Analysis: Electronic Expansion Valve
Hauv kev lag luam tub yees thiab cua txias, kev nthuav dav li qub, plaub-txoj kev li qub, thiab nres li qub txhua tus ua lub luag haujlwm. Cov khoom no tsis tsuas yog cuam tshuam rau kev ua tau zoo thiab kev ntseeg tau ntawm lub kaw lus, tab sis kuj tseem yog cov ntsiab lus hauv kev paub txog kev siv tshuab tub yees siab heev. Kab lus no yuav ua qhov kev ntsuam xyuas qhov tob ntawm cov khoom no thiab sib tham txog lawv cov qauv, cov qauv kev ua haujlwm, kev ua yuam kev, thiab kev tshawb nrhiav thiab kev saib xyuas.
Electronic expansion valve
Lub tshuab hluav taws xob expansion valve kho cov kua ntim ntawm cov evaporator raws li qhov kev pab cuam preset. Nws yog hom kev hloov kho hluav taws xob, yog li nws yog hu ua hluav taws xob expansion valve.
Txoj kev tsav tsheb ntawm lub tshuab hluav taws xob nthuav dav yog tias tus maub los suav cov tsis tau sau los ntawm lub sensor thiab teeb meem kev hloov kho cov lus qhia rau lub rooj tsavxwm. Lub rooj tsavxwm tsav tawm cov teeb liab hluav taws xob rau lub tshuab hluav taws xob nthuav dav kom tsav lub tshuab hluav taws xob nthuav dav, raws li qhia hauv daim duab hauv qab no. Nws tsuas yog siv ob peb vib nas this rau lub tshuab hluav taws xob nthuav dav mus los ntawm kev kaw kom qhib tag nrho. Nws muaj cov tshuaj tiv thaiv sai thiab ua kom nrawm. Tsis muaj qhov tshwm sim zoo li qub superheat, thiab qhov qhib thiab kaw cov yam ntxwv thiab nrawm tuaj yeem teeb tsa kev tsim khoom. Nws yog tshwj xeeb tshaj yog haum rau kev hloov pauv loj hauv kev ua haujlwm. Kev siv cov twj tso kua mis kub.
Los ntawm qhov kev xav ntawm kev tswj hwm kev siv, lub tshuab hluav taws xob nthuav dav muaj peb ntu: xws li, actuator thiab sensor. Cov khoom siv tseem ceeb ntawm lub tshuab hluav taws xob nthuav dav valve tswj yog ib qho-chip microcomputer.
Los ntawm kev faib tawm ntawm qhov pom, raws li txoj kev tsav tsheb, muaj ob hom: electromagnetic hom thiab hluav taws xob hom. Feem ntau siv ib qho tam sim no yog hluav taws xob hluav taws xob nthuav dav valve uas tau tsav los ntawm plaub-theem stepper lub cev muaj zog.
Thermal expansion valve
Sab saum toj ntawm lub expansion valve yog tsim los ntawm ib lub thawv kaw, lub hnab ntim zaj duab xis corrugated ntsuas kub thiab lub raj capillary los tsim lub thawv kaw, uas tau ntim nrog Freon los tsim lub tshuab ntsuas. Cov tub yees uas muaj nyob rau hauv qhov kev hnov mob yuav zoo ib yam li cov tub yees, lossis nws tuaj yeem sib txawv.
Lub thermal expansion valve paub qhov kev hloov pauv hauv superheat ntawm qhov hluav taws xob ntawm lub evaporator los ntawm qhov ntsuas kub ntawm qhov ntsuas kub, ua rau qhov ntsuas kub ntawm qhov system kaw) uas muaj cov khoom tsim los tsim cov kev hloov pauv siab thiab ua haujlwm ntawm kev sib kis diaphragm. Nws ua rau lub diaphragm txav mus los, thiab tom qab ntawd xa cov quab yuam no mus rau lub pas nrig kis tau tus mob los ntawm lub phaj kis tau tus mob kom thawb lub valve koob nce thiab nqis, ua rau lub valve kaw los yog qhib, uas ua lub luag haujlwm ntawm kev txo qis thiab throttling thiab txiav. kho cov refrigerant mov ntawm evaporator. Thiab tuav ib qho degree ntawm superheat ntawm qhov hluav taws xob kawg ntawm lub evaporator kom ntseeg tau tias kev siv tag nrho ntawm cov cua sov hloov chaw ntawm cov evaporator thiab txo qhov tshwm sim ntawm cov kua cuam tshuam rau lub tog raj kheej.
Tam sim no, kev hloov pauv ntawm thermal expansion li qub feem ntau nqaim. Qee cov twj tso cua sov yuav tsum tau ua kom txias thiab cua sov, thiab qhov ntsuas kub ntawm qhov nruab nrab ntawm lub sijhawm siv yog los ntawm - 15 degree mus rau + 43 degree , thiab qhov sib thooj refrigerant evaporation kub yuav ua haujlwm nyob rau hauv thaj tsam ntawm {{2} } degree rau 5 degree. Ntxiv mus, yog tias muaj ntau yam compressors nyob rau hauv lub tub yees Circuit Court, tus naj npawb ntawm kev khiav hauj lwm compressors nyob rau hauv lub chav tsev yuav hloov raws li tus neeg siv load hloov, ua rau drastic hloov nyob rau hauv refrigerant flow.
Yog li ntawd, ib qho thermal expansion valve yog nyob deb ntawm kev ua haujlwm hauv cov twj tso kua mis loj. Tam sim no, ntau cov khoom siv hluav taws xob loj loj tau txais ib qho kev tsim hluav taws xob ib leeg nruab nrog ib lub tshuab compressor, thiab txais kev ywj pheej expansion valve systems rau cua txias thiab cua sov hom, uas yuav inevitably nce complexity thiab raug nqi ntawm lub system.
Raws li cov qauv sib txawv ntawm thermal expansion li qub, lawv tau muab faib ua ob hom: hom sib npaug sab hauv thiab sab nraud sib npaug.
Xav txog tias cov tub yees ntws los ntawm cov evaporator thiab ua rau muaj qhov poob siab, txhawm rau txo qhov qhib superheat thiab txhim kho kev siv ntawm qhov chaw hloov hluav taws xob ntawm cov evaporator, qhov kub ntawm evaporation sib haum rau lub siab poob ntawm cov tub yees los ntawm lub expansion valve. Qhov hluav taws xob mus rau lub qhov hluav taws xob evaporator feem ntau yog tias qhov kub poob siab tshaj 2 ~ 3 degree, yuav tsum tau siv cov thermal expansion valve sab nraud.