WO2020119036A1 - 一种具有防雨防尘和电磁屏蔽功能的通风装置 - Google Patents

一种具有防雨防尘和电磁屏蔽功能的通风装置 Download PDF

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Publication number
WO2020119036A1
WO2020119036A1 PCT/CN2019/089175 CN2019089175W WO2020119036A1 WO 2020119036 A1 WO2020119036 A1 WO 2020119036A1 CN 2019089175 W CN2019089175 W CN 2019089175W WO 2020119036 A1 WO2020119036 A1 WO 2020119036A1
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WIPO (PCT)
Prior art keywords
main body
component
rainproof
dustproof
electromagnetic shielding
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PCT/CN2019/089175
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English (en)
French (fr)
Inventor
冯基伟
武晓南
秦术
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贵州航天电子科技有限公司
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Priority to GB2101503.7A priority Critical patent/GB2588365B/en
Publication of WO2020119036A1 publication Critical patent/WO2020119036A1/zh

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    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/0041—Ventilation panels having provisions for screening
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/08—Louvre doors, windows or grilles
    • E06B7/084—Louvre doors, windows or grilles with rotatable lamellae
    • E06B7/086—Louvre doors, windows or grilles with rotatable lamellae interconnected for concurrent movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • 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
    • H05K7/20127—Natural convection
    • 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
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked

Definitions

  • the invention relates to a ventilation device with functions of rainproof, dustproof and electromagnetic shielding, belonging to the technical field of electromagnetic shielding.
  • the shielding facilities and electronic equipment are closed shells made of sheet metal, which are important structures to prevent high-energy electromagnetic waves from coupling inwards from the outside of the shielding facilities and electronic equipment or preventing electromagnetic waves from coupling from the inside of the shielding facilities and electronic equipment to the outside.
  • In order to ensure ventilation and air conditioning it is necessary to set up ventilation ducts or ventilation holes. Because these holes will produce serious electromagnetic wave coupling, greatly reducing the electromagnetic shielding effectiveness, it is necessary to install electromagnetic shielding ventilation devices that can both ventilate and attenuate electromagnetic waves on the ventilation ducts or ventilation holes.
  • the Chinese patent document with publication number CN201657590U discloses a multifunctional electromagnetic shielding ventilation device with dustproof and rainproof capabilities, which includes at least a straight hole type steel waveguide and an anti-inclination angle of 30°-60° Rain-shaped steel waveguide, conductive gasket, metal frame and stainless steel mesh; steel waveguide and straight-hole steel waveguide are fixed in the metal frame by surface contact with the same size, and the steel waveguide and the inner side of the metal frame are fixed by vacuum welding ; The stainless steel mesh and the metal frame are fastened with screws; the conductive gasket is attached to the contact portion of the mounting wall of the metal frame to form an overall seal; the ventilator has a certain ability of rain, dust and electromagnetic shielding.
  • the ventilation device has been maintained in a ventilated state, which is not conducive to adjusting the temperature of the room or the cabin, and its rain and dust resistance capabilities still need to be further improved.
  • the present invention provides a ventilation device with functions of rainproof, dustproof and electromagnetic shielding.
  • a ventilation device with functions of rainproof, dustproof and electromagnetic shielding includes a main body, a rainproof part, a dustproof part and an electromagnetic shielding part.
  • the main body is a closed hollow cavity, and the main body is provided with an air inlet and an air outlet.
  • the electromagnetic shielding member is provided on the side of the main body at the air outlet, the rainproof member is installed on the main body and forms a cavity with the main body, the cavity communicates with the inside of the main body through the air inlet, and the bottom of the cavity is provided
  • the rain-proof component is a rain-proof cover, and the size of the lower part of the cavity enclosed by the rain-proof cover and the main body is larger than that of the upper part.
  • the dustproof component is a composite sand control net.
  • the composite sand control net can isolate sand and dust particles with a diameter ⁇ 150 ⁇ m from the ventilation device.
  • the electromagnetic shielding component is an EMC shielding ventilation net, and the EMC shielding ventilation net is installed on the main body through a support plate.
  • the EMC shielding ventilation mesh is a honeycomb waveguide ventilation plate.
  • the cross section of the mesh opening of the waveguide ventilation plate is a regular hexagon with an inscribed circle diameter of 3.2 mm, and the depth of the mesh is 12.7 mm.
  • the rotating component is a louver.
  • the louver includes a louver frame and a plurality of blades arranged side by side on the louver frame.
  • the louver frame is installed on the air inlet side of the main body.
  • the middle of the blade is rotatably connected to the louver frame. Connected in series, the connecting rod is connected to the drive assembly.
  • the blade has an L-shaped cross section, and includes a working plate and a connecting plate provided on the working plate.
  • the middle of the working plate is rotatably connected to the louver frame, and the end of the connecting plate away from the working plate is rotatably connected to the connecting rod.
  • Two ends are provided on the working plate away from the connection plate, and a groove is provided on the end close to the connection plate, and the distance between the two projections matches the width of the notch.
  • the driving component is a stepping motor installed in the main body, and the output shaft of the stepping motor is connected to the connecting rod through a crank and a connecting rod.
  • the beneficial effect of the present invention is that the vent is located at the bottom of the cavity surrounded by the rain cover and the main body, and the area of the vent is large.
  • the amount of ventilation air per unit time is fixed, it is beneficial to reduce the wind speed at the vent and avoid rain. It is sucked into the ventilation device, so that the ventilation device has a good rainproof function; the composite sand prevention net can isolate the sand and dust particles with a diameter ⁇ 150 ⁇ m from the ventilation device, and has a good sand and dustproof function; according to needs, Control the opening and closing angle of the blades on the blinds, which is convenient for adjusting the temperature in the room or cabin, with strong practicability and high reliability.
  • FIG. 1 is a schematic view of the main structure of the present invention.
  • FIG. 2 is a schematic cross-sectional structural view of FIG. 1 along A-A;
  • FIG. 3 is a schematic diagram of the rear view structure of FIG. 1;
  • FIG. 4 is a schematic diagram of the structure of the blade of the present invention.
  • a ventilating device with rain, dust and electromagnetic shielding functions includes a main body 1, a rainproof component, a dustproof component, and an electromagnetic shielding component.
  • the main body 1 is airtight A hollow cavity, the air inlet 5 and the air outlet 13 are processed on the main body 1, the electromagnetic shielding component is installed on the side of the air outlet 13 on the main body 1, the rainproof component is installed on the main body 1 and surrounds the main body 1 A cavity, which communicates with the inside of the main body 1 through the air inlet 5, and the bottom of the cavity is formed with a vent 9 which communicates with the outside world, and the dustproof part is installed at the vent 9; inside the main body 1 A rotating part for opening and closing the air inlet 5 is installed.
  • the main body 1 When in use, the main body 1 can be cylindrical, rectangular, or other shapes.
  • the air inlet 5 is located opposite the air outlet 13 to facilitate air circulation.
  • the electromagnetic shielding component can be directly installed at the air outlet 13 or can be installed through the support plate 11 Outside the air outlet 13 and aligned with the air outlet 13, the dust-proof parts cover the entire vent 9, to prevent large dust particles from entering the ventilator, and the rotating part is used to open and close the air inlet 5, which is convenient for indoor or The temperature in the cabin is adjusted.
  • the rain-proof component is a rain-proof cover 3, and the size of the lower part of the cavity enclosed by the rain-proof cover 3 and the main body 1 is larger than that of the upper part.
  • the rain cover 3 is mainly used to realize the rainproof function of the ventilation device, and at the same time has a protective effect on the ventilation device; the lower size of the cavity enclosed by the rain cover 3 and the main body 1 is larger than the upper size, that is, the rain cover 3 is increased
  • the area of the bottom vent 9 is large when the amount of ventilation air per unit time is large, which is helpful to reduce the wind speed, effectively prevent rainwater from being drawn into the ventilator, and has a good rainproof function.
  • the dustproof component is a composite sand control net 10. Avoid large dust particles from entering the ventilation device.
  • the composite sand control net 10 can isolate sand and dust particles with a diameter ⁇ 150 ⁇ m from the ventilation device. With good sand and dust prevention functions, the composite sand control net 10 meets the requirements of GJB150.12A-2009.
  • the electromagnetic shielding component is an EMC shielding ventilation net 12 that is installed on the main body 1 through a support plate 11.
  • a flange is machined on the support plate 11 and the flange is connected to the main body 1 by screws.
  • the EMC shielding ventilation mesh 12 is a honeycomb waveguide ventilation plate.
  • the cross-section of the mesh opening of the waveguide ventilation plate is a regular hexagon with an inscribed circle diameter of 3.2 mm, and the depth of the mesh is 12.7 mm.
  • the relative conductivity and relative permeability of the honeycomb waveguide ventilation plate are relatively high. It is installed at the air outlet 13 and has an electromagnetic shielding capability of 60 dB.
  • the rotating component is a louver.
  • the louver includes a louver frame 14 and a plurality of blades 2 mounted side by side on the louver frame 14.
  • the louver frame 14 is mounted on the side of the air inlet 5 of the main body 1.
  • the middle of the blade 2 is in contact with the louver frame 14
  • the blades 2 are connected in series through a connecting rod 4 which is connected to the drive assembly.
  • the blades 2 are mounted on the louver frame 14 and connected by a hinge.
  • the blades 2 are connected by a connecting rod 4. When the blades 2 open or close the air inlet 5, the connecting rod 4 ensures that each blade 2 has the same opening and closing angle.
  • the blade 2 has an L-shaped cross section and includes a working plate 20 and a connecting plate 21 welded to the working plate 20.
  • the middle of the working plate 20 is rotatably connected to the louver frame 14.
  • the end of the connecting plate 21 away from the working plate 20 is The connecting rod 4 rotates and connects.
  • Two ends 200 on the working plate 20 far away from the connecting plate 21 are processed, and a groove 201 is formed on the end near the connecting plate 21, and the distance between the two bosses 200 matches the width of the notch 201.
  • the lengths of the boss 200, the groove 201, and the blade 2 are the same; when the louver closes the air inlet 5, the two bosses 200 on the upper blade 2 are embedded in the notch 201 on the lower blade 2, thereby sealing the inlet
  • the tuyere 5 is convenient for adjusting the temperature in the room or cabin.
  • the driving component is a stepping motor 6 installed in the main body 1, and the output shaft of the stepping motor 6 is connected to the connecting rod 4 through a crank 7 and a connecting rod 8.
  • the crank 7, the connecting rod 8 and the connecting rod 4 constitute a crank slider mechanism, and the stepping motor 6 drives the crank slider mechanism to control the connecting rod 4 to move up and down, thereby controlling the opening and closing angle of the blade 2.
  • the ventilating device with rainproof, dustproof and electromagnetic shielding functions according to the present invention has the following working principle:
  • the vent 9 is located at the bottom of the cavity enclosed by the rain cover 3 and the main body 1, And the area of the vent 9 is large.
  • the sand net 10 can isolate the sand particles with a diameter ⁇ 150 ⁇ m from the ventilation device, and has good sand and dust prevention functions; it can control the opening and closing angle of the blade 2 on the blinds according to the needs, which is convenient for the temperature of the room or the cabin Adjustment, strong practicability and high reliability.
  • the main body 1, the rain cover 3 and the support plate 11 are all made of aluminum plate, which has high structural strength and light weight.
  • the ventilating device with rainproof, dustproof and electromagnetic shielding functions described in the present invention is used as a comprehensive control cabin. Ventilation and heat dissipation device. Specifically, the ventilation device is installed at the air inlet of the integrated control cabin, the electromagnetic shielding component on the ventilation device and the main body 1 are embedded and installed on the outer wall of the integrated control cabin, and the mounting flange on the main body 1 is passed through the M3 ⁇ 12 pan head screws It is connected with the outer wall of the comprehensive control cabin, and after the installation of each component is completed, the rain cover 3 is installed on the main body 1.
  • a temperature sensor and a controller are installed in the comprehensive control cabin, and the temperature sensor and the stepping motor 6 are connected to the controller through a wire.
  • the temperature sensor senses that the temperature in the integrated control cabin is higher than the set value
  • the temperature sensor transmits a signal to the controller, and the controller sends an action command to the stepper motor 6, which drives the blade 2 to open, thereby realizing Heat dissipation;
  • the temperature sensor senses that the temperature in the integrated control cabin is lower than the set value, the blinds remain closed to avoid a large amount of hot air being lost outside the integrated control cabin through the ventilation device.
  • the ventilation device realizes automatic control, which is convenient for adjusting the temperature in the comprehensive control cabin, so that the components in the comprehensive control cabin can work normally within a reasonable temperature range.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Textile Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Air-Flow Control Members (AREA)

Abstract

本发明公开了一种具有防雨防尘和电磁屏蔽功能的通风装置，属于电磁屏蔽技术领域。该通风装置包括主体、防雨部件、防尘部件和电磁屏蔽部件，所述主体为密闭中空腔体，主体上设有进风口和出风口，所述电磁屏蔽部件设在主体上的出风口一侧，所述防雨部件安装在主体上并与主体围成一空腔，该空腔通过进风口与主体的内部连通，且该空腔的底部设有与外界连通的通风口，所述防尘部件安装在通风口处；所述主体内设有用于打开和封闭进风口的转动部件。本发明具备良好的防雨功能和防沙防尘功能；可根据需要，控制百叶窗上叶片的开合角度，方便对室内或舱内的温度进行调节，实用性强，可靠性高。

Description

一种具有防雨防尘和电磁屏蔽功能的通风装置 技术领域
本发明涉及一种具有防雨防尘和电磁屏蔽功能的通风装置，属于电磁屏蔽技术领域。
背景技术
屏蔽设施和电子设备是由板状金属制成的封闭壳体，是防止高能量电磁波从屏蔽设施和电子设备外部向内部耦合或防止电磁波从屏蔽设施和电子设备内部向外部耦合的重要结构。为了保证通风和空气的调节，则需要设置通风管道或通风孔。由于这些孔洞会产生严重的电磁波耦合，大大降低电磁屏蔽效能，则必须在通风管道或通风过孔上加装既能通风又能对电磁波进行衰减的电磁屏蔽通风装置。为此，公开号为CN201657590U的中国专利文献，公开了一种具有防尘防雨能力的多功能电磁屏蔽通风装置，它至少包括直孔型钢制波导、倾斜角度在30°～60°的防雨型钢制波导、导电衬垫、金属边框及不锈钢网；钢制波导、直孔型钢制波导以同尺寸大小面接触固定在金属边框内，钢制波导与金属边框内侧四周采用真空焊接固定；不锈钢网与金属边框用螺钉紧固连接；在金属边框的安装壁面接触的部位贴接导电衬垫形成整体密封；该通风装置具有一定的防雨防尘和电磁屏蔽能力。但是，该通风装置一直保持通风状态，不利于对室内或舱内的温度进行调节，其防雨防尘能力仍有待进一步提高。
发明内容
为解决上述技术问题，本发明提供了一种具有防雨防尘和电磁屏蔽功能的通风装置。
本发明通过以下技术方案得以实现：
一种具有防雨防尘和电磁屏蔽功能的通风装置，包括主体、防雨部件、防尘部件和电磁屏蔽部件，所述主体为密闭中空腔体，主体上设有进风口和出风口，所述电磁屏蔽部件设在主体上的出风口一侧，所述防雨部件安装在主体上并与主体围成一空腔，该空腔通过进风口与主体的内部连通，且该空腔的底部设有与外界连通的通风口，所述防尘部件安装在通风口处；所述主体内设有用于打开和封闭进风口的转动部件。
所述防雨部件为防雨罩，该防雨罩与主体所围成空腔的下部尺寸大于上部尺寸。
所述防尘部件为复合防沙网。
所述复合防沙网能够将直径≥150μm的沙尘颗粒隔绝在通风装置外。
所述电磁屏蔽部件为EMC屏蔽通风网，该EMC屏蔽通风网通过支撑板安装在主体上。
所述EMC屏蔽通风网为蜂窝式的波导通风板，波导通风板上网孔的横截面为内接圆直径φ3.2mm的正六边形，网孔的深度为12.7mm。
所述转动部件为百叶窗，该百叶窗包括百叶窗框架和多块并排设置在百叶窗框架上的叶片，百叶窗框架安装在主体上的进风口一侧，叶片的中部与百叶窗框架转动连接，各叶片通过连接杆串联在一起，该连接杆与驱动组件连接。
所述叶片的横截面为L形，包括工作板和设置在工作板上的连接板，工作板的中部与百叶窗框架转动连接，连接板上远离工作板的一端与连接杆转动连接。
所述工作板上远离连接板的一端设有两凸台，靠近连接板的一端设有凹槽，且两凸台的距离与槽口的宽度相匹配。
所述驱动组件为安装在主体内的步进电机，该步进电机的输出轴 通过曲柄和连杆与连接杆连接。
本发明的有益效果在于：通风口位于防雨罩与主体所围空腔的底部，且通风口的面积大，当单位时间内通风风量一定时，有利于减小通风口处的风速，避免雨水被吸入至通风装置内，从而使通风装置具备良好的防雨功能；复合防沙网能够将直径≥150μm的沙尘颗粒隔绝在通风装置外，具备良好的防沙防尘功能；可根据需要，控制百叶窗上叶片的开合角度，方便对室内或舱内的温度进行调节，实用性强，可靠性高。
附图说明
图1为本发明的主视结构示意图；
图2为图1沿A-A的剖视结构示意图；
图3为图1的后视结构示意图；
图4为本发明的叶片的结构示意图。
图中：1-主体，2-叶片，20-工作板，200-凸台，201-凹槽，21-连接板，3-防雨罩，4-连接杆，5-进风口，6-步进电机，7-曲柄，8-连杆，9-通风口，10-复合防沙网，11-支撑板，12-EMC屏蔽通风网，13-出风口，14-百叶窗框架。
具体实施方式
下面结合实施例中的附图进一步描述本发明的技术方案，但要求保护的范围并不局限于所述。
如图1至图4示，本发明所述的一种具有防雨防尘和电磁屏蔽功能的通风装置，包括主体1、防雨部件、防尘部件和电磁屏蔽部件，所述主体1为密闭中空腔体，主体1上加工有进风口5和出风口13，所述电磁屏蔽部件安装在主体1上的出风口13一侧，所述防雨部件安装在主体1上并与主体1围成一空腔，该空腔通过进风口5与主体1的内部连 通，且该空腔的底部加工有与外界连通的通风口9，所述防尘部件安装在通风口9处；所述主体1内安装有用于打开和封闭进风口5的转动部件。在使用时，主体1可以是圆柱状、长方体状或其他形状，进风口5位于出风口13的对面，方便空气流通，电磁屏蔽部件可以直接安装在出风口13处，也可以通过支撑板11安装在出风口13外，并与出风口13对正，防尘部件覆盖整个通风口9，避免较大的粉尘颗粒进入到通风装置内，转动部件用于打开和封闭进风口5，方便对室内或舱内的温度进行调节。
所述防雨部件为防雨罩3，该防雨罩3与主体1所围成空腔的下部尺寸大于上部尺寸。防雨罩3主要用于实现通风装置的防雨功能，同时对通风装置具有保护作用；防雨罩3与主体1所围成空腔的下部尺寸大于上部尺寸，即增大了防雨罩3底部通风口9的面积，当单位时间内通风风量一定时，通风口9面积大，有利于减小风速，有效避免雨水被吸入到通风装置内，具有良好的防雨功能。
所述防尘部件为复合防沙网10。避免较大的粉尘颗粒进入到通风装置内。
所述复合防沙网10能够将直径≥150μm的沙尘颗粒隔绝在通风装置外。具有良好的防沙防尘功能，复合防沙网10满足GJB150.12A-2009的要求。
所述电磁屏蔽部件为EMC屏蔽通风网12，该EMC屏蔽通风网12通过支撑板11安装在主体1上。支撑板11上加工有法兰，该法兰通过螺钉与主体1连接。
所述EMC屏蔽通风网12为蜂窝式的波导通风板，波导通风板上网孔的横截面为内接圆直径φ3.2mm的正六边形，网孔的深度为12.7mm。蜂窝式的波导通风板的相对电导率和相对磁导率较高，其安装在出风口13处，具备60dB的电磁屏蔽能力。
所述转动部件为百叶窗，该百叶窗包括百叶窗框架14和多块并排 安装在百叶窗框架14上的叶片2，百叶窗框架14安装在主体1上的进风口5一侧，叶片2的中部与百叶窗框架14动连接，各叶片2通过连接杆4串联在一起，该连接杆4与驱动组件连接。在使用时，叶片2安装在百叶窗框架14上，用铰链连接，叶片2之间通过连接杆4连接，叶片2打开或封闭进风口5时，通过连接杆4保证各叶片2具有相同的开合角度。
所述叶片2的横截面为L形，包括工作板20和焊接在工作板20上的连接板21，工作板20的中部与百叶窗框架14转动连接，连接板21上远离工作板20的一端与连接杆4转动连接。
所述工作板20上远离连接板21的一端加工有两凸台200，靠近连接板21的一端加工有凹槽201，且两凸台200的距离与槽口201的宽度相匹配。在使用时，凸台200、凹槽201和叶片2的长度一致；当百叶窗封闭进风口5时，上方叶片2上的两凸台200嵌入到下方叶片2上的槽口201内，从而密封进风口5，方便对室内或舱内的温度进行调节。
所述驱动组件为安装在主体1内的步进电机6，该步进电机6的输出轴通过曲柄7和连杆8与连接杆4连接。曲柄7、连杆8和连接杆4组成曲柄滑块机构，步进电机6驱动该曲柄滑块机构控制连接杆4上下移动，从而控制叶片2的开合角度。
本发明所述的一种具有防雨防尘和电磁屏蔽功能的通风装置，其工作原理如下：
叶片2打开时，外界空气依次经复合防沙网10、百页窗、主体1和电磁屏蔽部件进入到舱内或室内；通风口9位于防雨罩3与主体1所围空腔的底部，且通风口9的面积大，当单位时间内通风风量一定时，有利于减小通风口9处的风速，避免雨水被吸入至通风装置内，从而使通风装置具备良好的防雨功能；复合防沙网10能够将直径≥150μm的沙尘颗粒隔绝在通风装置外，具备良好的防沙防尘功能；可根据需要，控制百叶窗上叶片2的开合角度，方便对室内或舱内的温度进行调节，实用性强，可靠性高。
主体1、防雨罩3和支撑板11均采用铝板制成，结构强度大，重量轻。
实施例一：
随着我国国防力量的不断增强，国防系统需进行全域作战，为满足地面保障设备的正常工作，将本发明所述的一种具有防雨防尘和电磁屏蔽功能的通风装置作为综控舱的通风散热装置。具体的，将通风装置安装在综控舱的进风口处，通风装置上的电磁屏蔽部件和主体1嵌入安装到综控舱的外壁，主体1上的安装法兰通过M3×12的盘头螺钉与综控舱外壁连接，待各部件安装完毕后，将防雨罩3安装在主体1上。此外，综控舱内安装有温度传感器和控制器，温度传感器和步进电机6均通过电线与控制器连接。当温度传感器感应到综控舱内的温度高于设定值时，温度传感器将信号传递给控制器，控制器将动作指令发送给步进电机6，步进电机6驱使叶片2打开，从而实现散热；当温度传感器感应到综控舱内的温度低于设定值时，百叶窗保持关闭状态，避免热空气经通风装置大量流失到综控舱外。通风装置实现自动控制，方便调节综控舱内的温度，从而使综控舱内的元器件在合理的温度范围内正常工作。

Claims (10)

  1. 一种具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：包括主体(1)、防雨部件、防尘部件和电磁屏蔽部件，所述主体(1)为密闭中空腔体，主体(1)上设有进风口(5)和出风口(13)，所述电磁屏蔽部件设在主体(1)上的出风口(13)一侧，所述防雨部件安装在主体(1)上并与主体(1)围成一空腔，该空腔通过进风口(5)与主体(1)的内部连通，且该空腔的底部设有与外界连通的通风口(9)，所述防尘部件安装在通风口(9)处；所述主体(1)内设有用于打开和封闭进风口(5)的转动部件。
  2. 如权利要求1所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述防雨部件为防雨罩(3)，该防雨罩(3)与主体(1)所围成空腔的下部尺寸大于上部尺寸。
  3. 如权利要求1所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述防尘部件为复合防沙网(10)。
  4. 如权利要求3所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述复合防沙网(10)能够将直径≥150μm的沙尘颗粒隔绝在通风装置外。
  5. 如权利要求1所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述电磁屏蔽部件为EMC屏蔽通风网(12)，该EMC屏蔽通风网(12)通过支撑板(11)安装在主体(1)上。
  6. 如权利要求5所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述EMC屏蔽通风网(12)为蜂窝式的波导通风板，波导通风板上网孔的横截面为内接圆直径φ3.2mm的正六边形，网孔的深度为12.7mm。
  7. 如权利要求1所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述转动部件为百叶窗，该百叶窗包括百叶窗框架(14) 和多块并排设置在百叶窗框架(14)上的叶片(2)，百叶窗框架(14)安装在主体(1)上的进风口(5)一侧，叶片(2)的中部与百叶窗框架(14)转动连接，各叶片(2)通过连接杆(4)串联在一起，该连接杆(4)与驱动组件连接。
  8. 如权利要求7所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述叶片(2)的横截面为L形，包括工作板(20)和设置在工作板(20)上的连接板(21)，工作板(20)的中部与百叶窗框架(14)转动连接，连接板(21)上远离工作板(20)的一端与连接杆(4)转动连接。
  9. 如权利要求8所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述工作板(20)上远离连接板(21)的一端设有两凸台(200)，靠近连接板(21)的一端设有凹槽(201)，且两凸台(200)的距离与槽口(201)的宽度相匹配。
  10. 如权利要求7所述的具有防雨防尘和电磁屏蔽功能的通风装置，其特征在于：所述驱动组件为安装在主体(1)内的步进电机(6)，该步进电机(6)的输出轴通过曲柄(7)和连杆(8)与连接杆(4)连接。
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