Raws li National Fire Protection Association, muaj ntau dua 354,000 qhov hluav taws kub nyob hauv ib xyoos, tua ib nrab ntawm 2,600 tus neeg thiab raug mob ntau dua 11,000 tus neeg. Feem ntau qhov kev tuag ntawm hluav taws tshwm sim thaum hmo ntuj thaum tib neeg tsaug zog.
Lub luag haujlwm tseem ceeb ntawm qhov chaw zoo, lub tswb hluav taws xob zoo yog pom tseeb. Muaj ob hom tseem ceeb ntawmpa taws tswb -ionization thiab photoelectric. Paub txog qhov sib txawv ntawm ob tuaj yeem pab koj txiav txim siab zoo tshaj plaws txog kev ceeb toom pa taws los tiv thaiv koj lub tsev lossis kev lag luam.
Ionizationpa taws tswbs thiab photoelectric tswb cia siab rau cov txheej txheem sib txawv kom pom hluav taws:
Ionizationsmokalarms
Ionizationpa taws tswb yog ib tug heev complex tsim. Lawv muaj ob daim phiaj hluav taws xob thiab lub chamber ua los ntawm cov khoom siv hluav taws xob uas ionizes huab cua txav ntawm cov phiaj.
Cov hluav taws xob hluav taws xob hauv lub rooj tsavxwm nquag ntsuas cov ionization tam sim no tsim los ntawm tus qauv tsim.
Thaum muaj hluav taws kub, cov khoom siv hluav taws xob nkag mus rau hauv ionization chamber thiab rov sib tsoo thiab ua ke nrog ionized cua molecules, ua rau tus naj npawb ntawm ionized cua molecules txo qis tsis tu ncua.
Cov hluav taws xob circuits nyob rau hauv lub rooj tsavxwm paub qhov kev hloov pauv hauv lub chamber thiab, thaum lub sijhawm teem ua ntej tshaj, lub tswb tau tshwm sim.
Photoelectric pa taws tswb
Photoelectric pa taws tswb yog tsim los raws li cov pa taws los ntawm qhov hluav taws kub hloov qhov kev siv ntawm lub teeb hauv huab cua:
Lub teeb tawg: Feem ntau photoelectricCov pa luam yeeb ntes ua haujlwm ntawm lub hauv paus ntsiab lus ntawm lub teeb tawg. Lawv muaj lub teeb ci LED thiab lub teeb pom kev zoo. Lub teeb beam raug coj mus rau thaj chaw uas cov khoom siv photosensitive tsis tuaj yeem ntes tau. Txawm li cas los xij, thaum cov pa luam yeeb los ntawm hluav taws nkag mus rau hauv txoj kev ntawm lub teeb beam, lub beam hits cov pa taws thiab deflected mus rau hauv lub photosensitive caij, ua rau lub tswb.
Kev thaiv lub teeb: Lwm hom photoelectric tswb yog tsim nyob ib ncig ntawm lub teeb thaiv. Cov tswb no kuj muaj lub teeb ci thiab lub teeb pom kev zoo. Txawm li cas los xij, nyob rau hauv rooj plaub no, lub teeb beam raug xa ncaj qha mus rau lub caij. Thaum cov pa luam yeeb ib nrab thaiv lub teeb beam, cov zis ntawm cov khoom siv photosensitive hloov vim qhov txo qis hauv lub teeb. Qhov kev txo qis hauv lub teeb no yog kuaj pom los ntawm lub tswb ntsuas hluav taws xob thiab ua rau lub tswb nrov.
Lub tswb sib xyaw ua ke: Tsis tas li ntawd, muaj ntau lub tswb ua ke. Ntau qhov sib xyawpa taws tswb koom nrog ionization thiab photoelectric thev naus laus zis hauv kev cia siab ntawm kev nce lawv cov txiaj ntsig.
Lwm cov kev sib txuas ntxiv ntxiv cov sensors, xws li infrared, carbon monoxide, thiab cov cua sov sensors, los pab kom pom cov hluav taws kub tiag tiag thiab txo cov tswb tsis tseeb vim muaj tej yam xws li cov pa luam yeeb, da dej da dej, thiab lwm yam.
Qhov txawv tseem ceeb ntawm Ionization thiabPhotoelectric pa taws tswb
Ntau cov kev tshawb fawb tau ua los ntawm Underwriters Laboratories (UL), National Fire Protection Association (NFPA), thiab lwm tus los txiav txim siab qhov kev ua tau zoo ntawm ob hom tseem ceeb no.Cov pa luam yeeb ntes.
Cov txiaj ntsig ntawm cov kev tshawb fawb thiab kev sim no feem ntau qhia cov hauv qab no:
Photoelectric pa taws tswb teb rau cov hluav taws kub hnyiab sai dua li lub tswb ionization (15 mus rau 50 feeb sai dua). Cov hluav taws kub hnyiab txav qeeb dua tab sis tsim cov pa taws ntau tshaj plaws thiab yog qhov ua rau tuag taus ntau tshaj plaws hauv hluav taws hauv tsev.
Ionization pa taws ceeb toom feem ntau teb sai dua me ntsis (30-90 vib nas this) rau hluav taws kub ceev (qhov hluav taws kub qhov hluav taws kub ceev) dua li lub tswb hluav taws xob. NFPA lees paub qhov tsim tau zoophotoelectric tswb Feem ntau ua haujlwm tshaj ionization tswb nyob rau hauv txhua qhov teeb meem hluav taws, tsis hais hom thiab cov khoom siv.
Ionization tswb ua tsis tau tejyam muab sijhawm txaus khiav tawm ntau duaphotoelectric tswb thaum muaj hluav taws kub.
Ionization alarms ua rau 97% ntawm "nruab nrab tswb"—cuav tswb—thiab, raws li qhov tshwm sim, muaj feem ntau yuav ua rau neeg xiam oob khab ntau dua li lwm hom hluav taws xob tswb. NFPA lees paub qhov ntawdphotoelectric pa taws tswb muaj qhov txiaj ntsig zoo tshaj ionization tswb hauv lub tswb tsis tseeb rhiab heev.
Qhov twg pa taws tswb yog qhov zoo tshaj?
Feem ntau cov neeg tuag los ntawm hluav taws tsis yog los ntawm cov nplaim taws, tab sis los ntawm kev nqus pa, uas yog vim li cas feem ntau cov neeg tua hluav taws—ze li ob feem peb—tshwm sim thaum tib neeg tsaug zog.
Ua li no, nws yog qhov tseeb tias nws tseem ceeb heev uas yuav tsum muaj pa taws tswb uas muaj peev xwm sai thiab raug ntes hluav taws kub hnyiab, uas tsim cov pa taws ntau tshaj plaws. Hauv qeb no,photoelectric pa taws tswb kom meej meej outperform ionization tswb.
Tsis tas li ntawd, qhov sib txawv ntawm ionization thiabphotoelectric tswb Nyob rau hauv qhov hluav taws kub ceev tau ua pov thawj tias yog me me, thiab NFPA xaus lus tias qhov zoophotoelectric tswb tseem yuav ua tau zoo tshaj ionization tswb.
Thaum kawg, txij li lub tswb nrov tuaj yeem ua rau tib neeg xiam oob qhabCov pa luam yeeb ntes, ua rau lawv tsis muaj txiaj ntsig,photoelectric tswb kuj qhia tau qhov zoo dua hauv cheeb tsam no, tsis tshua muaj kev cuam tshuam rau lub tswb tsis tseeb thiab yog li tsis tshua muaj neeg xiam oob qhab.
Kom meej meej,photoelectric pa taws tswb yog qhov tseeb tshaj plaws, txhim khu kev qha, thiab yog li kev xaiv muaj kev nyab xeeb tshaj plaws, qhov kev txiav txim siab txhawb nqa los ntawm NFPA thiab cov qauv uas tseem tuaj yeem pom ntawm cov tuam txhab thiab cov koom haum kev nyab xeeb hluav taws.
Rau kev sib txuas lub tswb, tsis muaj qhov pom tseeb lossis qhov txiaj ntsig tseem ceeb. NFPA tau txiav txim siab tias qhov kev xeem ntsuas tsis tau ua pov thawj qhov yuav tsum tau rau nruab dual thev naus laus zis lossisphotoionization pa taws tswb, txawm hais tias tsis yog qhov tsim nyog yuav raug mob.
Txawm li cas los xij, National Fire Protection Association tau xaus lus tiasphotoelectric tswb nrog cov sensors ntxiv, xws li CO lossis cov ntsuas cua sov, ua kom pom kev tua hluav taws thiab txo cov tswb cuav ntau dua.
Post lub sij hawm: Aug-02-2024
