空氣采樣煙霧探測報警系統(tǒng)在回風(fēng)口配置取樣管路時的設(shè)計依據(jù)為何，筆者為大家做出解釋：
　　
　　參考文獻
　　
　　1.NFPA318Cleanroom
　　
　　2.NFPA72NationalFireAlarmCode
　　
　　3.FMLossPreventionDataSheets
　　
　　1-56Cleanrooms
　　
　　4.FMLossPreventionDataSheets
　　
　　7-7SemiconductorFabricationFacilities
　　
　　5.IRInformationIM.17.11Cleanrooms,IndustrialRiskInsurers
　　
　　NFPA318ProtectionofCleanrooms
　　
　　2-3.1AlistedorapprovedsamplingsmokedetectionsystemshallbeprovidedinTheclearnessrerunairstreamatapointbeforedilutionfrommake-upairoccurs.Thesystemshallhaveaminimumsensitivityof0.03percentperftobstruction.Thesystemshallbecapableofmonitoringparticlesto10micronsorless.Wherethesystemisofthelight-scatteringtype,itshallhaveaminimumsensitivityof.03percentperftobstruction;wherethesystemisofthecloudchambertype,itshallhaveaminimumsensitivityof50,000parcelspermillimeter.
　　
　　經(jīng)列出或驗證之空氣極早采樣系統(tǒng)應(yīng)裝置于無塵室中,回風(fēng)氣流在混合空氣稀釋空氣前之處,此系統(tǒng)應(yīng)至少有0.03%ft.obs(0.1%/m.obs)之靈敏度,并能偵測10微米或以下大小之煙霧粒子,此統(tǒng)若為散射光式,其最低靈敏度應(yīng)達0.03%/ft-obe;此為統(tǒng)若為云霧式,其最低靈敏度應(yīng)達50000particles/mm
　　
　　FMLossPreventionDataSheets7-7SemiconductorFabricationFacilities
　　
　　2.2.1CleanRoomAirHandlingSystem
　　
　　3.AnFMRCApprovedsmokedetectionsystemshouldbeprovidedwithinthemakeupairhandlerunitsorclosetothemdownstream.Thesmokedetectionsystemshouldbearrangedtoalarmataconstantlyattendedlocationandshutdownthemakeupairunitsuponalarmtopreventcontinuedintakeofcontaminatedmakeupair.
　　
　　4.AnFMRCApprovedairsamplingorlinearbeamsmokedetectionsystemshouldbeprovidedwithinthereturnairpath.Whenthefabricationareasmoke/contaminantcontrolsystemisintegratedwiththefabricationareaair-handlingsystem,thesedetectorsshouldbearrangedtoclosedampers(uponalarm)whichstoptheflowofrecirculatingairtothecleanroomandopendamperswhichdiverttheflowofsmoke/contaminantwithinthecleanroomtotheatmosphere.Inallcasesthesedetectorsshouldbearrangedtoalarmataconstantlyattendedlocation.
　　
　　IndustrialRiskInsures
　　
　　IM.17.11Cleanrooms
　　
　　AirHandlingSystem
　　
　　A.Automaticsmokedetectorsofthesamplingtypeshouldbeinstalledwhereconditionedairexitsthecleanroom.
　　
　　B.AutomaticsamplingtypesmokedetectorsshouldbeinstalledthroughouttheunderfloorareaofthecleanroominaccordancewiththerequirementsofNFPA72E.Thedetectorsystemsshouldalarmataconstantlyattendedlocation.
　　
　　C.SmokeremovalsystemsthatusetheHVACsystemforexhaustshouldbeequippedwithsmokedetectorsinreturnairductsarrangedtostoptherecirculationairfansanddivertallairtoexhaust.
　　
　　

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