust cover of the invention can realize the dustproof effect on the heat dissipation airflow of the heat dissipation device, and is convenient for disassembly and replacement, and is convenient for maintenance.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Sealing Devices (AREA)

Abstract

一种防尘罩包括罩体（1）、设置在罩体中的防尘网（2）、以及用于将防尘网可拆卸地安装到罩体中的可伸缩的压杆组件（3）。压杆组件（3）包括向内收缩的第一状态和向外扩张的第二状态，当处于第二状态时，压杆组件的边缘扩大，极限位置可以覆盖到防尘网的边缘，通过对第二状态中的压杆组件的紧固，压紧防尘海绵的边缘，充分过滤气流。这种防尘罩能够实现对散热装置的散热气流的防尘作用，并且便于拆卸和更换。

Description

防尘罩及散热装置 技术领域
本发明涉及散热装置及其配件领域，尤其涉及一种应用于电源模块等的散热装置及其防尘罩。
 背景技术
目前，电子设备普遍使用的散热装置，在散热过程中通常容易由于尘埃杂质等进入而影响产品的可靠性，而需要经常进行拆卸和清洗；散热性能通常作为各个领域中产品性能的限制条件，例如，投影技术最大的突破是激光光源的应用，相比传统光源，激光光源优势明显。
 技术问题
在激光投影装置中，电源模块为激光光源提供能量来源，电源模块在工作是会产生热量，一般通过风冷方式散热。通常在电源模块的壳体上设置风扇，风扇工作将气流吸入到电源模块的内部给元器件散热。然而气流中通常带有尘埃等杂质，这些杂质进入到电源模块内部后会附着在元器件上，经过一段时间后可能会影响元器件的正常工作，因此需要在气流进入电源模块前将气流进行过滤，故有必要设计电源防尘罩对气流进行过滤。在实际应用中，防尘罩的防尘海绵要定期清洗或更换，现有技术中的防尘罩拆卸不便，不利于后期的维护。
因此，实有必要提供一种新的防尘罩及散热装置，以解决上述问题。
 
 技术解决方案
本发明实施例中提供一种防尘罩及散热装置，以解决现有技术中的散热装置清理和拆卸不便、不利于后续维护的问题。
为实现上述目的，本发明实施例提供一种防尘罩，包括罩体、设置在所述罩体中的防尘网以及用于将所述防尘网可拆卸地安装到所述罩体中的可伸缩的压杆组件。
优选的，所述压杆组件包括与所述罩体相连接的固定杆、与所述固定杆可转动连接的导向杆以及与所述固定杆通过铰链连接并在所述导向杆的驱动下可绕铰链转动的从动杆。
优选的，所述罩体上设置有多个同心环形的通风口，所述防尘网覆盖所述通风口。
优选的，所述固定杆为十字形结构，包括位于中央的中心部和自中心部向四周辐射延伸的十字形的固定部，固定杆通过固定部与罩体相连，导向杆可旋转地连接到所述中心部上。
优选的，所述固定部远离所述中心部的端部上均设置有压铆螺母，所述罩体上设置有与所述压铆螺母对应设置的通孔，所述固定杆通过穿过所述通孔的螺丝固定在所述罩体上从而将防尘网压紧。
优选的，所述防尘罩还包括带有螺柱的磁铁，所述螺柱与所述压铆螺母相连接，所述磁铁用于将所述防尘罩与散热风扇相连。
优选的，所述中心部上设置有与所述导向杆相连动的旋钮，所述旋钮带动所述导向杆以中心部为转轴沿周向转动。
优选的，所述导向杆为十字形结构，包括沿中心向四周辐射的导向臂，所述从动杆上设置有与所述导向臂相匹配的滑轨，所述导向杆通过所述滑轨推动所述从动杆绕铰链向所述罩体周缘伸展并压紧所述防尘网。
优选的，所述从动杆包括分别与固定杆的两侧相连的第一从动杆和第二从动杆，所述第一从动杆和所述第二从动杆的一端分别与所述相邻固定部相连，所述第一从动杆和所述第二从动杆的另一端分别通过铰链相连接，所述第一从动杆和第二从动杆之间通过铰链实现相对运动。
优选的，所述压杆组件包括所述从动杆向内收缩的第一状态和所述从动杆向外扩张的第二状态，所述导向臂包括在第二状态时与所述固定部重合的第一导向臂和自所述第一导向臂弯折延伸的第二导向臂，所述第二导向臂通过所述滑轨推动所述从动杆。
优选的，所述第一导向臂上设置有锁定孔，所述固定杆上设置有与所述锁定孔对应的螺纹孔，当所述压杆组件处于第二状态时，通过穿过锁定孔的锁定螺钉实现压杆组件的锁定。
优选的，所述罩体的四角处设置有紧贴所述罩体内表面的密封条。
本发明还提供了一种散热装置，包括散热风扇以及如上述的防尘罩。
优选的，所述防尘罩包括磁铁，所述散热风扇的框架设有与磁铁相吸的金属或磁性部件。
 
 有益效果
本发明的防尘罩及散热装置，包括罩体、设置在所述罩体中的防尘网以及用于将所述防尘网可拆卸地安装到所述罩体中的可伸缩的压杆组件。本发明的防尘罩能够实现对散热装置的散热气流的防尘作用，并且便于拆卸和更换，方便维护。
 附图说明
图1为本发明防尘网的结构示意图；
图2为本发明防尘网另一角度的结构示意图；
图3为本发明防尘罩的罩体的结构示意图；
图4为本发明防尘罩的罩体的另一角度的结构示意图；
图5为本发明压杆组件处于第一状态的结构示意图；
图6为本发明压杆组件处于第一状态的另一角度的结构示意图；
图7为本发明压杆组件处于第二状态的结构示意图；
图8为本发明压杆组件处于第二状态的另一角度的结构示意图；
图9为本发明压杆组件的侧视图；
图10为本发明磁铁的结构示意图。
 本发明的实施方式
下面结合附图和具体实施例对本发明作进一步详细描述，但不作为对本发明的限定。
本发明提供一种应用于散热装置的防尘罩以及应用该防尘罩的散热装置。尤其是一种应用于激光光源中的电源模块的散热装置及其防尘罩。本发明提供的散热装置内部设置有风扇，通过风扇工作将气流吸入到电源模块的内部，可以降低电源模块在工作状态下产生的热量，实现电源模块的散热。在散热装置工作过程中，本发明提供的防尘罩可以避免气流中夹带的尘埃杂质等进入电源模块内部而影响产品的性能。
如图1和图2所示，本发明中的防尘罩包括罩体1、设置在罩体1上的防尘网2以及用于将防尘网2装配到罩体1上的压杆组件3。
如图3和图4所示，罩体1是由铝合金钣金折弯制成，包括本体部和自本体部弯折延伸围城内部空间的弯折部13，罩体1的本体部呈正方形，其上设置有若干同心环形的通风口，外界气流通过通风口进入散热装置内部，同时散热装置内的风扇产生的带有热量气流通过通风口排出。罩体1上直径最大的环形通风口的外径大于风扇旋转的形成的圆面直径，这样，可以保证气流的通常。
罩体1的弯折部13处设置有四个密封条5，密封条5自带背胶，可以粘贴在罩体的弯折部13处，材质为海绵，具有一定的压缩量，密封条的厚度略大于罩体1弯折部13的内表面与电源壳体的间隙。
防尘网2为防尘海绵，设置在罩体1朝向风扇的内侧表面，防尘网2的边缘直径大于最大环形的通风口，即防尘海绵完全覆盖通风口。这样，可以避免异物或灰尘进入散热装置内部。
如图5到图9所示，压杆组件3为一个连杆机构， 罩体1四边的折弯部13所包围的矩形区域可以覆盖风扇的防护网，矩形区域的面积小于防尘网2的面积，压杆组件3从罩体1弯折部13所包围的矩形区域安装到罩体1上，防尘网2的边缘则不会被压到。
压杆组件3包括向内收缩的第一状态和向外扩张的第二状态，当压杆组件3处于扩张的第二状态时，压杆组件3的边缘扩大，极限位置可以覆盖到防尘网2的边缘，通过对第二状态的紧固，压紧防尘海绵的边缘，实现充分过滤气流的作用。
具体的，压杆组件3包括与罩体1相连接的固定杆31、与固定杆31可转动连接的导向杆34以及与固定杆31通过铰链37连接，在导向杆34的驱动下可绕铰链转动的从动杆（35、36）。
固定杆31为十字形结构，包括位于中央的中心部和自中心部向四周辐射延伸的固定部，固定杆31通过固定部与罩体1相连。具体的，固定部上设置有圆周均布的压铆螺母32，罩体1上设置有与压铆螺母32对应设置的通孔11，固定杆31通过穿过通孔11的螺丝61固定在罩体1上。在本实施方式中，压铆螺母32共有四个，等间距且沿中心对称设置在罩体的四周。
参照图10所示，防尘罩还包括与压铆螺母32相匹配的带有螺柱41的强力磁铁4，罩体1靠近压杆组件3的一侧表面也设置有固定螺母12，磁铁4通过压铆螺母32和固定螺母12完成固定。进一步的，强力磁铁4的螺柱41上设置有橡胶垫片42以防止螺柱的螺纹松脱，强力磁铁4的位置对应于电源模块上风扇的四个钢制固定螺钉的位置。防尘罩通过该强力磁铁与散热装置以磁力吸附的方式连接在一起，可以方便的实现防尘罩的拆卸与安装。具体的，强力磁铁4的位置对应于电源模块上风扇的四个钢制固定螺钉的位置，即强力磁铁4吸附在四个钢制螺钉的螺帽平面上。
导向杆34可旋转地连接到所述中心部上。进一步的，中心部上设置有与导向杆34相连动的旋钮33，旋钮33带动导向杆34以中心部为转轴沿防尘网2所在平面沿周向转动。导向杆34也为十字形结构，包括沿中心向四周辐射的导向臂，从动杆上设置有与导向臂相匹配的滑轨，导向杆34通过所述滑轨推动从动杆绕铰链37向罩体1周缘伸展并压紧防尘网。
导向臂包括在第二状态时与固定部重合的第一导向臂和自第一导向臂弯折延伸的第二导向臂，第二导向臂通过所述滑轨推动从动杆（35、36）。从动杆包括分别与固定杆31的两侧相连的第一从动杆35和第二从动杆36，第一从动杆35和第二从动杆36分别通过铰链37连接到相应固定部上。此外，第一从动杆35和第二从动杆36之间设置有第二铰链38，第一从动杆35和第二从动杆36可通过第二铰链38实现相对运动。在本实施方式中，固定杆31为十字形结构，共具有四个固定部和相应的四个铰链37，每个铰链37上分别连接有一个第一从动杆35和一个第二从动杆36。在导向杆34的推动或拉动下，使得从动杆绕铰链37向外侧扩展转动或收缩。
在实际使用过程中，顺时针旋转压杆组件3的旋钮33，旋钮33带动导向杆34顺时针转动，则导向杆34推动第一从动杆35、第二从动杆36绕铰接37向外侧转动，绕第二铰接38向外侧移动，压杆组件3的边缘扩大，极限位置覆盖到防尘海绵的边缘，实现防尘海绵的固定。
进一步的，在本实施方式中，第一导向臂上设置有锁定孔341，固定杆上设置有与锁定孔341对应的螺纹孔311，当压杆组件3通过旋转处于第二状态将防尘网2压紧时，可通过穿过锁定孔的锁紧螺钉39实现压杆组件的固定。此时的状态，一来可以压紧防尘网，充分过滤气流；二来可以减少从动杆阻挡气流的截面积，尽可能多通过气流，避免影响散热效果。
当防尘罩需要维护时，将防尘罩从电源模块上取下后，旋松压杆组件的锁紧螺钉39，逆时针旋转旋钮33，第一从动杆35、第二从动杆36绕铰接37向内侧转动，绕第二铰接38向内侧移动，海绵压杆3所形成的边缘缩小至极限位置，旋松压杆组件的四个固定螺丝61，将压杆组件3从罩体1上取下，将防尘网2从罩体1内取出进行更换或清洗，完毕后将清洁后的或替换的防尘网2放入到罩体1中，并安装海绵压杆3且调整从动杆位置后，安装在电源模块风扇的外侧。
本发明还提供了一种散热装置，包括上述的防尘罩。其中，防尘罩包括带有螺柱的磁铁，散热风扇的框架上设有与磁铁相吸的金属或磁性部件，通过磁铁的吸附力完成防尘罩与散热风扇的连接。其具有方便拆卸和维护，可靠性能高的有益效果。
本发明的防尘罩及散热装置，包括罩体、设置在所述罩体中的防尘网以及用于将所述防尘网可拆卸地安装到所述罩体中的可伸缩的压杆组件。本发明的防尘罩能够实现对散热装置的散热气流的防尘作用，并且便于拆卸和更换，方便维护。
当然，以上是本发明的优选实施方式。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明基本原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。
 

Claims (14)

  1. 一种防尘罩，其特征在于，包括罩体、设置在所述罩体中的防尘网以及用于将所述防尘网可拆卸地安装到所述罩体中的可伸缩的压杆组件。
  2. 根据权利要求1所述的防尘罩，其特征在于，所述压杆组件包括与所述罩体相连接的固定杆、与所述固定杆可转动连接的导向杆以及与所述固定杆通过铰链连接并在所述导向杆的驱动下可绕铰链转动的从动杆。
  3. 根据权利要求1所述的防尘罩，其特征在于，所述罩体上设置有多个同心环形的通风口，所述防尘网覆盖所述通风口。
  4. 根据权利要求2所述的防尘罩，其特征在于，所述固定杆为十字形结构，包括位于中央的中心部和自中心部向四周辐射延伸的十字形的固定部，固定杆通过固定部与罩体相连，导向杆可旋转地连接到所述中心部上。
  5. 根据权利要求4所述的防尘罩，其特征在于，所述固定部远离所述中心部的端部上均设置有压铆螺母，所述罩体上设置有与所述压铆螺母对应设置的通孔，所述固定杆通过穿过所述通孔的螺丝固定在所述罩体上从而将防尘网压紧。
  6. 根据权利要求5所述的防尘罩，其特征在于，所述防尘罩还包括带有螺柱的磁铁，所述螺柱与所述压铆螺母相连接，所述磁铁用于将所述防尘罩与散热风扇相连。
  7. 根据权利要求4所述的防尘罩，其特征在于，所述中心部上设置有与所述导向杆相连动的旋钮，所述旋钮带动所述导向杆以中心部为转轴沿周向转动。
  8. 根据权利要求7所述的防尘罩，其特征在于，所述导向杆为十字形结构，包括沿中心向四周辐射的导向臂，所述从动杆上设置有与所述导向臂相匹配的滑轨，所述导向杆通过所述滑轨推动所述从动杆绕铰链向所述罩体周缘伸展并压紧所述防尘网。
  9. 根据权利要求8所述的防尘罩，其特征在于，所述从动杆包括分别与固定杆的两侧相连的第一从动杆和第二从动杆，所述第一从动杆和所述第二从动杆的一端分别与相邻所述固定部相连，所述第一从动杆和所述第二从动杆的另一端分别通过铰链相连接，所述第一从动杆和第二从动杆之间通过铰链实现相对运动。
  10. 根据权利要求9所述的防尘罩，其特征在于，所述压杆组件包括所述从动杆向内收缩的第一状态和所述从动杆向外扩张的第二状态，所述导向臂包括在第二状态时与所述固定部重合的第一导向臂和自所述第一导向臂弯折延伸的第二导向臂，所述第二导向臂通过所述滑轨推动所述从动杆。
  11. 根据权利要求10所述的防尘罩，其特征在于，所述第一导向臂上设置有锁定孔，所述固定杆上设置有与所述锁定孔对应的螺纹孔，当所述压杆组件处于第二状态时，通过穿过锁定孔的锁定螺钉实现压杆组件的锁定。
  12. 根据权利要求2所述的防尘罩，其特征在于，所述罩体的四角处设置有紧贴所述罩体内表面的密封条。
  13.  一种散热装置，其特征在于，包括散热风扇、以及如权利要求1至12中任一项所述的防尘罩。
  14. 根据权利要求13所述的散热装置，其特征在于，所述防尘罩包括磁铁，所述散热风扇的框架设有与所述磁铁相吸的金属或磁性部件。
     
     
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