WO2010051692A1 - 一种洁净室 - Google Patents

一种洁净室 Download PDF

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Publication number
WO2010051692A1
WO2010051692A1 PCT/CN2009/070513 CN2009070513W WO2010051692A1 WO 2010051692 A1 WO2010051692 A1 WO 2010051692A1 CN 2009070513 W CN2009070513 W CN 2009070513W WO 2010051692 A1 WO2010051692 A1 WO 2010051692A1
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WO
WIPO (PCT)
Prior art keywords
clean room
wall
door
window
shield
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Application number
PCT/CN2009/070513
Other languages
English (en)
French (fr)
Inventor
姜伟康
耿佐力
邴绍同
Original Assignee
江苏苏净科技有限公司
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Application filed by 江苏苏净科技有限公司 filed Critical 江苏苏净科技有限公司
Publication of WO2010051692A1 publication Critical patent/WO2010051692A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L1/00Enclosures; Chambers
    • B01L1/04Dust-free rooms or enclosures
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0001Rooms or chambers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/02Adapting objects or devices to another
    • B01L2200/028Modular arrangements

Definitions

  • the invention relates to a clean room which simultaneously has the function of an electromagnetic shielding room. Background technique
  • the basic technical principle of electromagnetic shielding is: a method of sealing the electromagnetic interference source with a metal shielding material to make the external electromagnetic field strength lower than the allowable value; or sealing the electromagnetic sensitive circuit with a metal shielding material to make the internal electromagnetic field strength A measure below the allowable value.
  • the construction of clean room and shielded room belongs to different technical fields.
  • the traditional electromagnetic shielding room is especially the steel plate type shield structure of steel frame with thick wall structure, which is thick and thick, difficult to construct, long in construction period and high in cost.
  • To create a clean environment in this shielded environment the cost and construction difficulty is conceivable.
  • To put it another way it is difficult to establish a separate shielded room in a clean room. This is because the processing of various pipes, filters, joints, etc. in the clean room has special requirements and is usually not met.
  • the shielding continuity required for the shielded room makes it difficult to achieve the shielding function. Summary of the invention
  • a clean room comprising: a wall enclosing the clean room, a door and a pipe opening on the wall.
  • the wall includes at least one continuous metal shielded housing.
  • the door includes at least one continuous third shield, the entire boundary of the third shield being in electrically conductive contact with the shield housing when the door is closed.
  • a cut-off waveguide window is provided in the duct, which completely covers the pipeline section of the pipeline, and the entire loop boundary of the cut-off waveguide window is in electrically conductive contact with the shield shell.
  • the present invention has the following advantages:
  • the metal sheet which belongs to the general wall material in the field of clean room construction is selected as the main material for constructing the shield shell. It can be made only by conducting and sealing the joints of the wall and the mounting structure of each component.
  • the clean room wall itself acts to shield electromagnetic waves.
  • the cost of wall materials selected for this method is much lower than the cost of materials required to build a traditional electromagnetic shielded room.
  • the clean room plays the role of a shielded room while being sealed and cleansed. It is no longer necessary to build another shielded room inside or outside the clean room.
  • the construction cost is also greatly reduced, and the construction difficulty is greatly reduced.
  • a preferred technical solution for use in the present invention is as follows: a filter is installed in the wall of the clean room, and the clean room further includes: a wire and a cable passing through the shield case via the filter .
  • the clean room further comprises a window embedded in the wall or the door, the window comprising at least one transparent window panel and at least one metal mesh completely covering the window panel, the whole of the metal mesh
  • the strip boundaries are each in electrically conductive contact with the shield housing or the third shield.
  • the shielding shell comprises a plurality of color steel plates spliced to each other, and the entire boundary of each of the color steel plates is in electrically conductive contact with another color steel plate adjacent to the color steel plate.
  • the adjacent color steel plates are fixedly connected by seamless continuous welding.
  • the wall comprises a side wall and a ceiling, and the side wall and the ceiling are fixedly connected by a steel seat having a U-shaped groove, and the steel seat is fixed on the ceiling in a seamless continuous welding manner. The entire upper edge of the side wall of the side wall is fully inserted into the Inside the u-shaped slot.
  • the wall body comprises a ceiling and a floor, and the side wall and the floor are fixedly connected by a steel seat having a u-shaped groove, and the steel seat is fixed on the floor by seamless continuous welding.
  • the entire lower edge of the side wall of the side wall is fully inserted into the u-shaped groove.
  • a conductive sealant is filled between the U-shaped groove and the sidewall.
  • the edge of the floor is bent upward to form a right angle flange, and the steel seat is fixed to the inner side of the flange.
  • the shield housing is grounded.
  • Figure 1 is a schematic view showing the structure of the present invention
  • Figure 2 is a schematic view showing the connection structure of the ceiling and the side wall
  • Figure 3 is a schematic view showing the connection structure of the floor and the side wall
  • Figure 4 is a front elevational view of the door with a window
  • Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
  • Figure 6 is an enlarged schematic view of a portion B of Figure 5;
  • Figure 7 is an enlarged schematic view of a portion C of Figure 5;
  • Figure 9 is a schematic view showing the connection structure of the electric wire and the side wall.
  • the core of the invention is to combine the construction of the clean room and the shielded room, so that the closed structure of the clean room can meet the cleaning requirements and meet the shielding requirements.
  • the wall 1 of the clean room is composed of four side walls 3, a ceiling 2 and a floor 4.
  • the material for manufacturing the ceiling 2 and the side wall 3 is a metal wall plate for a clean room, and the structure is a galvanized steel sheet having good electrical conductivity on both inner and outer surfaces, that is, a color steel plate 5, and a load-bearing material is filled in the middle.
  • the adjacent color steel plates 5 are continuously and electrically connected to each other, and the joints are uninterrupted, thereby forming a complete shielded casing in the entire wall 1.
  • the joints between the various color steel plates 5 in the same plane are coated with a conductive sealant, and are connected by a medium-conducting aluminum with good electrical conductivity, and are added at regular intervals. Press a positioning nail.
  • connection structure between the side wall 3 and the ceiling 2 is as shown in Fig. 2, and the crucible is fixedly connected by a steel seat 90 having an F shape.
  • the steel seat 90 is provided with a U-shaped groove 91, the side wall 3 is inserted into the U-shaped groove 91, and is continuously welded and fixed by soldering, and then the side of the F-shaped steel seat 90 facing away from the U-shaped groove 91 is continuously Soldering on the ceiling 2 achieves a continuous seamless electrically conductive connection between the side wall 3 and the ceiling 2.
  • the connecting structure between the side wall 3 and the floor 4 is as shown in FIG. 3, and the U-shaped steel seat 90 is fixedly connected, and the conductive gel is poured into the U-shaped groove 91 of the steel seat 90, and then the side wall is filled. 3 Insert into the U-shaped groove 91 and fix it inside.
  • the edge of the floor 4 is bent upward to form a right angle flange 93 of about 20 mm high, and the steel seat 90 The inner side of the flange 93 is in close contact with and continuously welded to the side, thereby achieving a continuous conductive connection between the side wall 3 and the floor 4.
  • the sealant and sealing gasket used in the above connection structure are all selected from the special wide RR clean room door 6, the air supply port 7, the observation window 8, the water pipe 9 and the like, which are modular in design. After the specifications are manufactured, they are mounted to the wall 1 according to a certain mounting structure. 4 and 5 are structural views of the door 6 provided with the observation window 8. The detailed mounting structure between the door 6 and the wall 1 is as shown in FIG. 6.
  • This door 6 is composed of a door frame 10 and a door leaf 20, and the door frame 10 and the door leaf 20 are hinged by a hinge 14, so that the door leaf 20 can be opened and closed.
  • the remaining surfaces of the door 20 are kept flat to minimize dust spots.
  • the door frame 10 and the door leaf 20 are each formed by seamlessly welding a steel plate, whereby a second shield body 1 1 is formed on the door frame 10, and a third shield body 21 is formed on the door leaf.
  • a second shield body 1 1 is formed on the door frame 10
  • a third shield body 21 is formed on the door leaf.
  • the surface of the steel plate is painted or sprayed, or the painted steel plate or stainless steel plate is attached for clean decoration.
  • the second shielding body 11 is a closed band shape surrounding the entire door, and the outer boundary thereof is seamlessly welded with the color steel plate 5 on the side wall 3 as a shielding case, so that the door frame 10 and the shielding case are completely electrically conductive, Will leave a gap in insulation.
  • a double seal is applied between the door frame 10 and the door leaf 20.
  • the first layer of sealing is achieved with a seal 15 sandwiched therebetween.
  • One side of the seal ring 15 is fixed to the door leaf 20 to continuously surround the door leaf 20-week. When the door is closed, the other side of the seal ring 15 is continuously attached to the door frame 10 without leaving a gap.
  • the second layer of sealing is implemented as follows: A decorative panel 40 is fixed on the surface of the door frame 10 facing the interior, the decorative panel 40 completely covering the inner surface of the door frame 10, and simultaneously covering the color steel plate 5 and the door leaf 20 portion. A pair of gaskets 41 are fixed to the surface of the decorative panel 40 facing the door frame 10. The pair of gaskets 41 surround the entire door frame 10 - circumference, and the other side surface thereof is continuously attached to the color steel plate 5 and the door leaf 20 when closed, without leaving a gap.
  • the decorative panel 40 is fixed to the door frame 10 by a stainless steel self-tapping screw 42.
  • the screw 42 is a grub screw.
  • the flat head surface is lower than the surface of the decorative panel 40, and a stainless steel decorative sheet 43 is attached in the recess.
  • the surface of the entire decorative panel 40 is flat without recesses, and the cleaning function is better realized.
  • a small amount of silica gel is applied at the joint between the decorative panel 40 and the color steel plate 5 to achieve a better seal.
  • the surface of the door leaf 20, the door frame 10, and the side wall 3 which are double-sealed after being double-faced is substantially in the same plane, so that the entire surface is flat without dust, which satisfies the requirements of the clean room.
  • the shielding function between the door frame 10 and the door leaf 20 is also achieved by a double shield.
  • the first layer of shielding is achieved by conductive contact between the side wall faces of the door leaf 20 and the side wall faces of the door frame 10.
  • a ring of copper plates 13 is completely attached to the inwardly facing side walls of the door frame 10, and the copper plates 13 are seamlessly welded to the second shield body 11 so as to be in electrically non-interrupted contact with the second shield body 11.
  • a circular arc-shaped metal spring piece 22 is integrally fixed to the side wall of the door leaf 20, and the top of the spring piece 22 is arched upward and seamlessly conforms to the surface of the copper plate 13.
  • the spring piece 22 is slightly depressed when it comes into contact with the door frame 10, and at the same time acts to clamp the door leaf 20 when the door is closed, ensuring that the door leaf 20 can be firmly embedded in the door frame 10, so that the sealing reliability of the door is Improved.
  • the implementation of the second layer of shielding is relatively complicated.
  • a recess 16 is formed in the recess 16 .
  • the slot 16 is continuously formed around the entire door frame 10 and is formed by a pair of annular elastic metal sheets 17.
  • an annular metal insert 25 is protruded, which surrounds the entire door leaf. When the door is closed, the insert 25 is inserted into the slot 16, and the two side surfaces of the insert 25 are in uninterrupted contact with the inner wall of the slot 16, respectively, so that the second shield 1 1 and the third shield 21 are continuous. Conductive contact.
  • the metal piece 17 must be made of a metal that is very elastic, so that the socket 16 still has good elasticity after repeated opening and closing of the door, so that the door does not have an inaccessible gap after being closed.
  • the shielded wall and the clean wall must be matched, and a door is installed on each of the two walls to complete the shielding and cleaning.
  • the method has a complicated structure, and the reliability of the sealing is lowered, and the cost is also high.
  • efficient sealing and shielding can be achieved at the same time.
  • the door leaf 20, the door frame 10, and the shielding case 1 are seamlessly connected as a whole, which satisfies the requirement that the shielded room needs to be made of a closed casing by a conductor, and also satisfies the leak-free of the clean room. Cleanliness requirements.
  • FIG. 7 is a schematic view showing the mounting structure of the observation window 8 opened on the door 6.
  • the observation window 8 is composed of a metal window frame 60 and a plexiglass window panel 50, and the window frame 60 is embedded in the door leaf 20.
  • the window frame 60 is an annular metal frame, and the outer boundary thereof is welded with the door leaf 20 to ensure complete connection without interruption.
  • the window panel 50 has two layers covering the inner and outer sides of the opening surrounded by the window frame 60, respectively.
  • the inner boundary of the window frame 60 is convex toward the opening, so that an annular mounting surface 65 which can be attached to the window panel 50 is formed on both inner and outer sides of the observation window 8, and the window panel 50 is fixed to the mounting surface by screws 64. 65 on.
  • the metal mesh 52 is used to complete the shielding function of the window panel 50.
  • the metal mesh 52 is closely attached to the inner surface of the window panel 50, completely covers the window panel 50, and its entire loop edge is turned over to the outer surface of the window panel 50, thereby wrapping the entire loop edge of the window panel 50.
  • a double-sided tape is interposed between the edge of the metal mesh 52 and the inner and outer surfaces of the window panel 50 to temporarily fix it.
  • the metal ferrule 61 is a ring-shaped steel frame having a U-shaped cross section, and thus has a U-shaped groove whose notch faces the inner ring of the inner ring.
  • the size of the U-shaped groove just corresponds to the shape of the edge of the window panel 50, so that the edge of the window panel 50 wrapped with the metal mesh 52 can be completely embedded, so that the full-circle edge of the metal mesh 52 is uninterrupted with the groove wall. fit.
  • the entire ferrule 61 is placed on the annular mounting surface 65 to form a continuous, uninterrupted electrical contact with the mounting surface 65, thereby indirectly providing an uninterrupted connection between the metal mesh 52 and the sash 60, and thus the door leaf 20. Ground conductive connection.
  • a metal mesh gasket completely identical to the metal mesh 52 is interposed on the annular contact surface between the ferrule 61 and the mounting surface 65, thereby realizing a space between the ferrule 61 and the window frame 60. Shield double insurance.
  • the metal mesh 52 used in the above structure is a copper mesh dedicated for electromagnetic shielding, and different meshes can be selected depending on the requirements of the shielding level. The network with the highest transparency can be selected without affecting the shielding effect.
  • the sealing structure between the louver 50 and the sash 60 and the door leaf 20 is achieved by a decorative panel 70.
  • the panel 70 is annular and completely covers the outer surface of the seam between the window panel 50 and the door leaf 20.
  • the inner boundary is sealingly connected to the window panel 50, and the outer boundary is sealingly connected to the door leaf 20.
  • the outer surfaces of the inner and outer boundaries are smooth slopes to reduce dust collection points.
  • a sealing silicone 72 is applied at the seam between the panel 70 and the louver 50 and the door leaf 20 at the seam between the panel 70 and the louver 50 and the door leaf 20.
  • the inner and outer boundaries of the panel 70 are both bent toward the inner side of the panel 70, forming a first mounting surface 75 facing the outer surface of the window panel 50 and a second mounting surface 76 facing the outer surface of the door leaf 20, respectively.
  • a ring-shaped gasket 41 is interposed between the first mounting surface 75 and the outer surface of the window panel 50 to effect sealing.
  • the second mounting surface 76 closely fits the outer surface of the door leaf 20, and directly penetrates the screw 73 from the outer surface of the panel 70.
  • the screw 73 passes through the second mounting surface 75, the door leaf 20 and the window frame 60, Fixed connection. After the screw 73 passes through the panel 70, its upper surface will be slightly lower than the outer surface of the panel 70. Therefore, a small decorative piece 74 is attached to the upper surface of the screw 73 so that the outer surface of the entire panel 70 is flat without recesses, dust collection is avoided, and the leakage point is avoided.
  • the existing various shielding windows generally design their structures only from the perspective of shielding, and it is difficult to directly use them in a clean room. Therefore, if a commercially available shielding window is directly used in the clean room of the present invention, it must be modified. For example, a decorative panel 70 and a gasket 41 are added to achieve sealing, and the inner surface of the window panel 50 is adjusted as close as possible to the inner surface of the surrounding shield housing.
  • the ventilation system of the clean room is an important part of it. On the wall 1 of the clean room, a plurality of air supply ducts and exhaust ducts are provided.
  • the main body of the air supply port 7 is a case 30 embedded in the ceiling 2.
  • a filter device 33 is mounted inside the casing 30.
  • the mounting structure of the filter device 33 is the same as that of the filter device 33 of the ordinary clean room air outlet, and will not be described here.
  • the air inlet 31 of the casing 30 is connected to the air duct outside the clean room through the flange, and the diffuser plate is installed at the bottom of the air outlet 32.
  • the improvement of the present invention is that the cut-off waveguide window 35, which functions as an electromagnetic shield, is mounted inside the casing 30.
  • the outer casing of the casing 30 is bent and welded by a metal plate, and the inner boundary thereof is continuously welded integrally with the boundary of the cut-off waveguide window 35 without leaving a gap.
  • the cut-off waveguide window 35 is composed of a honeycomb panel whose waveguide cutoff frequency is greater than the frequency of the desired shield, thereby providing electromagnetic shielding.
  • the cut-off waveguide window 35 is mounted above the filter device 33, and a ring of gaskets 41 is tightly and seamlessly sandwiched between the two, so as to seal and clean, so that the addition of the cut-off waveguide window 35 does not affect the clean air supply port. Cleanliness.
  • the bottom of the casing 30 is turned outwardly by a fixed edge 45 which is attached to the lower surface of the ceiling 2.
  • the air supply opening 7 further includes an annular metal connecting frame 36 having an L-shaped cross section and having a first connecting surface and a second connecting surface at right angles to each other.
  • the first connecting surface is in close contact with the outer wall of the casing 30 and is welded by full welding.
  • the second connecting surface is in close contact with the upper surface of the ceiling 2, and is also welded by full welding, thereby achieving continuous conductive contact between the ceiling 2 and the casing 30, thereby making the ceiling 2 and the cut-off waveguide window 35 continuous.
  • Conductive connection A plurality of sets of bolts are provided through the second connecting face, the ceiling 2, the fixed side 45, and a fixed connection between the case 30 and the ceiling 2 is achieved by cooperation with the nut.
  • the weight of the entire air supply port 7 is not directly received by the point at which the bolt is fixed to the ceiling 2, but is indirectly fixed to the ceiling 2 through the connecting frame 36, so that the weight is dispersed.
  • a plurality of lifting rings 46 may be disposed at the top of the box body 30, and the ribs are pulled in the lifting ring 46, and the weight of the entire air blowing port 7 is dispersed to other load-bearing walls by the ribs, thereby further reducing The load bearing capacity of the ceiling 2 enhances the reliability of the seal.
  • the traditional double-walled shield shields the air supply opening in the clean room, and the cut-off waveguide window 35 is installed in the outer shield wall.
  • the clean filter device is disposed in the inner clean wall, and the connection between the two walls is wind.
  • the length of the tube is long, and the double-wall has a mounting gap, which increases the risk of leakage.
  • the cut-off waveguide window 35 is directly hermetically welded inside the casing 30, reducing the installation gap with the wall 1.
  • the cleaning performance of the entire air supply port 7 is further improved by providing the fixed side 45 and the connecting frame 36. In the case where liquid exchange is required inside and outside the clean room, it is also necessary to install a water pipe 9 passing through the wall 1.
  • the water pipe 9 is shielded in the same manner as the air supply port 7, and a cut-off waveguide 35 is added to the pipe cross section, and the cut-off waveguide window 35 is ring-welded to the shield case to achieve shielding.
  • all of the wires 81 and cables that are introduced into the clean room through the wall 1 must be filtered by the filter 80.
  • the effectiveness of the shield is measured by the effectiveness of the shield. Shielding effectiveness SE meets the following formula:
  • T the thickness of the shielding material, in cm

Description

一种洁净室 技术领域
本发明涉及一种洁净室, 该洁净室同时具备电磁屏蔽室的功能。 背景技术
电子工业的迅速发展使得各种各样的电子设备得到了广泛的普及和应用, 它们在方便人类工作的同时也释放出大量的电磁辐射。 大量的电磁辐射一方面 会危害人们的健康, 另一方面也会干扰其它电子产品内部微电流的控制信号, 使某些精密电子设备的操作系统出现失误或瘫痪。 此外, 电磁辐射的发散性还 给信息安全带来了隐患, 计算机等科研设备在工作时会通过电磁波将有用的信 息泄露出去, 导致信息泄密, 有可能造成政治、 经济、 国防等方面的重大损失。
另一方面, 随着微电子、 半导体、 精密机械等制作领域的技术不断升级, 对洁净室内的空气洁净要求不再仅仅满足于尘埃粒子、 细菌、 温度、 湿度、 压 力等参数达到要求, 还进一步对噪音、 振动、 高纯度水气、 静电辐射等方面的 洁净程度提出了更高的要求。 这就要求传统的洁净室具有屏蔽辐射的能力, 或 者需要令传统的屏蔽室同时具有洁净室的功能。
电磁屏蔽的基本技术原理是: 用金属屏蔽材料将电磁干扰源封闭起来, 使 其外部电磁场强度低于允许值的一种措施; 或用金属屏蔽材料将电磁敏感电路 封闭起来, 使其内部电磁场强度低于允许值的一种措施。
洁净室和屏蔽室建造属于不同的技术领域, 传统电磁屏蔽室尤其是目前常 见的土建厚墙配置钢框的钢板式屏蔽结构, 门厚墙厚, 施工难度大, 建造周期 长, 而且成本高。 若要在这种屏蔽环境中建立洁净环境, 其所需的费用以及建 造难度是可想而知的。 换个角度, 若要在洁净室中建立独立的屏蔽室, 其难度 同样很大, 这是因为洁净室内的各种管道、 过滤装置、 接缝等处的工艺处理具 有比较特殊的要求, 通常无法满足屏蔽室所要求的屏蔽连续性, 难以实现屏蔽 功能。 发明内容
本发明的目的在于提供一种同时具备电磁屏蔽室功能的洁净室。
本发明解决其技术问题所采用的技术方案是: 一种洁净室, 包含: 围成该洁净室的墙体、 开设在所述墙体上的门和管道。 所述墙体包含至少一连续的金属屏蔽壳体。 所述门包含至少一连续的第三屏蔽 体, 当所述门关闭时, 该第三屏蔽体的整条边界均与所述屏蔽壳体相能导电地 接触。 所述管道内设置有将该管道的管路截面完整覆盖住的截止波导窗, 该截 止波导窗的整圈边界均与所述屏蔽壳体相能导电地接触。
由于上述技术方案的运用, 本发明具有如下优点:
1、 选用在洁净室建造领域中属于通用墙体材料的金属板材作为建造屏蔽壳 体的主要材料, 仅通过对墙体接缝处以及各零部件的安装结构进行导电与密封 处理, 就能使洁净室墙体本身起到屏蔽电磁波的作用。 此法所选用的墙体材料 成本远低于建造传统电磁屏蔽室所需的材料成本。
2、 洁净室在起到密闭洁净作用的同时也起到了屏蔽室的作用, 无需再在洁 净室内部或外部建造另一层屏蔽室, 建造成本也大幅度降低, 同时大大降低了 施工难度。
3、 由于仅需一层墙体就能同时实现洁净与屏蔽, 因此安装在洁净室墙体内 的门、 窗、 送风口等重要零部件均可实现模块化制造。 将各零部件的尺寸进行 统一设计, 并在墙体上预留好合适的尺寸后, 就能通过预先规划好的安装方式, 在实现屏蔽与密封的前提下很方便的完成安装过程, 无须再在每个洁净室的建 造过程中单独设计这些固有模块。 不但降低了施工安装难度, 而且便于实现规 范化量产。
本发明所釆用的较为优选的技术方案如下: 在所述洁净室的墙体内安装有 滤波器, 所述洁净室还包含: 经由所述滤波器穿过所述屏蔽壳体的电线和电缆。
优选的, 所述洁净室还包含嵌在所述墙体或所述门内的窗, 该窗包含至少 一层透明窗板以及完整覆盖住所述窗板的至少一片金属网, 该金属网的整条边 界均与所述屏蔽壳体或所述第三屏蔽体相能导电地接触。
优选的, 所述屏蔽壳体包含相互拼接的多块彩钢板, 每块所述彩钢板的整 条边界均与和该彩钢板相邻接的另一块彩钢板相能导电地接触。 相邻接的所述 彩钢板之间以无缝连续焊接的方式相固定连接。 所述的墙体包含侧壁和天花板, 所述侧壁与所述天花板之间通过具备 U 形槽的钢座相固定连接, 所述钢座以无 缝连续焊接的方式固定在所述天花板上, 所述侧壁的整圈上边缘全部插入所述 的 u 形槽内。 所述的墙体包含天花板和地板, 所述侧壁与所述地板之间通过具 备 u 形槽的钢座相固定连接, 所述钢座以无缝连续焊接的方式固定在所述地板 上, 所述侧壁的整圈下边缘全部插入所述的 u形槽内。 所述 U形槽与所述侧壁 之间填充有导电密封胶。 所述地板的边缘朝上方弯折形成直角翻边, 所述钢座 固定在所述翻边的内侧。 所述的屏蔽壳体接地。 附图说明
附图 1为本发明的结构示意图;
附图 2为天花板与侧壁的连接结构示意图;
附图 3为地板与侧壁的连接结构示意图;
附图 4为带有窗的门的主视图;
附图 5为附图 4的 A-A向剖视图;
附图 6为附图 5的 B部位放大示意图;
附图 7为附图 5的 C部位放大示意图;
附图 8为送风口与天花板的连接结构示意图;
附图 9为电线与侧壁的连接结构示意图。
其中:
1、 墙体; 2、 天花板; 3、 侧壁; 4、 地板; 5、 彩钢板; 6、 门; 7、 送风口; 8、 观察窗; 9、 水管;
10、 门框; 1 1、 第二屏蔽体; 12、 侧壁面; 13、 铜板; 14、 铰链; 15、 密 封圈; 16、 插槽; 17、 金属片;
20、 门扇; 21、 第三屏蔽体; 22、 弹簧片; 23、 顶部表面; 24、 门把; 25、 插片;
30、 箱体; 31、 进风口; 32、 出风口; 33、 过滤装置; 35、 截止波导窗; 36; 连接框;
40、 装饰板; 41、 密封垫; 42、 螺钉; 43、 装饰片; 45、 固定边; 46、 吊 环;
50、 窗板; 52、 金属网;
60、 窗框; 61、 卡套; 64、 螺钉; 65、 安装面
70、 面板; 72、 硅胶; 73、 螺丝; 74、 装饰片; 75、 第一安装面; 76、 第 二安装面;
80、 滤波器; 81、 电线;
90、 钢座; 91、 U形槽; 92、 密封胶; 93、 翻边; 94、 锡焊。 具体实施方式
下面结合附图对本发明的具体实施方式进行说明:
本发明的核心在于, 将洁净室与屏蔽室的建造合二为一, 使得洁净室的密 闭结构既能满足洁净要求, 又能满足屏蔽要求。
如附图 1所示, 本洁净室的墙体 1 由四面侧壁 3、 天花板 2和地板 4构成。 制造天花板 2与侧壁 3 的材料为洁净室专用的金属壁板, 其结构为内外两 侧表面均为导电性良好的镀锌钢板, 即彩钢板 5, 中间填充承重材料。 各块相邻 的彩钢板 5相互连续导电地连接, 接缝处无间断, 从而在整个墙体 1 中构成了 一个完整的屏蔽壳体。 为了保证彩钢板 5 之间的连续导电, 在同一平面内的各 块彩钢板 5 之间的接缝处涂有导电密封胶, 并采用导电性能良好的中字铝穿心 连接, 每隔一定间距加按一个定位钢钉。
整个屏蔽室建造在符合承重强度和平整度等要求的水磨石地面上, 地板 4 采用多块 1 毫米厚的镀锌钢板平铺而成, 在相邻钢板间的接缝处采用锡焊或电 焊进行连续焊接, 高出部位磨平, 使整个地板 4 成为无缝隙的整体。 然后按一 定密度要求用钢钉将地板 4与地面固定成一体, 并从地板 4 的四角各引出一路 接地线, 形成多点接地模式。 若屏蔽室的占地面积很大, 比如为数百平方时, 可将接地线数量加倍。 将墙体 1 接地是为了进行静电屏蔽, 若只需进行电磁屏 蔽也可不接地, 但因用作电磁屏蔽的导体增加了静电耦合, 因此即使只进行电 磁屏蔽, 也还是接地为好, 这样电磁屏蔽也能同时起到静电屏蔽的作用。
侧壁 3与天花板 2之间的连接结构如附图 2所示, 釆用呈 F字形的钢座 90 相固定连接。 该钢座 90具备 U形槽 91, 将侧壁 3插入 U形槽 91 内, 并用焊锡 连续满焊焊死固定, 然后将 F字形钢座 90的与 U形槽 91相背离的一侧连续地 焊死在天花板 2上, 从而实现侧壁 3与天花板 2之间实现的连续无缝导电连接。
侧壁 3与地板 4之间的连接结构如附图 3所示, 采用 U字形的钢座 90相固 定连接, 在钢座 90的 U形槽 91 内灌入导电胶状体, 再将侧壁 3插入 U形槽 91 内固定。 地板 4的边缘处朝上方弯折形成约 20毫米高的直角翻边 93 , 钢座 90 与该翻边 93的内侧紧密贴合, 并与其相连续焊死, 从而实现侧壁 3与地板 4之 间的的连续导电连接。
在上述连接结构中所使用的密封胶、 密封胶垫均选用导电性能良好的专用 广 RR 洁净室内的门 6、 送风口 7、 观察窗 8、 水管 9等部件均采用模块化设计, 预先按照一定规格制造后, 按照一定的安装结构安装至墙体 1上。 附图 4和附图 5为设置有观察窗 8的门 6的结构示意图。 其中, 门 6与墙 体 1之间的详细安装结构如附图 6所示。 此门 6 由门框 10和门扇 20构成, 门 框 10与门扇 20之间通过铰链 14相铰接, 使门扇 20能够开闭。 门扇 20上除了 位于室内外两侧的一对门把 24之外, 其余表面保持平整, 以尽量减少积尘点。
门框 10和门扇 20均采用钢板无缝焊接折弯而成, 由此在门框 10上形成第 二屏蔽体 1 1 , 在门扇上形成第三屏蔽体 21。 制作完毕后, 在钢板表面实施烤漆 或喷塑处理, 或贴附烤漆钢板或不锈钢板进行洁净装饰。 第二屏蔽体 1 1为环绕 整个门的封闭带状, 其外边界与作为屏蔽壳体的侧壁 3上的彩钢板 5相无缝焊 接, 使得门框 10与屏蔽壳体之间完整导电, 不会留下绝缘的缝隙。
门框 10与门扇 20之间实施双层密封。 第一层密封利用夹在二者之间的密 封圈 15来实现。 该密封圈 15 的一侧固定在门扇 20上, 连续地环绕门扇 20— 周。 当门闭合时, 密封圈 15的另一侧与门框 10相连续贴合, 不留间隙。
第二层密封的实现方式如下: 在门框 10的面朝室内的表面上固定有装饰板 40, 该装饰板 40将门框 10的内表面完整覆盖, 并且同时覆盖住了彩钢板 5及 门扇 20的一部分。 在装饰板 40的面朝门框 10的表面上固定有一对密封垫 41。 这一对密封垫 41均环绕整个门框 10—周, 且其另一侧表面分别与彩钢板 5和 关闭时的门扇 20相连续贴合, 不留间隙。 装饰板 40是通过不锈钢自攻螺钉 42 固定在门框 10上的, 该螺钉 42为平头螺钉, 安装好后其平头面低于装饰板 40 的表面, 在该凹陷内贴附一块不锈钢的装饰片 43, 使得整个装饰板 40的表面平 整无凹陷, 更好的实现洁净功能。 同时, 在装饰板 40与彩钢板 5之间的连接处 涂敷少量硅胶, 实现更好的密封。 采用双层密封后的门扇 20、 门框 10、 侧壁 3三者的面朝室内的表面基本处 于同一平面上, 使得整个表面平整不积尘, 满足洁净室的要求。
门框 10与门扇 20之间的屏蔽功能同样采用了双层屏蔽来实现。
第一层屏蔽通过门扇 20 的侧壁面与门框 10 的侧壁面之间的导电接触来实 现。 在门框 10的朝内的侧壁上完整地贴覆了一圈铜板 13, 此铜板 13与第二屏 蔽体 1 1相无缝焊接, 从而与第二屏蔽体 11相无间断地导电接触。 在门扇 20的 侧壁上完整地固定有一圈弓状的金属弹簧片 22, 该弹簧片 22的顶部朝上拱起, 并与铜板 13的表面相无缝贴合。 另一方面, 弹簧片 22在与门框 10接触时被略 微压下, 同时起到了在关门时卡紧门扇 20 的作用, 保证门扇 20能牢固地嵌在 门框 10中, 使得门的密封可靠性有所提升。
第二层屏蔽的实现方式相对较为复杂。 在门框 10的面朝室外的一侧, 内凹 的开设有插槽 16, 该插槽 16连续地环绕整个门框 10开设, 是由一对环状的弹 性金属片 17构成的。 在门扇 20面朝室内的一侧, 凸出设置有一环状的金属插 片 25 , 该插片 25环绕整个门扇。 当门关闭时, 插片 25插入插槽 16 内, 插片 25的两侧表面分别与插槽 16 内壁相无间断地接触, 使得第二屏蔽体 1 1与第三 屏蔽体 21之间相连续导电的接触。 金属片 17必须用弹性很好的金属制成, 这 样才能保证门在反复开闭后, 插槽 16依然具有良好的弹性, 使得门在闭合后不 会出现无法接触的缝隙。
在传统的双层屏蔽洁净室中, 必须配合屏蔽墙体与洁净墙体, 在两层墙体 上各安装一扇门, 分别完成屏蔽与洁净的作用。 此方法结构复杂, 使得密闭的 可靠性下降, 成本也较高。 而通过本实施例中所设计的单层门结构, 就能同时 实现高效的密封与屏蔽。 当门关闭时, 门扇 20、 门框 10、 屏蔽壳体 1三者无缝 地连接成为一个整体, 既满足了屏蔽室需要用导体制成一个封闭壳体的要求, 也满足了洁净室的无泄漏洁净要求。 并且此密封和屏蔽结构均为双保险, 连接 可靠性相当高。 附图 7为开设在门 6上的观察窗 8的安装结构示意图。 观察窗 8 由金属窗 框 60、 有机玻璃窗板 50构成, 窗框 60嵌在门扇 20内。 窗框 60为一环形的金 属框,其外边界与门扇 20采用满焊焊接,从而保证二者之间的连接完整无间断。 窗板 50有两层, 分别覆盖在由窗框 60围成的敞口的内外两侧。 窗框 60的 内边界朝敞口凸出, 因此在观察窗 8的内外两侧均形成了能与窗板 50相贴合的 环状安装面 65, 窗板 50通过螺钉 64固定在该安装面 65上。
首先, 釆用金属网 52来完成窗板 50的屏蔽功能。 金属网 52紧密贴附在窗 板 50的内表面, 将窗板 50完整地覆盖住, 并且其整圈边缘均翻至窗板 50的外 表面, 从而将窗板 50的整圈边缘都包裹住。 在金属网 52的边缘与窗板 50的内 外表面之间均夹入双面胶, 起到临时固定的作用。
金属卡套 61为一断面形状呈 U字形的环状钢框, 因此具备槽口面朝自身环 内圈的 U形槽。 该 U形槽的大小刚好与窗板 50的边缘形状相对应, 因此能将包 裹有金属网 52的窗板 50边缘完整地嵌入, 使得金属网 52的整圈边缘均与槽壁 相无间断地贴合。 整个卡套 61贴放在环状的安装面 65上, 与安装面 65之间形 成了连续无间断地导电接触, 从而间接使得金属网 52 与窗框 60 , 进而与门扇 20之间实现无间断地导电连接。
为了进一步避免电磁泄露, 在卡套 61 与安装面 65之间的环状接触面上, 还夹有一层与金属网 52完全相同的金属网垫片, 从而实现卡套 61与窗框 60间 的屏蔽双保险。 上述结构中所采用的金属网 52为电磁屏蔽专用的铜网, 根据屏 蔽等级的要求不同, 可以选择不同的网。 在不影响屏蔽效果的前提下, 能够选 择透明度尽量高的网。
窗板 50与窗框 60及门扇 20之间的密封结构是通过一个装饰面板 70来实 现的。 该面板 70为环状, 且完整地覆盖在窗板 50与门扇 20之间接缝的外表面 上。 其内边界与窗板 50相密封地连接, 外边界与门扇 20相密封地连接。 内外 边界的外表面均为光滑的斜面, 从而减少集尘点。 在面板 70与窗板 50 以及与 门扇 20之间的接缝处, 均涂有密封硅胶 72。
面板 70的内边界与外边界均朝面板 70内侧折弯, 分别形成了与窗板 50的 外表面相面对的第一安装面 75以及与门扇 20的外表面相面对的第二安装面 76。 在第一安装面 75与窗板 50的外表面之间夹有一圈环状的密封垫 41, 从而实现 密封。 第二安装面 76与门扇 20的外表面相紧密贴合, 并且从面板 70的外表面 上直接穿入螺丝 73, 该螺丝 73穿过第二安装面 75、 门扇 20和窗框 60, 将三者 固定连接。 螺丝 73在穿过面板 70之后, 其上表面会略低于面板 70的外表面, 因此需在螺丝 73的上表面贴一小块装饰片 74, 使整个面板 70的外表面平整无 凹陷, 避免集尘, 并且起到避免出现泄漏点的作用。
现有的各种屏蔽窗一般是仅从屏蔽的角度来设计其结构的, 难以直接使用 在洁净室内。 因此若在本发明的洁净室中直接采用市售的屏蔽窗, 还须经过改 装。 比如增设装饰面板 70和密封垫 41 以实现密封, 并且尽量将窗板 50的内表 面调节至与周围屏蔽壳体的内表面相齐平。 洁净室的通风系统是其很重要的组成部分。 在洁净室的墙体 1 上, 设置有 多个送风口管道及排风口管道。 简单来说, 各类风管穿过屏蔽壳体时, 必须经 过截止波导窗 35 的过渡, 且截止波导窗 35与屏蔽壳体之间必须环焊, 以防电 磁波泄漏。 以下以送风口 7为例详述其安装结构。
如附图 8所示, 送风口 7的主体为一个嵌在天花板 2中的箱体 30。 在箱体 30 的内部安装有过滤装置 33。 此过滤装置 33 的安装结构与普通洁净室内送风 口的过滤装置 33的安装结构无异, 故在此不赘述。 箱体 30的进风口 31通过法 兰与洁净室外的风管相连接, 出风口 32的底部安装有散流板。 而本发明的改进 之处在于, 将起到电磁屏蔽作用的截止波导窗 35安装在箱体 30的内部。
箱体 30 的外壳采用金属板弯折焊接而成, 其内边界与截止波导窗 35 的边 界整体连续焊接在一起, 不留间隙。 截止波导窗 35是由蜂窝板构成的, 其波导 截止频率大于所需屏蔽的频率, 从而起到电磁屏蔽作用。
截止波导窗 35安装在过滤装置 33 的上方, 并在二者之间紧密无缝地夹设 有一圈密封垫 41, 起到密封洁净的作用, 从而使得增设截止波导窗 35不会影响 洁净送风口的洁净效能。
箱体 30的底部朝外侧翻出一圈固定边 45, 该固定边 45贴附在天花板 2的 下表面上。
本送风口 7还包括一个环状的金属连接框 36,该连接框 36的断面呈 L字形, 具备相互成直角的第一连接面和第二连接面。 其中, 第一连接面紧贴在箱体 30 的外壁上, 并通过满焊焊死。 第二连接面紧贴在天花板 2 的上表面上, 也通过 满焊焊死, 从而令天花板 2与箱体 30之间实现连续导电的接触, 进而使得天花 板 2与截止波导窗 35之间相连续导电的连接。 穿过第二连接面、 天花板 2、 固定边 45设置有多组螺栓, 并通过与螺母的 配合实现箱体 30与天花板 2之间的固定连接。
通过上述连接方式, 整个送风口 7 的重量不会直接由天花板 2上固定了螺 栓的点来承受, 而是通过连接框 36间接固定在天花板 2上, 使得重量分散。 如 附图 1所示, 在箱体 30的顶部还可以设置多个吊环 46, 在吊环 46中拉设拉筋, 通过拉筋将整个送风口 7 的重量分散至其他承重墙体上, 更加减轻了天花板 2 的承重负担, 增强了密封的可靠性。
整个箱体 30内所有的接缝处全部采用满焊连接, 且产品最终必须全部镀锌 或镀铜处理, 保证其屏蔽效能。
传统的双层墙体的屏蔽洁净室内的送风口, 其截止波导窗 35安装在外侧的 屏蔽墙体内, 洁净过滤装置设置在内层的洁净墙体内, 两层墙体之间的连接风 管长度较长, 双层墙体上均具有安装缝隙, 增大了泄漏风险。 本实施例中的送 风口 7中, 截止波导窗 35直接环焊在箱体 30的内部, 减少了与墙体 1之间的 安装缝隙。 同时, 通过设置固定边 45和连接框 36, 进一步完善了整个送风口 7 的洁净效能。 在需要在洁净室内外进行液体交换的场合,还需要安装穿过墙体 1的水管 9。 水管 9的屏蔽方式与送风口 7相同, 在管路截面上增设一截止波导管 35, 将该 截止波导窗 35与屏蔽壳体环焊连接, 即可实现屏蔽。 如附图 9所示, 所有穿过墙体 1引入洁净室内的电线 81与电缆, 都必须经 过滤波器 80进行过滤。 按照上述原则设计出具有屏蔽作用的洁净室后, 还需要对其屏蔽效率进行 计算与校核。 屏蔽体的有效性是用屏蔽效能来度量的。 屏蔽效能 SE满足如下公 式:
SE = A + R+ B
A= 1. 314*t (f* o r* r) 1/2
R= 168-101og ( r*f/ o r)
B = 201og { 1- [(Zm-Zw) I (Zm+Zw)] 210— ° 1A(cosO. 23A- jsinO. 23A) } 式中:
A——吸收损耗
R __反射损耗
B一一多次反射损耗
f——电磁波频率 Hz
σ r——相对电导率
τ——相对磁导率
t——屏蔽材料厚度, 单位 cm
Zm __屏蔽金属的电磁波阻抗
Zw——空气的电磁波阻抗
当 AMOdB时一般可以不计多次反射损耗。 所以屏蔽能效可以简化为: SE = A+R
参数按照 t=0.5mm, σ r=0.17, μ r= 1000代入估算,按 GB/T12190— 2006 推荐的屏蔽效能检验特征频率远场计算结果如表 1 所示, 可见按此结构设计的 洁净室其电磁屏蔽效果是相当好的, 完全能够作为标准屏蔽室来使用。
表 1: 不同频率下的远场屏蔽效能
Figure imgf000012_0001
如上所述, 我们完全按照本发明的宗旨进行了说明, 但本发明并非局限于 上述实施例和实施方法。 相关技术领域的从业者可在本发明的技术思想许可的 范围内进行不同的变化及实施。

Claims

权 利 要 求
1、 一种洁净室, 包含: 围成该洁净室的墙体 (1)、 开设在所述墙体 (1) 上的门 (6) 和管道, 其特征在于:
所述墙体 (1) 包含至少一连续的金属屏蔽壳体,
所述门 (6) 包含至少一连续的第三屏蔽体 (21), 当所述门 (6) 关闭时, 该第三屏蔽体 (21) 的整条边界均与所述屏蔽壳体相能导电地接触,
所述管道内设置有将该管道的管路截面完整覆盖住的截止波导窗 (35), 该 截止波导窗 (35) 的整圈边界均与所述屏蔽壳体相能导电地接触。
2、 根据权利要求 1所述的一种洁净室, 其特征在于: 在所述洁净室的墙体 (1) 内安装有滤波器 (80), 所述洁净室还包含: 经由所述滤波器 (80) 穿过 所述屏蔽壳体的电线 (81) 和电缆。
3、 根据权利要求 1所述的一种洁净室, 其特征在于: 所述洁净室还包含嵌 在所述墙体或所述门内的窗 (8), 该窗 (8) 包含至少一层透明窗板 (50) 以及 完整覆盖住所述窗板 (50) 的至少一片金属网 (52), 该金属网 (52) 的整条边 界均与所述屏蔽壳体或所述第三屏蔽体相能导电地接触。
4、 根据权利要求 1所述的一种洁净室, 其特征在于: 所述屏蔽壳体包含相 互拼接的多块彩钢板(5), 每块所述彩钢板(5)的整条边界均与和该彩钢板(5) 相邻接的另一块彩钢板 (5) 相能导电地接触。
5、 根据权利要求 4所述的一种洁净室, 其特征在于: 相邻接的所述彩钢板 (5) 之间以无缝连续焊接的方式相固定连接。
6、 根据权利要求 4 所述的一种洁净室, 其特征在于: 所述的墙体 (1) 包 含侧壁 (3) 和天花板 (2), 所述侧壁 (3) 与所述天花板 (2) 之间通过具备 U 形槽 (91) 的钢座 (90) 相固定连接, 所述钢座 (90) 以无缝连续焊接的方式 固定在所述天花板 (2) 上, 所述侧壁 (3) 的整圈上边缘全部插入所述的 U 形 槽 (91) 内。
7、 根据权利要求 4 所述的一种洁净室, 其特征在于: 所述的墙体 (1) 包 含天花板 (2) 和地板 (4), 所述侧壁 (3) 与所述地板 (4) 之间通过具备 U形 槽 (91) 的钢座 (90) 相固定连接, 所述钢座 (90) 以无缝连续焊接的方式固 定在所述地板(4)上, 所述侧壁(3)的整圈下边缘全部插入所述的 U形槽(91)
12
替换页(细则第 26条) 内。
8、 根据权利要求 6或 7所述的一种洁净室, 其特征在于: 所述 U形槽(91) 与所述侧壁 (3) 之间填充有导电密封胶 (92)。
9、 根据权利要求 7 所述的一种洁净室, 其特征在于: 所述地板 (4) 的边 缘朝上方弯折形成直角翻边 (93), 所述钢座 (90) 固定在所述翻边 (93) 的内 侧。
10、 根据权利要求 1 所述的一种洁净室, 其特征在于: 所述的屏蔽壳体接 地。
13
替换页(细则第 26条)
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