AQS汽车外空气质量传感器应用指南

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1、e2vtechnologiesAPPLICATIONNOTEAutomotiveAirQualitySensorsUsingMiCSAirQualitySensorsThisapplicationnotedescribestheappropriateintegrationofaMiCSAirQualitySensorinamodernautomobile.MiCSistheAQSbrandofe2vtechnologies.Importantnote:Reproductionanddistributionofthisdocumentisrestrictedbye2v.Thefollowing

2、specificationsaresubjecttochangetoaccommodatecontinuousimprovement.TheAQSfunctionTheAirQualitySensorisbasedontwosemiconductorgassensorsthatdetectpollutionpeaksinthetraffic.Itcalculatesan“AirQualitylevel”thatissenttotheCPUoftheHVAC.TheHVACcanthenopenandclosetherecirculationflapsoastominimizethepollu

3、tioninthecabin.ACONFIDENTIALPage1of11RevAe2vtechnologiesAPPLICATIONNOTELocationinvehicleTheAQSmodulemustbeexposedtoasourceofexternalairatalltimes.Thelocationmustbechosensoastomaximizeairrenewal;deadspacesmustbeavoided.ThebestlocationisintheairintakeBEFORE(upstream)thefilter.Whentheflapisclosed,itca

4、ncreatea“pocket”ofstagnantair;forthatreason,theAQSmoduleshouldnotbetoo“deepintheduct”.Preferably,thefilteringmembraneshouldbefacingdownward.Ifthisisnotpossible,itshouldbevertical,butshouldneverbefacingupward,topreventaccumulationofdustIftheAQSmoduleisattachedwithabayonettotheairintakewallwithitsbod

5、y“inthecabin”,thefixationshouldbesufficientlyairtightsothatnoairfromthecabinispulledinfrontofthesensorhead.ExampleofintegrationinaHVACunit:TheAQSislocatedintheairinlethousingoftheHVACunit,beforetheairinletdoor.HVACunitAirinletwithoutAQSAirinletwithAQSDetailedviewCONFIDENTIALPage2of11RevAe2vtechnolo

6、giesAPPLICATIONNOTEOtherintegrationexample:frontgridTheAQSislocatedbehindthefrontgridofthecar,protectedfromdirectwater/mudprojectionsOtherintegrationexample:waterseparationboxTheAQSislocatedundertheplastichoodofthecowl(waterseparationbox),exposedtotheairflowtotheHVACunit.CONFIDENTIALPage3of11RevAe2

7、vtechnologiesAPPLICATIONNOTEMechanicalinterface:Firstpossibility:bayonetattachmentSecondpossibility:attachmentwithplasticsnap-inclipCONFIDENTIALPage4of11RevAe2vtechnologiesAPPLICATIONNOTEElectricalintegrati