1. Frosting ntawm qhov chaw nres nkoj rov qab ntawm lub compressor
Frosting ntawm qhov chaw nres nkoj rov qab ntawm lub compressor qhia tau hais tias qhov kub ntawm lub compressor rov qab roj tsawg dhau lawm, thiab peb txhua tus paub tias yog tias cov tub yees ntawm qhov zoo tib yam hloov pauv qhov ntim thiab siab, qhov kub thiab txias yuav muaj qhov sib txawv, uas yog, yog, cov kua refrigerant absorbs cua sov ntau dua, ces tib qhov zoo ntawm refrigerant yuav ua tau siab, kub thiab ntim, thiab yog hais tias lub tshav kub absorbs tsawg, lub siab, kub thiab ntim yuav tsawg.
Uas yog hais tias, yog hais tias qhov rov qab roj kub ntawm lub compressor yog tsawg, nws yuav feem ntau qhia tsis tshua muaj rov qab siab thiab siab npaum li cas ntawm cov tub yees ntawm tib lub ntim nyob rau tib lub sij hawm, thiab lub hauv paus ua rau ntawm qhov teeb meem no yog hais tias lub refrigerant ntws los. lub evaporator tsis tuaj yeem nqus cov cua sov kom tiav rau nws tus kheej nthuav dav mus rau qhov kev txiav txim siab thiab qhov kub thiab txias, ua rau qhov kub thiab txias, siab thiab ntim tus nqi ntawm cov pa rov qab.
Muaj ob qho laj thawj rau qhov teeb meem no:
1. Kev muab cov kua refrigerant rau lub throttle valve yog qhov qub, tab sis lub evaporator tsis tuaj yeem nqus cua sov li ib txwm thiab muab cov tub yees kom nthuav dav.
2. Lub evaporator absorbs cua sov ib txwm, tab sis cov khoom ntawm cov tub yees rau lub throttle valve yog ntau dhau, uas yog, cov refrigerant flow yog ntau dhau, uas peb feem ntau to taub li fluorine ntau dhau lawm, uas yog hais tias, ntau fluorine kuj yuav ua rau. tsis tshua muaj siab.
Qhov thib ob, vim tsis muaj fluorine, lub compressor rov qab roj frosts
1. Vim yog qhov me me ntawm cov tub yees, thawj qhov chaw nthuav dav ntawm cov tub yees yuav pib nthuav tawm tom qab cov tub yees ntws tawm ntawm lub nraub qaum kawg ntawm lub throttle valve, thiab peb feem ntau pom tias cov frosting ntawm lub taub hau cais tawm ntawm lub nraub qaum. Qhov kawg ntawm lub expansion valve feem ntau tshwm sim los ntawm qhov tsis muaj fluorine los yog tsis txaus txaus ntawm lub expansion valve, me me refrigerant expansion yuav tsis siv tag nrho cov evaporator cheeb tsam, thiab yuav tsuas tsim ib tug tsawg kub nyob rau hauv lub evaporator hauv zos.
Tom qab lub zos frosting, vim yog tsim ntawm ib tug thermal rwb thaiv tsev txheej nyob rau saum npoo ntawm lub evaporator thiab tsis tshua muaj cua sov pauv nyob rau hauv lub cheeb tsam no, lub refrigerant expansion yuav raug xa mus rau lwm qhov chaw, thiab tag nrho cov evaporator yuav maj mam Frost los yog khov, tag nrho cov evaporator yuav tsim ib txheej thermal rwb thaiv tsev, yog li qhov nthuav dav yuav kis mus rau compressor rov qab cov yeeb nkab thiab ua rau compressor rov qab cua frosting.
2. Vim tias qhov me me ntawm cov tub yees, qhov evaporation kub yog qhov tsawg vim qhov tsis tshua muaj evaporation siab ntawm evaporator, uas yuav maj mam ua rau cov evaporator condensation los tsim ib txheej thermal rwb thaiv tsev thiab hloov qhov nthuav dav mus rau compressor rov qab. huab cua ua rau lub compressor rov qab cua frosting. Ob qho ntawm cov ntsiab lus saum toj no yuav qhia evaporator frosting ua ntej lub compressor rov qab roj frosts.
Qhov tseeb, feem ntau, rau qhov tshwm sim ntawm frosting, tsuav yog cov roj kub bypass valve raug kho, txoj kev tshwj xeeb yog qhib lub hau kawg ntawm cov roj kub bypass valve, thiab tom qab ntawd siv No. 8 hexagon wrench rau. tig lub txiv ntseej hloov raws li lub voj voog, txoj kev hloov kho yuav tsum tsis txhob nrawm dhau, feem ntau nres txog ib nrab tig, cia lub kaw lus khiav rau lub sijhawm kom pom qhov xwm txheej frosting thiab txiav txim siab seb puas yuav kho ntxiv. Tos kom txog thaum lub lag luam ruaj khov thiab cov frosting ntawm lub compressor ploj ua ntej zawm lub hau kawg.
Rau cov qauv qis dua 15 cubic meters, vim tias tsis muaj cov pa roj kub hla lub valve, yog tias qhov tshwm sim te loj heev, qhov pib siab ntawm condensing kiv cua hloov siab tuaj yeem tsim nyog. Txoj kev tshwj xeeb yog txhawm rau nrhiav lub siab hloov ua ntej, tshem tawm cov txiv ntoo hloov ntawm lub siab hloov los kho qhov me me, thiab tom qab ntawd tig lub moos nrog Phillips ntswj ntsia hlau.
3. Frosting ntawm lub tog raj kheej taub hau (frosting ntawm crankcase nyob rau hauv mob hnyav)
Lub tog raj kheej lub taub hau frosting yog tshwm sim los ntawm ntau qhov chaw ntub dej los yog cov tub yees nqus mus rau hauv lub compressor. Cov laj thawj tseem ceeb rau qhov no yog:
1. Lub qhov qhib ntawm lub thermodynamic expansion valve yog hloov loj heev, thiab lub hnab ntsuas kub ntawm qhov ntsuas kub tau teeb tsa tsis raug lossis qhov kev txhim kho yog xoob, kom qhov kub thiab txias yog siab dhau thiab lub valve tseem qhib txawv txav. Lub thermostatic expansion valve yog ib tug ncaj qha proportional regulator uas siv lub superheat ntawm lub qhov hluav taws xob ntawm lub evaporator raws li ib tug tawm tswv yim teeb liab, thiab muab piv nrog ib tug muab superheat tus nqi los tsim ib tug sib txawv teeb liab los tswj cov ndlwg ntawm refrigerant nkag mus rau hauv lub evaporator, uas. integrates lub transmitter, regulator thiab actuator.
Raws li cov kev sib txawv sib txawv, cov thermostatic expansion valve tuaj yeem muab faib ua ob hom: qhov sib npaug sab hauv thermostatic expansion valve thiab sab nraud sib npaug thermostatic expansion valve. Cov kua refrigerant evaporates nyob rau hauv lub evaporator thiab absorbs tshav kub, thiab thaum nws ntws mus rau lub qhov hluav taws xob ntawm lub evaporator, nws twb vaporized kiag li thiab muaj ib co ntawm cov superheat. Lub thermostatic expansion valve lub thermostat lub tog raj kheej yog txuas nrog lub evaporator qhov hluav taws xob kab thiab qhov kub ntawm qhov hluav taws xob evaporator tau hnov. Yog tias cov kua hauv qhov ntsuas kub zoo ib yam li cov tub yees, cov kua siab saum lub diaphragm ntawm lub ntsuas cua ntawm qhov ntsuas kub yog siab dua li cov kua siab hauv qab lub diaphragm, thiab qhov kub ntawm qhov hluav taws xob ntawm lub evaporator yog siab dua, ntau dua lub superheat, qhov ntau dua cov kua siab saum lub diaphragm.
Qhov sib txawv siab no yog sib npaug los ntawm qhov nro ntawm lub ejector pas nrig thiab lub caij nplooj ntoos hlav hloov nyob rau hauv lub diaphragm. Yog tias koj hloov qhov nro ntawm lub caij nplooj ntoos hlav hloov kho, koj tuaj yeem hloov lub ejector quab yuam ntawm lub ejector pas nrig thiab yog li hloov qhov qhib ntawm rab koob valve. Obviously, lub superheat ntawm lub evaporator tuaj yeem ua rau muaj kev hloov pauv hauv qhov qhib ntawm rab koob valve. Thaum lub caij nplooj ntoos hlav hloov kho nyob rau hauv ib txoj hauj lwm, lub expansion valve yuav cia li hloov qhov qhib ntawm lub koob valve raws li qhov kub ntawm lub evaporator qhov hluav taws xob, kom lub superheat ntawm lub evaporator qhov hluav taws xob tswj ntawm ib tug tej yam nqi.
Qhov qhib ntawm lub thermostatic expansion valve yog hloov loj dhau lawm, thiab lub pob ntsuas qhov ntsuas kub tau teeb tsa tsis raug lossis xoob xoob, kom qhov kub thiab txias yog siab dhau thiab lub valve tseem qhib qhov txawv txav, yog li ntawd cov dej ntub dej ntau yog nqus mus rau hauv. lub compressor thiab lub tog raj kheej taub hau yog frosted. Lub thermostatic expansion valve yog siv ua ke nrog kev hloov kho ntawm superheat thaum lub evaporator ua haujlwm.
Yog hais tias lub superheat ntawm lub evaporator qhov hluav taws xob loj heev, lub superheating seem nyob rau hauv lub rear ntawm lub evaporator ntev dhau lawm, thiab lub tub yees muaj peev xwm yuav txo tau ho; Yog tias lub qhov hluav taws xob superheat tsawg dhau, nws yuav ua rau compressor kua poob siab lossis txawm lub tog raj kheej taub hau frosting. Nws yog feem ntau ntseeg hais tias lub expansion valve yuav tsum tau hloov mus rau lub qhov hluav taws xob ntawm lub evaporator thiab lub superheat ua hauj lwm yuav tsum yog 3 degree ~ 8 degree.
2. Cov dej ntws tawm ntawm lub solenoid valve rau cov kua dej los yog qhov tsis ua haujlwm kaw lub valve nthuav dav thaum kaw ua rau cov kua tub yees ntau ntau rau hauv cov evaporator ua ntej pib. Qhov kub thiab txias relay yog siv ua ke nrog lub solenoid valve los tswj qhov kub thiab txias.
Thaum qhov kub ntawm qhov txias cia siab tshaj qhov siab tshaj ntawm qhov pib ntawm tus nqi pib, qhov kub thiab txias relay tau qhib, lub solenoid valve coil yog energized, lub valve qhib, thiab cov tub yees nkag mus rau hauv lub evaporator kom txias; Thaum qhov ntsuas kub qis dua qhov qis qis ntawm nws cov nqi teev, qhov kub thiab txias relay raug txiav tawm, lub solenoid valve coil tam sim no raug txiav tawm, lub solenoid valve raug kaw, thiab cov tub yees nres nkag mus rau hauv lub evaporator, kom qhov kub thiab txias. tuaj yeem tswj tau nyob rau hauv qhov xav tau ntau yam.
3. Thaum pib lub tshuab compressor, lub tshuab nqus tsev kaw lub valve qhib loj lossis ntxov dhau.
4. Thaum muaj cov tub yees ntau dhau hauv lub cev, cov kua theem hauv lub condenser yog siab dua, qhov sib txawv ntawm qhov sib txawv ntawm qhov kub thiab txias yog txo, thiab lub condensation siab nce, uas yog, lub siab nyob rau hauv pem hauv ntej ntawm lub expansion valve nce, thiab lub condensation siab yuav nce. Cov koob yees duab tub yees uas ntws mus rau hauv lub evaporator nce, thiab cov kua refrigerant tsis tuaj yeem ua tiav hauv cov evaporator, yog li lub compressor nqus hauv cov chav ntub dej, lub tog raj kheej txias los yog khov, thiab tej zaum yuav ua rau "kua poob siab", thiab lub evaporation siab kuj yuav raug siab.
